SERVICE MANUAL(INTERNATIONAL) IMPINGER CONVEYOR OVENS MODEL SERIES 1000 & 1200 Lincoln Foodservice Products, LLC 1111 North Hadley Road Fort Wayne, Indiana 46804 United States of America Phone : (800) 374-3004 U.S. Fax: (888) 790-8193 • Int’l Fax: (260) 436-0735 Technical Service Hot Line (800) 678-9511 www.lincolnfp.com 1000serviceexp REV: 9/25/08 TABLE OF CONTENTS TABLE OF CONTENTS............................................................................................................................................. 2 SEQUENCE OF OPERATIONS 1002/1003.............................................................................................................. 3 SEQUENCE OF OPERATIONS 1006....................................................................................................................... 4 SEQUENCE OF OPERATIONS 1028 / 1029 / 1228 / 1229...................................................................................... 5 SEQUENCE OF OPERATIONS 1030....................................................................................................................... 6 SEQUENCE OF OPERTIONS 1032 ......................................................................................................................... 7 SEQUENCE OF OPERATIONS / 1033, 1034, 1046, 1047....................................................................................... 8 SEQUENCE OF OPERATIONS 1042 / 1043 / 1242 / 1243.................................................................................... 10 SCHEMATIC / 1002, 1003 ...................................................................................................................................... 12 SCHEMATIC / 1006 TO SERIAL NUMBERS Q14279............................................................................................ 13 SCHEMATIC / 1028, 1029, S/N Q19071 & BELOW ............................................................................................... 14 SCHEMATIC / 1028, 1029, S/N Q19078 & ABOVE................................................................................................ 15 SCHEMATIC / 1030, TO S/N Q17170..................................................................................................................... 16 SCHEMATIC / 1030, S/N Q17171 & ABOVE.......................................................................................................... 17 SCHEMATIC / 1032. S/N Q19077 & BELOW ......................................................................................................... 18 SCHEMATIC / 1032, S/N Q19078 & ABOVE.......................................................................................................... 19 SCHEMATIC / 1033, 1034, 1046, 1047 .................................................................................................................. 20 SCHEMATIC / 1042, 1043, S/N Q14279 & BELOW ............................................................................................... 21 SCHEMATIC / 1042, 1043, S/N Q14280 & ABOVE................................................................................................ 22 SCHEMATIC / 1228. 1229, S/N Q14790 & BELOW ............................................................................................... 23 SCHEMATIC / 1228, 1229, S/N Q14791 & ABOVE................................................................................................ 24 SCHEMATIC / 1242, 1243 ...................................................................................................................................... 25 TROUBLESHOOTING GUIDE 1000 & 1200 / GAS OVENS ................................................................................. 26 TROUBLESHOOTING GUIDE 1000 & 1200 SERIES / ELECTRIC OVENS.......................................................... 39 TROUBLESHOOTING / GAS OVENS 1033, 1034, 1046, 1047............................................................................. 46 REMOVAL, INSTALLATION & ADJUSTMENTS .................................................................................................... 53 MODEL SERIES 1000 &1200.............................................................................................................................. 53 PARTS / MODEL SERIES 1000 & 1200 - GENERAL............................................................................................. 80 BLOW UP / 1000, 1200 – GENERAL...................................................................................................................... 81 PARTS / MODEL 1002-1003 , S/N 2584 TO 4389 ................................................................................................. 82 BLOW UP / 1002, 1003 – S/N 2584 to 4389........................................................................................................... 83 PARTS / MODEL 1002-1003, S/N 4390 & UP ........................................................................................................ 84 BLOW UP / 1002, 1003 – S/N 4390 & ABOVE ....................................................................................................... 85 PARTS / MODEL 1006 ............................................................................................................................................ 86 BLOW UP / 1006 ..................................................................................................................................................... 87 PARTS / 1028-1029-1032 ....................................................................................................................................... 88 BLOW UP / 1028, 1029, 1032 ................................................................................................................................. 89 PARTS/ MODEL 1030 ............................................................................................................................................. 90 BLOW UP / 1030 ..................................................................................................................................................... 91 PARTS / 1042, 1043................................................................................................................................................ 92 BLOW-UP / 1042, 1043 ........................................................................................................................................... 93 PARTS / 1033, 1034, 1046, 1047............................................................................................................................ 94 BLOW-UP / 1033, 1034, 1046, 1047....................................................................................................................... 95 PARTS / 1228-1229................................................................................................................................................. 96 BLOW UP / 1228, 1229 ........................................................................................................................................... 97 PARTS / 1242, 1243................................................................................................................................................ 98 BLOW - UP / 1242, 1243......................................................................................................................................... 99 PARTS / OVEN BACK - GAS................................................................................................................................ 100 BLOW UP / OVEN BACK – GAS .......................................................................................................................... 101 PARTS / OVEN BACK- ELECTRIC....................................................................................................................... 102 BLOW UP / OVEN BACK – ELECTRIC ................................................................................................................ 103 PARTS / CONVEYOR MOTOR ASSEMBLY S/N 4390 & ABOVE ....................................................................... 104 BLOW UP / CONVEYOR MOTOR ASSEMBLY S/N 4390 & ABOVE .................................................................. 105 PARTS / SERIES 1000 – CONVEYOR................................................................................................................. 106 BLOW UP / SERIES 1000 CONVEYOR ............................................................................................................... 107 PARTS / SERIES 1200 - CONVEYOR CONTROL............................................................................................... 108 BLOW UP / SERIES 1200 – CONVEYOR CONTROL ......................................................................................... 109 PARTS / SERIES 1200 – CONVEYOR................................................................................................................. 110 BLOW UP / SERIES 1200 – CONVEYOR ............................................................................................................ 111 2 Impinger I -–1000 Series Service Manual - International SEQUENCE OF OPERATIONS 1002/1003 MODEL 1002 - 240VAC - 50HZ - NATURAL GAS MODEL 1003 - 240VAC - 50HZ - L.P. GAS POWER SUPPLY Electrical Power to be supplied to the Oven by a three conductor service. Black conductor is Hot Red conductor is Neutral Green conductor is Ground When the temperature in the Control Box reaches 120°F + 3°, the Cooling Fan Thermostat will switch power to the Control Box Cooling Fan. The Thermostat will interrupt power to the Cooling Fan when the Control Box temperature falls to 100°F + 3°. Electrical power is permanently supplied to the normally open contacts of the Double Pole Main Fan Relay, the Cooling Fan Thermostat, the normally open Double Pole Main Fan Switch, and the normally open Cool Down Thermostat (thermostat closes at 160°F and opens at140°F). Closing the Main Fan Switch supplies 240 VAC through a 3A Fuse to the primary of the control circuit Step down Transformer. The Transformer steps the voltage down to 120 VAC for the control circuit. 120 VAC is supplied to the coil of the Double Pole Main Fan Relay. The coil of the relay is energized. The normally open contacts now close, energizing the Main Fan Motor through one 10A Fuse. Closing the Fan Switch also supplies power to the Cooling Fan, Hour Meter (hour meter discontinued after S/N 3484), the 12.6 VAC Transformer, the Burner and Conveyor Switches. Closing the Fan Switch and the normally open Burner Switch supplies 120 VAC through the Air Pressure Switch, to the normally open contacts of the Burner Motor Relay, and the primary of the 24 VAC Step Down Transformer. The Transformer secondary supplies 24 VAC to the Relay Coil (the normally open contacts close within 30 seconds), and the normally open Centrifugal Switch. When the Relay contacts close, the Burner Blower Motor is energized. As this motor reaches approximately 1600 R.P.M., its internal centrifugal switch closes, supplying 24 VAC to the Gas Control Valve. When the Gas Control Valve is supplied with 24 VAC, the pilot valve is energized, and the igniter circuit is energized. Ignition should now occur. After pilot flame is proven, the main gas valve is energized. The Burner Indicator Light is also energized. Closing the Fan Switch and the normally open Conveyor Switch supplies 120 VAC through a 3A Fuse, to the Motor Control Board. AC volts are converted to D.C. volts and are supplied to the Conveyor Motor at board terminals A1 and A2 through a D.P.D.T. Reversing Switch. Adjustment of the Speed Control Potentiometer (500 ohm, 10 turn) will change resistance at terminals S1, S2, and S3 varying the D.C. voltage to the motor. The speed of the Conveyor Motor will increase or decrease as the D.C. voltage from the Motor Control Board increases or decreases respectively Closing the fan switch and the conveyor switch supplies 120 VAC to the Motor Control Board. AC volts are converted to DC volts and are supplied to the Conveyor Motor at terminals A+ and A-. Adjustment of the Speed Control Potentiometer (5,000 ohm 10 turn) will change resistance at terminals P1, P2, and P3 varying the DC voltage to the motor. The speed of the conveyor motor will increase or decrease as the DC voltage from the board increases or decreases respectively. As the motor turns, it drives both the reducer gear box and the tach. generator which supplies a voltage to the DC motor control board and is used as a reference for maintaining a constant conveyor speed CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT BURNER CIRCUIT CONVEYOR DRIVE (S/N 100 to 4389) (S/N 4390 and UP) Impinger I -–1000 Series Service Manual - International 3 The coil of the Relay is energized.6 VAC Transformer.1 PHASE . The secondary output of the transformer. The Burner Indicator Light is also energized. Closing the fan switch and the normally open conveyor switch supplies 120 VAC to the Motor Control Board .M. Display uses a slotted disc (cemented to tach. the normally open contacts now close. The center tap is terminal 2.TIME TEMP DISPLAY The Time/Temp Display is energized when the Fan Switch is closed. Electrical power is permanently supplied to the normally open contacts of the Double Pole Main Fan Relay.6 VAC) BURNER CIRCUIT CONVEYOR DRIVE (S/N 4390 AND UP) 4 . to the normally open contacts of the Burner Motor Relay. and 3 of the Time/Temp Display. and the motor's internal centrifugal switch closes supplying 24 VAC to the Gas Control Valve. The Transformer steps the voltage down to 12. and the primary of the 24 VAC Step Down Trans-former. (The transformer steps the voltage down to 120VAC for the control circuit) 120 VAC is supplied to the coil of the Main Fan Relay. energizing the Main Fan Motor through one 10A fuse. and the normally open Cool Down Thermostat (thermostat closes at 160°F and opens at 140°F).P.. the pilot valve is energized.2.6 volt Transformer. Closing the Main Fan Switch supplies 240 VAC to the primary of the control circuit Step Down Transformer. When the Gas Control Valve is supplied with 24 VAC. The voltage from each leg of the Transformer's secondary to the center tap should be one half of the secondary voltage.240 VAC . supplying 120 VAC to the primary of the 12. and the igniter circuit is energized.International CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT TRANSFORMER (12. Ignition should now occur. the 12. As this motor reaches approximately 1600 R. and through the Burner Air Pressure Switch to the normally open Centrifugal Switch. the main gas valve is energized. Closing the Fan Switch also supplies power to the Cooling Fan. The Transformer secondary supplies 24 VAC to the coil of the Burner Motor Relay (the normally open contacts close within 30 seconds). The thermistor outputs a resistance proportional to the oven temperature. normally 13 to 14 VAC (depending on input). The speed of the conveyor motor will Impinger I -–1000 Series Service Manual .6 VAC Transformer. The display converts these pulses into a read-out of minutes and seconds.AC volts are converted to DC volts and are supplied to the Conveyor Motor at terminals A+ and A-. and P3 varying the DC voltage to the motor. is supplied to terminals 1. and through a 3A Fuse to the normally open Double Pole Main Fan Switch. Closing the Fan Switch and the normally open Burner Switch supplies 120 VAC through the Air Pressure Switch. When the Relay contacts close. After pilot flame is proven. and supplies power to the Time/Temp Display. This resistance is then converted by the display into a temperature reading. The speed side of the Time/Temp. the Cooling Fan Thermostat. Red conductor is Hot Black conductor is Neutral Green conductor is Ground When the temperature in the Control Box reaches 120°F + 3°. Adjustment of the Speed Control Potentiometer (5000 ohm 10 turn ) will change resistance at terminals P1. 120 VAC is supplied to the primary of the 12. the Cooling Fan Thermostat will switch power to the Control Box Cooling Fan. The temperature portion of the display uses a Thermistor Probe to sense oven temperature. The Thermostat will interrupt power to the Cooling Fan when the Control Box temperature falls to 100°F + 3°. the Burner Air Pressure Switch closes. P2. the Burner and Conveyor Switches Upon closure of the Fan Switch.NATURAL GAS POWER SUPPLY Electrical Power to be supplied to the Oven by a three conductor service.50HZ .6 VAC (normally 13 to 14 VAC) with a center tap. coupling) to break the infra-red light beam of the optical switch (mounted on gear motor) producing electrical pulses that are transmitted to the display. the Burner Blower Motor is energized. with a center tap. SEQUENCE OF OPERATIONS 1106 MODEL 1006 . The display works on a balanced input and center tap voltage to each leg must be 1/2 the total reading. The display converts these pulses into a read-out of minutes and seconds.6 VAC Transformer.6 VAC Transformer. The Tach. 120 VAC is supplied to the primary of the 12. Closing the Fan Switch and the normally open Heat Switch supplies 120 VAC through the normally open Air Pressure Switch. The secondary output of the transformer. As the motor turns. The Temperature Control Potentiometer (2.50 HZ . (The transformer steps the voltage down to 120 VAC for the control circuit. The thermistor outputs a resistance proportional to the oven temperature. through a 1A Fuse to the normally open Double Pole Main Fan Switch.415Y/240 VAC . Black conductor is Hot Red conductor is Hot Orange conductor is Hot White conductor is Dedicated Neutral Green conductor is Ground Electrical power is permanently supplied through 3. the coil of the Mercury Contactor.3 PHASE MODEL 1228 .6 VAC (normally 13 to 14 VAC) with a center tap. and to the Heat Indicator Light.415Y/240 VAC . and the Heat and Conveyor Switches. Display uses a slotted disc (cemented to tach. The center tap is terminal 2. the Control Box Cooling Fan.DUAL BELT MODEL 1229 .DUAL BELT POWER SUPPLY Electrical Power to be supplied to the Oven by a five conductor service. Display. The voltage from each leg of the Transformer's secondary to the center tap should be one half of the secondary voltage.3 PHASE . The Time/Temp. The Transformer steps the voltage down to 12. Upon closure of the Fan Switch. opens at 190°F) and. The coil of the relay is energized.50 HZ .2. with a center tap is supplied to terminals 1. normally 13 to 14 VAC (depending on input). to the L1 terminal of the Temperature Control Board. Closing the Main Fan Switch also supplies power to the 12. and to the normally open Cool-Down Thermostat (thermostat closes at 160°F and opens at 140°F. 5 MAIN FAN CIRCUIT TRANSFORMER (12.380Y/220 VAC . Generator. The display works on a balanced input and center tap voltage to each leg must be 1. Generator is a DC voltage generator. and 3 of the Time/Temp Display. the 3A Fuse. When the Heat Switch is closed.6 VAC) HEAT CIRCUIT TEMPERATURE CONTROL Impinger I -–1000 Series Service Manual . The Temperature Controller switches the L 2 line of the Contactor coils at intermittent intervals to maintain desired temperatures.50 HZ . 50A fuses to the normally open contacts of the Mercury Contactor. and the normally closed Hi-Limit Thermostat (manually re-settable.6 volt Transformer. The Thermocouple will provide varying millivolts to the Temperature Controller.) Closing the Main Fan Switch supplies 220 or 240 VAC to the primary of the control circuit Step Down Transformer.2 the total reading.International .50 HZ . 10A fuse to the normally open contact of the Main Fan Relay. energizing the Main Fan Motor. SEQUENCE OF OPERATIONS 1028 / 1029 / 1228 / 1229 MODEL 1028 .3 PHASE . the normally open contacts close. which supplies a voltage to the DC motor control board and is used as a reference for maintaining a constant conveyor speed. it drives both the reducer gearbox and the Tach.TlME/TEMP DISPLAY increase or decrease as the DC voltage from the board increases or decreases respectively. Power is also supplied through 1. The speed side of the Time/Temp. The temperature portion of the display uses a Thermistor Probe to sense oven temperature. 120 VAC is supplied to the Temperature Control.3 PHASE MODEL 1029 . This resistance is then converted by the display into a temperature reading.380Y/220 VAC . Display is energized when the Fan Switch is closed.) 120 VAC is supplied to the coil of the Main Fan Relay. and supplies power to the Time/Temp. supplying 120 VAC to the primary of the 12. coupling) to break the infra-red light beam of the optical switch (mounted on gear motor) producing electrical pulses that are transmitted to the display.5K ohm) is adjusted to desired temperature. CONVEYOR DRIVE (S/N 100 to 4389) (S/N 4390 and UP 1000 Series) (S/N 4390 to 14790 1200 Series) (S/N 14791 & Above 1200 Series See Page 9 NOTE TIME TEMP DISPLAY(S/N 4390 & Above1000 Series) S/N 4390-147901200 Series) (T/T Display S/N Q14791& Above1200 Series See Page 9 NOTE Closing the Fan Switch and the normally open Conveyor Switch supplies 120 VAC through a 3A Fuse. is supplied to terminals 1. 10 turn) will change resistance at terminals S1. 120 VAC is supplied to the primary of the 12. S2. generator is a DC voltage generator which supplies a voltage to the DC motor control board and is used as a reference for maintaining a constant conveyor speed. The 1200 Series Ovens use a Double Pole Double Throw Switch to connect the two Optical Encoder Assemblies to the Time/Temp.C. The display converts these pulses into a read-out of minutes and seconds. SEQUENCE OF OPERATIONS 1030 MODEL 1030 . The Transformer steps the voltage down to 12. with a center tap. Reversing Switch. Adjustment of the Speed Control Potentiometer (500 ohm. The Thermostat will interrupt power to the Cooling Fan when the Control Box temperature falls to 100°F + 3°. voltage from the Motor Control Board increases or decreases respectively.P. the Cooling Fan Thermostat. and the normally open Cool Down Thermostat (thermostat closes at 160°F and opens at 140°F). The temperature portion of the display uses a Thermistor Probe to sense oven temperature. Display is energized when the Fan Switch is closed. The display works on a balanced input and center tap voltage to each leg must be 1/2 the total reading.C. and P3 varying the DC voltage to the motor. The speed of the conveyor motor will increase or decrease as the DC voltage from the board increases or decreases respectively. Black conductor is Hot Red conductor is Neutra Green conductor is Ground When the temperature in the Control Box reaches 120°F + 3°. Adjustment of the Speed Control Potentiometer (5. Display uses a slotted. supplying 120 VAC to the primary of the 12.2.6 VAC Transformer.220 VAC .D. AC volts are converted to D. and 3 of the Time/Temp.C. the Temperature Controller and the Conveyor Switch. either the front or rear belt speed can be shown by the Time/Temp. normally 13 to 14 VAC (depending on input). Electrical power is permanently supplied to the normally open contacts of the Double Pole Main Fan Relay. Display.6 VAC) 6 . to the Motor Control Board.6 volt Transformer. it drives both the reducer gearbox and the tach. voltage to the Conveyor Motor. The Time/Temp. and S3 varying the D. The speed of the Conveyor Motor will increase or decrease as the D.6 VAC Transformer. The speed side of the Time/Temp. volts and are supplied to the Conveyor Motor at board terminals A1 and A2 through a D.disc (cemented to tach. the normally open contacts close. The secondary output of the transformer. By activating the switch.International CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT TRANSFORMER (12. supplying 220 VAC through one 10A Fuse to the Main Fan Motor. Closing the Main Fan Switch supplies 220 VAC through a 3A Fuse to the (normally open) Burner Switch. coupling) to break the infra-red light beam of the optical switch (mounted on gear motor) producing electrical pulses that are transmitted to the display.T. The thermistor outputs a resistance proportional to the oven temperature. Upon closure of the Fan Switch. P2.50HZ . The center tap is terminal 2. 120 VAC is also supplied to the 12.6 VAC (normally 13 to Impinger I -–1000 Series Service Manual . the normally open Main Fan Switch. This resistance is then converted by the display into a temperature reading. Display. Closing the fan switch and the normally open Conveyor switch supplies 120 VAC to the Motor Control Board. generator. The tach.000 ohm 10 turn ) will change resistance at terminals P1. As the motor turns. The 1200 Series Ovens utilize 2 complete conveyor drive systems. and to the control circuit Step Down Transformer (the transformer steps the voltage down to 120 VAC for the control circuit) 120 VAC is supplied to the coil of the Main Fan Relay The coil is energized.1 PHASE POWER SUPPLY Electrical Power to be supplied to the Oven by a three conductor service. AC volts are converted to DC volts and are supplied to the Conveyor Motor at terminals A+ and A-. Display. the Cooling Fan Thermostat will switch power to the Control Box Cooling Fan. and through the Main Fan Air Pressure Switch.International . The center tap is terminal 2. is supplied to terminals 1. The voltage from each leg of the Transformer's secondary to the center tap should be one half of the secondary voltage Closing the normally open Burner Switch supplies 220 VAC.2. the normally open contacts close.3 PHASE POWER SUPPLY Electrical Power to be supplied to the Oven by a five conductor service Black conductor is Hot Red conductor is Hot Orange conductor is Hot White conductor is Dedicated Neutral Green conductor is Ground Electrical power is permanently supplied through 3. The temperature portion of the display uses a Thermistor Probe to sense oven temperature. The tach.380Y/220 VAC . energizing the Main Fan Motor. The coil of the relay is energized. generator is a DC voltage generator which supplies a voltage to the DC motor control board and is used as a reference for maintaining a constant conveyor speed. with a center tap.6 volt Transformer.BURNER CIRCUIT TEMPERATURE CONTROL CONVEYOR DRIVE (S/N4390-Q17170) (Conveyor Drive Q171701 & Above See Page 9) (Time/Temp Display Q17171 & Above See Page 9) TIME/TEMP DISPLAY(Q17171 & Above See Page 9 14 VAC) with a center tap. The 2. its normally open contacts now close. it drives both the reducer gearbox and the tach. The speed side of the Time Temp. The display works on a balanced input and center tap voltage to each leg must be 1/2 the total reading. Closing the Main Fan Switch also supplies power to the 12. and 3 of the Time/Temp. SEQUENCE OF OPERTIONS 1032 MODEL 1032 . Ignition should now occur. Closing the Fan Switch supplies (through the Step down Transformer) 120 VAC to the Temperature Control Board. Closing the fan switch and the normally open conveyor switch supplies 120 VAC to the Motor Control Board. (The transformer steps the voltage down to 120 VAC for the control circuit. the Control Box Cooling 7 MAIN FAN CIRCUIT Impinger I -–1000 Series Service Manual . The display converts these pulses into a read-out of minutes and seconds. through the gas pressure-proving switch. Display. As the motor turns.50 HZ .) Closing the Main Fan Switch supplies 220VAC to the primary of the control circuit Step Down Transformer. After pre-purge period of between 30 and 60 seconds. generator. normally 13 to 14 VAC (depending on input).5K ohm Temperature Potentiometer is adjusted to desired temperature. The combustion motor relay is energized. coupling) to break the infra-red light beam of the optical switch (mounted on gear motor) producing electrical pulses that are transmitted to the display. The Thermocouple will provide varying millivolts to the Temperature Controller. Display is energized when the Fan Switch is closed. the Ignition Transformer is energized and the Main Gas Valve is energized. Adjustment of the Speed Control Potentiometer (5.000 ohm 10 turn) will change resistance at terminals P1. AC volts are converted to DC volts and are supplied to the Conveyor Motor at terminals A+ and A-. P2.) 120 VAC is supplied to the coil of the Main Fan Relay. The thermistor outputs a resistance proportional to the oven temperature. and P3 varying the DC voltage to the Conveyor Motor.6 VAC Transformer. The secondary output of the transformer. and supplies power to the Time/Temp Display. The speed of the conveyor motor will increase or decrease as the DC voltage from the board increases or decreases respectively. supplying 120 VAC to the primary of the 12. This resistance is then converted by the display into a temperature reading. supplying120 VAC to the combustion motor. through a 1A Fuse to the normally open Double Pole Main Fan Switch. and to the normally open Cool-Down Thermostat (thermostat closes at 160°F and opens at 140°F. The normally open combustion air switch closes upon sensing air. to the Ignition Control. The Temperature Controller supplies 120 VAC to the Solenoid Valve at intermittent intervals to maintain desired temperature. 50A fuses to the normally open contacts of the Mercury Contactor. Display uses a slotted disc (cemented to tach. The Time/Temp. Power is also supplied through one 10A fuse to the normally open contact of the Main Fan Relay. Display is energized when the Fan Switch is closed.P. Display. The secondary output of the transformer. Brown conductor is Hot Blue conductor is Neutral Green conductor is Ground When the temperature in the Control Box reaches 120°F± 3°. the normally open Conveyor Switch. it drives both the reducer gear box and the tach.6 VAC Transformer.P.2.TRANSFORMER (12. The Thermocouple will provide varying millivolts to the Temperature Controller. opens at 368°C) through the 3A Fuse. 1047 MODEL 1033 / 220 VAC .6 volt Transformer. The Time/Temp. 120 VAC is supplied to the Temperature Control.International POWER SUPPLY CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT 8 . 1034. the Cooling Fan Thermostat. Closing the oven fan switch supplies 220 VAC. The center tap is terminal 2. with a center tap. and supplies power to the Time/Temp Display. coupling) to break the infra-red light beam of the optical switch (mounted on gear motor) producing electrical pulses that are transmitted to the display.The display works on a balanced input and center tap voltage to each leg must be 1/2 the total reading. to the Temperature Control Board.6 VAC) HEAT CIRCUIT TEMPERATURE CONTROL CONVEYOR DRIVE (S/N 4390 AND UP) TIME TEMP DISPLAY Fan. and to the coil of the Impinger I -–1000 Series Service Manual . 1046. The Thermostat will interrupt power to the Cooling Fan when the Control Box temperature falls to 100°F±3°. and P3 varying the DC voltage to the Conveyor Motor. Upon closure of the Fan Switch. The speed of the conveyor motor will increase or decrease as the DC voltage from the board increases or decreases respectively. through a 3 AMP Fuse.000 ohm 10 turn ) will change resistance at terminals P1. and the normally closed Hi-Limit Thermostat (manually re-settable.50HZ / NATURAL GAS MODEL 1034 / 220 VAC . and the Heat and Conveyor Switches. normally 13 to 14 VAC (depending on input). The Temperature Controller switches the L2 line of the Contactor coil at intermittent intervals to maintain desired temperature.50HZ / NATURAL GAS MODEL 1047 / 240 VAC . GAS Electrical Power to be supplies to the oven by a three-conductor service. SEQUENCE OF OPERATIONS / 1033. generator is a DC voltage generator which supplies a voltage to the DC motor control board and is used as a reference for maintaining a constant conveyor speed. 120 VAC is supplied to the Cooling Fan. GAS MODEL 1046 / 240 VAC . and to the Heat Indicator Light.6 VAC (normally 13 to 14 VAC) with a center tap. supplying 120 VAC to the primary of the12. P2. The display converts these pulses into a read-out of minutes and seconds. and 3 of the Time/Temp. generator. The voltage from each leg of the Transformer's secondary to the center tap should be one half of the secondary voltage. the coil of the Mercury Contactor. This resistance is then converted by the display into a temperature reading. to the primary of the Power Transformer (the transformer steps the voltage down to 120 VAC for the control circuit).50HZ / L. the Electronic Temperature Control.5K ohm) is adjusted to desired temperature.50HZ / L. Closing the Fan Switch and the normally open Heat Switch supplies 120 VAC through the normally open Air Pressure Switch. As the motor turns. When the Heat Switch is closed. 120 VAC is supplied to the primary of the 12. The speed side of the Time/Temp. The thermistor outputs a resistance proportional to the oven temperature. Electrical power is permanently supplied to the normally open contacts of the oven fan motor relay. the Cooling Fan Thermostat will switch power to the Control Box Cooling Fan. Display uses a slotted disc (cemented to tach. The Transformer steps the voltage down to 12. The tach. The Temperature Control Potentiometer (2. Closing the fan switch and the normally open conveyor switch supplies 120 VAC to the Motor Control Board AC volts are converted to DC volts and are supplied to the Conveyor Motor at terminals A+ and A-. The temperature portion of the display uses a Thermistor Probe to sense oven temperature. and the normally open Oven Fan Switch. is supplied to terminals 1. Adjustment of the Speed Control Potentiometer (5. This resistance is then converted by the Display into a temperature reading. through a 3 AMP Fuse. Impinger I -–1000 Series Service Manual . After a pre-purge period of 30-60 seconds. the main gas valve and the spark generator are energized. the Time/Temp Display will show --:-. the gas control relay and the burner indicator lamp are energized. If the motor is not turning. The secondary of this Transformer supplies 10 VAC and 29 VAC to the Conveyor Control. to the normally open Conveyor Switch. The voltage from each leg of the Transformer's secondary to the center tap should be one half of the secondary voltage.TRANSFORMER(12. through the Power Transformer. (An electronic flame monitor proves main flame operation in the 1033-1034 models) Closing the Oven Fan Switch supplies 120 VAC. mounted on the Conveyor Motor that senses when the motor is not turning. NOTE: The Conveyor Control uses a sensor and magnet. with the frequency of the pulses to the Conveyor Motor. Display into a read out of minutes and seconds. 12. Upon closure of the Fan Switch. Transformer. by the Conveyor Control. through the Power Transformer. The display works on a balanced input. Its normally open contacts close. Closing the normally open burner switch supplies 220 VAC through the oven air pressure switch. and a 30 second delay. Display. The Temperature Controller supplies 120 VAC to the Solenoid Valve at intermittent intervals to maintain desired temperature. The Transformer steps the voltage down to 12. and the center tap voltage to each leg must be 1/2 the total reading. Display is supplied. these normally open contacts now close. Ignition should now occur.6 VAC Transformer. The Thermistor outputs a resistance proportional to oven temperature. The thermocouple generates D. to the primary of the Conveyor Control Transformer.6 VAC (normally 13 to 14 VAC) with a center tap. 2.C.International 9 . millivolts proportional to oven temperature. and supplies power to the Time/Temp Display. supplying 220 VAC to the Oven Fan Motor.in the window. The Conveyor Control Potentiometer varies the frequency of these pulses. This millivolt reading is then converted by the display into a temperature reading. Closing the Conveyor Switch supplies 120 VAC. as the frequency of the pulses increase or decrease respectively. The Thermocouple will provide varying millivolts to the Temperature Controller. The normally open burner blower air pressure switch closes upon sensing air pressure. The conveyor control supplies voltage pulses to the Conveyor Control. to the primary of the Time/Temp. and of the Time/Temp. 120 VAC is supplied to the primary of the 12. OR: The temperature portion of the display uses a "J" type thermocouple to measure oven temperature. the normally closed high limit thermostat (opens at 368°C) to the ignition control. Closing the Oven Fan Switch supplies 120 VAC. The combustion motor is now energized.5 to 15 VAC with a center tap. The 20-minute Time Delay module supplies 120 VAC to the oven fan motor relay. the gas inlet pressure switch. is supplies to terminals 1. The temperature portion of the display uses a Thermistor Probe to sense oven temperature. This frequency is converted by the Time/Temp. supplying 220 VAC to the Burner Switch and enabling the 20-minute Time Delay module. The secondary output of the Transformers. After proving the pilot flame.The speed side of the Time/Temp. The motor speed will increase or decrease.6V AC) BURNER CIRCUIT TEMPERATURE CONTROL CONVEYOR DRIVE TIME TEMP DISPLAY oven start and cool down relay. Closing the Fan Switch supplies (through the Step Down Transformer) 120 VAC to the Temperature Control Board. The Temperature Potentiometer is adjusted to desired temperature. The normally open contacts now close. 120 VAC is supplied to the primary of the 12. the 12. the pilot valve is energized. Upon closure of the Fan Switch. After pilot flame is proven. The Temperature Controller supplies 120 VAC to the Solenoid Valve at intermittent intervals to maintain desired temperature.M its internal centrifugal switch closes. As the motor turns.240V .000 ohm 10 turn ) will change resistance at terminals P1.600 R. 120 VAC is supplied to the coil of the Double Pole Main Fan Relay.6 VAC Transformer the Burner and Conveyor Switches. and the igniter circuit is energized.P.6 VAC Transformer. the Cooling Fan Thermostat will switch power to the Control Box Cooling Fan. 1000 series) (S/N Q14791 & Above. and the normally open Centrifugal Switch. the Main Gas Valve is energized.P.NATURAL GAS/DUAL BELT MODEL 1243 . Closing the Fan Switch and Burner Switch supplies 120 VAC to the Temperature Control Board.50HZ . AC volts are converted to DC volts and are supplied to the Conveyor Motor at terminals A+ and A-. Closing the fan switch and the normally open conveyor switch supplies 120 VAC to the Motor Control Board. The transformer's secondary supplies 24 VAC to the burner motor relay coil (the normally open contacts close within 30 seconds). the normally open Double Pole Main Fan Switch. 9) 10 Impinger I -–1000 Series Service Manual . energizing the Main Fan Motor through one 10A Fuse. The coil of the relay is energized. Closing the Fan Switch also supplies power to the Cooling Fan.6 VAC) BURNER CIRCUIT TEMPERATURE CONTROL CONVEYOR DRIVE (S/N Q14790 & Below. GAS MODEL 1242 .GAS/DUAL BELT POWER SUPPLY Electrical Power to be supplied to the Oven by a three conductor service. the Burner Blower Motor is energized. When the Gas Control Valve is supplied with 24 VAC. generator is a DC voltage generator which supplies a voltage to the DC motor control board and is used as a reference for maintaining a constant conveyor speed. and the normally open Cool Down Thermostat (thermostat closes at 160°F and opens at 140°F).240V .SEQUENCE OF OPERATIONS 1042 / 1043 / 1242 / 1243 MODEL 1042 . the Cooling Fan Thermostat. Adjustment of the Speed Control Potentiometer (5. Closing the Fan Switch and the normally open Burner Switch supplies 120 VAC through the Air Pressure Switch.50HZ .P. the normally open contacts of the Burner Motor Relay (Burner Motor Relay discontinued after S/N 14791) and the primary of the 24 VAC Transformer. The tach.50HZ . Electrical power is permanently supplied to the normally open contacts of the Double Pole Main Fan Relay. As this motor reaches approx.International . The Transformer steps the voltage down to 120 VAC for the control circuit.NATURAL GAS MODEL 1043 . The Burner Indicator Light is also energized.240V . Closing the Main Fan Switch supplies 240 VAC through a 3A Fuse to the primary of the control circuit Step Down Transformer. The speed of the conveyor motor will increase or decrease as the DC voltage from the board increases or decreases respectively. 1000 series refer to Pg. generator. The 1K or 1000 ohm Temperature Potentiometer is adjusted to desired temperature.L.6 VAC (normally 13 to 14 VAC) with a center tap. it drives both the reducer gearbox and the tach. Ignition should now occur. CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT TRANSFORMER (12. P2. and P3 varying the DC voltage to the motor. 1. Black conductor is Hot Red conductor is Neutral Green conductor is Ground When the temperature in the Control Box reaches 120°F + 3°.50HZ . supplying 24 VAC to the Gas Control Valve. to the Temperature Control Board. The voltage from each leg of the Transformer's secondary to the center tap should be one half of the secondary voltage. 1200 series S/N Q14974 & Above. and supplies power to the Time/Temp Display. 1200 series S/N Q14973 & Below. When the relay contacts close. The Thermocouple will provide varying millivolts to the Temperature Controller. The Transformer steps the voltage down to 12.240V . The Thermostat will interrupt power to the Cooling Fan when the Control Box temperature falls to 100°F + 3°.L. normally 13 to 14 VAC (depending on input).6 volt Transformer.International 11 . and 3 of the Time/Temp.2. Impinger I -–1000 Series Service Manual . The thermistor outputs a resistance proportional to the oven temperature. The speed side of the Time/Temp. Display is energized when the Fan Switch is closed. 1000 series) (S/N Q14791 & Above. 9) The Time/Temp. supplying 120 VAC to the primary of the12. 1200 series S/N Q14973 & Below. with a center tap. This resistance is then converted by the display into a temperature reading. The temperature portion of the display uses a Thermistor Probe to sense oven temperature. Display uses a slotted disc (cemented to tach. The display converts these pulses into a read-out of minutes and seconds. coupling) to break the infra-red light beam of the optical switch (mounted on gear motor) producing electrical pulses that are transmitted to the display. is supplied to terminals 1. The display works on a balanced input and center tap voltage to each leg must be 1/2 the total reading.TIME/TEMP DISPLAY(S/N Q14790 & Below. The center tap is terminal 2. 1200 series S/N Q14974 & Above. Display. 1000 series refer to Pg. The secondary output of the transformer. SCHEMATIC / 1002.International . 1003 12 Impinger I -–1000 Series Service Manual . International 13 .SCHEMATIC / 1006 TO SERIAL NUMBERS Q14279 Impinger I -–1000 Series Service Manual . International . S/N Q19071 & BELOW 14 Impinger I -–1000 Series Service Manual .SCHEMATIC / 1028. 1029. SCHEMATIC / 1028. 1029. S/N Q19078 & ABOVE Impinger I -–1000 Series Service Manual .International 15 . TO S/N Q17170 16 Impinger I -–1000 Series Service Manual .International .SCHEMATIC / 1030. S/N Q17171 & ABOVE Impinger I -–1000 Series Service Manual .International 17 .SCHEMATIC / 1030. S/N Q19077 & BELOW 18 Impinger I -–1000 Series Service Manual .International .SCHEMATIC / 1032. S/N Q19078 & ABOVE Impinger I -–1000 Series Service Manual .SCHEMATIC / 1032.International 19 . SCHEMATIC / 1033. 1034. 1047 20 Impinger I -–1000 Series Service Manual . 1046.International . SCHEMATIC / 1042. S/N Q14279 & BELOW Impinger I -–1000 Series Service Manual .International 21 . 1043. International . S/N Q14280 & ABOVE 22 Impinger I -–1000 Series Service Manual . 1043.SCHEMATIC / 1042. SCHEMATIC / 1228. S/N Q14790 & BELOW Impinger I -–1000 Series Service Manual .International 23 . 1229. S/N Q14791 & ABOVE 24 Impinger I -–1000 Series Service Manual .SCHEMATIC / 1228. 1229.International . International 25 .SCHEMATIC / 1242. 1243 Impinger I -–1000 Series Service Manual . replace transformer. With cooling fan thermostat pre-heated. WITH POWER OFF: Turn Fan Blade to check for locked rotor. Oven Fan Fuse(s) Fuse Holder Fan Switch Main Relay Fan Motor No Main Fan Cool Down Capacitor Cool Down Thermostat No Control Box Cooling(For ovens equipped with Control Box Cooling Fan) Main Fan Relay (Export Ovens) Axial Cooling Fan NOTE: No automatic control box cooling (For ovens equipped with control box cooling fan) Incoming Power Supply Cooling Fan Thermostat Axial Cooling Fan Control box cooling fan continues to run Transformer. Visually check for contact pull-in. Check cooling fan thermostat (thermostat closes at 120°F and opens at 100°F). refer to "Oven fan will not run". Visually check for contact pull in. Check breakers/Reset if needed. Check for 208/240 VAC to relay terminals. See "Cooling Fan Thermostat" Check for adequate gas supply to oven. If not. With the cool down thermostat pre-heated. check for continuity. the supply voltage for the cooling fan is 240 VAC. 24 VAC Cooling Fan Thermostat Check for 120 VAC to primary of transformer. Check to see that manual shut-off valve is open. Check if main oven fan is operating. If 120 VAC is present at the fan motor and the fan does not run. Check for power (120 VAC) to cooling fan. if needed. if present and fan does not run.) WITH POWER OFF: check for locked rotor. For some export ovens. Check for opens. Check for 24 VAC from secondary of transformer. Check for power (120 VAC) at cool down thermostat. shorts. Check cool down thermostat (thermostat closes at 160°F and opens at 140°F). Check for power to relay coil (120 VAC). If main fan will not run. shorts. replace fan. Page 26. Check for opens. replace fan assembly. Check for incoming power (120 VAC)at cooling fan thermostat. check for continuity. there is a control circuit step-down transformer. the secondary of this transformer must be checked for 120 VAC output. replace. Check specific oven model schematic for circuit location. If switch is open.TROUBLESHOOTING GUIDE 1000 & 1200 / GAS OVENS SYMPTOM Oven fan will not run NOTE: POSSIBLE CAUSE Incoming Power Supply (Export Ovens) EVALUATION Check breakers/ Reset if required / Call Power Co. If there is primary voltage. Impinger I -–1000 Series Service Manual . but no secondary voltage.International 26 . or grounds. Manual Gas Shut-off Valve Fan Switch Main Oven Fan (For ovens equipped with a control circuit stepdown transformer. Check continuity to 120 VAC coil. This transformer steps down supply voltage to 120 VAC. If switch is open. Check for 120 VAC to cooling fan. Check and/or Replace Check and/or Replace Check continuity between switch terminals. Check to see that fan switch is "on". replace. Check for power to Main Fan Relay. or grounds. For oven models 1004 and 1005. WITH POWER OFF: turn blower wheel to check for locked rotor. If voltage present on one side only. If there is gas pressure at the pilot tube. Spark should jump the 1/8" gap. check for air tube blockage. visually check for pilot flame.) If there is visible damage.) Check for gas pressure at pilot tube. Check to see that pilot shut-off valve is open (shutoff valve is located between ignition control and valve assembly and burner. also check for frayed or broken wire. replace air pressure switch. check the following.Burner Switch Air Pressure Switch Check for 120 VAC to neutral on both sides of switch. and the pilot valve (internal to valve assembly) and ignitor circuits are energized. Place female terminal of ignitor lead approximately 1/8" from terminal post on ignition control. If the burner blower motor is running and there is no voltage at pin 6 and the ground bar on the ignition control valve. any type of damage to spark gap (. but no burner motor relay action. Replace as necessary. See Pg. If 120 VAC is present and motor does not run.5 m. check fuse and fuse holder. replace the burner blower motor. check the pilot orifice for obstructions. check for blockage in pilot tube or pilot shut-off valve. If switch is closed and 120 VAC is present on one side only. If these are clear. Delete burner motor relay refer to page 55. replace electronic control package. Check for 120 VAC on both sides of switch. check for 24 VAC across pin #1 and the ground bar (pilot valve). Adjust air switch.100 in. Check for 120 VAC supply to burner blower motor. replace ignitor assembly. or by opening the main oven door and looking under the lower finger housings on the right side of the oven. Check for 24 VAC supply to the ignition control and valve assembly at pin 6 and the ground bar. If no pilot flame is visible. To check. If the pilot valve is energized. 28) Ignition Control and Valve Assembly No Pilot Pilot Shut-off Valve Pilot Tube Pilot Orifice Burner Ignitor Impinger I -–1000 Series Service Manual . check for 24 VAC at pin 6 and the ground bar on ignition control and valve assembly. Replace as need Check the burner ignitor head for any obstructions. 2. If voltage is not present. 27 NOTE: (Model 1004 & 1005) Burner Motor Relay Burner Blower Motor Centrifugal Switch of Burner Blower Motor For ovens with Johnson Controls Ignition Control (For ovens with Honeywell Ignition control. replace the switch. If voltage is present. If no gas pressure is present. replace ignition control. If above fails. Check for 24 VAC output from secondary of transformer. If no spark is present. and there is gas supplied to the oven. If the ignition control is supplied with 24 VAC. disconnect the ignitor lead from the bottom of ignition control.m. If voltage is present. replace motor. replace the ignition control and valve assembly. This may be done by opening the small inspection door on the end of the burner.International . check to see that the high voltage ignitor circuit is also energized. If there is 24 VAC output from the transformer. Disconnect pilot tube at burner and connect manometer to pilot tube. there is a 1 Amp fuse located between the 24 VAC output from the transformer and the coil of the burner motor relay. If no spark is present. visually check for pilot flame.C. check for blockage in pilot tube or pilot shut-off valve. If the Burner Blower Motor is running and there is no voltage at terminals 24V and 24V gnd on the ignition control. If no gas pressure is present. replace ignition control and valve assembly. If no pilot flame is visible. Disconnect pilot tube at burner and connect manometer to pilot tube. current at terminal #4. wait 30 seconds and re-try ignition. check for 24V at terminal "P. Impinger I -–1000 Series Service Manual . the current readings should be as follows: Johnson G-65 control. Spark should jump the 1/8" gap. replace ignition control. Check for 24 VAC supply to ignition control at terminals "24V" and "24V gnd". minimum. disconnect the ignitor lead from the ignition control.C. NOTE: This is a current measurement and the meter must be connected in series. replace the Burner Blower Motor. If no gas is present. This procedure is for checking the pilot flame only.7 micro amp. D. Replace as needed. Check for 24 VAC output from secondary of transformer.V. To check.) To check for proper flame sensor operation. Connect a manometer to the manifold gas pressure tap located on the back side of the ignition control and valve assembly.2 micro amp. 0. replace Ignition Control. replace flame sensor. check for 24 VAC that the main valve (internal to valve assembly) has opened. These Ignition Controls have a 30 second prepurge(Delay) and a 15 second lock-out time – The Ignition Control will try for ignition for 15 seconds and then shut-off. Remove main valve wire (Red) from terminal #3 on ignition control. With a visible pilot flame. check for 24 VAC at terminals marked "24V" and "24V gnd" on Ignition Control. or by opening the main oven door and looking under the lower finger housing in the right side of the oven. If the pilot valve is energized. check the pilot orifice for obstructions. If there is gas pressure at the pilot tube. If these values are not achieved.Pilot flame but no main flame Flame Sensor Ignition Control and Valve Assembly For ovens with Honeywell ignition control Centrifugal Switch of Burner Blower Motor NOTE: Ignition Control No Pilot Pilot Shut-off Valve Pilot Tube Pilot Orifice 28 (There should be a visible pilot flame at this time. Also check for any type of damage to flame sensor wire and connections. minimum/Johnson G-60 control. D. (Pilot Valve) and "gnd". microamperes) in series between the flame sensor wire (normally connected to terminal #4) and terminal #4. If the ignition control is supplied with 24 VAC and the pilot valve (in gas valve) and ignitor circuits are energized. To Re-try for ignition.International . If voltage is not present. Check for gas pressure at pilot tube. turn off burner switch. check to see that the high voltage ignitor circuit is also energized. C. If there is a pilot flame. Place the terminal of ignitor lead approximately 1/8" from terminal post on Ignition Control. If voltage is present. connect a digital multimeter (capable of measuring D. and there is sufficient micro amp. check to see that the pilot shut-off valve is open (shut-off valve is located between gas valve and burner). If voltage is present. This may be done by opening the small inspection door on the end of the burner. 0. replace the thermostat) temperature control. the potentiometer is internal to temperature control. Light#3 in 24VAC Burner Transformer Secondary.V/ P. Pilot flame but no main Spark Ignitor (Flame Sensor) (There should be a visible pilot flame at this time). also check for frayed or broken wire. Light#2 attached after 120VAC contacts of Burner Motor Relay (or. terminals. . Temperature Control Check for 120 VAC across L1 and L2on (For ovens with Potentiometer temperature control board. . verify that the main valve has opened. If there is no mechanical blockage to the main orifice. the reading should be 1000 ohms steady throughout the full turn of the dial. any type of damage to spark gap (. replace ignition control.V. a series of test lights may be made and installed in the ovens. check for opens and shorts in coil. check for 24 VAC across M.M. check for voltage at solenoid valve." and "L2".M. For continuing intermittent problems. Refer to chart on page 59 in the adjustment section for proper readings. If the above checks OK. Red Indicator Light is Temperature Control Valve Check for gas supply at temperature control. Temperature Control Turn temperature control dial to full "on" position. This can cause the units to cycle on and off intermittently. refer to Bulletin #028 for Relay Removal). listen for valve to open and close. 2.V./P.1 turn) WITH POWER OFF: check ohms Temperature Control) across red and black leads. Also. From green to red. the ohm reading should be 0 to1000 ohms as the dial is turned.100 in.. Potentiometer (1000 Electronic ohm. replace control. flame(For ovens with Main Orifice Check for blockage of main orifice. The lights should be connected in the following manner: Light#l attached in 120VAC line after Air Pressure Switch. Thermocouple Probe Remove thermocouple leads from the temperature control board.V.5 mm) If there is visible damage. but no main (Robert Shaw) for temperature control set above 300°F.Check the burner ignitor head for any obstructions. If solenoid valve is defective. If spark stops when pilot is lit. Also. If voltage is present at terminals M.O. If voltage is present. Proceed to next component.V. check for proper ground connections at Ignition Control.V." and "L2". replace ignition control. If spark continues. replace Intermittent Heating Both the main fan motor and burner blower motor are equipped with thermo-protection and will cease to operate when not cooled properly. Impinger I -–1000 Series Service Manual . If no gas is present. NOTE: Ovens S/N Q18037 and above. Measure for 120 VAC across terminals "N. Check pilot orifice for any partial blockage. if voltage is not present.O. The lights will allow the customer to advise the service technician a trouble code when the oven fails.International Burner Ignitor 29 . Check on. the indicator light on the control panel should be on. Solenoid Valve If voltage is present at terminals "N. if voltage is not present. replace gas valve. and measure the millivolt output of these leads. flame NOTE: The Honeywell Ignition Control uses the spark ignitor as the flame sensor. replace ignitor assembly. connect manometer to manifold gas pressure tap (located on the back side of the gas valve). most of the problems listed under "oven will not heat" can cause intermittent failures. CODE: All lights off . Flame Sensor bad. . 1 on 2 on 3 on 4 on 5 off 6 off .Light#4 in 24VAC at terminal #6 of Johnson control valve or "24V" on Honeywell Control. or Gas Valve bad.Temperature Control bad. Pilot . Light#6 in 24VAC at terminal #3 of Johnson control valve or "MV" on Honeywell Control. 1 on 2 off 3 on 4 off 5 off 6 off .However. Main Orifice would not be intermittent problem.Unit still not working Main Orifice plugged. 1 on 2 on 3 on 4 off 5 off 6 off .lights of main power. .Burner Motor Relay bad. 30 Impinger I -–1000 Series Service Manual .International . 1 on 2 on 3 on 4 on 5 on 6 on .Burner Motor Centrifugal Switch bad. main fan off. 1 on 2 on 3 on 4 on 5 on 6 off .Pilot Shield missing or warped. air pressure switch out. Light#5 in 24VAC at terminal #1 of Johnson control valve or "PV" on Honeywell Control.Ignition Control bad. Gas Valve bad.Orifice plugged. Air Pressure Switch Check for 220 VAC on both side of switch. adjust air pressure switch. Ignition Control Check for 220 VAC supply to ignition control at pin #1 and neutral.SYMPTION Oven will not heat Model 1030 . replace switch . f voltage is present. replace air pressure switch. If no voltage is present. Burner Motor Relay Check for continuity to 220 VAC coil. NOTE: For Honeywell control only." as the Pressure Switch air pressure switch closes. Visually check for contact pull-in. If voltage present on one side only. Check for air tube blockage or misalignment. If above checks okay. WITH POWER OFF: turn blower wheel to check for locked rotor. check reset button on ignition control. replace ignition control. replace ignition control. If voltage is present on one side of switch only. If switch is closed. If voltage is not present. (See Adjustment Section for location) If the above checks okay. Gas Pressure Switch (internal Check for 220 VAC to neutral on both sides of to gas valve) switch. If 120 VAC is present and motor does not run. but switch still not closed. Should be set at 8. Impinger I -–1000 Series Service Manual . replace air pressure switch. If not. Spark Generator After a pre-purge time of 30 to 60 seconds after blower motor starts. Check for 220 VAC at pin #6 to neutral. Check for power to relay coil (220 VAC). 23 L.. If above fails. visually check for spark at ignitor head.International 31 . Burner Blower Motor Air Check for 220 VAC switching to pin "N. replace motor. replace hi-limit thermostat. If voltage is still not present. Check for proper gas pressure supply to gas valve. retrace wiring back to hi-limit thermostat. Check to Shut-Off Valve see that manual shut-off valve is open.O. wait 30 seconds and check reset button.0 Town Gas. check the following.8 Nat. If voltage present. (Power to burner motor relay)." on ignition control (to bypass air switch). Connect a temporary jumper wire (for testing purposes only) from pin "C" to pin "N. proceed. Burner Blower Motor Check for 120 VAC supply to burner blower motor. check for air tube blockage or misalignment adjust air switch. 2.P. If thermostat will not hold for maximum oven temperature. (Marked on oven spec plate) Check for proper adjustment of gas pressure switch.O.1031 POSSIBLE CAUSE EVUALATION Gas Supply Manual Gas Check for adequate gas supply to oven. Check for 120 VAC to relay contact terminals. refer to "Oven fan will not run. If above fails. and oven is not exceeding temperature dial setting. If voltage is not present. replace gas valve. Check gas filter in gas valve for blockage or damage. reset and test oven for proper operation. and 220 VAC is present on one side only. If open. If the above fails. check for proper location of capillary bulb in its spring holder. Hi-Limit Thermostat Terminals are normally closed. Fan Switch Check to see that the fan switch is on Main Oven Fan Check if main oven fan is operating." Burner Switch Check for 220 VAC to neutral on both sides of switch. check for 220 VAC to spark generator. for Honeywell. 3 micro amp for Landis & Gyr minimum. check for any obstructions in bypass orifice (drilled port through wall inside solenoid valve). proceed as follows: If 120 VAC is present and unit is not heating. If no voltage present. and no spark. From black to red leads the reading should be 2. Ignition Control If there is sufficient flame sensor current. If these readings are not achieved. but the burner will not remain ignited.C. replace the spark generator. replace ignitor/sensor assembly. If output voltage is present at temperature control board.) To check for flame sensor operation. Check for 220 VAC supply to gas valve. replace ignition control. Turn the temperature adjustment knob to the maximum temperature position and check for 120 VAC at the load terminal to neutral. If the thermocouple probe and the control potentiometer check good. D. replace it. replace If all above are operating properly. Refer to chart on page 59 for proper readings. If 120 VAC is not present. NOTE: this is a current measurement and the meter must be connected in series. Check for 120 VAC across L1 and L2 on temperature control board." Remove thermocouple leads from the temperature control board and measure the millivolt output of these leads. if all above are okay. Also check for any type of damage to flame sensor wire and connections. WITH POWER OFF: remove the leads from the temperature control board and measure ohms from black and white leads. If there still is no voltage at gas valve. If there is no visible damage to the components. but burner will not stay ignited Flame Sensor Red indicator light is on but no main flame Temperature Control Thermocouple Probe Temperature Control Potentiometer Solenoid Valve Check for visible damage to ignitor/ sensor assembly. C. If voltage is present. The ohm reading should be 0 to 2. but there is no pilot flame. see "Solenoid Valve. listen for valve to open and close. connect a digital multimeter (capable of measuring D. If there is visible damage to the Ignitor sensor assembly. micro amperes) between the flame sensor wire and terminal "F" on the ignition control or in flame sensor lead for Landis & Gyr. retrace wiring back to power supply. Also check for opens and shorts in coil. check reset button on ignition control.International . then the problem is usually with the temperature control board. check reset button on ignition control. check for voltage at solenoid valve. (There should be a visible pilot flame at this time. If no voltage present. Proper current readings should be between 2 and 4 micro Amp.5K ohms as the dial is turned through its full rotation.Ignitor/Sensor Assembly Gas Valve No Pilot Solenoid Valve Pilot flame. check all connections for tightness. 32 Impinger I -–1000 Series Service Manual .5K ohms and remain steady throughout the full rotation of the dial. Also check for frayed or damaged wires in burner tube. Replace as needed. check breakers.C. S2. Check and/or Replace See procedure for checking on page 26. If this voltage is not present.D. This is a 0 to 400 ohm or 0 to 500 ohm. This ohm reading should be a steady 400-ohm. Check incoming voltage supply at line 1 to neutral. C. Replace as needed. Check for D. check the D. white. Motor Control Board Speed Control Potentiometer Reversing Switch Conveyor Drive Motor Conveyor will not run (S/N 4390 to Q14974 1000 Series S/N 4390-Q14790 1200 Series) Voltage Supply 3 Amp Fuse Fuseholder Fan Switch Conveyor Switch (Dual Belt Ovens) NOTE: Both the main fan motor and burner blower motor are equipped with thermal protection and will cease to operate if overheating occurs. 10-turn potentiometer.International 33 . C. If motor does not run. check the red and black motor leads for opens. There should be a voltage reading of 120 VAC. replace. except that the dual belt ovens use one each of the following: one "A" DC. Check the brushes for excessive or abnormal wear. 125 VDC at maximum conveyor motor speed). This may be caused by improper ventilation. There should be a voltage reading of 120 VAC. Check for 120 VAC input to D. if potentiometer is defective. Replace if defective. reversing switch. C. If not present. Check incoming voltage supply at line 1 to neutral. voltage output from the motor control board. C. If not present. is rotated.P. voltage at terminal F1 and F2. Impinger I -–1000 Series Service Manual . Check and/or Replace. or 500-ohm. control board. should be 0-400 or 0500 ohms as the pot. Same procedure as for fan switch. The trouble shooting procedures are the same as single belt ovens. voltage output to the motor across terminals A1 and A2 (this voltage should be approx. This conveyor fuse is located on the front panel. through the entire 10-turn rotation of the potentiometer. but the conveyor drive motor is not running. If the potentiometer checks OK. Check for D. replace. check breakers. control board and one "B" D. C control board.T. Also most of the problems listed under "oven will not heat" can cause intermittent failure. Check the 3 amp fuse on the D. Dual belt ovens utilize 2 complete independent conveyor drive systems. and there is no output at terminals A1 and A2. If there is D. Test for operation. shorts or grounds. This can cause the units to cycle on and off intermittently. and black leads from terminals S1. With a digital multimeter. Reconnect motor. Red to white.C. WITH POWER OFF: remove the red. Disconnect the motor. Replace if defective. Check for shorts or opens or unsteady. Check the conveyor drive sprocket for tightness. This conveyor fuse is located on the front panel. ohm reading. replace D. C. control board.Intermittent heating As Follows Conveyor will not run (S/N 100-4389) Voltage Supply 3 Amp Fuse Fuse Holder Conveyor Switch D. Same procedure as for fan switch. control board across L1 and L2. C. check the ohm reading across the red to black leads. replace the D. S3. control board. Voltage should be 100 VDC ± 10 steady. check the conveyor switch and wiring back to 3 amp fuse and then back to power source if necessary. Place the meter leads on the red lead (P3) and on the white lead (P2). This reading should be 5 K ohms ± 5% as the pot is rotated from low to high. If 120 VAC is present at L1 and L2. slowly. Remove dust cover from the top of the motor and rotate motor shaft to determine if there is a locked rotor or a locked gear box (use care so encoder disc is not damaged). check the 4 amp and the 1 amp fuses on the control board. irregular speed. Check for any mechanical miss-alignment or improper adjustment. With power off. Refer to the next possible cause. replace the pot.International .Speed Adjustment Potentiometer DC Motor Control Board Conveyor Gear Motor Conveyor Conveyor speed varying or intermittent Power Supply This is a 0 to 5 K ohm. Check all three leads to ground. remove the red. from low to high. If 120 VAC is present at terminals L1 and L2. Check for 120 VAC input to the control board at terminals L1 and L2. and each lead to ground.and the motor does not run. check the VDC output at terminals A+ and A-. There should be no continuity to ground. Rotating the pot. The Installation and Operations Manual shows proper conveyor belt adjustment. and P3. first check the mini breaker and then the conveyor. 34 Impinger I -–1000 Series Service Manual . but DC voltage is not present at A+ and A-. If any of the above checks fail. Also check for worn bearings. A conveyor belt that is over tightened will cause excessive bearing wear and sometimes. providing the 1 amp and 4 amp fuses are good. but motor does not run. If the motor fails the above tests. Check the leads to the motor for evidence of any shorts or opens. If a DC voltage is not present. 10 turn potentiometer. replace the board. Check power supply at the DC control board for the 120 VAC at board terminals L1 and L2.P2. replace motor. check main circuit breakers. If DC voltage is present at A+ and A-. If not present. the meter reading should show an even transition from 0 to 5 K ohms ± 5%. If DC voltage is present at A+ and A. check gear motor as follows. black and white pot leads from the motor control board at terminals P1. check the ohm reading across the red lead (P3) to the black lead (P1). There should be no dead or open spots through out the 10 turns of the pot. If voltage is not present. With a digital multimeter. See procedure for board adjustment on page 65. However. Check for 120 VAC supply to primary of transformer. replace if necessary. Check incoming voltage supply at Line 1 to neutral. If the tach. If the board voltage output is unsteady beyond limits. place the test meter probes on terminals A+ and A-. If this reading is not within ± 0. check the coupling for loose set screws or any type of damage.5 VDC. and the board output is steady. the tach. If voltage is present. and the meter reading should be approximately 30 to 35 VDC. Check.2 to 0. if voltage is not present. Check. Always check the speed pot. Place the test leads of a digital meter on the tach leads. Check the motor and gearbox from instruction located on page 34 under "possible cause" listing "Conveyor gear motor". If the coupling checks good.Tach generator and DC Motor Control Board DC Gear motor Conveyor will not run S/N Q14974 & up1000 Series S/N Q14791 & up 1200 Series Voltage Supply With the power to the DC motor control board turned off. voltage is unsteady.International 35 . then the board is probably bad. If the DC control board is steady then the problem may be the motor or gearbox. This reading should be steady within ± 0. Readjustment should always be attempted at least once before replacement. If BOTH secondary voltages are not present. turn power on. is usually bad.3 VDC. be sure it is okay before changing a board or tach. Fan Switch Conveyor Switch Conveyor Fuse (3A) Fuseholder Conveyor Control (Stepper) Transformer See procedure for checking on page 26. replace if necessary. If no voltage is present. remove the leads from terminals T1 and T2. Check the brushes in the motor for excessive arching and/or unusual wear. this test is the best method currently available. This test is not always 100% accurate as this test is not performed at operating speeds. trace wiring back to the fuse holder. check for out-put voltage from the transformer secondary. Impinger I -–1000 Series Service Manual . WITH POWER OFF: Check continuity between switch terminals. replace the transformer. trace wiring back to the fan switch. There should be a voltage reading of 120 VAC. NOTE: this control transformer outputs (2) secondary voltages Red Leads 29 VAC Brown Leads 10 VAC. The meter reading should be approximately 150 to 160 VDC and steady within approximately 2 VDC. Check for 120 VAC to conveyor Switch. Check the switch and replace as needed. refer to the schematic and trace circuit for incoming power failure. Measure the resistance of the thermistor probe. replace conveyor drive(stepper) motor. If you do not get the above secondary readings. Measure the transformer primary for a nominal 120 VAC input. There should be no continuity to ground. There is a 4-amp fuse in each red secondary lead.2 yellow wires.International 36 . which allows either of the optical encoders to be read from a single Time/Temp. These may be jumpered (for test only) to determine if they are defective or intermittent. the meter should show an even transition from 0 to 50k ohms ±5% through the 10-turn rotation of the potentiometer. Inspect the thermistor bulb for its proper location in its spring holder. measurements should be approximately 2 ohms.6 VAC Power Supply NOTE (Dual Belt Ovens) Temp Display out or inaccurate NOTE: Time/Temp displays use two types of temperature sensor. If motor shaft will not turn.Speed Adjustment Potentiometer Conveyor Motor (Stepper)Control Conveyor Drive (Stepper)Motor Time/Temp Display inoperative 12. See chart on page 72 for proper resistance readings. 4-8. If the motor does not run after attempting re-set. Check motor windings.5 to 15 VAC. wait 10 seconds. If voltage is not present at both sets of terminals. To reset.5 to 15 VAC normally. This reading should be 50k ohms ±5% as the potentiometer is rotated through its 10-turn rotation. Display. Check all three leads to ground. check for 2 to 29 VAC across the motor terminal 1 to 2 and 3 to 5 on the conveyor motor control. If any of the above checks fail. terminals 9 and 10. 2-6. NOTE: if the conveyor drive motor becomes jammed or begins to run at an uncontrolled speed. Impinger I -–1000 Series Service Manual . Place your pyrometer thermocouple into the center between fingers T2 and T3 in the oven. turn off the conveyor switch. Recheck secondary output at rear of Time/Temp Display. Terminals 1 to 2 and 2 to 3 should be 1/2 of the reading across 1 to 3. With a digital multimeter. Thermocouple Probe . replace the transformer. Dual belt ovens utilize a double pole double throw switch. 3-7. Thermistor Probe . Terminals 1 to 3 should read 12. WITH POWER OFF: Turn the motor shaft to check for jammed gear box. replace the potentiometer. Measure the secondary voltage output which will be 12. from low to high. the conveyor motor will stop running. Rotating the potentiometer slowly. turn the conveyor switch on. check the ohm reading across the red lead to the black lead. Terminal 1-5. Check for shorts in leads where they enter the sensor bulb. replace control.1 red wire and 1 white wire Thermistor Probe This is a 0 to 50k ohm. If 120 VAC primary voltage is not available. Disconnect the yellow tipped thermistor leads from the time/temp. WITH POWER OFF: remove the 3-pin potentiometer cable plug from the motor control board. Check the drive sprocket on motor output shaft to insure that is tight. Also check each thermistor lead for short to ground. 10 turn potentiometer. There should be no dead or open spots through the 10 turns of the potentiometer. Place the meter leads on the red lead and white lead. After completion of this test and if reinstalling back into the oven. The disc should not be touching the optical encoder assembly and the encoder assembly should be mounted so it is squarely facing the coupling shaft.International 37 . or if display stays on. The coupling set screws should be tight and not slipping on the motor shaft or the tach. replace thermocouple probe. replace time/temp display. See thermocouple chart on page 59 for proper readings. If the readings do not match. Perform all checks as in the above evaluation. If the time check is okay. If all this is okay. remove all the leads from the back of the display except the 3 power leads. This is to allow the infrared beams to be broken by the encoder disc. refer to the next section optical encoder. Remove dust cover from the gearmotor and inspect the coupling and encoder disc.6 VAC transformer to the display. or inoperative Time display inaccurate erratic. then replace the optical encoder assembly. Replace thermocouple if proper readings not achieved. If readings are correct on the thermocouple. lock up at a given number. Refer to page 72 for instructions. (older models) circuit breaker interruption may be required. If strange or unusual behavior is experienced such as a rolling of numbers. To eliminate this condition remove power from the time/temp.C. The above time/temp test should have already been performed. first check for a display circuit lock up. jumper the two fuses in the red wires leading from the 12. the thermistor probe check. Suggest that customer contact his power company for evaluation. This should eliminate the problem. the dip switches must be reset for oven operation. display by shutting off the main fan switch. Perform the power supply check. millivolts at Thermostat terminals 9 and 10 on the time/temp display. If the temperature readings match. For ovens with Mechanical Measure D. Check the positioning of the optical encoder disc. If the problem continues. This can be caused by a voltage spike or surge. when using the time/temp simulator. recalibrate or replace time/temp display. (Be sure to maintain proper polarity on thermocouple connections. or inoperative(S/N Q4615-Q14970) 1000 Series(S/N Q4615Q14790) 1200 Series Optical Encoder Place your pyrometer thermocouple into the center between fingers T2 and T3 in the oven. generator shaft. and then perform the time/temp simulator test.Thermocouple Probe For ovens with Electronic Thermostat Erratic time/temp display Temp Display inaccurate erratic. Remember. it may be coming in through the commercial power lines. The encoder disc should be firmly attached to the coupling and not warped.) Compare actual oven temperature with the readings at the time/temp display. Connect temperature meter to thermocouple at terminals 9 & 10 on back of the time/temp display. Impinger I -–1000 Series Service Manual . If this does not solve the problem. reconnect original conveyor drive control. wire in (temporarily) a new conveyor drive control. Check all wiring and connections for damage. Replace as needed.International . erratic. Check to see if the conveyor drive (stepper) motor is running. refer to "Conveyor will not run" on Page 35. 38 Impinger I -–1000 Series Service Manual . Check to insure that the magnet (cemented to shaft of conveyor drive (stepper) motor) has not been damaged. If there is still no time display. Replace as needed. or come loose from motor shaft. Replace Hall Effect Sensor. If the time check is ok. refer to the next section. If there is still no time display.Time Display inaccurate. If motor is not running. or inoperative(S/N Q14975 & Above1000 Series) (S/N Q14791 & Above1200 Series) Conveyor Drive (Stepper) Motor Magnet Conveyor Drive (Stepper)Control Perform all check as in the above evaluation. Hall Effect Sensor Check for any physical damage to Hall Effect sensor(mounted on conveyor drive(stepper)motor). Check all connections for tightness or proper location and check all wiring for visible damage. With cool down thermostat pre-heated. reset and test oven for proper operation. Check for power to the relay coil (120 VAC). If above fails. Check specific oven model schematic for circuit location. Check for power (120 VAC) at cool down thermostat. Check for power to main fan relay. WITH POWER OFF: turn the fan blade to check for locked rotor. refer to "Oven fan will not run. check for continuity. If switch is open. Visually check for contact pull-in Check for opens." Check for continuity between switch terminals with switch on. Check cool down thermostat (thermostat closes at 160°F and opens at 140°F). and oven is not exceeding temperature dial setting. Check for opens. adjust air switch. If thermostat will not hold for maximum oven temperature. and oven is not exceeding temperature dial setting. Check and/or Replace Check and/or Replace Check continuity between switch terminals. Check for power (120 VAC) to cooling fan. If 120 VAC is present at the fan motor and the fan does not run.TROUBLESHOOTING GUIDE 1000 & 1200 SERIES / ELECTRIC OVENS SYMPTOM Oven fan will not run NOTE: POSSIBLE CAUSE Incoming Power Supply (Export Ovens) EVALUATION Check breakers/Reset if required/ Call Power Co. For some export ovens. replace fan assembly. Replace the thermostat. replace thermostat (rated at 190°F). If thermostat will not hold for maximum oven temperature. Check for proper location of sensing bulb in its spring holder. If main fan will not run. replace (rated for 368°C). if needed. Check for 208/220/240 VAC to relay terminals. If voltage present on one side only. If open. If not. Terminals are normally closed. Terminals are normally closed. shorts. or grounds. shorts. or grounds. Check if main oven fan is operating.WITH POWER OFF: Turn Fan Blade to check for locked rotor. check for air tube blockage. replace air pressure switch. Check continuity to 120 VAC coil. If hi-limit is still tripping. Replace if defective. Check and/or Replace Check and/or replace. Visually check for contact pull in. Check for 120 VAC on both sides of switch. replace. If open. This transformer steps down supply voltage to 120 VAC.International 39 . there is a control circuit step-down transformer. Oven Fan Fuse(s) Fuse Holder Fan Switch Main Relay Fan Motor Capacitor Cool Down Thermostat No Main Fan Cool Down No control box cooling Main Fan Relay Axial Cooling Fan Oven will not heat Main Oven Fan Heat Switch Air Pressure Switch Hi Limit Thermostat NOTE: Hi Limit Thermostat (Model 1032) 3 Amp Temperature Control Fuse Fuseholder Impinger I -–1000 Series Service Manual . reset and test oven for proper operation. the secondary of this transformer must be checked for 120 VAC output. 240V . Also check each contactor for proper high voltage input and output. Turn the temperature adjustment dial to the maximum temperature position Check for 120 VAC at coil of mercury contactor(s). voltage output to the motor across terminals A1 and A2 (this voltage should be approx.5K ohm. If all readings are not correct.5 ohms approx. replace the contactor(s). Same procedure as for fan switch. Check for D. Check the 3 amp fuse on the D. C. If this voltage is not present. Check and/or Replace. check breakers.13 ohms approx.8 ohms approx. and measure the millivolt output of the leads. If voltage is present and contactor will not activate. 40 Impinger I -–1000 Series Service Manual . 220V . C. If there is no high voltage input to the mercury contactor(s). check for 120 VAC at coil of mercury contactor(s). If the Amp.Temperature Control Board Temperature Control Potentiometer Thermocouple Probe Mercury Contactor(s) 50 Amp Fuses Heater Elements Oven heats with switch off Mercury Contactor(s) Conveyor will not run (S/N 100-4389) Voltage Supply 3 Amp Fuse Fuse Holder Conveyor Switch D. C. Refer to chart in adjustment section for proper millivolt readings. C. Check for 120 VAC input to D. Next. If not present. C. Check the Amp. There should be a voltage reading of 120 VAC. control board. check wiring from fuse holder to temperature control board. Replace if defective. draw on each hot leg for proper load. control board across L1 and L2.5K ohms as the dial Remove thermocouple leads from the temperature control board. and proper resistance . Potentiometer is 0 to 2. 125 VDC at maximum conveyor motor speed). If voltage is not present. Check for 120 VAC to the contactor coil. The mercury contactor has probably malfunctioned in the closed position. This conveyor fuse is located on the front panel. WITH POWER OFF: remove the leads from the temperature control board terminals 1. Check for D. but there is high voltage at the contactor output. If there is no voltage to the operating coil.10. and 3 and measure ohms from black to white leads. replace elements as needed. short the leads of thermocouple on the temperature control board. Check incoming voltage supply at line 1 to neutral. replace D. If not present. shorts. Check the specifications plate for rating information.9. Motor Control Board Check for 120 VAC input to temperature control board. The element resistance should be as follows: 208V . 2. To check resistance of the elements. draw is low or high. turn off the power! Remove all leads from the elements and use an accurate digital VOM. Voltage should be 10 VDC + 10 steady. C. replace the mercury contactor.International . voltage at terminal F1 and F2. replace temperature control board. If voltage is present proceed. The ohm reading should be 0 to approximately 2. check the 50 amp fuses and replace if necessary. control board. check the individual elements for opens. 10-turn potentiometer. control board. Check incoming voltage supply at line 1 to neutral. replace. through the entire 10-turn rotation of the potentiometer. replace the D. Place the meter leads on the red lead (P3) and on the white lead (P2) Rotating the pot. control board. from low to high. Check and/or Replace. Same procedure as for fan switch. Check the conveyor drive sprocket for tightness. Replace if defective. Impinger I -–1000 Series Service Manual . slowly. and black leads from terminals S1. This ohm reading should be a steady 400-ohm. remove the red. but the conveyor drive motor is not running. Check all three leads to ground. except that the dual belt ovens use one each of the following: one "A" D. S2. replace. if potentiometer is defective. voltage output from the motor control board. check the red and black motor leads for opens. check the ohm reading across the red lead (P3) to the black lead (P1). ohms reading. reversing switch. control board and one "B" D.T. With a digital multimeter. shorts or grounds. There should be no dead or open spots through out the 10 turns of the pot. C. 3 Amp Fuse. If there is D. P2 and P3. WITH POWER OFF: remove the red. There should be no continuity to ground. Disconnect the motor. Check for shorts or opens or unsteady. check the ohm reading across the red to black leads. C. and there is no output at terminals A1 and A2.P. 10 turn potentiometer With power off. Test for operation. This conveyor fuse is located on the front panel. C. If motor does not run.International 41 . With a digital multimeter. or 500-ohm. Replace as needed. If no present. Reconnect motor. Dual belt ovens utilize 2 complete independent conveyor drive systems. S3. If any of the above checks fail. black and white pot leads from the motor control board at terminals P1. the meter reading should show an even transition from O to 5 K ohms ± 5%. check breakers.Speed Control Potentiometer Reversing Switch Conveyor Drive Motor Conveyor will not run(S/N 4390 to Q190771000 Series) (S/N 4390Q147901200 Series) Voltage Supply NOTE: Fuseholder Fan Switch Conveyor Switch (Dual Belt Ovens) Speed Adjustment Potentiometer This is a 0 to 400 ohm or 0 to 500 ohm. The trouble shooting procedures are the same as single belt ovens. This is a 0 to 5 K ohm. C. See procedure for checking on Page 26. check the D. If the potentiometer checks OK. replace the pot. This reading should be 5 K ohms ± 5% as the pot is rotated from low to high.D. Check the brushes for excessive or abnormal wear. There should be a voltage reading of 120 VAC. white. voltage is unsteady.International 42 . If a DC voltage is not present. If the motor fails the above tests. this test is the best method currently available. providing the 1 amp and 4 amp fuses are good. Readjustment should always be attempted at least once before replacement. Be sure it is okay before changing a board or tach. Check the brushes in the motor for excessive arching and/or unusual wear. is usually bad. If the coupling checks good. The Installation and Operations Manual shows proper conveyor belt adjustment. However. If not present.3 VDC. first check the mini breaker and then the conveyor. A conveyor belt that is over tightened will cause excessive bearing wear and sometimes.5 VDC. place the test meter probes on terminals A+ and A-. Also check for worn bearings. If the board voltage output is unsteady beyond limits. If the tach. but motor does not run. check the VDC output at terminals A+ and A-. check the coupling for loose set screws or any type of damage. Also reset and check the mini breaker in the armature line to the gearmotor. Check for any mechanical misalignment or improper adjustment.and the motor does not run. irregular speed. Refer to the next possible cause. If 120 VAC is present at terminals L1 and L2. remove the leads from terminals T1 and T2. but DC voltage is not present at A+ and A-. then the board is probably bad. turn power on.Place the test leads of a digital meter on the tach leads. If the DC control board is steady then the problem may be the motor or gearbox. the tach. Always check the speed pot. If DC voltage is present at A+ and A-. See procedure for board adjustment on page 65. The meter reading should be approximately 150 to 160 VDC and steady within approximately 2 VDC. replace the board.DC Motor Control Board Conveyor Gear Motor Conveyor Conveyor speed varying or intermittent Power Supply Tach generator and DC Motor Control Board DC Gearmotor Check for 120 VAC input to the control board at terminals L1 and L2. replace motor. If DC voltage is present at A+ and A. Check power supply at the DC control board for the 120 VAC at board terminals L1 and L2. check the 4 amp and the 1 amp fuses on the control board. Check the motor and gearbox from instruction located on page 34 under "possible cause" listing "Conveyor gear motor". Remove dust cover from the top of the motor and rotate motor shaft to determine if there is a locked rotor or a locked gearbox (use care so encoder disc is not damaged). This reading should be steady within ± 0. and the meter reading should be approximately 30 to 35 VDC. and each lead to ground. check main circuit breakers. and the board output is steady. This test is not always 100% accurate as this test is not performed at operating speeds. Check the leads to the motor for evidence of any shorts or opens. Impinger I -–1000 Series Service Manual . If 120 VAC is present at L1 and L2. check the conveyor switch and wiring back to 3-amp fuse and then back to power source if necessary. check gear motor as follows. If this reading is not within + 0. With the power to the DC motor control board turned off.2 to 0. If voltage is not present. check for 2-29 VAC across the motor terminals 1 to 2 and 3 to 5 on the conveyor motor control. replace if necessary. If the motor does not run after attempting re-set. if voltage is not present. the meter should show an even transition from 0 to 50K ohms ± 5% through the 10 turn rotation of the potentiometer. from low to high. replace conveyor drive(stepper) motor. Terminal 1-5. Check. See procedure for checking on page 26. check for output voltage from the transformer secondary. With a digital multimeter. replace if necessary. Red Leads 29 VAC Brown Leads 10 VAC If BOTH secondary voltages are not present. 3-7. check the ohm reading across the red lead to the black lead.International 43 . turn the conveyor switch on. Check for 120 VAC supply to primary of transformer. NOTE: this control transformer outputs (2) secondary voltages. WITH POWER OFF: remove the 3 pin potentiometer cable plug from the motor control board. If voltage is present. Check. Check motor windings – measurements should be approximately 2 ohms. replace the potentiometer. If no voltage is present. This is a 0 to 50k ohm. If motor shaft will not turn. There should be a voltage reading of 120 VAC.10 turn potentiometer. Rotating the potentiometer slowly. If any of the above checks fail. replace the transformer.. Check all three leads to ground. NOTE: if the conveyor drive motor becomes jammed or begins to run at an uncontrolled speed. There should be no continuity to ground. Check for 120 VAC to conveyor switch. WITH POWER OFF: Check continuity between switch terminals. 2-6. trace wiring back to the fan switch. There should be no dead or open spots through the 10 turns of the potentiometer. If voltage is not present at both sets of terminals. 4-8 WITH POWER OFF: Turn the motor shaft to check for jammed gear box. To reset. trace wiring back to the fuse-holder. Impinger I -–1000 Series Service Manual . turn off the conveyor switch. wait 10 seconds. replace control Check the drive sprocket on motor out-put shaft to insure that it is tight. Place the meter leads on the red lead and white lead. the conveyor motor will stop running.Conveyor will not run(S/N Q19078 & Up1000 Series) (S/N Q14791 & Up1200 Series) Voltage Supply Fan Switch Conveyor Switch Conveyor Fuse (3A) Fuseholder Conveyor Control(Stepper) Transformer Speed Adjustment Potentiometer Conveyor Motor(Stepper) Control Conveyor Drive (Stepper) Motor Check incoming voltage supply at Line 1 to neutral. this reading should be 50k ohms ± 5% as the potentiometer is rotated through its 10 turn rotation. Check switch and replace as needed. If this does not solve the problem. lock up at a given number. If 120 VAC primary voltage is not available.5 to 15 VAC normally. Remember. These may be jumpered (for test only) to determine if they are defective or intermittent. recalibrate or replace time/temp display.5 to 15 VAC. This should eliminate the problem. 44 Impinger I -–1000 Series Service Manual . replace thermocouple probe. After completion of this test and if reinstalling back into the oven.6 VAC Power Supply NOTE: (Dual Belt Ovens) Temp Display out or inaccurate NOTE: Time/Temp displays use two types of temperature sensor. If strange or unusual behavior is experienced such as a rolling of numbers. If you do not get the above secondary readings. Connect temperature meter to thermocouple at terminals 9 & 10 on back of the time/temp display (Be sure to maintain proper polarity on thermocouple connections. or if display stays on. Check for short in leads where they enter the sensor bulb. when using the time/temp simulator. Also check each thermistor lead for short to ground. Measure the resistance of the thermistor probe.) Compare actual oven temperature with the reading at the time/temp display. or inoperative Measure the transformer primary inoperative for a nominal 120 VAC input. See chart on page 72 for proper resistance readings.International . Display. Inspect the thermistor bulb for its proper location in its spring holder. replace the transformer. the thermistor probe check. There is a 4 amp fuse in each red secondary lead. Disconnect the yellow tipped thermistor leads from the time/temp. Place your pyrometer thermocouple into the center between fingers T2 and T3 in the oven. Recheck secondary output at rear of Time/Temp Display. and then perform the time/temp simulator test. (older models) circuit breaker interruption may be required. Dual belt ovens utilize a double pole double throw switch. Terminals 1 to 2 and 2 to 3 should be exactly 1/2 of the reading across 1 to 3. remove all the leads from the back of the display except the 3 power leads. Perform the power supply check. This can be caused by a voltage spike or surge. it may be coming in through the commercial power lines. refer to the schematic and trace circuit for incoming power failure. To eliminate this condition remove power from the time/temp. If the problem continues. Suggest that customer contact his power company for evaluation. terminals 9 and 10.Time/Temp Display 12. Refer to page 72 for instructions. Measure the secondary voltage output which will be 12. which allows either of the optical encoders to be read from a single Time/Temp. Terminals 1 to 3 should read 12. Place your pyrometer thermocouple into the center between fingers T2 and T3 in the oven. first check for a display circuit lock up. If the temperature readings match. If the readings do not match.6 VAC transformer to the display. jumper the two fuses in the red wires leading from the 12. display by shutting off the main fan switch. the dip switches must be reset for oven operation. Thermistor Probe – 2 yellow wires Thermocouple Probe 1 red wire and 1 white wire Thermistor Probe Thermocouple Probe Erratic time/temp display Temp Display inaccurate erratic. reconnect original conveyor drive control. If the time check is okay. wire in (temporarily) a new conveyor drive control. If there is still no time display. Check all connections for tightness or proper location and check all wiring for visible damage. Replace as needed. Check for any physical damage to Hall Effect sensor (mounted on conveyor drive(stepper) motor). Perform all checks as in the above evaluation. refer to the next section optical encoder. then replace the optical encoder assembly. The coupling set screws should be tight and not slipping on the motor shaft or the tach. Impinger I -–1000 Series Service Manual . or come loose from motor shaft. The disc should not be touching the optical encoder assembly and the encoder assembly should be mounted so it is squarely facing the coupling shaft. or inoperative Optical Encoder Time Display inaccurate. or inoperative(S/N Q19078 & Above1000 Series) (S/N Q14791 & Above1200 Series) Conveyor Drive (Stepper) Control Magnet Hall Effect Sensor Conveyor Drive (Stepper) Control Perform all checks as in the above evaluation. Replace as needed. The encoder disc should be firmly attached to the coupling and not warped. Check all wiring and connections for damage. generator shaft. This is to allow the infrared beams to be broken by the encoder disc. Remove dust cover from the gearmotor and inspect the coupling and encoder disc. If all this is okay. Check to see if the conveyor drive (stepper) motor is running. If there is still no time display.Time display inaccurate erratic. refer to "Conveyor will not run" on page 43. If the time check is okay. erratic. Replace Hall Effect Sensor. Check the positioning of the optical encoder disc. If motor is not running. refer to the next section.International 45 . Check to insure that the magnet (cemented to shaft of conveyor drive (stepper) motor) has not been damaged. The above time/temp test should have already been performed. Check to insure that the contacts are opening after the coil is de-energized. In these ovens. If voltage is not present. If no voltage is present. and the voltage continues at terminal #2 of the 20 minute timer. check to insure the contacts are closing. 1047 SYMPTOM Oven fan will not run POSSIBLE CAUSE Incoming Power Supply EVALUATION Check breaker/reset if required. If voltage is present at terminal #1. Check for opens. If voltage is present at the relay coil. Turn off the main fan switch. Check for opens. If the oven start relay contacts are open. Check for 120 VAC at terminals #2 and 6 of the relay. check motor for shorts. or grounds. If no voltage is present. shorts. Check if relay is operating and that the contacts remain closed during the 20 minute cool down. replace if necessary. If no voltage is present. (SEE MAIN FAN WILL NOT RUN) 120 VAC should now be at this motor. Contacts should open when main fan switch is turned off. Transformer Fuse Fuseholder Fan Switch Oven Start Relay 20 Minute Time Delay Oven Fan Relay Fan Fuse Fuseholder Capacitor Motor No main fan cool down 20 Minute Time Delay Oven Fan Relay Main fan runs after 20 minute cool down Oven Start Relay 20 Minute Time Delay Oven Fan Relay No control box cooling Fan Switch Oven Start Relay20 Minute Time Delay Oven Fan Relay Cooling Fans 46 Impinger I -–1000 Series Service Manual . If voltage is present. Check. Check for 120 VAC to the relay coil. or grounds. trace wiring back to terminal #2 of the 20-minute timer. if no voltage is present. Check continuity between switch terminals. If voltage is not present for approx. trace wiring back to the fan switch. If main fan will not run. Check. 20 minutes. Check specific oven model schematic for circuit location. trace wiring back to the power supply. replace the timer. check for 120 VAC at terminal #2 to neutral. This transformer steps down supply voltage to 120 VAC. or grounds. Call Power Company if needed. the secondary of this transformer must be checked for 120 VAC output. opens. 1046. Check and/or replace. there is a control circuit step-down transformer.TROUBLESHOOTING / GAS OVENS 1033. replace the 20minute timer. Check for 120 VAC to coil of the oven fan relay. If voltage is present. check to insure contacts are closing. WITH POWER OFF: turn the fan blade to check for locked rotor. shorts. WITH POWER OFF: check for locked rotor. replace the timer.International . 1034. 120 VAC should continue to be present for 20 minutes. trace wiring back to the power supply. 120 VAC at terminal #2 should discontinue approximately 20 minutes after main fan is switched off. Check for 120 VAC at terminal #1 to neutral on the 20-minute timer. replace if necessary. and the oven start relay is closed. Check and/or replace. Check for 120 VAC at terminal #2 to neutral while oven is "on". No automatic control box cooling Incoming Power Supply Fuse Transformer Fuseholder Cooling Fan Thermostat Cooling Fan Cooling fan continues to run after 20 minute cool down Oven will not heat Cooling Fan Thermostat Check circuit breakers, reset if required. Call the Power Co. if needed. Check, replace if necessary. Check, replace if necessary. Check the cooling fan thermostat (Thermostat closes at 120°F and opens at 100°F). With the cooling fan thermostat pre-heated, check for continuity. If switch is open, replace. 120 VAC should now be at this motor. If voltage is present, check motor for shorts, opens, or grounds. WITH POWER OFF: check for locked rotor. Thermostat is normally open and may have closed if control box temperature is 120°F or above. Check for adequate gas supply to oven. Check to see that manual shut-off valve is open. Check to see that the fan switch is on. Check if main oven fan is operating. If not, refer to "Oven fan will not run." Check for contacts to close. Check for 220 VAC to neutral on both sides of switch. Check for 220 VAC on both sides of switch. If voltage present on one side only, check for air tube blockage. Adjust air switch. If above fails, replace air pressure switch. Check for 220 VAC to neutral on both sides of switch. If voltage is present on one side of switch only, check the following. Check for proper gas pressure supply to gas valve.(Marked on oven spec plate). Check for proper adjustment of gas pressure switch. Should be set at 8.8 for Nat., 23 for L.P. Check gas filter in gas valve for blockage or damage. (See Adjustment Section for location). If the above checks okay, but switch still not closed, replace gas valve. Terminals are normally closed. If open, reset and test oven for proper operation. If thermostat will not hold for maximum oven temperature, and oven is not exceeding temperature dial setting, check for proper location of capillary bulb in its spring holder. If above checks okay, replace hi-limit thermostat. Check for 220 VAC supply to ignition control at pin #1 and neutral. If voltage is not present, retrace wiring back to hi-limit thermostat. Check for 220 VAC at pin #6 to neutral.(Power to burner motor). If voltage is present, proceed. If no voltage is present, wait 30 seconds and check reset button. If above fails, replace ignition control. Check for 220 VAC supply to burner blower motor. WITH POWER OFF: turn blower wheel to check for locked rotor. If 220 VAC is present and motor does not run, replace motor. Check for 220 VAC switching to pin "N.O." as the air pressure switch closes. For Honeywell ignition control only, connect a temporary jumper wire (for testing purposes only) from pin "C" to pin "N.O." on ignition control (to bypass air switch). Check for air tube blockage or misalignment, adjust air pressure switch. If the above fails, replace air pressure switch. 47 Gas Supply Manual Gas Shut-off Valve Fan Switch Main Oven Fan Oven Start Relay Burner Switch Air Pressure Switch Gas Pressure Switch Hi-Limit Thermostat Ignition Control Burner Blower Motor Burner Blower Motor Air Pressure Switch Impinger I -–1000 Series Service Manual - International Spark Generator Ignitor/Sensor Assembly Gas Valve No Pilot Pilot Tube Pilot Orifice Burner Ignitor Pilot flame, but burner will not stay ignited Flame Sensor Ignition Control Indicator light is on but no main flame, (Model 1046-1047) Gas Control Relay After a pre-purge time of 30 to 60 seconds after blower motor starts, check for 220 VAC to spark generator. If voltage is not present, check reset button on ignition control. If voltage is present, visually check for spark at ignitor head. Check for visible damage to ignitor/sensor assembly. If there is no visible damage to the components, and no spark, replace the spark generator. If there is visible damage to the ignitor sensor assembly, replace. Also check for frayed or damaged wire in burner tube. Check for 220 VAC supply to gas valve. If no voltage present, check reset button on ignition control, check all connections for tightness. If there is no voltage at gas valve, replace ignition control. If there is voltage present, check for gas pressure at gas pressure tap located in gas piping. If there is no gas pressure, replace gas valve. If the ignition control is energized, and the gas valve and ignitor circuits are energized, visually check for pilot flame. This may be done by opening the small inspection door on the end of the burner, or by opening the main oven door and looking under the lower finger housings on the right side of the oven. If no pilot flame is visible, check the following. Check for gas pressure at pilot tube. Disconnect pilot tube at burner and connect manometer to pilot tube. If no gas pressure is present, check for blockage in pilot tube. If these are clear, and there is gas supplied to the oven, replace the gas valve. If there is gas pressure at the pilot tube, check the pilot orifice for obstructions. Replace as needed. Check the burner ignitor head for any obstructions, also check for frayed or broken wire, any type of damage to spark gap (.100 in 2.5 mm).If there is visible damage, replace ignitor assembly. (There should be a visible pilot flame at this time). To check for flame sensor operation, connect a digital multimeter. (Capable of measuring D.C. microamperes) between the flame sensor wire and the ignition control. NOTE: This is current measurement and the meter must be connected in series. Proper current readings should be Honeywell 2-4 micro amp D.C., Landis & Gyr. 3 micro amp D.C. If these readings are not achieved, replace ignitor/sensor assembly. Also check for any type of damage to flame sensor wire and connections. If there is sufficient flame sensor current, but the burner will not remain ignited, check reset button on ignition control. Check for 220 VAC to relay coil. If no voltage is present, trace wiring back to ignition control. If voltage is present, check to insure contacts are closing. 48 Impinger I -–1000 Series Service Manual - International Temperature Control Thermocouple Probe Solenoid Valve Indicator light is on, but no main flame (1033-1034) Temperature Control Thermocouple Probe Flame Monitor Relay, Main Burner Valve, Temperature Regulation Check for 120 VAC across L1 and L2 on temperature control board. If no voltage is present, retrace wiring back to power supply. Turn the temperature adjustment knob to the maximum temperature position and check for 120 VAC at the load terminal to neutral. If 120 VAC is not present, proceed as follows: If 120 VAC is present and unit is not heating, see "Solenoid Valve." Remove thermocouple leads from the temperature control board and measure the millivolt output of these leads. Refer to chart on page 59 for proper readings. If the thermocouple probe checks good, then the problem is usually with the temperature control board. If output voltage is present at temperature control board, check for voltage at solenoid valve. If voltage is present, listen for valve to open and close. Also check for opens, shorts in coil. Replace as needed. Check for 120 VAC across L1 and L2 on temperature control board. If no voltage is present, retrace wiring back to power supply. Turn the temperature adjustment knob to the maximum temperature position and check for 220 VAC at the load terminal to neutral. If 220 VAC is not present, proceed as follows: If 220 VAC is present, and unit is not heating, see "Flame Monitor". Check for 220 VAC at terminal "COM" on temperature control board. If no voltage is present, trace wiring back to ignition control. Remove thermocouple leads from the temperature control board and measure the millivolt output of these leads. Refer to chart on page 59 for proper readings. If the thermocouple probe checks good, replace temperature control. Check for 220 VAC at terminal #1. If no voltage is present, trace wiring back to temperature control. Check for 220 VAC output at terminal #8. NOTE: There is a delay of up to 2 seconds for 220 VAC output at terminal #8. If there is no voltage output at terminal #8, check the reset button. Replace control as needed. Check for 220 VAC at relay coil, if no voltage is present, trace wiring back to flame monitor. Check for 120 VAC to relay contacts. If no voltage is present, trace wiring back to power supply. Check to ensure contacts are closing. Replace relay as needed. Check for 120 VAC at valve, if no voltage is present, trace wiring back to relay. If voltage is present, listen for valve to open and close. Check for opens or shorts in coil. Replace as needed. Impinger I -–1000 Series Service Manual - International 49 Main Flame will not stay lit Flame Monitor Intermittent Heating As Follows Conveyor will not run Conveyor Switch Conveyor Fuse(3A) Fuseholder Conveyor Control Speed Adjustment Potentiometer Conveyor Motor(Stepper) Control (There should be a visible main flame at this time. Check all three leads to ground. D. The flame monitor requires a minimum of 4 micro amp. Also check for any type of damage to flame sensor wire and connections. turn off the conveyor switch. If the reading is above the minimum required. the conveyor motor will stop running. the meter should show an even transition from 0 to 50K ohms ± 5% through the 10 turn rotation of the potentiometer. NOTE: this control transformer outputs (2) secondary voltages: Red Leads 29 VAC Brown Leads 10 VAC. Place the meter leads on the red lead and white lead. WITH POWER OFF: remove the 3 pin potentiometer cable plug from the motor control board. micro amperes) between the flame sensor and terminal #15 on the flame monitor.International .) To check for flame monitor operation. If voltage is not present at both sets of terminals. this reading should be 50K ohms ± 5% as the potentiometer is rotated through its 10 turn rotation. check the ohm reading across the red lead to the black lead. Also. With a digital multimeter. replace control. 50 Impinger I -–1000 Series Service Manual . This can cause the units to cycle on and of intermittently.C. If voltage is present. This is a 0 to 50K ohm. Rotating the potentiometer slowly. check for 2 to 29 VAC across the motor terminals 1 to 2 and 3 to 5 on. If BOTH secondary voltages are not present. To reset. If these readings are not achieved. replace sensor assembly. check for output voltage from the transformer secondary. the conveyor motor control. turn the conveyor switch on. 10 turn potentiometer. There should be no continuity to ground. replace if necessary. if voltage is not present. trace wiring back to the power supply.C. replace the potentiometer. connect a digital volt meter (capable of measuring D. replace if necessary. replace the transformer. If the motor does not run after attempting re-set. trace wiring back to the fuseholder. Both the main fan motor and burner blower motor are equipped with thermal protection and will cease to operate if overheating occurs. There should be no dead or open spots through the 10 turns of the potentiometer. NOTE: if the conveyor drive motor becomes jammed or begins to run at an uncontrolled speed. If any of the above checks fail. wait 30 seconds. WITH POWER OFF: Check continuity between switch terminals Check. Check. from low to high. Check for 120 VAC supply to primary (Stepper) Transformer of transformer. replace the flame monitor. and the flame monitor will not supply 220 VAC to the relay coil. Check for 120 VAC to conveyor switch. for proof of flame. This may be caused by improper ventilation. most of the problems listed under "oven will not heat" can cause intermittent failure. If no voltage is present. or lock-up at a given number. Measure the secondary output. display should read 12-15 VAC. To eliminate this condition. Place your pyrometer thermocouple into the center between fingers T2 and T3 in the oven. replace the time/temp.2. This should eliminate the problem. 2-6. Place your pyrometer thermocouple into the center between finger T2 and T3 in the oven. such as a rolling of numbers. 3-7. If motor shaft will not turn. Connect temperature meter to thermocouple at terminals 9 & 10 on back of the time/temp display. If time/temp. WITH POWER OFF: Turn the motor shaft to check for jammed gear box. If the readings do not match. it may becoming in through the Commercial power lines. If the above secondary readings are not achieved.1 red & one white wire Thermistor Probe Check the drive sprocket on motor output shaft to insure that it is tight. trace wiring back to the oven fan switch. recheck all connections for tightness. This may be caused by a voltage spike or surge in the incoming power lines. display. Voltage across terminals 1 and 3 on the time/temp. and 3 on time/temp. if voltage is not present. If a strange or unusual behavior is experienced. recalibrate or replace time/temp display. If proper voltage is present at terminal 1. Display inoperative 12 VAC Power Supply (Transformer) Time/Temp. remove power from time/temp. Terminals 1-2 and 2-3 should be 1/2 the voltage reading 1 to 3.) Compare actual oven temperature with the reading at the time/temp display. If this does not solve the problem.International 51 . which will normally be 12-15 VAC. Check for short in leads where they enter the sensor bulb. Measure the transformer primary for a nominal 120 VAC input. Disconnect the yellow tipped thermistor leads from the time/temp. display by shutting off the main fan switch for 15 seconds.2 yellow wires. replace thermocouple probe. but the display is not lighted. Thermocouple Probe Power Supply Impinger I -–1000 Series Service Manual . Inspect the thermistor bulb for its proper location in its spring holder. See chart on page 72 for proper resistance readings. If the temperature readings match. display is still not operating. Also check each thermistor lead for short to ground. Thermocouple Probe . Check motor windings measurement should be approximately 2 ohms. Terminals 1-5. Display out or inaccurate NOTE: Time/temp displays use two types of temperature sensor Thermistor Probe . 4-8. Suggest that customer contact their power company for evaluation.Conveyor Drive(Stepper) Motor Time/Temp. Display Temp. replace conveyor drive(stepper) motor. terminals 9 and 10. Measure the resistance of the thermistor probe. (Be sure to maintain proper polarity on thermocouple connections. first check for a display circuit lock-up. display. replace transformer. Replace Hall Effect Sensor. If there is still no time display. Check to see if the conveyor drive (stepper) motor is running. Check to insure that the magnet (cemented to shaft of conveyor drive (stepper) motor) has not been damaged. simulator test. Replace as needed. display must be recalibrated. After completion of the test. and the time/temp. the thermistor probe check. remove all leads from the back of the time/temp. display inaccurate. 52 Impinger I -–1000 Series Service Manual . If the time check is okay.Temp. the dip switches must be reset for oven operation. Check for any physical damage to Hall Effect Sensor(mounted on conveyor drive(stepper)motor. simulator. display back in the oven. erratic or inoperative Conveyor Drive (Stepper) Motor Magnet Hall Effect Sensor Conveyor Drive (Stepper) Control Perform the power supply check. when using the time/temp. If motor is not running refer to "Conveyor will not run" on page 50. Remember. If there is still no time display. or inoperative Time/Temp. replace display. and if re-installing time/temp. refer to the next section. or come loose from motor shaft. Display Time Display inaccurate. and then perform the time/temp. If readings are not achieved. reconnect original conveyor drive control. Check all connections for tightness or proper location and check all wiring for visible damage. erratic. wire in (temporarily) a new conveyor drive control. Replace as needed.) Check all wiring and connections for damage. Perform all checks as in the above evaluation. display except the 3 power leads.International . Refer to page 72 for instructions. Remove two (2) hex head bolts from fan hub and remove fan from motor shaft. MAIN FAN 1. 4. align motor shaft in the center of the hole. Remove heat slinger. When motor mount assembly is set on the oven back. CAPACITOR. torque) 5. N. if so equipped. Remove motor cover from back of oven. Make note of wire numbers and location for reinstallation.REMOVAL. INSTALLATION & ADJUSTMENTS MODEL SERIES 1000 &1200 CAUTION ! BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER OVEN BE SURE TO DISCONNECT ELECTRICAL POWER AND GAS SUPPLY MOTOR. 7. by taking out the two (2) hex head cap screws then remove motor by taking off motor clamp and removing the four (4) mounting nuts and washers. 8. Remove and replace. Remove the eight (8) hex head bolts from the motor mount and slide the motor assembly out of the oven back. Shut off power at main breaker. FAN. (3/8" approximately with 1/16" clearance at motor mount bolts). 3. NOTE: Torque specs on bolts (150 in/lb. Remove junction box cover below motor and disconnect motor leads. Shut off power at main breaker. Remove back assembly. 6. Be sure the heat slinger. Remove wireway by taking out the ten (10) hex head screws.International 53 . NOTE: Measure distance from fan blade to rear wall assembly before removal to aid in reassembly. 2. MOTOR 1. Remove the twelve (12) hex head bolts from the oven back and slide back straight out of the oven . Discharge capacitor. MAIN 1. 4. 9. Remove cooling fan if equipped. 11. Remove flue by taking out the two (2) mounting screws. N. Shut off power at main breaker. 2. Reassemble in reverse order. 100-4612 (GAS) S. is set at the proper clearance. When reassembling trim the motor mount bolts off after the motor is mounted (if required). 10. (See motor. 3. NOTE: On Series 1200 ovens there are two (2) wireways to be removed and there is extra wire coiled in the control box to allow the wires to hang below the oven back for removal. main fan) S. 100-4767 (ELECTRIC) Impinger I -–1000 Series Service Manual . Set fan assembly on the motor shaft . Remove louvered motor cover from back of oven. 2. if so equipped. (See Drawing) S. 2. N. Reassemble in reverse order. check condition of teflon insulator and be sure a aluminum sensing rod contacts the switch body. 4613 & Above (GAS) S. CONTROL BOX 1. Remove control panel top and front cover. 2. Remove four (4) screws from the fan frame. THERMOSTAT. located on the back wall of the control box. Reassemble in reverse order. 4. Disconnect female cord receptacle and remove fan.International . Remove control panel top and front cover. COOL DOWN SWITCH 1. COOLING FAN 3. 5. 3. 3.S. 2. Shut off power at main breaker Remove control panel top and front cover. 6. 2. Remove the two (2) wires from the switch. Reinstall and locate fan so that the front of fan blades are 9 3/4" from inside of oven back. Shut off power at main breaker. COOLING FAN. ± 1/8 IN. Remove relay by removing two (2) mounting screws. COOLING FAN 1. Remove cover from relay box. 3. Remove control panel top and front cover.FAN BLADE 9 3/4 IN.P. N. 1. Disconnect all wires and mark for replacement. Reassemble in reverse order. 5.T. Shut off power at main breaker. Impinger I -–1000 Series Service Manual . 54 Shut off power at main breaker. Reinstall and locate fan so that the bottom of the fan spider is 1 1/2" from the top of the oven back cone (See Drawing) RELAY. Remove two (2) screws from the switch bracket. 5. D. 4. 4768 & Above (ELECTRIC) FAN SPIDER NOTE: MEASUREMENT MUST BE MADE FROM CONE TO FAN SPIDER FAN HUB 1 1/2 INCH CONE 3. 4. Remove two (2) screws and remove thermostat. 5.International 55 . 2. 8. MATERIAL NEEDED: #29 drill bit and #8 x 3/8 self tapping screws (3 each) 3. 4. AIR SWITCH MOUNTING BRACKET MOUNTING HOLES (USE #29 DRILL) #8 X 3/8 SELF TAPPING SCREW SEPARATE GROUND SCREW Impinger I -–1000 Series Service Manual . Remove lead wires and mark for reassembly. Reassemble in reverse order. When It is used in the 3 ft Impinger Gas oven.3. NOTE: Complete burner blower motor assembly. Remove control panel top and front panel. Mount new blower assembly. with control box (p/n 369359). 7. Wire as shown. See page 56. Remove three (3) screws that attach blower assembly to burner housing. 5. the following modification must be made: Remove control box and components mounted on burner blower motor. 6. The burner blower assembly (p/n 369265) has been changed to a burner motor kit (p/n 369366). 9. Mount transformer on air switch bracket as shown (use transformer as template). Transfer air shutter assembly from old blower assembly to new blower assembly. BURNER BLOWER MOTOR 1. Discard control box and relay. is no longer available. Shut off power at main breaker. 4. deactivating air switch causing heat to shut off in approximately 5 to 25 seconds. Turn adjusting screw counterclockwise 1/4 turn and unit should heat. Remove air shutter held by 3 screws. Remove front control compartment cover. Remove main fan fuse. Loosen set screw on blower wheel hub and pull straight out. 7. BURNER This is part of the burner blower motor assembly. 5. Reassemble in reverse order. 8. 2. 4. AIR PRESSURE SWITCH 1. 2. 3.International 56 . Reassemble in reverse order. Turn on power and calibrate air switch as follows: Turn adjusting screw counter clockwise to full out position. Impinger I -–1000 Series Service Manual . Disconnect 1/4" air tube. 6. Remove control panel top and front cover.) WHITE 120 VAC BLACK (BUTTSPLICE CONNECTORS PROVIDED FOR 120 VAC POWER SUPPLY) BLOWER WHEEL. 5. Shut off power at main breaker. Turn adjusting screw clockwise until heat shuts off.MOTOR CENTRIFUGAL SWITCH WIRING DIAGRAM BURNER BLOWER ASSEMBLY WITH RELAY REMOVED RED 24 VAC TO IGNITION CONTROL RED TO GROUND TERMINAL ON IGNITION CONTROL GREEN GROUND 24 VAC TRANSFORMER P/N 369531 (WHEN USING OLD TRANSFORMER. 4. 120 VAC LEADS ARE BLACK. Disconnect wiring and mark for reassembly. WIRE TERMINALS ARE PROVIDED. NOTE: There is no critical placement of the blower wheel on the motor shaft. TO REMOVE THE BLOWER WHEEL FOR PERIODIC CLEANING: 1. 3. Just back as far as it will go and then spin the blower to be sure it is not rubbing. Loosen 2 screws and remove air switch. Shut off power at main breaker. NOTE: Test as follows: Oven must be tested in heated condition. Remove air switch cover plate. Main fan should shut down. Turn main fan and heat switch on. 4. Remove control panel top and front cover. the main and pilot orifice. 5. NAT Gas/10" W. Remove incoming nipple. Shut off gas supply. 7. Remove pilot tube assembly from control valve. Remove control panel top and front cover. flame target. Disconnect wiring from control valve making note of wire numbers and location. Disconnect the gas piping from the back of the unit. Remove control panel top and front panel. 3. Remove the four (4) screws from the incoming nipple mounting bracket. (See Section "MANIFOLD PRESSURE-ADJUSTMENT") NOTE: Check all gas line fittings for leaks after installation. Reassemble in reverse order . 2.International . 8. Shut off power at main breaker. WITH ELECTRIC POWER AND GAS OFF: remove the outlet pressure tap plug from the gas 57 Impinger I -–1000 Series Service Manual . GAS CONTROL VALVE Shut off power at main breaker. Remove gas control valve (See "GAS CONTROL VALVE") Disconnect pilot tube. 9. and burner ignitor can now be changed or serviced as needed. Disconnect pipe union just above control valve. pilot shield (main and extension). Remove four (4) phillips screws that secure the burner backing plate.BURNER ASSEMBLY 1. Reassemble in reverse order.ADJUSTMENT 1. Shut off gas supply. Remove thermostat or solenoid valve.5" W. 2.C. MANIFOLD ADJUSTMENT SCREW LOCATED UNDER COVER SCREW FRONT VIEW MANIFOLD PRESSURE ADJUSTMENT CONNECTION PILOT LINE CONNECTION MANIFOLD ADJUSTMENT SCREW LOCATED UNDER COVER SCREW TOP VIEW MANIFOLD PRESSURE .C. flame sensor. LP) and adjust if necessary. Remove burner assembly from housing.after assembly is complete be sure to check manifold pressure (3. 6. 2.C. TEMPERATURE CONTROL POTENTIOMETER – REPLACEMENT 1. 6. 9. 4. 3. 6.5"W. Remove knob and locknut on control pot. 4. 6. Disconnect wiring from temperature control board. 3. Shut off gas supply. 4. Turn on electric power and gas and start-up oven. replace pressure tap plug. Disconnect wiring from temperature control board. 3. 7. 7. Electric Ovens 1. 6. Reassemble in reverse order. LP). Remove control panel top and front cover. Shut off power at main breaker. 2. shaft and push out. manifold pressure should be (3. Remove control panel top and front cover. TEMPERATURE CONTROL BOARD Gas Ovens 1.C. Disconnect wires from solenoid valve. TEMPERATURE CONTROL VALVE (ROBERT SHAW) 1. 3. Remove gas control valve (See "GAS CONTROL VALVE"). Remove control panel top and front cover. Remove solenoid valve assembly. Remove relay box cover. 5. control valve and install the adapter fitting and manometer. 2. With oven at full fire. 7. 5. Reassemble in reverse order. Make note of wire numbers and location for reinstallation. 2. 58 Impinger I -–1000 Series Service Manual . 4. 5. 8. Shut off power at main breaker. NOTE: The bypass screw should be adjusted all the way in. Remove control panel top and front cover. Remove two (2) 3/8" x 16 hex nuts that hold main orifice bracket in place. Remove piping from old temperature control valve. 3. 4. 5. 8. Reassemble in reverse order. Shut off power at main breaker. 4. Make note of wire number and location for reinstallation. replace cover screw. Remove one screw from control knob guard and move guard to one side. 5. Check pressure tap for gas leaks before closing panel. Remove gas control valve (See Above). NOTE: It may be necessary to remove conveyor and fingers from oven cavity. be sure the sensing bulb is properly placed in the oven cavity. Shut off power at main breaker Shut off gas supply. remove manometer and adapter. The sensing bulb is properly placed in the oven cavity when it is placed in the spring holder and positioned with the 5 1/2" of the bulb to the left of the spring holder. Remove piping from solenoid valve. Remove control panel top and front cover.3. Turn off electric power and gas. NAT/10" W. Reassemble in reverse order. Note wire numbers and location. 2. Remove temperature control valve sensing bulb from oven cavity. Reassemble in reverse order.International . 5. SOLENOID VALVE 1. Remove three (3) wires from temperature control board. Close control panel and check system operation. Remove the two (2) 3/8" x 16 nuts that hold main orifice bracket to the burner assembly. THERMOCOUPLE MEASUREMENT CHART: EXPLANATION: The junction temperature is the ambient air temperature where the thermocouple fastens to the electronic temperature control board.77 4. Reassemble in reverse order.36 6.11 14.43 14.06 4. Disconnect contactor wires and mark for reinstallation.95 4.86 12.06 5.58 7. O J U N C T I O N 90°F 88°F 86°F 84°F 82°F 80°F 78°F 76°F 75°F 74°F 72°F 70°F 68°F 66°F 64°F 62°F 60°F 200°F 3.43 9.78 M 500°F 12. Remove control panel top and front cover.26 13. Shut off power at main breaker.20 5.46 5.66 9.65 15.47 6.32 3. Shut off power at main breaker.49 3.46 8.23 5. Remove two (2) wires from temperature control board.14 10.69 3.99 7.40 T E M P HEATING ELEMENT 1.83 3.78 10.REPLACEMENT 1. a loose connection may result.63 8. 2.89 9.94 15.69 400°F 9.89 3. 3.82 6.43 10.46 12.00 8.12 7. Remove screws from mounting bracket and replace contactor.69 14.23 7.11 5.52 7.60 3.49 10.95 11.69 12.83 9.31 10.94 8. Slide thermocouple out of oven chamber.International 59 . 2.88 4.76 15.23 5. Remove two (2) mounting screws and remove heating element.29 5. 3.64 6.72 10.26 10.92 N 350°F 7.76 6. Impinger I -–1000 Series Service Manual .57 5.72 9. NOTE: Be sure the lead terminals are double nutted to the heating element and are tight If the leads are not attached in this manner.37 3.49 7. remove fan shroud.29 8.97 13.55 11.01 E 450°F 10.17 8.35 11. THERMOCOUPLE.86 7. 4.81 7.97 15.40 8.40 14.03 13.51 12.54 9.12 250°F 4.99 16.69 7.83 4.59 15.71 15. 5.49 11.17 7.00 10.09 11.00 14.82 15.59 6.05 16.49 9.74 12.46 14.63 V 300°F 6. NOTE: For ovens SN 4768 and above.40 5.72 3.34 5.35 7.55 10. 2.74 14.11 16. NOTE: Be sure contactor is not mounted upside down as this will cause a constant on condition.06 7.58 8.12 8.70 6.52 5. Reassemble in reverse order.51 14. 5.28 14.52 8. 4.16 E 325°F 7.28 16.01 4.94 5.37 9.37 11.24 T 425°F 10.00 5.26 3.83 7.19 14.57 12.20 11. Make note of wire numbers or color and location for reinstallation.26 11.80 14.10 7.53 6. Remove control panel top and front cover.60 9.63 14. Reassemble in reverse order making sure the metal end on the thermocouple is securely in the wire form in the oven chamber.75 7. Remove oven back assembly.60 10.89 7.34 14.15 13.73 6.66 11.20 10. NOTE: Remove conveyor and bottom fingers to aid in removal and installation of thermocouple.93 6.57 10.55 3. causing arcing and lead wire burn off.20 13.23 14.03 11.32 P 550°F 14.63 12.78 3.37 10.18 10.95 10.05 7.06 8.46 7.43 3.23 16.66 10.86 15.53 15. Remove rear motor cover.91 10.32 11.63 7. Disconnect heater element wire and mark for reassembly. 5.61 11.17 5.66 3. 3.89 12.41 6.89 10.05 14.83 10.80 12.72 11.26 8.97 11.14 11.92 12.86 600°F 15.06 10.MERCURY CONTACTOR 1.80 9. 6.09 13.12 10.35 8.87 6.40 7.17 16.43 11. 4.30 6.77 9. Remove cover from relay box.57 14.29 7.34 16. The Honeywell ignition control module provides 100% safety lockout. from the burner to terminal #4 on Johnson gas control is no longer used. Use template supplied to locate and drill two (2) 7/32" mounting holes for new Ignition Control. Tools required: Center punch and 7/32" drill bit. 5./P. Cut Wire at burner and discard. make certain that the green #67 ground wire (supplied) is installed properly. on ignition control.International .V. Connect the red wire from burner blower motor centrifugal switch to terminal marked 24V on ignition control. control will lockout or shut off. Connect red wire from gas valve to terminal marked M. on ignition control. on ignition control. Connect the green wire from 24VAC transformer to wire #68 at terminal marked 24V(GND) on ignition control. Control will try for ignition for 15 seconds. 6. Remove ignition control package from Johnson gas valve and discard. by using splice connection on green wire supplied. If ignition does not occur. Connect wiring as follows: Connect blue wire from gas valve to terminal marked P. the 24 VAC burner transformer (rated at 20VA) must be replaced with the larger (rated at 40VA) #369531 Transformer. Use care to avoid drilling through any important information or agency approval markings on the specification plate. 4. Connect black wire from gas valve to termainal marked M. 1. Remove front panel. Connect green #68 wire (supplied) from terminal 24 GND to terminal GND (burner) to ground. the burner switch must be turned off for 1 minute. NOTE: On some Impinger ovens. To reset control.V.V. 3. Connect white wire from indicator light to ground. Remove control panel top and front panel. 2. Read all instructions supplied in kit before starting. When mounting new ignition control. it may be necessary to drill the mounting holes through the oven specification plate. NOTE: It may be necessary to replace ignition cable terminal with .250" quickconnect terminal (supplied).V. G-60 or G-65 Ignition Control with the new Honeywell Ignition control. 60 Impinger I -–1000 Series Service Manual . Shut off power at main breaker.IGNITION CONTROL NOTE: When replacing Johnson Controls. Connect orange spark lead from burner to terminal marked "spark" on ignition control. 7. The white flame sensor wire. 3. Remove flame sensor by removing one (1) mounting nut. NOTE: Be sure flame sensor is not bent or touching any other burner parts. 5.International IGNITOR/SENSOR CABLE RING TERMINAL END OF WIRE HARNESS SUPPLIED IN KIT 61 . Remove burner assembly (see burner assembly). Reassemble in reverse order. 6. 4.24V (GND) 24V 1 24V 2 24V WHITE FROM PILOT LIGHT BLUE FROM VALVE BLACK FROM VALVE #3 RED FROM VALVE TO PILOT LIGHT 24V GND 9 SPARK GND MV/PV MV PV BUTT SPLICE AND NEW GREEN WIRE SUPPLIED IN KIT 2 MV/PV WHITE FROM PILOT LIGHT MV 6 24V 1 3 4 GND PV 5 TO PILOT LIGHT FROM BLOWER CENTRIFUGAL SWITCH #3 RED FROM VALVE BLACK FROM VALVE BLUE FROM VALVE BUTT SPLICE AND NEW GREEN WIRE SUPPLIED IN KIT 24V FROM TRANSFORMER INSULATED MALE TAB CONNECTOR FLAME SENSOR 1. Disconnect one (1) wire from flame sensor. 2. Shut off power at main breaker. Remove control panel top and front cover. Impinger I -–1000 Series Service Manual . 4. is no longer available. 5. Remove control panel top and front panel. Reassemble in reverse order. note number and location. Reassemble in reverse order and check. Impinger I -–1000 Series Service Manual . 3. NOTE: The complete burner blower motor assembly. Remove control box and components from burner blower motor. Remove control panel top and front panel. 5. Material needed: #29 drill bit and #8 x 3/8" self tapping screws (3 each) See Burner blower motor section for wiring information. Discard control box and relay. Remove pilot shield and pilot shield extension. Remove pilot line from pilot orifice. Remove control box cover from burner blower motor. 2. 6. 5. Shut off power at main breaker. Shut off power at main breaker. 4. Remove the two (2) wires from the thermostat located on the back wall of the control box. TRANSFORMER 120/24 VAC 1. Remove two (2) mounting screws. Hl-LIMIT . 4. 4.ELECTRIC OVENS 1. 2. 3.GAS OVENS 1. with control box (PN 369359). Shut off power at main breaker. The blower motor assembly (PN 369265) has been changed to a burner motor kit (PN 369366). HEAT LIGHT (125 VAC) . note number and location. 6. Remove control panel top and front cover. 5. 3. 3. Remove burner igniter. Grasp body of light assembly and slide sideways to remove. 5. 3. Replace covers and check system operation. Remove burner assembly (see Burner Assembly). 4.ELECTRIC OVENS 1. Shut off gas supply. 2. BURNER LIGHT (24 VAC) . Remove pilot orifice from burner igniter. If the burner blower motor or 24V transformer (PN 369531 ) are replaced. PILOT ORIFICE . Remove two (2) wires from heat light. 6.BURNER IGNITOR 1. Shut off power at main breaker. 2. the following modifications must be made: Shut off power at main breaker. 2. Remove control panel top and front cover. Mount transformer on air switch bracket (use transformer as template). Remove burner assembly. THERMOSTAT. Reassemble in reverse order and check.BURNER 1. 4. Grasp body of light assembly and slide sideways to remove. 2. Remove two wires from burner light.International . 8. Remove flame sensor. Remove access cover. Remove control panel top and front cover. NOTE: Be sure to press red "reset" button on new thermostat to ensure that it is in the "closed" position. NOTE: Be sure to reconnect burner igniter cable to ignition control. 5. 3. 7. 62 Shut off power at main breaker. 7. Reassemble in reverse order. MAIN ORIFICE .CONVEYOR SPEED CONTROL 1. Reassemble in reverse order. shaft and tightening set screw. C.International . Reassemble in reverse order and calibrate the conveyor D. Remove shaft locking nut. Shut off power at main breaker. Shut off power at main breaker. Shut off power at main breaker. 4. 8. 4. Remove main orifice from orifice bracket. Unbolt temperature control valve assembly (see Temperature Control Valve) and carefully rotate to access main orifice bracket. 6. 5. 3. 3. CONVEYOR MOTOR REPLACEMENT . Bodine System). wiring from conveyor control board. control board (See D.14974 1200 SERIES SN 4390 – 14791 1. CONVEYOR SPEED CONTROL (NON-DIGITAL DISPLAY OVENS) 1.Calibration. Check all gas fittings for leaks. C. Remove control panel top and front panel. 4.BALDOR 1000 SERIES SN 4390 . Remove the conveyor drive chain from the motor sprocket. Remove old dial by loosening set screw. Remove chain guard. Install new shaft locking nut. 3. Remove control panel top and front cover. 3. Remove the conveyor drive chain from the motor sprocket. Install new dial by sliding over pot. POTENTIOMETER . NOTE: This is a friction type locking nut do not try to trim this nut to fit. 6. 2. Remove conveyor speed control dial. Reassemble in reverse order. 4. shaft and tighten set screw. 5. 2. 3.6. 2. 8. 5. 7. Shut off power at main breaker.BURNER 1. 2. Slide dial assembly onto pot. shaft to its minimum speed position. Remove pot. 7. 2. 5. shaft.BODINE (SN 100-4389) 1. Reassemble in reverse order. 63 Impinger I -–1000 Series Service Manual . 3. Remove chain guard. CONVEYOR MOTOR REPLACEMENT . Remove control panel top and front panel. Shut off gas supply. from front panel. Shut off power at main breaker. 6. Remove the four (4) mounting bolts and nuts. CONVEYOR SPEED CONTROL (OVEN WITH DIGITAL DISPLAY) 1. DIAL. Remove mounting nut from pot. 4. Motor Control Board . 5. DIAL. Remove the sprocket from the conveyor motor shaft by loosening the set screws and sliding the sprocket off the shaft. Unplug the conveyor motor wiring harness. Remove dial by loosening set screws. NOTE: Be sure not to damage capillary tube. Turn speed control pot. Disconnect pot. Shut off power at main breakers. Remove pot. assembly. 4. 2. Set new dial indicator to "000" in window and lock. The magnet and sensor will also be available as a replaceable spare part. The digital speed readout may be observed to check proper adjustment of the optical encoder assembly. control board (See D. Recheck tightness on the set screws to be sure they are tight. Shut off power at main breaker. bracket in proper alignment. 8. 3. Pushing coupling down on motor shaft.5. Unplug the wire harness for the motor. Remove 2 screws from optical encoder and remove encoder. 64 Impinger I -–1000 Series Service Manual . Swivel tach. Unplug the wiring harness for the motor. Remove the sprocket from the conveyor motor shaft by loosening the set screw and sliding the sprocket off the shaft.Calibration). 9. Remove 3 screws from tach. Remove conveyor motor assembly . Note which terminal the red and black wires are attached to. Reassemble in reverse order and calibrate the control board. refer to optical encoder in this section for adjustment. 6. Remove the sprocket from the conveyor motor shaft by loosening the set screws and sliding the sprocket off the shaft.3. push coupling on to motor shaft.STEPPER 1000 SERIES SN14975 AND ABOVE 1200 SERIES SN14792 AND ABOVE 1. 8. Motor Control Board . Pull the coupling apart (approximately 1/8". If available.) COUPLING AND ENCODER DISC 1. C. and optical encoder assembly for reinstallation on new motor assembly. bracket aside and remove coupling. 6. P/N 369600. 8. To install. Loosen both allen set screws (.050 inch allen wrench) located on coupling hub. Remove the chain guard. C. (See pages 104 & 105) Reassemble in reverse order and calibrate in the conveyor D. 4. If only removing for access to coupling follow step 4. Remove conveyor motor assembly . tach.C. (See Stepper Control-Adjustment) NOTE: New drive motors will come as an assembly with Magnet and Hall Effect Sensor. OPTICAL ENCODER ASSEMBLY 1.2mm) and fasten the motor side set screw. Shut off power at main breaker. loosen the 4th. Remove control panel top and front cover. Reassemble in reverse order. NOTE: The thin. slotted encoder disc must be handled with care so not to bend it. The infrared light beam will be broken by slots in the encoder disc. cut wires to remove as new wires and plug are provided.If replacing with new assembly. 2. 7. Tighten the set screw on the tach. The encoder disc must be nearest motor.) Remove the four (4) mounting bolts. (When replacing the magnet be sure to clean shaft and locate new magnet up against the shoulder on the shaft. (Reversing the polarity will cause motor to run wide open with no control from the speed pot. side first maintaining the . If it does readjust the coupling. Disconnect the red and black wires from the terminals on the tach. 5. 2. Remove dust cover. The encoder disc should not touch the bottom or top of the optical encoder. 6. If the optical encoder was loosened. remove tach. Remove dust cover above motor. 3. Refasten tach. coupling. 5. 6. conveyor motor. 4.International . Remove the conveyor drive chain from the motor sprocket. 5. Unplug the wire harness for the hall effect sensor (mounted on motor) from the conveyor speed control. 4.010 minimum dimension between the coupling hub and tach. Remove encoder assembly. LOC TITE (the removable kind) should be used to secure set screws. 3. bracket. 7. Remove pins from connectors with pin extractor tool. 7. 9. bracket. 2. 9. 10. Shut off power at main breaker. To adjust optical encoder: Position the encoder assembly so it does not rub the coupler hub and is square with the encoder disc.. 10. generator which is mounted on the top of the D. see optical encoder assembly in following procedure. Remove the four (4) mounting bolts and washers. Loosen dust cover screws and pull dust cover away from motor. CONVEYOR MOTOR REPLACEMENT . If defective. pot. Remove top two (2) mounting screws and remove control board. 2. CONVEYOR MOTOR CONTROL BOARD 1. control board and calibrate as per the following instructions: NOTE: THE USE OF A DIGITAL VOLTMETER IS NECESSARY FOR PROPER ADJUSTMENT Check incoming AC voltage at L1 and L2. C. C.TACH.010 minimum between tach.CALIBRATION SN 100 to 4389 . Remove cover from relay box. NOTE: Exchange boards on the mounting bracket before reinstallation.Calibration) SN 14975 AND ABOVE 1000 SERIES GAS OVENS SN 14792 AND ABOVE 1200 SERIES GAS OVENS Make note of wire numbers and location before removing them from the control board.Calibration. 4. Impinger I -–1000 Series Service Manual . cover plate and tach. Should be 100 VDC ± 10 volts. NOTE: In some instances when the input AC voltage runs on the high side of the normal input range.050 inch allen wrench). Shut off power at main breaker. 6. Mark lead position. generator is installed. 7. Remove 4 screws from base of tach. motor control board MUST BE RECALIBRATED There is no repair procedure for the tach. The bottom mounting screw need only be loosened as the mounting bracket for the control board is slotted. Reassemble in reverse order and calibrate. Remove top two (2)mounting screws and remove control board. PLACE DIGITAL VOLTMETER LEADS ON terminal S1 and S2. Turn speed control dial clockwise to its maximum speed position. 5. T1-T2 AND A+ AND A. 8. Place METER LEADS on terminals A1 and A2. (See Stepper Control-Adjustment) 4. Adjust the reg.BODINE SYSTEM 1. Remove control panel top and front cover. Remove cover from relay box. 2. Motor Control Board . Should be 120 VAC ± 10%. In this instance.C. 2. Ieads. MOTOR CONTROL BOARD . Shut off power at main breaker. Bodine System) SN 4390-14974 1000 SERIES GAS OVENS SN 4390-14791 1200 SERIES GAS OVENS Make note of wire number and location before removing them from the control board. Remove tach. pot. Bracket and coupler hub. 3. Loosen coupling set screw (. Identify D. and tach. C. The bottom mounting screw need only be loosened as the mounting bracket for the control board is slotted. the D. 3. for a reading of 3. a reading of 3. 6. Reassemble in reverse order and calibrate (See D.4 VDC. replace. Reassemble in reverse order. SN 100-4389 BODINE SYSTEM Remove wires from terminal strip on control board making sure to mark wires so they will be reinserted on the proper terminal. POLARITY BETWEEN. Remove the four (4) hex head screws. adjust the max pot. Remove tach. Motor Control Board . bracket from motor. Reassemble in reverse order and calibrate (See D.IS CRITICAL. Remove conveyor motor assembly .4 VDC. D. Check conveyor travel in a no load situation to insure conveyor belt is traveling at a constant speed. 5. 7.45 VDC is acceptable. 3. Check field voltage at terminals F1 and F2. NOTE: If a new tach. for a reading of 3. C. is now free for removal. Remove control panel top and front cover. Maintain spacing of . Adjust speed pot to obtain the proper time setting for the conveyor to meet customers desired speed . for a reading of 125 VDC.International 65 . you may have difficulty adjusting the max. GENERATOR 1. Remove 2 slotted screws from dust cover base and remove dust cover. Adjust "IR" pot. and "IR" pots counter clockwise until they stop (DO NOT turn CL pot. FUSE D. so the voltmeter indicates between 2 and 6 VDC.) Adjust "TACH" pot. Turn speed control pot. FUSE GND S3 S2 S1 A2 A1 F2 F1 L2 L1 D. Voltage at L1 and L2 terminals of the control board is to be 120 VAC ± 10% Connect a digital volt meter to terminals A+ and A-.3 A. CONTROL BOARD "BODINE" S/N 100-4389 REG MIN MAX TERMINAL STRIP 3 A.5 and 2 VDC above tach. to read between 1. set meter on 200 VDC scale. to its minimum speed setting.3 then adjust IR to between 111. Check speed of conveyor and adjust time/temp. Adjust "MIN" pot. STYLE 1 CONTROL BOARD ADJUSTMENT NOTE: A digital meter must be used for this adjustment.8 VDC and 112. (Example: If tach. Repeat at 35 VDC. MOTOR CONTROL BOARD SN 4390 . "MIN". display if necessary.3 VDC) Turn speed control pot. 66 Impinger I -–1000 Series Service Manual .International . so the volt meter indicates 110 VDC ± 0. (on oven control panel) to its maximum speed setting. All three were supplied under the same part number. Observe for approximately 30 seconds to see if stable within ± 0.14790 1200 SERIES Three different styles of control boards have been used and all three are still usable. CONTROL BOARD "BODINE" S/N 100 4389 ( TOP VIEW ) D. C. Seal pots with Glyptol or nail polish. reading. Turn speed control dial to obtain a reading of 22 VDC on your meter. Turn "MAX". reading would be 110.5 VDC.5 volts.14974 1000 SERIES GAS OVENS SN 4390 . C. C. L1 A+ . so the voltmeter indicates 1. Voltage at L1 and L2 terminals of the control board is to be 120 VAC± 10%. turn both the "MAX" and "MIN" pots 10 turns in either direction and then 5 turns in opposite direction. FUSE CHOKE L2 A- L2 A- P2 P2 P3 P3 P1 P1 MAX MIN IR CL TACH T1 T2 MAX MIN IR CL TACH T1 T2 BOARD P/N 369155 " B " BOARD P/N 369272 STYLE 1 STYLE 2 AND STYLE 3 CONTROL BOARD ADJUSTMENT NOTE: A digital meter must be used. it is probably defective.8 VDC. (on oven control panel) to its maximum speed setting. display if necessary.4 to 1. set the meter on DC scale. so the voltmeter indicates 22. Readjust if necessary. If after this procedure. Turn the speed control pot. to its maximum speed setting and check if voltage is still at 1. FUSE 1 A. This will center the pots and allow them to be calibrated. the board will not adjust. FUSE 4 A.International 67 . to its maximum speed setting and check if voltage is still at 22. Seal pots with Glyptol or nail polish. Impinger I -–1000 Series Service Manual . RESISTOR L1 A+ 4 A. to its minimum speed setting. Reset the speed control pot. Turn speed control pot.5 VDC. Readjust if necessary.8 VDC. the opposite must always be checked until both "MIN" and "MAX" are in proper adjustment. If readjustment of either the "MAX" or "MIN" pot.6 to 22. NOTE: Occasionally a new board (Style 2 and 3 only) is so far out of adjustment that you will be unable to adjust the correct voltage. Reset the speed control pot. Adjust the "MIN" pot.6 to 22. Measure the speed of the conveyor and adjust the time/temp. FUSE 1 A. was necessary. Adjust the "MAX" pot.5 VDC.4 to 1. Connect a digital voltmetet to terminal T1 and T2. To correct. L1 A+ L1 A+ A FUSE 4 A. FUSE 1 A FUSE RESISTOR 4 A FUSE CHOKE 1 A. FUSE L2 A- L2 ACHOKE P2 P3 P1 P3 P2 P1 P 1 MAX MIN BOARD P/N 369155 T1 T2 MAX MIN " B " BOARD P/N 369272 T1 T2 STYLE 2 L1 L2 A- A+ RESISTOR CAPACITOR MIN S3 S2 S1 MAX T1 T2 BOARD P/N 369155 STYLE 3 68 Impinger I -–1000 Series Service Manual .International . Min. measure (STOPWATCH) the time (SPEED OF PAN) of the leading edge in to leading edge out of oven. Conveyor Speed Adj.STEPPER CONTROL . J1 J4 J5 POTENTIOMETER Brown Red Blue Red POWER Gray LOCKED ROTOR Black to #4 To T/T display White to #7 TIME/TEMP 1. With power off.ADJUSTMENT S/N 14975 AND ABOVE 1000 SERIES GAS OVEN S/N 14792 AND ABOVE 1200 SERIES GAS OVEN CURRENT SENSE DO NOT ADJUST Heat Sink MOTOR J6 J3 5 4 3 2 1 ON Max. Turn power off and set #1 dip switch to its (ON/OFF) other position and verify that the conveyor reverses direction when power is applied. Turn the speed adjustment pot. the five (5) dip switches located on the conveyor control (see drawing above) should be set as below. CAUTION: ALWAYS REMOVE POWER BEFORE CHANGING CONVEYOR DIRECTION. the ten (10) dip switches located on rear of Time/Temp Display (see drawing on page 73) should be set as below. With power off.International 69 . (See drawing on page 73). Display indicates 5:00 minutes. Place a pan on the conveyor. Turn conveyor speed control fully counterclockwise and adjust the stepper control maximum speed pot (refer to drawing above) so the display indicates 50 seconds. Conveyor Speed Adj. 5. ON FOR 50HZ *SWITCH 3 . on the rear of the Time/Temp. 6. Set conveyor travel direction as customer requests. Impinger I -–1000 Series Service Manual .OFF FOR 60HZ. DISPLAY 1 2 3 4 5 6 7 SWITCH POSITION OFF * * ON OFF OFF ON *SWITCH 2 . Display so display agrees with time measured by the stop watch. ON FOR °C 8 ON 9 OFF 10 ON 3. DIP SWITCHES CONTROL SWITCH POSITION 1 2 3 4 5 OFF OFF ON OFF OFF 2. 4. With conveyor running.OFF FOR °F. set conveyor speed control so Time/Temp. NOTE: Repeat 4 and 5 to be sure settings are accurate. Turn conveyor speed control fully clockwise and adjust the stepper control minimum speed pot so the display indicates 30 minutes. 2. Remove drive shaft from end of conveyor frame. 4. Remove conveyor belting from conveyor. Shut off power at main breaker. 3. 3. 4. 2. Remove control panel top. Remove control panel top and front panel. 4. 3. 5. MINI CIRCUIT BREAKER 1. Remove drive sprocket from drive shaft. To reverse conveyor direction. Remove relay box cover. Reassemble in reverse order. 3. Reassemble in reverse order. 2. Remove knurled mounting nut and remove. Remove bearing retaining clips from ends of drive shaft. 3. DRIVE END 1. Reverse wires fastened to terminals T1 and T2. 5. Both set of leads must be reversed or oven will run at maximum speed with no speed adjustment possible. IDLER END 4. 5. NOTE: Be sure to reset breaker before operating. BEARING. 2. use the following procedure. Slide bearing off drive shaft. 6. Disconnect two (2) wires from circuit breaker. 4. CONVEYOR SN 100-2163 1. 2. Remove control panel top. 5. 3. 2. Remove conveyor from oven and place of flat surface. SN 4390-14974 1000 SERIES GAS OVEN SN 4390-14791 1200 SERIES All ovens leaving our plant are wired to operate conveyors from left to right. Remove idler shaft from end of conveyor frame. Reassemble in reverse order. Remove control panel top. 70 Impinger I -–1000 Series Service Manual . Reassemble in reverse order. Reverse wires fastened to terminals A+ and A-. Slide bearing off idler shaft. STEPPER DRIVE SYSTEM SN 14975 AND ABOVE 1000 SERIES GAS OVEN SN 14792 AND ABOVE 1200 SERIES 1.REVERSING CONVEYOR DIRECTION SN 100-4389 (BODINE) 1. Turn reversing switch (located on relay box) to obtain desired belt direction. 5. Reassemble in reverse order. Change position of dip switch #1 on stepper control board. Remove connecting links from conveyor belting. 1.International . See Installation and Operating Instructions Manual. Shut off power at main breaker. 4. Remove cover from relay box. Shut off power at main breaker. Shut off power at main breaker. Remove two (2) allen head bolts. Reinstall in reverse order. Reinstall plug on conveyor control. 3. 7.(See Drawing). CONVEYOR SN 2164 AND ABOVE 1. Remove idler shaft/bearing/mounting plate assembly from conveyor frame. Reassemble in reverse order. 6.International 71 . Remove bearing/mounting plate assembly from conveyor. 2. CUT HERE DISCARD OLD STYLE NEW STYLE Impinger I -–1000 Series Service Manual . 5. 4. 5. 6. See Installation and Operating Instructions Manual . 7. 5. cut sensor bracket through center hole and install sensor half with one (1) screw. Reassemble in reverse order. Remove drive shaft and bearing assembly from conveyor frame. NEW STYLE Remove two (2) mounting screws and remove sensor from conveyor motor. IDLER END 4. Reassemble in reverse order. Remove two (2) mounting screws. Remove conveyor belting from conveyor DRIVE END 4. Remove connecting links from conveyor belting. Remove bearing from mounting plate. 2. Disconnect transformer wire harness. Shut off power at main breaker.BEARING. To install new sensor. Remove drive sprocket from drive shaft. Remove control panel top and front cover. TRANSFORMER-STEPPER MOTOR CONTROL 1. 3. HALL EFFECT SENSOR – REPLACEMENT NOTE: There are two (2) styles of hall effect sensors . OLD STYLE Remove two (2) screws from conveyor drive motor and break away hall effect sensor from motor shaft. Remove conveyor from oven and place on a flat work surface. EXAMPLE: The probe resistance at 500°F(260°'C) should be 24 ohms. Remove four (4) screws from display bezel (2 top/2 bottom) and remove display. Refer to the above chart to determine if probe is producing the proper resistance. 4. Disconnect wires from rear of display. Disconnect the thermistor probe from terminals 9 and 10 and measure the resistance across the 2 yellow leads. Disconnect two (2) wires at base of transformer and three (3) wires at terminals 1. Disconnect wires from back of digital display at terminal strip (location #9-10).2. TIME/TEMPERATURE DISPLAY . Reassemble in reverse order. Remove control panel top. 5. Shut off power at main breaker. 3.REPLACEMENT 1. 3. and 3 on Time/Temp Display. Remove control panel top. Shut off power at main breaker.International .REPLACEMENT 1. 2.TEMPERATURE GAUGE . (See Time/Temperature Display . Make note of wire numbers and location for reinstallation. Disconnect thermocouple from temperature gauge. Reassemble in reverse order. 2. 4. 6. refer to the following chart and instructions OVEN TEMPERATURE 300º F 325º F 350º F 400º F 425º F 450º F OHMS 182 138 102 62 48 38 500º F 24 550º F 16 Place test pyrometer thermocouple and preheat oven as specified under temperature calibration. b) Check dip switch setting to insure proper positions for the model of oven: 72 Impinger I -–1000 Series Service Manual . NOTE: Remove conveyor and bottom fingers to aid in removal and instaliaticn of thermistor probe. Remove two (2) mounting screws. 3. DISPLAY 1. Shut off power at main breaker. 4. Remove control panel top. Shut off power at main breaker. 5. 5. 4. Remove control panel top. 3. 5. Remove two (2) mounting bolts and remove temperature gauge. Remove relay box cover. THERMISTOR . TRANSFORMER. Note dip switch position and calibrate display as follows: a) Check all wire connections to insure proper tightness. TIME/TEMP.REPLACEMENT & CALIBRATION 1. Reassemble in reverse order making sure the probe is placed securely in the wire form in the oven chamber. Slide thermistor probe out of oven chamber. 2. 2. Reconnect to digital display and calibrate. 6.Replacement and Calibration) To test the thermistor probe. Install new display in reverse order. Adjust temperature calibration pot to achieve a display reading of 500°F(260°C). (Leading edge in to leading edge out. So if actual temperature falls between 497°F and 503°F the display must show 500°F. DIP SWITCH MODULE (TYPE I AND II HAVE ONLY 6 SWITCHES) 1 2 3 4 5 6 7 8 9 10 HI TEMP TEMP CAL TIME 1 2 3 4 5 6 7 8 9 10 YELLOW BLACK PURPLE PURPLE WHITE YELLOW YELLOW RED FROM TRANSFORMER RED TO SET SWITCH RED SWITCH POSITION ON OFF TO THERMISTOR PROBE TO CONVEYOR MOTOR PICK UP To identify the module.International 73 . with Glyptol or nail polish. e) Calibrate temperature: Place a temperature sensor in between top two fingers and set temperature control to 500°F. Type I is 51/8 inches wide Type II is 5 5/8 inches wide Type I & II have a 6 position dip switch module. Type III has a 10 position dip switch module. Adjust the time calibration pot on the rear of the module until the display numbers match the measured time. Seal adjustment pot. allow temperature to stabilize. d) Calibrate time: Place an object on the conveyor belt and time with a stopwatch.) Push in and hold the set button. "Fine Tune" temperature setting to achieve measured temperature swings from 497°F to 503°F. Type IV is 5 5/8 inches wide x 3 ¼ inches deep Impinger I -–1000 Series Service Manual . measure the width of the case. the elapsed time for the object to travel through the oven.ALL 1000 & 1200 SERIES OVENS SWITCH SETTINGS TYPE I TYPE II TYPE III (Baldor Motor) TYPE III (Stepper Motor) TYPE IV (Baldor Motor) TYPE IV (Stepper Motor) 1 OFF OFF OFF OFF OFF OFF 2 OFF* OFF* OFF* OFF* OFF OFF 3 ON OFF** OFF** OFF** ** ** 4 ON ON ON ON ON ON 5 ON ON OFF OFF OFF OFF 6 OFF* * ON ON OFF ON OFF 7 8 9 10 ON ON ON ON ON ON ON ON OFF OFF OFF OFF ON ON ON ON *These switches are for Hertz settings (OFF=60HZ) & (ON=50HZ) **These switches are for temperature read-out (OFF=Degrees F) & (ON=Degrees C) c) Turn power on. Type II is 5 5/8 inches wide. Pot. BOTTOM OF TIME TEMP DISPLAY test leads here reading should be 26 ± .10. 5. 2. Pot. If temperature is still inaccurate after above calibration and troubleshooting.5 VAC at 1-2. Occasionally the pot is accidentally moved or needs adjustment.Type IV has adjustment pots.9. Approximately 13 VAC at 1-3. Shut off power at main breaker. Remove control panel top.International . 2.7.simulator terminals 4. Pot. range 0-34 ohms SWITCH.Installtime/temp. 6. use the following to check the High Temp. and 3. 3. 6. adjust. In the center board. to 74 Impinger I -–1000 Series Service Manual .8. SET 1. TEST PROBES SHOULD READ 18 OHMS 4 7 9 10 Check incoming power to display at Terminals 1. PROCEDURE FOR USE OF TIME/TEMP.and10.5 ohms if not. Pull off black operating knob and remove hex mounting nut. Disconnect wires from time/temp.7. DISPLAY.9.6. does not require adjustment. display terminals 5 and 6. Reassemble in reverse order. 4. Type I & II have a 6 position dip switch module. SIMULATOR NOTE: DO NOT CHANGE HI TEMP POT. normally the High Temp. To identify display type: (MEASURE WIDTH OF COVER ON DISPLAY) Type I is 51/8 inches wide. pot.5 VAC at 2-3.5. WithpowerOFF.removeleadsfrom4. Refer to the following drawing showing proper adjustment of the High Temp. Type III has a 10 position dip switch module. display. Temperature reading should be steady at 540°F + 10°F. to 540°F. Disconnect lead indicated by # in proper diagram and reroute as shown.Dip Switch TYPE I TYPE II TYPE III 1 OFF OFF OFF 2 OFF OFF OFF 3 OFF OFF OFF 4 ON OFF OFF 5 OFF OFF OFF 6 OFF OFF OFF 7 8 9 10 OFF ON OFF ON NOTE: When on 50 HZ power. Install jumper lead indicated by * in proper diagram. interruption or spike) to be reset by fan switch rather than circuit breaker. NOTE: After simulator test is completed. SWITCH REPLACEMENT (FAN. 6. Display should read: (Wait 15-20 seconds) TYPE I 10:20 + 10 sec.475 + 10°F TYPE II 9:20 + 10 sec. dip switch #2 must be "ON" With power ON turn time and temperature cal. Install double pole switch # 369260. Remove switch access cover. Install new switch in reverse order and check. cal. replace display. HEAT. pot. observe if temperature displays stays on during cooling down. Replace single pole switch # 350705. SWITCH REPLACEMENT . pot. Time reading 10:00 ± 5 seconds. pot. HHH TYPE III 9:35 + 10 sec. Also allows locked time/temp. in older models. 5. 615 + 10°F TYPE II 10:10 + 10 sec. If these readings are not achieved. fully counterclockwise. Remove control panel top and front cover. you have the single pole switch. 475 + 10°F Turn time pot. Reapply all other leads as removed. Depress the spring clips on the sides of the switch and push out. 3. to operate same as current production models. the oven Time/Temperature Display must be re-calibrated. to 10:00 minutes and temp.(FAN SWITCH UPDATE) INSTALLATION OF DOUBLE POLE FAN SWITCH #369260 IN PLACE OF SINGLE POLE FAN SWITCH #350705 NOTE: This change is not necessary for proper operation of oven nor is it permissible to change under warranty. Shut off power at main breaker. If it stays on . 2. Note wire number and location.International 75 . To determine which fan switch you have. CONVEYOR) 1. 4. Remove wires from back of switch. fully clockwise. 475 + 10°F TYPE III 10:20 + 10 sec. Display should read: (Wait 15-20 seconds) TYPE I 9:30 + 10 sec. Allows time/temp. Should be changed only at customer's request and their agreement to pay your bill. ADVANTAGE: IDENTIFICATION: REPLACEMENT: Impinger I -–1000 Series Service Manual . If it goes out as soon as fan switch is turned off you have the double pole switch. display (caused by voltage surge. 635 + 10°F Turn time and temp. as the air pressure switch closes. 23 for L. Disconnect two (2) plugs. Adjustment screw is located on the front of the valve. 9. Remove four (4) screws and slide filter out of valve housing and inspect. PRESSURE CONTROLLER ADJUSTMENT OUTPUT MANIFOLD PRESSURE ADJUSTMENT + gnd FILTER COVER PLATE FILTER COVER PLATE 2 gnd 1 2 3 3 ELECTRICAL CONNECTOR ELECTRICAL CONNECTOR 76 Impinger I -–1000 Series Service Manual . 3. Adjust as needed. remove plastic cap and adjust as needed: 3.C. 4. 7.8 on dial for natural gas. Reassemble in reverse order and check for leaks around cover. Check for proper line voltage switching from N. check for proper adjustment of gas pressure switch. (1 ) 3 prong and (1 ) 4 prong . SIDE VIEW TOP VIEW 8. Check and adjust manifold pressure. After assembled.O. Install new switch in reverse order. Reassemble in reverse order (check all pipe fittings for leaks).Note location. 2. Check gas filter by removing cover plate (located on either side of valve).C. Disconnect pipe union just above gas valve and remove assembly. to N. Remove control panel top. Remove the four (4) screws from the incoming nipple mounting bracket. Gas and 4.5" W.C. 2. 4. Remove pressure tap located in gas piping above the gas valve prior to the burner orifice and install manometer . GAS VALVE . turn screw counter clockwise. Disconnect the gas piping from the back of the unit. turn screw clockwise. for L.P.REPLACEMENT AND ADJUSTMENTS 1. 6. 1047 IMPINGER OVEN (EXPORT) AIR PRESSURE SWITCHES . Remove incoming nipple. 5. To increase sensitivity.REPLACEMENT AND ADJUSTMENT 1. 5.International . 8. 3. remove snap on cover on the side of the switch to expose adjusting screw. make sure air tube is not blocked miss-aligned. To adjust the air pressure switch.P.5 for town gas. Remove air tube from switch assembly. for Natural Gas and 10" W. Remove switch from wire hanger. to decrease sensitivity.THE FOLLOWING ITEMS ARE USED IN THE MODEL 1030. Disconnect wires from switch making note of wire number and location for reinstallation. 1046. Remove control panel top and front cover. REPLACEMENT 1. Remove control panel top and front cover. 5. 3. 2. Remove two (2) wires from thermostat. Unplug connector on bottom of spark generator. 4. 2. Remove two (2) mounting screws and remove generator assembly. Remove screws from bracket and remove thermostat. Remove front portion of relay by pulling straight out (rocking motion). Loosen two (2) locking screws (approx. Remove control panel top and front cover. note wire numbers and location for reinstallation. make sure manual reset button lines up with access hole in front cover. Remove four (4) nuts from main orifice burner bracket and remove assembly. 4. Remove control panel top and front cover. Disconnect two (2) wires from solenoid. 1/2 turn). 5. Reassemble in reverse order and check system operation. 5. HIGH . 6. 3. 3. Reassemble in reverse order making sure capillary tube is placed securely in the wire form. 2. 6. NOTE: Depress reset button to insure thermostat is set for operation. 6. 3. Remove capillary bulb from wire form in oven chamber and pull through tube into control box. Remove two (2) wires from alarm.IGNITION CONTROL . Remove conveyor and fingers.REPLACEMENT 1. note wire number and location for reinstallation.REPLACEMENT 1. 2. 4.LIMIT THERMOSTAT . 4. Remove two (2) wires for spark generator. Remove wires from plug-in terminal strip. Remove control panel top and front cover. Reassemble in reverse order and check. 3.International 77 . Remove control panel top and front cover. 1/2 turn) on ignition control and remove front portion of relay exposing terminal strip. Remove retainer cover from alarm and remove assembly from mounting bracket. Replace valve and reassemble in reverse order. note wire numbers and location. 5. 2. After assembly. FLOW BURNER ALARM . check all fittings for leaks and check system operation. Impinger I -–1000 Series Service Manual . SOLENOID VALVE – REPLACEMENT 1. Disconnect pipe union just above gas valve assembly. note wire numbers and locations.) Check system operation. SPARK GENERATOR – REPLACEMENT 1. Reassemble in reverse order (NOTE: Plug in terminal strip is polarized and will only allow relay to plug in one direction. 4. Remove two (2) screws from mounting bracket and remove. 6. Loosen two (2) locking screws on front cover of relay (approx. 4. Remove control panel top and front cover. 3. 3. Reassemble in reverse order and check system operation. 5. check all pipe fittings for leaks. Remove power and solenoid leads (4). note wire number and location. PILOT LIGHT (220V) .REPLACEMENT 1.International . note color and location (white:pos/red:neg.BURNER ALARM LIGHT . Remove gas valve assembly (See Gas Valve) Remove screws from burner tube and pull burner assembly out. Remove thermocouple leads (2). 3. 2. Remove switch access cover.REPLACEMENT 1. BURNER BLOWER MOTOR – REPLACEMENT 1. 2. Grasp body of light assembly and slide sideways to remove. 5. note wire number and location. Reassemble in reverse order and check system operation. Remove screw and board assembly and replace. 2. Remove two (2) wires from light assembly.REPLACEMENT. 4. 6.MODEL 1030 1.REPLACEMENT 1. Remove two (2) wires from light assembly. Remove screws around blower tube.). Remove wire connectors from igniter sensor assembly. 2. Disconnect motor wiring and remove. IGNITER SENSOR ASSEMBLY . 6. Remove control panel top and front cover. Reassemble in reverse order and check system operation. Remove control panel top and front cover. Remove control panel top and front cover. Remove screws from mounting bracket and remove assembly. 3. Reassemble in reverse order and check. 2. Reassemble in reverse order and check. Remove control panel top and front cover. NOTE: When replacing #369174 with (new) #369728. note color and location. Remove potentiometer leads (3).5 K OHMS transformer marked with green gold or silver dot 1 BLACK WHITE 2 3 P6 P5 11 10 L 1 120 VAC L2 + THERMOCOUPLE TYPE J 6 7 P3 9 LOAD 78 Impinger I -–1000 Series Service Manual . 4. 4. Grasp body of light assembly and slide sideways to remove. RED POTENTIOMETER 2. 5. note wire number and location. 3. NOTE: After installation. 4. turn temperature control to its maximum position and allow oven 30 minute preheat then calibrate board as follows: Place temperature probe between top fingers #2 and #3 (making sure probe is not touching any metal) and adjust potentiometer P6 to a Maximum temperature of 575°F. TEMPERATURE CONTROL BOARD . Reassemble in reverse order.REPLACEMENT 1. Install new control pot. Disconnect all wires and mark for replacement. 3. Remove nut and washer from rear of relay assembly and remove assembly. 2. Remove relay by removing two (2) mounting screw. 7. note wire colors and location. Remove control panel top and front cover. note wire colors and location. Remove knob and locknut on control pot shaft and pushout. Remove wire from ignition control (#20). 2. 3. GAS CONTROL . 2. RELAY. 4. Remove conveyor from oven. Shut off power at main breaker. display for knobs with reference numbers only. Remove conveyor belt. 3. 6. Install new temperature control board in reverse order and check system operation. Remove wire from burner blower motor connector plug (requires pin extractor tool (#369600) (#73). adjust it to agree with the time/temp. 5. 20 MINUTE . Remove cover from relay box. TEMPERATURE CONTROL .1047 1. Remove idle & drive shaft assemblies. 4. NOTE: Do not over tighten mounting screw as this may damage the internal electronic components. 3. control knob and locknut.International 79 . Remove one screw from control knob guard and move guard to one side. 4. 2. Remove temp. Remove one screw from control knob guard and move guard to one side. in reverse order and check system operation. 3. Disassemble and clean/replace parts as needed. 5. Remove center mounting screw.REPLACEMENT . Remove control box top and front cover. NOTE: If temperature control knob is type with temperature numbers on it. Remove control box top and front cover. Disconnect all wires and mark for replacement. RELAY ASSEMBLY. #9 is 500°F/260°C. Use Molykote G-N Metal Assembly Paste for lubrication. 5. Remove cover from relay box. 2. Remove control panel top and front cover. 4. 6.REPLACEMENT . 5. TIME DELAY RELAY. 2. CONVEYOR BEARING REPLACEMENT AND SHAFT LUBRICATION – 1200 SERIES OVENS 1. Reassemble in reverse order. Remove six (6) wires from temperature control board . Remove control panel top and front cover. 4.REPLACEMENT 1.1046-1047 1. Install new relay in reverse order and check system operation. 4. Remove two (2) wires from transformer (#21 and #23). Impinger I -–1000 Series Service Manual .MODEL 1046. Remove three (3) wires from temperature control board. BURNER BLOWER MOTOR . 3.TEMPERATURE CONTROL POTENTIOMETER .REPLACEMENT 1. Inlet and Outlet Thumb Screw Seam Cover. (Electric) Compression Spring Flat Washer. Stand Insulation Holder Internal Crumb Pan Finger Housing Columnating Plates (See Installation Manual) Finger Cover Bracket.PARTS / MODEL SERIES 1000 & 1200 . Instrument Cover Label Window Fº Window Cº Display Bezel 80 Impinger I -–1000 Series Service Manual . 5/16” Conveyor Hold Down Bracket Shoulder Screw Baffle. Chain Guard – S/N 2164 to Q14973 Bottom Chain Guard – S/N 2164 to Q14973 Adjustable Leg Caster – 6” Leg.GENERAL LETTER A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AA BB CC DD EE FF GG HH JJ KK LL MM NN OO PP PART NO. Snap In Chain Guard Cover – S/N 2164 to Q14973 Top. Control Panel Flue Assy. ( S/N Q14974 & Above) Split Ring Retainer Receptacle. Support Bracket Pins Strike Assy. 369003 369207 369337 369110 369209 369828 369157 1534 369057 369643 1009 369062 369046 369367 369140 369903 369141 369139 369058 369211 369369 369203 369749 369204 369373 369205 369651 369379 369052 369030 369328 369904 369218 369053 369055 369748 369690 370048 369673 369244 369887 369886 369199 369246 DESCRIPTION Door Hinge Handle Retainer Retainer (See Page E-18) Access Window (See Page E-18) Latch & Strike Handle Spacer Complete Door Finger Support Assy. Oven Top Top. Time/Temp Display Cover Instrument Cover Thermostat Guard Instrument Cover Assy. Conveyor Opening Stud Wing Head Chain Cover Assy. Chain Cover – S/N Q14974 & Above Label.International . (Gas) Flue Assy. International 81 .BLOW UP / 1000. 1200 – GENERAL Impinger I -–1000 Series Service Manual . 40VA Burner Blower Motor Kit Thermocouple Temperature Gauge Thermostat Knob (Degree F) Thermostat Knob (Degree C) Gas Valve (Body Only). LP Pilot Shield. Conveyor Controller . Natural Gas Main Burner Orifice. 10 Amp Conveyor Speed Control Dial Sprocket. Extension Pilot Shield. 230/460/575 VAC See Burner Blower Motor . 3 Amp Fuse. LP Burner Ignitor Flame Target Temperature Sensing Switch Sensing Rod Kit Air Switch Tube Conveyor Speed Controller . NAT/LP Ignition Control.S/N 4389 & Below Reverse Switch w/Harness . On/Off Lens.International . NAT & LP Pilot Shut Off Valve Temperature Control Valve Main Burner Orifice.S/N 4389 & Below J K L M N O P Q R S T U V W X Y Z AA BB CC DD EE FF 82 Impinger I -–1000 Series Service Manual . A.Page 55 Transformer.S/N 4389 & Below Transformer.S/N 4389 & Below Brush Brush Cap Brush Spring Relay D. C. 24 VAC Blower Air Switch Conveyor Motor. Natural Gas Pilot Orifice. 369531 369366 369009 369029 369108 369300 369263 369393 369344 369006 369072 369099 369144 369202 369075 369073 369100 369076 369142 369007 369902 369067 369063 DESCRIPTION Fuseholder Fuse. S/N 2584 TO 4389 LETTER A B C D E F G H I P/N 369012 369013 369014 369064 369066 369260 350225 369104 369025 369022 369113 369114 369115 369032 369008 369080 369543 N. Red Pilot Light.Prior to S/N 4390 Switch. Main Flame Sensor Pilot Orifice. 120/24V .PARTS / MODEL 1002-1003 . L. Drive . 1003 – S/N 2584 TO 4389 Impinger I -–1000 Series Service Manual .International 83 .BLOW UP / 1002. 1A 250V Fuse. Yellow Pilot Light. 4 Amp. Cooling Fan Thermistor Probe Set Switch Assy. Control Box Cord Set. Non Delay.S/N 4390 & Above Switch. Main Flame Sensor Pilot Orifice. ON/OFF Double Pole Fan Switch Lens. 250V Hi Hat Temperature Sensing Switch Control Transformer Unit Relay Cover. Natural Gas Pilot Orifice. S/N 4390 & UP LETTER A B C D E F G H I J K L M N P/N 369247 357107 369012 369013 369014 369064 369248 369158 350705 369260 350224 369104 369507 369025 369032 369155 357028 369201 369240 369007 369173 369363 369543 N. 3 Amp Fuse.International . NAT & LP Pilot Shut Off Valve Temperature Control Valve Main Burner Orifice. Extension Pilot Shield. LP Burner Ignitor Flame Target 0. A 369531 369366 369331 369193 369167 369172 369029 369108 369300 369263 369393 369344 369006 369072 369099 369144 369202 369075 369073 369100 369076 369142 369154 369124 369535 369067 369152 DESCRIPTION Shaft Lock Ring Fuse Holder Fuse Holder Fuse. O P Q R S T U V W X Y Z AA BB CC DD EE FF GG HH II JJ KK LL MM NN OO 84 Impinger I -–1000 Series Service Manual . Natural Gas Main Burner Orifice. Cooling Fan Air Switch Tube Oven Conveyor Control Pot. 24 VAC Cooling Fan Thermostat SEE PAGE 104 Blower Air Switch Relay Conveyor Motor Control Board Fuse. NAT/LP Ignition Control. LP Pilot Shield.40VA Burner Blower Motor Kit Finger Guard. 230/460/575 See Burner Blower Motor .PARTS / MODEL 1002-1003.7 Amp Circuit Breaker Cooling Fan.Page 55 Transformer. Top LH Transformer. 120/24V . L. Digital Display Temperature Gauge Thermostat Knob (Degree F) Thermostat Knob (Degree C) Gas Valve (Body Only). 10 Amp Conveyor Speed Control Dial (Non-Digital Display Ovens) Knob 10 Tooth Sprocket . International 85 .BLOW UP / 1002. 1003 – S/N 4390 & ABOVE Impinger I -–1000 Series Service Manual . Main Flame Sensor Pilot Orifice. Cooling Fan Air Switch Tube Oven Conveyor Control Pot. O P Q R S T U V W X Y Z AA BB CC DD EE FF G G HH II JJ KK LL MM NN OO PP 86 Impinger I -–1000 Series Service Manual . 369344 369006 369072 369099 369144 369202 369075 369073 369100 369076 369142 369154 369378 369535 369067 369152 DESCRIPTION Shaft Lock Ring Fuse Holder Fuse. Yellow Pilot Light. 369531 369366 369331 369193 369167 369172 369108 369300 N. LP Pilot Shield.L. 4 Amp.PARTS / MODEL 1006 LETTER A B C D E F G H I J K L M N P/N 369247 357107 369013 369014 369248 369158 350705 369260 350224 369104 369025 369507 369032 369155 357028 369201 369240 369007 369902 369173 369363 369543 N. 250V Hi Hat Temperature Sensing Switch Sensing Rod Kit Control Transformer Unit Relay Cover. A. 24 VAC Blower Air Switch Cooling Fan Thermostat SEE PAGE 104 Relay Conveyor Motor Control Board Fuse.S/N 4390 & Above Switch.7 Amp Circuit Breaker Fan Motor.40VA Burner Blower Motor Kit Finger Guard. Natural Gas Main Burner Orifice. Natural Gas Pilot Orifice. 120/24V . 3 Amp Fuse.International . Extension Pilot Shield. LP Burner Ignitor Flame Target 0.Page 55 Transformer. 230 VAC Cord Set. L.A. 230/460/575 VAC See Burner Blower Motor . 1 A 250V Fuse. Digital Display Thermostat Knob (Degree F) Thermostat Knob (Degree C) Gas Valve Pilot Shut Off Valve Temperature Control Valve MAKE FROM 369067 Main Burner Orifice. 10 Amp Knob 10 Tooth Sprocket . Non Delay. Top LH Transformer. Cooling Fan Thermistor Probe Set Switch Assy. ON/OFF Double Pole Fan Switch Lens. International 87 .BLOW UP / 1006 Impinger I -–1000 Series Service Manual . Temperature Control Potentiometer. Temp.International .S/N 4389 & Below and Q19078 & Above 10 Tooth Sprocket . Yellow Neon Pilot Light.S/N 4390 to Q19077 Switch. 125 VAC Blower Air Switch Motor. 1A 250V Fuse. 3 Amp Knob Conveyor Speed Control Dial (Non-digital Display Ovens) Sprocket.PARTS / 1028-1029-1032 LETTER A B C P/N 369247 357107 369014 369335 369195 369304 369013 369248 369064 369066 369158 369260 369605 350224 369128 369025 369022 369113 369114 369115 369302 354258 369127 369368 369154 369118 369007 369902 369119 369134 369155 369008 369640 357028 369201 369240 369193 369167 370046 369172 369029 369342 369340 369132 369173 369131 369032 369124 DESCRIPTION Shaft Lock Ring Fuseholder Fuse. 50A Conveyor Motor Control Board S/N 4390-Q19077 Conveyor DC Control Board . Control Box D E F G H I J K L M N O P Q R S T U V W X Not Shown Y Z AA BB CC DD EE 88 Impinger I -–1000 Series Service Manual . S/N Q19078 & Above Fuse. Non Delay. 50A. 10 Amp Fuse MDL Time Delay. Drive . ON/OFF Transformer (Stepper) Lens.7 Amp Circuit Breaker Power Terminal Block Temperature Sensing Switch Sensing Rod Kit 60A Fuseholder Fuse. 4 Amp. 120V Transformer. 1 Amp FNM1 Fuseholder for FNM1 Fuse Fuse. 250V Hi Hat Thermistor Probe Set Switch Assy.Conveyor S/N 4389 & Down See Pg 104 S/N 4390 & Up Brush (For 369022) Brush Cap (For 369022) Brush Spring (For 369022) Contactor. 1 Amp Fuse. 230V-115V Hi Limit Thermostat Hi Limit Thermostat--Bulb & Capillary 0. Button Only Digital Display Temperature Gauge (Non-digital Display Ovens) Uses 369009 Thermocouple Knob.S/N 4389 & Below Control Stepper. Relay Cooling Fan. Control & Harness Temperature Control Board Control Transformer Thermocouple Probe Assy. International 89 . 1029.BLOW UP / 1028. 1032 Impinger I -–1000 Series Service Manual . 3 Pole 4” Cover. Asco Valve Connector. Harness Oven Conveyor Control Pot. Hi-Limit Ignition Control. 2 Way Valve Main Burner Orifice Nat. Potentiometer Burner Blower Motor S/N 17170 & Below Burner Blower Motor. 230/460/575 VAC Conveyor motor Control Board. Stepper 90 Impinger I -–1000 Series Service Manual . S/N 17170 & Below Control. Yellow Cooling Fan Thermostat 10 Tooth Sprocket See Page 104 0. 3 Amp Fuse. 220 VAC Temperature Control (Thermostat) Junction Box Terminal. Ignitor Sensor Probe Pilot Light. 10 Amp Double Pole Fan Switch Lens.International . Stepper Control S/N 17171 & Above Fan Motor. Speed Pot.. 220V S/n 17171 & Above Coil. Multi – Block Solenoid.PARTS/ MODEL 1030 LETTER A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AA BB CC DD EE FF GG HH II JJ KK LL MM NN OO PP QQ RR Not Shown P/N 369247 369248 357107 369013 369014 369260 350224 369507 369158 369154 369007 369902 369032 369575 369543 369155 369640 369240 369381 369173 369574 369579 369331 369368 369573 369728 369085 369736 369398 369572 369167 369172 350225 369522 369520 369366 369589 369548 369571 369570 369580 369542 369590 369382 369152 369391 369378 369605 DESCRIPTION Shaft Lock Ring Knob Fuse Holder Fuse. Thermostat – Thermologic Thermologic.7 Amp Circuit Breaker Temperature Sensing Switch Sensing Rod Kit Relay Differential Air Pressure Switch Transformer. Red Knob. Junction Box-Blank Burner Shutdown Light Set Switch Assy. 3 Pole Gas Valve. Digital Display Lens. 4 Pole Connector. 230 VAC Transformer. Cooling Fan Thermostat. Stepper S/N 17171 & Above Hi-Hat Fan Relay Control Transformer Spark Generator Alarm (Burner Shutdown) Finger Guard. International 91 .BLOW UP / 1030 Impinger I -–1000 Series Service Manual . PARTS / 1042. Cooling Fan Junction Box Terminal Lug 4” Cover. LP Gas Burner Igniter Flame Target Burner Blower Motor Kit Transformer. 230/460/575 VAC Conveyor Motor Control Board – S/N 4390 – Q14970 Control. Nat. Gas Main Burner Orifice. Button only Digital Display Knob. junction Box-Blank Pot. Temperature Adjustment w /Faceplate Set Switch Assy. 10 Amp Double Pole Fan Switch Lens. NAT/LP Pilot Shut Off Valve Pilot Line Assy. Nat. 1043 LETTER A B C D E F G H I J L M N O P Q R S T U V W X Y Z AA BB CC DD EE FF GG HH JJ KK LL MM NN OO PP QQ P/N 369378 369247 369248 357107 369013 369014 369260 350224 369067 369507 369158 369066 369025 369032 369543 369155 369640 369240 369173 369007 369902 369154 369393 369331 369085 353082 369398 369317 369167 369046 369172 369316 369263 369344 369086 369398 369072 369099 369144 369202 369075 369073 369100 369076 369142 369366 369531 369270 DESCRIPTION Fan Motor. 120/24V – 40 VA Electronic Temperature Control 92 Impinger I -–1000 Series Service Manual . S/n Q14971 & Above Hi-Hat Control Transformer Temperature Sensing Switch Sensing Rod Kit .International . NAT & LP Main Burner Orifice. Main Flame Sensor Pilot Orifice. 3 Amp Fuse. 230 VAC Shaft Lock Ring Knob Fuse Holder Fuse. LP gas Pilot Shield. Extension Pilot Shield. S/N 121 & Above Solenoid Valve. Stepper.. Yellow Air Switch Tube Cooling Fan Thermostat 10 Tooth Sprocket.7 Amp Circuit Breaker Ignition Control NAT/LP Finger Guard. Gas Pilot Orifice.. Temperature Adjustment Gas Valve (Body Only).See Page 104 Blower Air Switch Relay Transformer. ½” – S/n Q14971 & Above . S?n 4390 – Q14970 Sprocket. International 93 . 1043 Impinger I -–1000 Series Service Manual .BLOW-UP / 1042. Nat.Pole Connector. Extension Pilot Shield. 1034. 3 Amp Fuse. Nat & LP Gas Thermistor Probe Time/Temp Display Temperature Control Thermocouple Main Burner Orifice.Pole Solenoid Valve. Nat.International . 1047 LETTER A B C D E F G H J K L M N O P Q R S T U V W X Y Z AA BB DD EE FF GG HH JJ KK LL MM NN OO PP QQ RR SS TT UU P/N 369247 369248 357107 369013 369014 369603 369066 369260 350224 369572 369507 369422 369253 369605 369508 369640 369173 369543 369368 369331 369579 369574 369573 369771 369580 369571 369570 369398 369193 369172 369801 369131 369072 369099 369144 369202 369075 369073 369100 369076 369142 369589 369736 369737 369575 369124 369391 369898 DESCRIPTION Shaft Lock Ring Knob Fuse Holder Fuse. Stepper Control Timer. 10 Tooth On/Off Lens. Main Flame Sensor Pilot Orifice. Conveyor Flame Monitor. LP Gas Pilot Shield. Stepper Transformer. 240V Relay. 20 Minute Control. 4. Hi-Limit Finger Guard Alarm Spark Generator Ignition Control Push Button Switch Gas Valve (Multi Block) Connector. Sprocket.PARTS / 1033. LP Gas Burner Igniter Flame Target Burner Blower Motor Magnet Sensor. Gas Pilot Orifice. Power Thermostat. Yellow Burner Light Cooling Fan Thermostat Relay. 120V Transformer. Control Transformer. Gas Main Burner Orifice. 10 Amp Motor. 3. 1033/ 1034 94 Impinger I -–1000 Series Service Manual . Hall Effect Differential Air Pressure Switch Cooling Fan Potentiometer. 1046. Gear Box Assy. 1034. 1047 Impinger I -–1000 Series Service Manual .International 95 . 1046.BLOW-UP / 1033. "A" S/N 14974 & Below Speed Pot. Yellow Neon Pilot Light.PARTS / 1228-1229 LETTER A B C P/N 369247 357107 369013 369014 369335 369248 369252 369260 350224 369128 369025 369302 354258 369127 369118 369007 369902 369119 369134 369193 369167 370046 369172 369342 369340 369132 369131 369173 369032 369124 369535 369067 369253 369254 369652 DESCRIPTION Shaft Lock Ring Fuse Holder Fuse.. Control &Harness Temperature Control Board Thermocouple Probe Assy. "B" S/N 14974 & Below Speed Pot. 1 Amp Knob Paddle Switch Switch. 50A. 125 VAC Blower Air Switch Contactor. Temperature Control Potentiometer. Button Only Digital Display Knob. 50A Thermistor Probe Set Switch Assy. Control Box Cord Set. (Stepper) S/N 14974 & Above D E F H I J K L M N O Q R S T U V W X Y Z AA BB CC DD 96 Impinger I -–1000 Series Service Manual . 120V Transformer. 10 Amp Fuse MDL Time Delay. 230V-115V Hi Limit Thermostat 60A Fuseholder Temperature Sensing Switch Sensing Rod Kit 60A Fuseholder Fuse..International . Cooling Fan Air Switch Tube Speed Pot. Temp. Control Transformer Relay Cooling Fan. ON/OFF Lens. 3 Amp Fuse. 1229 Impinger I -–1000 Series Service Manual .International 97 .BLOW UP / 1228. 3 Amp Fuse. 40 VA Temperature Control 98 Impinger I -–1000 Series Service Manual . 1243 LETTER A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AA BB CC DD EE FF GG HH II JJ KK LL MM NN OO PP QQ P/N 369247 357107 369013 369014 369248 369252 369260 350224 369131 369507 369025 369032 369363 369543 369173 369393 369331 369366 369317 369193 369167 369172 369316 369263 369344 369086 369398 369072 369099 369144 369202 369075 369073 369100 369076 369142 369933 369007 369902 369944 369067 369104 369652 369378 369531 369270 DESCRIPTION Shaft Lock Ring Fuse Holder Fuse.6 VAC Ignition Control Finger Guard Burner Blower Motor Temperature Control Pot. Yellow Thermocouple Thermostat. & LP Main Burner Orifice. Burner Temperature Sensing Switch Rod. Gas Main Burner Orifice. Nat. Extension Pilot Shield. Cooling Fan Air Pressure Switch Relay Cover. LP Gas Pilot Shield. Gas Pilot Orifice. Relay Transformer. 12. Cooling Fan Control Box Transformer.International .PARTS / 1242. Assy. 24 VAC Conveyor Pot. 120/24. On/Off Lens. LP Gas Burner Igniter Flame Target Flange. Nat. Main Flame Sensor Pilot Orifice. Sensing Kit Washer Air Switch Tube Pilot Light. Power Transformer. Display Temperature Dial Gas Valve Nat/LP (Body Only) Pilot Shut-Off Valve Pilot Line Solenoid Valve Nat. Thermister Set Switch Time/Temp. 10 Amp Knob Paddle Switch Switch. International 99 .UP / 1242.BLOW . 1243 Impinger I -–1000 Series Service Manual . S/N 4612 & Below Motor Cooling Fan Wire Form.S/N 4613 & Above Rod. 369026 369215 369028 369020 369027 369545 369547 369318 369321 DESCRIPTION Motor and Fan Cover Motor.A.International .L. Fan Assy. Fan Assy. with New Style Oven back Assy.A.PARTS / OVEN BACK – GAS LETTER A B C D E F G H I J K L M N Not Shown Not Shown P/N 369048 369212 369214 369192 369045 369306 369646 369647 369213 N.S/N 4612 & Below Oven Fan Motor. . 16" Fan.L.L. Cone Conversion Kit 50 HZ Replaces N. S/N begins with a "Q" See Page 108 See Conversion Kits Below Heat Slinger Bar Motor Support Assy . S/N begins with a"Q" Motor.S/N Q4613 & Above Motor Mount Support Assy. 240V Capacitor 7. 50 Hz. Thermostat Bulb Wire Form. Thermostat Bulb -1040 Series Cone Conversion Kit 60 HZ Replaces N. . 100 Impinger I -–1000 Series Service Manual . Stand Off Inlet Panel.S/N 4612 & Below Oven Back Assy.5 MFD. with New Style Oven Back Assy.A. 370 VAC Oven Back. BLOW UP / OVEN BACK – GAS Impinger I -–1000 Series Service Manual .International 101 . A.S/N Q4767 & Below Motor Cooling Fan Wire Form. .PARTS / OVEN BACK. Cone Conversion Kit 240V 50 HZ Replaces N. F G H I J K L M N O Not Shown Not Shown Not Shown Not Shown 102 Impinger I -–1000 Series Service Manual .S/N Q4768 & Above Motor Mount Support Assy. 16" Fan. Fan Assy. 50 Hz. Thermostat Bulb.A 369646 369026 369215 369028 369020 369027 369547 369319 369320 369322 369323 DESCRIPTION Rear Cover Assy. 240V Capacitor 7.L. with New Style Oven Back Assy. Stand Off Heat Slinger Bar Motor Support Assy .5 MFD.International . .A. with New Style Oven Back Assy Cone Conversion Kit 240V 60 HZ Replaces N.A.S/N Q4767 & Below Oven Fan Motor.A. with New Style Oven Back Assy. Fan Assy. 370 VAC Oven Back Assy.L.L. Fan Assy.S/N 4768 & Above 240V Heating Element 208V Heating Element 220V Heating Element Inlet Panel. Fan Assy. S/N begins with a "Q" Motor. Cone Conversion Kit 220V 50 HZ Replaces N. S/N begins with a "Q" See Detail Page 108 See Conversion Kits Below Rod.L.Electric Ovens Cone Conversion Kit 208V 60 HZ Replaces N.ELECTRIC LETTER A B C D E P/N 369699 369212 369214 369192 369307 369122 369287 369315 369647 369213 N.L. Motor. with New Style Oven Back Assy. International 103 .BLOW UP / OVEN BACK – ELECTRIC Impinger I -–1000 Series Service Manual . PARTS / CONVEYOR MOTOR ASSEMBLY S/N 4390 & ABOVE LETTER A B C D E F G H I J K L M N O P Q R S T U P/N 369291 369384 369294 369296 369290 369151 369146 369294 369292 369297 369156 369293 369150 369298 369299 350247 369295 369603 369737 369900 369658 369736 DESCRIPTION Motor, DC - Conveyor Motor Brush Assy. #4 Lockwasher Screw, 4-40 x 1/4 Optical Encoder Assy. Coupling and Encoder Disc (.050 in. Allen Wrench included) Hex Nut, 4-40 #4 Lockwasher Bracket, Tach. Generator Screw, 6-32 x 1/4 #6 Lockwasher Screw, 4-40 x 3/8 Tach. Generator Dust Cover Bushing Screw, 10-32 x 3/8 #10 Lockwasher Stepper Motor Gearbox Assy. - includes R, S, T, U Hall Effect Sensor #8 Lockwasher Screw, 8-32 x 1/4 Magnet 104 Impinger I -–1000 Series Service Manual - International BLOW UP / CONVEYOR MOTOR ASSEMBLY S/N 4390 & ABOVE Impinger I -–1000 Series Service Manual - International 105 PARTS / SERIES 1000 – CONVEYOR LETTER A B C D E F G H I J P/N 369002 369314 369835 369312 369160 369641 369220 369005 369237 369161 369066 369413 369219 369644 369206 369163 369362 369143 369036 N.L.A. 369380 369060 369037 369034 369035 369042 369039 369038 369043 369059 369040 DESCRIPTION Tension Knob, Conveyor Roll, Conveyor-Notched Conveyor Frame Assy. Conveyor Shaft, Idler Conveyor Pan Stop Idle Bearing Bracket Idle Bearing Conveyor Belt Connecting Link Conveyor Drive Shaft Roller Chain Sprocket, S/N 2164-Q14973 (Gas) S/N 2164-Q19077 (Electric) Drive Sprocket S/N Q14974 & Above (Gas) S/N Q19078 & above (Electric) Drive Key Rod End, Female Screw 1/2-20 x 3/4 Crumb Pan Conveyor Belt Conveyor Belt by Foot Crumb Pan Drive Bearing Assy. Conveyor Frame (Replace with 369117 Complete Conveyor Assy.) Conveyor Guard Strap L.H. Conveyor Guard Assy. Snap Ring L.H. Conveyor Idler Bearing Assy. R.H. Conveyor Idler Bearing Assy. Idler Shaft Blank Drive Gear Notched Drive Gear Drive Shaft R.H. Conveyor Guard Assy. Conveyor Sprocket (Uses 369042 Key K L M N O P Q R S T U V W X Y Z AA BB 106 Impinger I -–1000 Series Service Manual - International International 107 .BLOW UP / SERIES 1000 CONVEYOR Impinger I -–1000 Series Service Manual . 3 Amp Hi Hat Conveyor Motor Control. 1A 250V Fuse. Non Delay. 1A 250V Fuse. Chain Guard Cooling Fan. L. 5/8" .CONVEYOR CONTROL LETTER A B C D E P/N 369012 369013 369240 369155 369640 357028 369201 369272 357028 369201 369154 N. 1/2" (Stepper) S/N Q14791 & Above Clip.PARTS / SERIES 1200 . 4 Amp.S/N Q14791 & Below Sprocket. 250V Conveyor Motor Control "B" S/N Q4613 to Q14973 Fuse. 4 Amp. 250V 0.International . Non Delay.7 Amp Circuit Breaker Chain Guard Sprocket. 369665 369289 369242 369696 369124 369605 DESCRIPTION SEE PAGE 104 Fuseholder Fuse. "A" S/N Q4613 to Q14973 Conveyor Control (Stepper) S/N Q14974 & Above Fuse. Control Box Transformer (Stepper) F G H I J K L M 108 Impinger I -–1000 Series Service Manual .A. BLOW UP / SERIES 1200 – CONVEYOR CONTROL Impinger I -–1000 Series Service Manual .International 109 . .International . Outer Conveyor Pan Stop Nut. Long (Stepper Drive) Drive Chain. Short(Stepper Drive) 110 Impinger I -–1000 Series Service Manual . Long Drive Chain. Inner Flanged Bearing. SS #10 Compression Spring Crumb Pan Complete Conveyor Belt Drive Chain. Outer Outer Drive Shaft Sprocket 3/4" Bore Sprocket 1/2" Bore Conveyor Belt Connecting Links Idler Shaft. Inner Collar Shaft Spacer Blank Drive Gear Roll. Notched Idler Shaft.PARTS / SERIES 1200 – CONVEYOR LETTER A B C D E F G H I J K L M N O P Q R S Not Shown Not Shown Not Shown Not Shown P/N 369277 369275 369276 369274 369279 369278 369241 369242 369005 369280 369284 369039 369038 369281 369160 350238 369697 369282 369206 369273 369249 369250 369817 369818 DESCRIPTION Retaining Block. 10-24 Lockwasher. Conveyor. Short Drive Chain.75 ID Retaining Block. .50 ID Inner Drive Shaft Flanged Bearing. BLOW UP / SERIES 1200 – CONVEYOR Impinger I -–1000 Series Service Manual .International 111 . Lincoln Foodservice Products.S.International . Indiana 46804 United States of America Telephone: (260) 459-8200 U. Facsimile: (888) 790-8193 Int’l Facsimile: (260) 436-0735 Technical Support Hotline: (800) 678-9511 www.com 112 Impinger I -–1000 Series Service Manual . LLC 1111 North Hadley Road Fort Wayne.lincolnfp.
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