ML434-V12-D758

D758 MiniPurge ManualML 434 IMPORTANT NOTE It is essential for safety that the installer and user of the Expo system observe the following instructions: Please refer to the standard for principles and definitions. (N.B. These instructions apply only to the Pressurizing system. It is the responsibility of the manufacturer of the Pressurized Motor Enclosure to provide appropriate instructions for the Enclosure.) Contents 1. D758 MiniPurge - General System Specification 2. Quick User Guide 3. Application Suitability 4. Description and Principle of Operation 5. Main Components 6. Installation of the System 7. Commissioning 8. Maintenance of the System 9. Fault Finding 10. Recommended Spares List 11. Drawings and Diagrams 12. Certificates ML434 v12 Issued 31/8/10 © Page 1 of 17 1. D758 MiniPurge - General System Specification Pressurized Motor Housing Pressurized Motor Enclosure : A range of Electrical Motor housings Classification : Zone 1 Group IIC Total Purge Flow Rate : To be determined by customer and to include flow to compensate for leakage. Estimated Purge Time : To be determined by motor manufacturer dependent on the flow rate selected & motor volume. Time may also be verified by a Purge Test when required. Enclosure Pressure : Normal : 10mbarg. (Alternative set-points are available) This is also the set point of the Automatic Leakage Compensation Pressure Sensor (CLAPS Sensor). : Relief Valve opening pressure, Calibration range = 20 – 50mbarg Enclosure Test Pressure : Motor Test pressure = Relief Valve opening pressure x 1.5. MiniPurge Control Unit Data Special Design Number: D758SYS Model Number : 5XLC/ss/OV/PA/PC Option codes : OV = Outlet Valve is pneumatically operated PA = Integral Ex e Power & Alarm terminal box PC = Pressurized Enclosure (Motor) Pressure Control Automatic Leakage Compensation Valve (CLAPS system) Action on Pressure Failure : Alarm and Trip (Isolate power / motor) User adjustable “Alarm Only” System Type : ThinMani MiniPurge System Type of Operation : Automatic Leakage Compensation using the “Closed Loop Automatic Pressurization System” (CLAPS) Leakage Compensation capacity : 1500Nl/min @ 5barg inlet pressure Leakage Compensation over capacity : +40% (minimum) of the normal enclosure leakage Enclosure Material : Stainless Steel 316 Mounting method : Wall mounting straps & spacers. Fixing holes as per drawing. Temperature Limits : -20ºC to +55ºC Supply Pressure : Clean Dry Oil Free Air or Inert Gas. Pressure 5 – 8 barg (75 – 120 psig). 50 micron automatic drain supply Inlet Filter and 16 barg regulator fitted. Logic Regulator & Gauge : Fitted. Set to 2.1 barg (31 psig). Process Connections : Purge Supply and Outlet to Motor:1” NPT female Minimum Supply Line 25mm (1”) I.D Tube Reference points & signals: 1/8” NPT female Visual Indicators : Alarm/Pressurized (“Red” / Green) : System Purging (Black / “Yellow”) Manual/Override Switch : Not fitted. Motor Interlock Switch : DPNO electrical switch, contact ratings 250Vac 4Amps certified, Ex d IIC T6 System Purging Switch : SPNO electrical switch, contact ratings 250Vac 4Amps certified, Ex d IIC T6 Alarm Switch : SPNO electrical switch, contact ratings 250Vac 4Amps certified, Ex d IIC T6 Intermediate Switch : SPNO electrical switch, contact ratings 250Vac 4Amps certified, Ex d IIC T6 Signal Junction box : Stainless Steel, Ex e II T100ºC IP66 c/w terminals, front access cover & lower removable gland plate. Sensors (-0, +0.7 mbar) : Minimum Pressure calibration range: Minimum : 0.5 mbarg Maximum : 5.0 mbarg Default setting: 1.5 mbarg Other Sensors (-0, +10%) : Intermediate Sensor calibration range: Minimum : 2.0 mbarg Maximum : 10.0 mbarg Default setting: 5.0 mbarg : Purging Flow OK set at 6.4 mbarg : CLAPS Sensor calibration range: Minimum : 5.0 mbarg Maximum : 15.0 mbarg ML434 v12 Issued 31/8/10 © Page 2 of 17 Default setting: 10.0 mbarg NOTE: There must be a 1.5 mbarg difference between the Minimum Pressure & Intermediate Sensor and a 2.5 mbarg difference between the Intermediate & CLAPS Sensor calibration point. e.g. Minimum Pressure = 5 mbarg, Intermediate Pressure = 6.5 mbarg, CLAPS Sensor = 9 mbarg ML434 v12 Issued 31/8/10 © Page 3 of 17 4000. Approvals :ATEX Certificate: 0518 Sira 01ATEX1295X II 2 (2) G D Ex [px] II T6 Ex pD II 21 T85ºC Tamb -20ºC +55ºC IECEx Certificate: IECEx SIR07. 15 or 20 Minutes (-0 + 25%).4lb) Options Part Number KGM-PR00-008 KMP-1SP0-001 Description Extended timer option for additional 60 minute timer. Weight : 27kg (60lb) Relief Valve (RLV) / Purge Outlet Valve with Integral Spark Arrestor Type : RLV104/FS/ss Special Design Number: D758RLV Bore : Purge Outlet Valve Ø104 mm. -20%) : Maximum 50. Relief Valve Ø75 mm Relief Valve lift–off calibration : Minimum 20. Giving a maximum available purge time period of 45 minutes. (see drawing AGM-PA00-021) SPNO electrical switch.0 mbarg. 3-off time increments available. 10. finish as Control Unit : Gasket : Neoprene : Spark Arrestor Stainless Steel mesh Mounting method : Rectangular cut-out & fixing holes as per drawing.0 mbarg : Default 30. 5000 or 6000 Nl/min.0027X Ex [px] II T6 Ex pD II 21 T85ºC Tamb -20ºC +55ºC For limitations and conditions of use refer to the applicable certificate at the back of this manual. contact ratings 250Vac ML434 v12 Issued 31/8/10 © Page 4 of 17 . Default 2000 Nl/min Material : Housing: Stainless Steel 316L. Default set to 45 Minutes.0 mbarg Flow rate : Factory set to 2000. 3000. System Purging switch option kit.Purge Time : User selectable. Weight : 7kg (15. (+0%. If the checks have been made and the system will still not work then please contact your local distributor or EXPO. for the set purge time. No longer in the purge mode Check that the purge time required has been met or exceeded by the actual purge time recorded. Note: Most faults are due to the air supply being restricted. via the Spark Arrestor Indicator Alarm/Pressurized Purging • Colour Green Black Status Pressurized.” If an obvious problem has not been highlighted and corrected then follow the checks in the section “Fault Finding”. Start a stopwatch when the Purging Indicator turns “Yellow”. Stop the stopwatch when the Purging Indicator turns “Black”. Quick User Guide Installation • Mount the purge system as shown on the Hook-Up drawing. • Always ensure all piping is clean and free of dirt & debris prior to connection to the purge system or enclosure. Purge Outlet Valve will open o the air will then exit the Relief Valve housing. the air supply pipe work installed being too small or a drop in air supply pressure during purge. • System is now in Leakage Compensation mode and working correctly If the system has not worked as expected check the installation thoroughly. Indicator Colour Alarm/Pressurized Green Purging Black Status Pressurized and in Leakage Compensation mode. • Always ensure the system has been installed as per the full instructions in section of this manual titled ‘Installation of the System’. ML434 v12 Issued 31/8/10 © Page 5 of 17 . Operation of the System • Once installed correctly turn on air supply. The actual purge time recorded must NEVER be less than the purge time required. enclosure pressure too low Purge flow too low. Enclosure pressure has been attained Purge flow too low Once enough purge air flow is measured the system will start the timed purge cycle. (or not in the purge mode) Status Pressurized Purge Flow above the minimum After the purge has been completed without interruption. Read the section in this manual called “Commissioning. the system will show Purge Complete. Indicator Colour Alarm/Pressurized Red Purging Black • Purge system starts off in purge. o the purge air will enter the enclosure o within the Relief Valve unit.2. • Strongly recommend a local isolation valve on the air supply to the purge system is installed. Indicator Colour Alarm/Pressurized Green Purging Yellow • Status Pressure Alarm. above ground) and the hazard is caused by flammable gasses. Before power can be switched on. Description and Principle of Operation The MiniPurge system is pneumatic in operation. External flammable gas cannot enter the enclosure while it is pressurized. a warning label must be fitted to the Pressurized Enclosure (PE). Where other inert compressed gasses are used (Nitrogen. Clean uncontaminated compressed air. where the Hazardous Area is nonmining (i. If substances that will adversely affect any of these materials are present in the surrounding environment. with electric interfaces. The certification documentation supplied with any such devices must be checked to ensure their suitability. The duration of the “purging” time is normally ascertained on an electrical motor by performing a “Purge Test”. This system is designed for use primarily with compressed air. apparatus associated with the MiniPurge system. Materials of construction: • Stainless Steel • Mild (carbon) Steel • Brass • • • Aluminum Nylon Polyurethane • • • Acrylic Silicone Rubber Neoprene 4. The Purge Outlet Valve is closed and the flow of purging air is reduced to a level where there is enough flow of air to compensate merely for the leakage of air from the enclosure whilst maintaining the minimum over-pressure state.e. The following materials are used in the construction of MiniPurge systems. vapors or dust. from a nonhazardous area is admitted to the motor enclosure to keep the internal pressure at least 0. “Purging” is the action of replacing the air inside an enclosure with air known to be free of flammable gas. Where a risk of asphyxiation exists. or an inert gas. Consult the Control of Substances Hazardous to Health (COSHH) data sheet for the gas used. the motor may be used safely in a hazardous environment. the systems may be used in IECEx and ATEX Zone 1(21) and Zone 2(22) . Application Suitability MiniPurge Systems are certified for use in Hazardous Areas. for example) the user must take suitable precautions so that the build up of the inert gas does not present a hazard to health. is free of flammable gas. such as intrinsically safe signaling circuits and flameproof enclosures containing switching devices may be limited in their gas group. With the utilization of the Expo MiniPurge system. the enclosure must be “purged” to remove any flammable gas that might have entered the enclosure before it was pressurized. for example the motor housing.5 mbar above the pressure outside. MiniPurge systems may be used for hazards of any gas group. However. At the end of the “Purging” cycle the system automatically switches to Leakage Compensation mode. Pressurization is simple. Interface contacts are provided within the system to provide an interlock to the motor control gear. “Pressurization” is a method of protection used in Zone 1 and Zone 2 Hazardous Locations to ensure that the interior of an electrical enclosure. In the event of pressure failure within the motor housing the system will raise an alarm in the form of visual indicators and a volt free contact depending on the specification of the system.Categories 2 and 3 respectively. please consult Expo for further guidance.3. Depending on the model. The default action on loss of pressurization by the MiniPurge is “Alarm and Automatic Disconnect of ML434 v12 Issued 31/8/10 © Page 6 of 17 . 1 barg (31 psig) and can be verified by means of the integral pressure gauge. Also connected to the reservoir is the pilot port of the “Timer Selector Valve”. It should only be adjusted if the gauge indicates that the regulated pressure is incorrect. Purge Flow Sensor. above the minimum pressure specified for safe operation. When the PE pressure is correct and the correct Purge Flow is taking place. a signal is sent to the Purge Timer to start the timing period.Power” (A&T – Alarm and Trip). This valve receives the signal from the purge timer when the purge time has been completed and checks that “Pressurized” signal is also still present. The pressure level is factory set to 2.5 barg (36 psig). Logic Manifold: This black block contains most of the logic components in the system and can be thought of as a pneumatic printed circuit board. It incorporates the following major items: Minimum Pressure Sensor. Logic Air Supply Regulator: This device provides the system with a stable logic pressure supply for consistent operation. If both conditions are satisfied. The sensor is factory calibrated to operate on a falling pressure at or above the minimum specified pressure. During purge you may notice the pressure drop down to 2.e. the sensor provides a “Purging” output signal that can be seen by the operator. please refer to Section titled ‘Main Components’ . The pressure inside the PE is monitored continuously by this device. Main Components Air Supply Filter/Regulator: The unit is provided with a 50-micron liquid / dust filter element as a precaution. When the pressure is correct i. This can be changed by the customer to “Alarm Only” (AO). displayed on the Black / "Yellow" visual indicator. This should indicate no less than 5 barg (75 psig). the timer valve provides a signal to the “Purge Complete” Valve. The regulator is factory set to 5 barg (75 psig) and will regulate the pressure of an air supply between 5-16 barg (75-240 psig). The purge flow through the Relief Valve (RLV) / Purge Outlet Valve is monitored by this device. above the minimum purge flow specified for correct purging. a “Purge Complete” output signal is produced which is sent to perform the following functions: turn on the electrical supply to the PE. It has internal passageways that interconnect the components with facilities for connections to the off-manifold items. The user of the MiniPurge system must ensure that air supply is to the quality stated in ‘Air Supply Quality' paragraph found in the Installation section. The resulting bleed of air is collected by a calibrated reservoir where the pressure gradually rises. This system has been specifically designed to maintain a stable internal motor pressure during motor start-up when pressure peaks or drops are particularly prevalent or when changes in pressure are caused by running temperature variations. When the purge flow is correct i. the sensor provides a “Pressurized” output signal that can be seen by the operator. The sensor is factory calibrated to operate on a falling flow rate at or above the minimum specified purge flow rate. The signal passes through a dedicated in-line mini-filter to a ruby flow restrictor.e. displayed on the Red / “Green” visual indicator. A pressure gauge is fitted down stream of the filter.“Alarm Only” circuit. When the pre-set purge time has elapsed and the reservoir pressure has risen to the timer valve operating pressure. 5. “Purge Complete“ Valve. Purge Timer. turn off the high purge flow and start ML434 v12 Issued 31/8/10 © Page 7 of 17 . The Motor MiniPurge system incorporates a "Closed Loop Automatic Pressurization System" (CLAPS) whereby the system will detect a fall or rise in the motor internal pressure & automatically compensate by increasing or decreasing the leakage compensation flow rate into the motor. the minimum specified purging outlet flow rate +10% and the expected leakage rate from the PE during purging. is the responsibility of the user.the “Leakage Compensation” mode. When either the “Timed Out” signal or the “Purge Complete” signal is present it allows the pilot signal to be applied to the “Purge Complete” Valve. The cable from the switch is terminated in an “Ex e II T100ºC (Tamb -200C to +550C) IP66” junction box.g. In certain circumstances. The cable from the switch is terminated in an “Ex e II T100ºC (Tamb 200C to +550C) IP66” junction box. (a ball valve) valve is placed upstream of the Purge Valve to restrict the purge flow to the minimum required. The decision to use the “Alarm Only” facility. the Purge Valve is closed by the “Purge Complete” signal and then waits in the closed position until the next purging cycle is needed. The cable from the switch is terminated in an “Ex e II T100ºC (Tamb -200C to +550C) IP66” junction box. when it is known there are potential explosive hazardous gases in the area. Intermediate Switch: A Flameproof “Ex d II” Power Switch is located off the logic manifold. where local codes of practice allow. The user must respond to the Alarm and either restores the pressure to the PE or otherwise make the installation safe e. It is sized to allow sufficient air into the enclosure during purging based on the specified air supply pressure range. A Purge Flow Restrictor. and the length of time during which the enclosure is allowed to operate un-pressurized. Motor Interlock Switch: A Flameproof “Ex d IIC” Power Switch is located on the logic manifold which also contains the pneumatic actuating piston. It will also provide a hold-on signal to maintain the system in “Leakage Compensation” mode with the power switch on even when the Purge Timer has reset ready for the next purge cycle whenever it is required. System Purging Switch: This option is an “Ex d II” device operated by the “Purge Flow” signal and provides the facility for a remote electrical system status indicator to show “System Purging” (sometimes called Purge in Progress). This Purge Flow Restrictor is factory set but can be re-adjusted during commissioning if required. “Or” Gate. CLAPS Sensor: This sensor monitors the pressure within the motor and then sends a proportional control signal to the “CLAPS Leakage Compensation Valve” to either increase or decrease the flow of air into the ML434 v12 Issued 31/8/10 © Page 8 of 17 . This device provides the Purge Complete Valve with its hold-on function referred to above. It has a control restrictor in its pilot signal line to slow down the speed at which it resets when the next purge cycle is started. Warning: It is potentially dangerous to energize the Pressurized Motor Enclosure in an unpressurized condition. At the end of the purging cycle. “Alarm Only” Circuit. The cable from the switch is terminated in an “Ex e II T100ºC (Tamb -200C to +550C) IP66” junction box. The system normally will cut off the electrical power to the PE if the enclosure pressure is too low. shut off the electrical supply. Purge Valve: This valve controls the admission of purging air to the PE. Alarm/Pressurized Switch: Like the Motor Interlock Switch this “Ex d II” device is operated by the “Pressurized” signal and provides the facility for a remote electrical system status indicator to show “Pressurized” or “Pressure Failure Alarm”. the system can be altered to provide a hold-on circuit that will maintain the electrical power supply to the PE while also providing a “Pressure Failure Alarm”. It should be adjusted initially to around 50% open. The supply pipe connection to the MiniPurge is 1” NPT(F) but the supply pipe shall be sized for the maximum input purge flow rate for the application and regulated ML434 v12 Issued 31/8/10 © Page 9 of 17 . conduit or glands) shall conform to IEC / European or other relevant local codes. • During purge cycle. “Enclosure Pressure too low” § Green* = “Pressurized” • The “Purging” indicator has two states: § Black* = “Purge flow too low” (or not in the purge mode) § Yellow = “Purge Flow” above the minimum” * Green & Black combination is the indication during normal operation of the PE after the initial purging process has been completed. Cable glands must be “Ex” certified if they are non-metallic.g. the Purge Outlet Valve is closed and the enclosure sealed. humidity and vibration. and any local codes of practice that are in force. a pneumatic cylinder operates a Purge Outlet Valve that lets the air in the enclosure vent out through the RLV. Please consult Expo before installing this equipment in conditions that may cause stresses beyond normal industrial conditions. The MiniPurge system shall be installed in accordance with relevant standards. Increased Safety Ex e II T1000C (Tamb -200C to +550C) IP66: The Terminal Box is “Increased Safety “ (Ex e) certified and incorporates the terminal connection points for the alarm & interlock circuits. • Purge air passes through the RLV and a correctly selected orifice plate will ensure that the Purge Flow Sensor is activated once the selected purge flow has been attained. The main requirement is that IP54 (or better) ingress protection must be provided by the use of seals or washers. This is via a preset pressure differential across an orifice. if the air supply pressure rises up from the specified maximum. After purging has been completed the setting should be adjusted so that the enclosure pressure is within the desired range and the Relief Valve (RLV) / Purge Outlet Valve is closed. Air Supply Quality The MiniPurge system should be connected to a protective gas supply. CLAPS Leakage Compensation Valve (CLAPS LCV): This valve controls the airflow into the PE after the initial purging has been completed. Terminal Box. When the system changes to leakage compensation mode. Visual Indicators: Visual indicators are fitted to provide local status information to the operator: • The “Alarm/Pressurized” indicator has two states: § Red = “Pressure Alarm” i.motor enclosure to maintain a stable running pressure.e. such as IEC / EN 60079-14. • The RLV unit has an in-built relief valve sized to ensure that. Cable entry methods (e. 6. Relief Valve (RLV) / Purge Outlet Valve • The RLV unit allows the purge air to exhaust safely from the enclosure via an in-built Spark Arrestor. sparks and incandescent particles produced by normal operation or an electrical fault within the PE. Installation of the System This equipment is designed for use under normal industrial conditions of ambient temperature. The Spark Arrestor is designed to prevent the emission of arcs. which is suitable for purging and pressurization. the internal enclosure pressure will not exceed the PE specified maximum working pressure. All contacts provided are Volt free (dry). The normal motor running pressure must be determined prior to system start-up so that the CLAPS Sensor may be set to the desired level to control the CLAPS Valve. Multiple Enclosures This purge system is not suitable for multiple enclosures.2. Although equipment will operate with lower air quality. At least 10 seconds for every meter length of supply pipe. with Humidity: -70ºC pressure dewpoint. In particular the exterior of the Spark Arrestor should not be painted or blocked off in any way. It should be installed so that the system indicators and certification labels may be readily observed. flush the supply pipe work with air to remove any debris that may have been introduced into the pipe work during installation. The air supply must be regulated to a pressure less than the maximum stated inlet pressure. Serial Numbers All parts of any system carry a common serial number. or larger. The air supply to the filtration system must be clean. Relief Valve: To achieve efficient purging. therefore it should not be adjusted. If not installed on the PE it should be as close as possible. Where risk of asphyxiation exists refer to “Application Suitability” section. Additional consideration should always be given to local codes of practice. non-flammable.1. It is important that the interior and exterior of the Spark Arrestor is kept clean and debris is not allowed to accumulate which might affect the calibration of the device.to 6 barg.1 or relevant local standards. Prior to connecting the air supply to the purge system. Solid Particles: Humidity: Oil content: 0. The equipment that is being protected may also suffer from poor air quality. When an inert gas is used to supply the purge system. The purge air from the MiniPurge CU should be piped within the PE to ensure purging of potential dead air spots. Location The MiniPurge Control Unit (CU) should be installed either directly on or close to the Motor PE. This is typically referred to as “Instrument Air Quality”. thread size as the CU inlet fitting should be fitted by the installer to prevent any restriction of purge flow. ensure that this commonality is maintained on each installation.5µm < particle size ≤ 1µm. conduit and fittings used to connect the CU to the PE should be metallic or appropriate to the environment into which the system is installed.01mg/m3 concentration total oil * For applications where Tamb ≤ 0ºC. ML434 v12 Issued 31/8/10 © Page 10 of 17 . Unless a supply shut-off valve has been specially fitted to the MiniPurge system. an external shut-off valve with the same. from a nonhazardous area and free from water and oil to BS ISO 8573-1: 2001 Class 2. the points where air enters and exits the PE should normally be at opposite ends of the enclosure.1. No valve may be fitted in any tube connecting the CU to the PE. any piping. If installing more than one system. Piping Unless the MiniPurge is directly connected to the PE. The RLV must be mounted vertically and there should be a minimum clearance of 300mm (12”) around the Spark Arrestor (purge outlet). the air supply should be Class 2. the operational life of the system will be adversely affected. refer to the earlier warnings regarding the safety of the gas used. maximum 1000 particles/m3 -40ºC* pressure dewpoint ≤0. Warning: The correct logic supply pressure is vital to the reliability and calibration of the system. There are volt free (dry) contacts available within the Terminal Box for remote usage. Then. with a 4mm nylon tube.1 barg / 31 psig / 210 kPag. Most Codes include the following recommendations: • ATEX Category 2 (Zone 1) Installations: Alarm and Automatic Trip of Power. • Check the Pressure Relief Valve is correctly set by disconnection the Minimum Pressure sensing “Green” pipe at the bulkhead fitting on the input to the MiniPurge.e. • The “CLAPS Leakage Compensation Valve” can be set finally only when the enclosure has been installed in its permanent operating location. • Check that the pressure gauge on main air supply reads 5 barg / 75 psig / 500 kPa. Commissioning. from where the Minimum Pressure sensing “Green” pipe was removed. oil and condensation. When the PE pressure is above this set point the sensor produces a positive “Pressurized” signal.5 mbar. • Disconnect the supply pipe from the inlet to the MiniPurge system and blow clean air through it for at least 10 seconds per meter of length to remove any debris. The electrical installation must conform to the local codes of practice. This test can be completed several times to ML434 v12 Issued 31/8/10 © Page 11 of 17 . • Close the Purge Flow Restrictor valve and turn on the compressed air to the MiniPurge. The user must make use of this alarm facility in accordance with the local Code of Practice for “Action on Pressure or Flow Failure”. open the Purge Flow restrictor until the pressure Relief Valve opens and check the opening pressure is within calibration. • ATEX Category 3 (Zone 2) Installations Alarm Only on pressure or flow failure with power being removed manually. Purging flow will start. i. For motor applications it is normally via the “Motor Interlock Switch. Proceed as follows: • Check all connections and RLV is fitted correctly with no obstructions to the purge exhaust. this will disable all of the pressure sensors. In all cases the application and the isolation of the power must be controlled by the MiniPurge system using the “Motor Interlock” signal. • Check that the system has been installed in accordance with Expo Instructions. • Open external supply shutoff valve fully.Provision and Installation of Alarm Devices The system has a Minimum Pressure Sensor set to a pressure of least 0. This requirement also applies to any external power sources that are connected to equipment such as “volt-free” (dry) contacts within the PE. The relevant indicator on the CU will change from Red to “Green” When the enclosure pressure falls below the set point of the sensor the “Pressurized” signal is removed. 7.” Exception: Power to other apparatus that is already suitable for the hazardous area need not to be isolated by the MiniPurge system. absence of the signal indicates a “Low Pressure Alarm” condition. • Connect a manometer to the bulkhead fitting. Power Supplies and their Isolation All power entering the PE shall be provided with a means of isolation. where fitted. Commissioning Initial Commissioning. The indicator on the CU will change from Green to “Red”. • Close the Purge Flow Restrictor valve. very slowly. • Check that the internal logic pressure gauge reads 2. No switches are permitted between the Power Switch and the MiniPurge system other than an authorized “Manual Override” circuit. beyond the standard 45 minutes. Gradually close the Purge Flow Restrictor valve until the indicator turns back to Red and take a note of the reading. • Once all tests are completed reset the Purge Flow Restrictor valve and retest the MiniPurge System. The purge time can only be extended. The initial setting of 50% open may be too high or too low. by adding an extra reservoir. • Close the Purge Flow Restrictor valve and then gradually slowly open until above the minimum Pressure Sensor setting. To increase the flow into the motor enclosure. typically 10 mbarg. To complete these tests use a manometer and connect to the MiniPurge Control Unit Test Point (on the top of minimum pressure sensor . Check this reading against the “Test. the Pressurizing and Purging sequence is entirely automatic. The Yellow indication confirms correct Purge Flow Rate. Times in excess of the minimum are permitted and a tolerance of +25% is normally acceptable.• • • • • • • ensure compliance and repeatability. Additional Checks • After proving the system is working correctly it may be a requirement to check the calibration of the Pressure Sensors within the MiniPurge Control Unit. Alarm indicator turns from Red to “Green”. ML434 v12 Issued 31/8/10 © Page 12 of 17 . The setting of the Purge Flow Rate. After this.remove the red plug and use 4mm OD nylon tube) during commissioning. It should always be at or above this setting. • The calibration of the Pressure Sensors is set on a falling pressure. After the purge time has been completed. the Purging Valve will close and the air flow into the enclosure will be controlled by the CLAPS LCV. WARNING: When opening the Purge Flow Restrictor valve ensure the overpressure within the motor does not exceed the pressure Relief Valve setting. The pressure in the Motor should be stabilized as close as possible to this figure. Close the Purge Flow Restrictor and shut-off the external compressed air supply. At this time the "Pressurized" indicator should be “Green” and the "Purging" indicator should be “Yellow”. If the setting is too high this will be demonstrated by continual rising & falling of the motor enclosure pressure. as the CLAPS LCV automatically shuts off and then reinstates the flow. • Go to Maintenance of the System if the Pressure Sensor needs to be recalibrated. See option list of extended times available. Go to Maintenance of the System if the Relief Valve needs to be recalibrated. Normal Operation Turn the air supply valve On or Off to start or stop the system. The purge timer will start as soon as the "Purging" indicator turns “Yellow”. adjust the CLAPS LCV. Turning on the compressed air to the MiniPurge and gradually open the Purge Flow Restrictor valve until the “Black” / Yellow indicator changes to Black / “Yellow”. Check that the time delay between the indicator turning “Yellow” (Purging) and returning to ‘Black’ is not less than the minimum time required to purge the PE. by turning the adjuster screw clockwise. Remove the manometer and replace the Minimum Pressure sensing pipe in the bulkhead fitting. The CLAPS LCV should be adjusted to reduce the flow into the motor enclosure by turning the adjuster screw anti-clockwise. Inspection and Setting Sheet”. typically motor internal pressure should be approximately 13 – 16 mbarg. The setting of the CLAPS Sensor is factory calibrated to the normal working pressure expected in the motor. If the initial setting is too low the CLAPS LCV & CLAPS Sensor will already be working to provide excessive flow into the motor thus leaving no scope for additional compensation during normal motor running. • The same tests can be preformed for the all the other Pressure Sensor incorporated within the MiniPurge Control Unit. adjust Anti-clockwise to reduce the lift off pressure. This may require heating slightly to soften prior to making any adjustment to avoid damaging the soft brass nozzle. Remove any debris or corrosion. "The adjustment is very sensitive and it is recommended that one half turn between tests should be adequate until you are familiar with the device". the following additional checks are recommended: • Apparatus is suitable for the Hazardous Location • There are no unauthorized modifications • The source of air is uncontaminated • The interlocks and alarms function correctly • Approval labels are legible and undamaged • Adequate spares are carried • The action on pressure failure is correct Recalibration of the Pressure Relief Valve (when necessary) Before making any adjustment. Retighten the locking nut while holding the adjustment screw in position before each test. Maintenance of the System The maintenance recommended for the system consists of the following. While holding the central Allen Screw in position loosen the retaining nut. The orifice plate is fitted in its place using two small M3 screws. particles. or replace with a spare. The RLV is supplied with selectable orifice plates to set the flow rate. Brass Nozzle Issued 31/8/10 © Page 13 of 17 .8. Clean or replace it as necessary. Adjust the Allen key clockwise to increase the lift off pressure. • Check the condition of the air supply filter element. Expo recommends that the commissioning tests be repeated at every six to 24 months. make sure the pressure Relief Valve seat is free of contamination.5mm Allen Key. Removing the small cover plate to set the RLV opening pressure Orifice Plate Allen Screw & Lock NUT Recalibration of the Pressure Sensors (when necessary) The brass nozzle is sealed into position using Loctite thread sealant. The adjustment is very sensitive so only turn the nozzle 1 or 2 mm until you have an idea of cause and Remove ML434 v12Sensor by unscrewing anti-clockwise. supplemented by any additional requirements imposed by the local Code of Practice. To adjust the lift off pressure of the overpressure Relief Valve you will require an 8mm spanner and a 2. dependent on the environment. It can be easily changed by removing the large cover plate which includes the outlet valve assembly and screws. In addition the following checks are also recommended at that time: • Check the RLV and any other Spark Arrestors. At least every two years. Check components by substitution only after establishing that such action is necessary. Most reported faults are due to insufficient air supply being maintained throughout the duration of a purge cycle. Some of the more likely faults are dealt with below. However. If the system is less than 12 months old. please call Expo (24 hour answering) or your supplier for further assistance. If a cure cannot be effected by following the procedure shown below. Cause 1: The CLAPS Leakage Compensation Valve setting is too low and the PE is tripping out after purging due to low pressure. Cause 2: Enclosure fault? • Is the ACTUAL PE pressure below the setting of the Minimum Pressure Sensor? Check it with a manometer. with a full report of the fault and the system Serial Number. 9. The filtration must be provided by others. System Purges Correctly but the Alarm Comes ON at the End of Purge Time and the Purging Cycle is Repeated. • Is there any debris on the face of the RLV disk. This can be accomplished by using a rubber block or if necessary a clean finger. Relief Valve Opens (Continuously or Intermittently) ML434 v12 Issued 31/8/10 © Page 14 of 17 . the fault probably lies in the CU. Fault Finding If the system does not behave in the manner described above there is a fault. dirt can enter from other sources and it is vital therefore that the procedures described in the "Installation" section are carried out before using the system for the first time. parts under warranty should be returned to Expo for investigation.affect when calibrating. Before making the following checks verify that both the main air supply pressure to the MiniPurge system & the regulated pressure to the logic are as specified on the system specification sheet. Try increasing the setting of the CLAPS Leakage Compensation Valve to raise the pressure in the PE at the end of purging. or following any disconnection of the pipe-work. The valve should operate and the indicator turns Green. Clockwise reduces the pressure setting. As with any pneumatic system the greatest enemies are water. The system has been designed for ease of fault finding and many of the components fitted are plug-in or chassis mounted. If indicator turns Green it is likely that the pressure sensor diaphragm needs re-calibrating or replacing. Failure to perform this work may cause damage that will not be covered under warranty. perhaps held there because of the magnet? • Has the PE door / covers been closed and all conduit / cable glands sealed? • Is the PE leaking too much? • Is the pressure sensing tube damaged and leaking? Cause 3: System fault? If checks above reveal that the PE is correct. This will protect not only the purge system but also the equipment being purged. For this reason the air system must always incorporate a dust and water filter to provide air to instrument quality. oil and dirt in the air supply. The basic operation of the Minimum Pressure Sensor can be checked by unscrewing the 60mm diameter diaphragm housing and sealing the 12mm threaded hole in the top of the valve module. The pipe bore must be at least the same size of the CU inlet fitting.Cause 1: The PE pressure is too high. The valve should operate and the indicator turns “Yellow”. Check the operation on the new purge time. The basic operation of the Purge Flow Sensor can be checked by unscrewing the 60mm diameter diaphragm housing and sealing the 12mm threaded hole in the top of the valve module.g. Cause 4: The Purge Flow Sensor is not operating correctly or out of calibration. "Purging" Indicator Will Not Turn Yellow During Purging Cause 1: Insufficient Purging Flow due to inadequate air supply pressure. (Call Expo Ltd. Cause 3: The tubing from the RLV Flow Sensing point to the Purge Flow Sensor is not air-tight e. Check for leakage down the cables or conduit. ML434 v12 Issued 31/8/10 © Page 15 of 17 . Finally recheck the purge timer at its full setting. Remove the clamp and retest. Cause 2: Excessive PE leakage. If the system ceases to time out. • The timer setting may be reduced for test purposes by pinching the pipe connected to the reservoir. This can be accomplished by using a rubber block or if necessary a clean finger. When the timer has timed out it should return out when depressed. if in doubt). If this is correct the sensor diaphragm needs re-calibrating or replacing. Remove the RLV cover and clean the valve disk. Has a Leakage Test been done? The total leakage at the Purge Outlet Valve should not exceed 10% of the Purge Flow Sensor setting. Use soapy water to detect the leak and then rectify it. Do not puncture the pipe! The new time will probably be less than 1 minute. System Fails to Operate when the Motor Interlock Switch Closes after the Purge Time has Elapsed? Cause 1: Is power available? Is the power isolator closed? Are the fuses or circuit breaker OK? Cause 2: System fault? Timer not timed out? • Has the "Purging" indicator been “Yellow” for the whole of the purge time? • Is the logic pressure gauge setting correct? • Check the small indicator (if fitted) on the timer valve. there is an air leak in the reservoir circuit. Any significant leakage must be cured. Check and repair as necessary. Cause 2: Debris on the RLV disk allowing air to leak from the valve. Check around the PE when purging is taking place. Adjust the CLAPS LCV. Check the air supply pressure at the inlet to the CU when purging is taking place. Use a small pipe clamp or smooth-jaw pliers. If it works OK. Excessive pressure drop in the supply pipe is a very common cause of this problem. fitting nuts not tightened or tube damaged. The CLAPS Leakage Compensation Valve is too far open. CLAPS Sensor. factory set to 6.10. Recommended Spares List S0015/026 S0191/025 S0191/026 HS1-1XX0-031 S0030/016 S0030/588 Filter kit for S0015/275 filter/regulator E x d IIC T6 limit switch SPNO E x d IIC T6 limit switch DPNO Purge Flow Sensor. ML434 v12 Issued 31/8/10 © Page 16 of 17 . must be factory set to correct value that is stated on Customer System Test & Inspection sheet. must be factory set to correct value that is stated on Customer System Test & Inspection sheet.4 marg Minimum Pressure Sensor. 11.0027X SIRA 01ATEX1295X BASEEFA 04ATEX0218 PTB 00 ATEX 1093 X ML434 v12 Issued 31/8/10 © Page 17 of 17 . Certificates See attached Certificates: Purge system IECEx Certificate Purge system ATEX Certificate Ex e Terminal Box Certificate Ex d electrical switches IECEx SIR07. Drawings and Diagrams The following drawings are attached: Title Drawing Number D758 Control Unit GA D758-GA Typical D758 Hook Up D758-HU D758-3 P and I Diagram D758-PI Circuit Diagram AGM-PA00-021 Terminal Box Layout AGE-WC00-154 Manual Override Switch-HU AGE-WC00-117 RLV .Size 5 MotorPurge RLV XBR-RTD0-009 Sheet(s) 1 of 2 and 2 of 2 1 of 1 1 of 1 1 of 1 1 of 1 1 of 1 1 of 1 12. 92"] 265 [10.P. 2. LO FROM RELIEF VALVE: 1/8" NPT 80 [3.4mm OVER ANY 100mm LENGTH The contents of this drawing / document are Copyright  Expo Technologies Limited. WEIGHT APPROX.79"] 155 [6.2 2 DEC PLACE ±0. FINISH APPROVED: DRAWING STATUS: JOB No: CUSTOMER: SHEET No.24"] 425.P. MINIPURGE MUST BE MOUNTED IN THE ATTITUDE SHOWN.90"] [3. They are to be treated as confidential and are returnable upon request.15"] 4 HOLES Ø9.97"] [0.87"] 80 [3.DIMENSIONS IN mm 3rd ANGLE PROJECTION DO NOT SCALE UNSPECIFIED NO DEC PLACE ±0. No: SYSTEM BREATHER: DO NOT OBSTRUCT 20 M6 x 20 LONG EARTH STUD ON EEx e JUNCTION BOX NOTES: ISSUE: MOTOR ENCLOSURE PRESSURE CONNECTION 1/8" NPT FEMALE MINIPURGE INTERFACE UNIT CERTIFICATION LABELS 274 [10.00 [2.5 TOLERANCES 1 DEC PLACE ±0.72"] VIEW ON ARROW 'B' Expo Technologies Limited TITLE SURREY KT7 0RH UNITED KINGDOM SCALE DRAWING No.1 FLATNESS TO BE LESS THAN 0.79"] B D. neither are they to be used in any way against our interests.94"] MOTOR LOW PRESSURE ALARM / PRESSURIZED INDICATOR (RED / GREEN) 265 [10.71"] 110 [4.54"] 50 [1.43"] MOTOR SYSTEM DATA LABEL FITTED INSIDE COVER (ITEM 28 ON SHEET 2) 57 [2.97"] 73 [2. 5XLC/ss/OV/PA/PC SYSTEM HOUSING AND Ex e JUNCTION BOX: STAINLESS STEEL 316 EXPO PART CODE: D758SYS ALL BULKHEAD FITTINGS: STAINLESS STEEL 304/316 DATE: M6 x 20 LONG EARTH STUD MATERIAL 50 [1. 36.1"] 120 [4.06 [17.5±1.43"] 164 [6.15"] 194 [7.04"] 56.64"] 50 [1.04"] 73 [2. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited.87"] SYSTEM PURGING INDICATOR (BLACK / YELLOW) A 420 [16.33"] 100 PURGE AIR OUTLET 1"NPT FEMALE 480 [18.73"] PURGE AIR SUPPLY 1" NPT FEMALE .76"] EEx e JUNCTION BOX WITH FRONT ACCESS COVER AND REMOVEABLE LOWER GLAND PLATE D.06 [16.5±1.5 FOR WALL MOUNTING 18 [0.22"±0.94"] 455.97"] APERTURE 75 x 180 [2.00 [1. 27Kg MATERIALS: MODEL NO.10"] MOD.46"] FILTER DRAIN 1/8" NPT FEMALE 100 1.24"] VIEW ON ARROW 'A' OPEN PURGE OUTLET SIGNAL TO RELIEF VALVE 1/8"NPT 184 [7.9" x 7. HI FROM RELIEF VALVE: 1/8" NPT 70 [2.44"±0. OF [3. They are to be treated as confidential and are returnable upon request. 30 28 11 12 13 14 15 29 16 17 18 19 20 10 21 9 8 22 7 23 6 24 5 25 4 3 2 26 1 27 32 ISSUE: 33 MATERIAL MOD.4mm OVER ANY 100mm LENGTH DIMENSIONS IN mm 3rd ANGLE PROJECTION DO NOT SCALE The contents of this drawing / document are Copyright  Expo Technologies Limited. OF . They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited.1 FLATNESS TO BE LESS THAN 0. FINISH APPROVED: DRAWING STATUS: JOB No: CUSTOMER: SHEET No. neither are they to be used in any way against our interests.2 2 DEC PLACE ±0.UNSPECIFIED TOLERANCES NO DEC PLACE ±0.5 1 DEC PLACE ±0. No: DATE: Expo Technologies Limited TITLE SURREY KT7 0RH UNITED KINGDOM SCALE DRAWING No. No: DRAWN DATE: APPROVED: JPdB DRAWING STATUS: 2 4667 17/04/09 JPdB MATERIAL Expo Technologies Limited TITLE SURREY KT7 0RH UNITED KINGDOM See drawing AGM-PA00-021 SCALE DRAWING No.5 1 DEC PLACE ±0.4mm OVER ANY 100mm LENGTH The contents of this drawing / document are Copyright  Expo Technologies Limited.1 FLATNESS TO BE LESS THAN 0. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited. 1 ISSUE: MOD.2 2 DEC PLACE ±0. They are to be treated as confidential and are returnable upon request. FINISH JOB No: CUSTOMER: SHEET No. neither are they to be used in any way against our interests. 1 OF 1 .DIMENSIONS IN mm 3rd ANGLE PROJECTION DO NOT SCALE UNSPECIFIED TOLERANCES NO DEC PLACE ±0. RELIEF VALVE UNIT MOTOR COOLER PURGE OUTLET VALVE open signal Air outlet Ensure outlet is not obstructed Measuring point for flow of purge air MOTOR Air inlet MINIPURGE LC BOOST NOTE Measuring point for minimum pressure SYSTEM PURGING contacts ALARM / PRESSURIZED contacts INTERMEDIATE PRESSURE contacts MOTOR INTERLOCK contacts PURGE AIR DISTRIBUTION AS REQUIRED LC Boost system is optional. MINIMUM 1" NPT 1/8" NPT 1/8" NPT RELIEF VALVE ASSEMBLY * 1" [25mm] I.UNSPECIFIED TOLERANCES NO DEC PLACE ±0. neither are they to be used in any way against our interests. 1 OF 1 . No: 1 DRAWN DATE: APPROVED: DRAWING STATUS: JPdB 6 7 4669 4686 21/04/09 01/07/09 JPdB JPdB 8 4763 11/8/09 JPdB MATERIAL Expo Technologies Limited TITLE SURREY KT7 0RH UNITED KINGDOM SCALE DRAWING No.D.HI FROM RELIEF VALVE 1/4" [6mm] I. They are to be treated as confidential and are returnable upon request.P.4mm OVER ANY 100mm LENGTH DIMENSIONS IN mm 3rd ANGLE PROJECTION DO NOT SCALE The contents of this drawing / document are Copyright  Expo Technologies Limited. FINISH JOB No: CUSTOMER: SHEET No. 1/8" NPT D.D. SYSTEM PURGING (OPTIONAL) MINIPURGE SYSTEM ENCLOSURE ALARM / PRESSURIZED LOW PRESSURE PAL ALARM PURGING/ PURGE COMPLETE INTERMEDIATE PRESSURE MOTOR INTERLOCK XI MINIPURGE CONTROL LOGIC XC 1/8" NPT D. 1/8" NPT OPEN PURGE OUTLET VALVE CONTROL SIGNAL 1/4" [6mm] I.1 FLATNESS TO BE LESS THAN 0.D.P.5 1 DEC PLACE ±0.230 psi ) INSTRUMENT AIR/INERT GAS 1" [25mm] I. LO FROM RELIEF VALVE 1/4" [6mm] I. MINIMUM 1" NPT H A B AUTOMATIC LEAKAGE COMPENSATION VALVE PURGE BOOST UNIT (OPTIONAL) PI 1/2" NPT MANUALLY SET PURGE BOOST FLOW CONTROL VALVE H * 1/2" NPT RECOMMENDED MINIMUM SIZE FOR PURGE AIR DISTRIBUTION PIPEWORK CONNECT TO EITHER A OR B ELECTRICAL SIGNAL VIA EEx e JUNCTION BOX OPTIONAL ISSUE: MOD.2 2 DEC PLACE ±0.D.D. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited. 1/8" NPT TEST POINT NORMALLY PLUGGED MOTOR ENCLOSURE 1/8" NPT MANUALLY SET PURGE FLOW CONTROL VALVE H PI SUPPLY 5-16 barg (73 . They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited. OF .UNSPECIFIED TOLERANCES NO DEC PLACE ±0.2 2 DEC PLACE ±0. No: DATE: Expo Technologies Limited TITLE SURREY KT7 0RH UNITED KINGDOM 27 SCALE DRAWING No.1 FLATNESS TO BE LESS THAN 0. FINISH APPROVED: DRAWING STATUS: JOB No: CUSTOMER: SHEET No.4mm OVER ANY 100mm LENGTH DIMENSIONS IN mm 3rd ANGLE PROJECTION DO NOT SCALE 20 The contents of this drawing / document are Copyright  Expo Technologies Limited.5 1 DEC PLACE ±0. 7 21 8 5 2 23 22 19 28 29 6 26 18 4 9 1 17 15 24 12 25 10 14 13 16 ISSUE: 3 MATERIAL MOD. neither are they to be used in any way against our interests. They are to be treated as confidential and are returnable upon request. 4mm OVER ANY 100mm LENGTH DIMENSIONS IN mm DO NOT SCALE The contents of this drawing / document are Copyright  Expo Technologies Limited. IECEx ULD 05. FINISH APPROVED: DRAWING STATUS: JOB No: CUSTOMER: SHEET No.3rd ANGLE PROJECTION UNSPECIFIED TOLERANCES NO DEC PLACE ±0.1 FLATNESS TO BE LESS THAN 0.0008U.2 2 DEC PLACE ±0. UP TO 20. They are to be treated as confidential and are returnable upon request. No: DATE: Expo Technologies Limited TITLE SURREY KT7 0RH UNITED KINGDOM SCALE DRAWING No. OF .5 1 DEC PLACE ±0. neither are they to be used in any way against our interests. 3 DOUBLE LINES SHOW THE POSITION OF TERMINAL END PLATES 4 MAXIMUM VOLTAGE: 550V 5 MAXIMUM CURRENT RATING: 10A / TERMINAL AT 55°C MATERIAL MOD. INCLUDING EARTH TERMINALS. SEE CIRCUIT DIAGRAM 101 102 103 104 105 107 108 109 BROWN BLACK GREY 106 BLUE MOTOR INTERLOCK CONTACTS BROWN GREY BLACK INTERMEDIATE PRESSURE CONTACTS BROWN GREY BLACK ALARM/ PRESSURISED CONTACTS TERMINAL LAYOUT 110 SEE CIRCUIT DIAGRAM 101 102 103 104 105 106 107 108 109 110 111 112 BROWN GREY BLACK BROWN SYSTEM PURGING CONTACTS BLACK BLUE GREY MOTOR INTERLOCK CONTACTS BROWN GREY BLACK INTERMEDIATE PRESSURE CONTACTS BROWN GREY BLACK ALARM/ PRESSURISED CONTACTS 113 TERMINAL LAYOUT FOR SYSTEM FITTED WITH "SYSTEM PURGING" CONTACTS NOTES ISSUE: 1 EXTRA TERMINALS MAY BE FITTED IF REQUESTED BY CUSTOMER TO BRING THE TOTAL NUMBER OF TERMINALS. 2 ALL TERMINALS MUST BE Ex e CERTIFIED KEMA 98 ATEX1683U. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited. CABLE GLANDS ARE NOT SUPPLIED. GLAND PLATE IN PURGE SYSTEM IS UNDRILLED. They are to be treated as confidential and are returnable upon request. * TERMINAL NUMBER ACCORDING TO MOTOR SYSTEM ISSUE: MOD.1 FLATNESS TO BE LESS THAN 0.UNSPECIFIED TOLERANCES NO DEC PLACE ±0.5 1 DEC PLACE ±0. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited. Ex e TERMINAL BOX FROM MINIPURGE NEUTRAL GREY LIVE BLUE NEUTRAL BLACK LIVE BROWN 7 (or 107)* 8 (or 108)* 9 (or 109)* 10 (or 110)* MANUAL OVERRIDE 14 Ex d IIC T6 24 23 13 MANUAL OVERRIDE SWITCH SUPPLIED LOOSE.2 2 DEC PLACE ±0.4mm OVER ANY 100mm LENGTH DIMENSIONS IN mm 3rd ANGLE PROJECTION DO NOT SCALE The contents of this drawing / document are Copyright  Expo Technologies Limited. neither are they to be used in any way against our interests. 1 OF 1 . No: 1 6 7 8 MATERIAL DRAWN DATE: APPROVED: DRAWING STATUS: PO CERT RELATED Expo Technologies Limited TITLE SURREY KT7 0RH UNITED KINGDOM SCALE DRAWING No. FINISH JOB No: CUSTOMER: SHEET No. 8 = 274 = 9. neither are they to be used in any way against our interests. 1 OF 1 . 95 136 NOTES 4.1 FLATNESS TO BE LESS THAN 0. ON INSTALLATION ENSURE THAT FIXING BOLTS ARE EVENLY TIGHTENED TO A TORQUE OF 5 Nm (44 lbf/in) 202 274 MOUNTING DETAILS REV.0 = 306 = DIFFERENTIAL FLOW SIGNAL HIGH PRESSURE PURGE AIR OUTLET PURGE AIR OUTLET SPARK ARRESTOR MUST NOT BE OBSTRUCTED 10. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited. PART CODE: ARV-1048-107 5. MOD NUMBER APPROVED DATE APPROVED 01 DRAWN 20/02/2009 JPdB 02 4666 17/04/2009 JPdB 03 4793 16/10/2009 JPdB DRAWN DATE: 11/02/2009 MATERIAL DRAWING STATUS: production APP'D CHK'D DR'WN JPdB NRB NAH Expo Technologies Limited UNITED KINGDOM SURREY KT7 0RH STAINLESS STEEL 316L 1. RELIEF VALVE SUPPLIED WITH USER SELECTABLE ORIFICE PLATES TO SET THE FLOW RATE.5 1 DEC PLACE ±0.7 = 120 = 3. XBR-RTD0-009 SHEET No.6mm THK TITLE FINISH NROB JOB No: SIZE 5 MOTORPURGE RLV CUSTOMER: 10 FIXING POINTS TO SUIT M8 SCALE 1:5 REV: 03 DRAWING No.4mm OVER ANY 100mm LENGTH UNSPECIFIED TOLERANCES MOTOR ENCLOSURE OVER PRESSURE RELIEF VALVE ASSEMBLY 10-OFF FIXING POINTS TO SUIT M8 INSPECTION COVER OPEN PURGE OUTLET VALVE SIGNAL 30 60 DIFFERENTIAL FLOW SIGNAL LOW PRESSURE 120 CRS 256 CRS EXCHANGEABLE ORIFICE PLATE 280 The contents of this drawing / document are Copyright © Expo Technologies Limited.4 = 240 = 4. They are to be treated as confidential and are returnable upon request. 43 240 CRS 306 CRS LARGE COVER PLATE FOR CHANGING THE ORIFICE PLATE MOTOR ENCLOSURE TEST POINT (PLUGGED) 88 330 12. WEIGHT IS APPROXIMATELY 7 kg 8.1 = 256 = 1.2 2 DEC PLACE ±0. 10.9 = 225 = 2.DIMENSIONS IN mm 3rd ANGLE PROJECTION DO NOT SCALE NO DEC PLACE ±0. THE RELIEF VALVE MUST BE MOUNTED IN THE ORIENTATION SHOWN. . . . . . . . 5 earth terminals certified to KEMA98ATEX1683. M50031) Application Suitability: MiniPurge Interface Units are certified for use in Hazardous Areas where the Hazardous Area is non-mining (i. Installation: The MiniPurge Interface Unit shall be installed in accordance with relevant standards. The lid shall be correctly fitted. Contact Terminals For Type 1827 maximum x20 WDU2. Maintenance The condition of enclosure and associated cable glands shall be inspected for damage periodically. Page 1 of 1 Issue 1 11/06/04 . please consult Expo Technologies for further guidance.5 or WPE2. The systems may be used in Zone 1 and Zone 2 Hazardous Areas. The following materials are used in the construction of MiniPurge Interface Units. Surrey. Only install commission. such as EN 60 079-14.) MiniPurge Interface Unit may be used for hazards of any gas group. External faults such as broken switches within the Control Unit may also require investigation. UK EEx e II T100ºC IP64 0518 Type: Certificate Number: Rating : Serial Number: II 2 G D Tamb -20ºC to +55ºC MIU B/e P1827 or MIU B/e P1813 Baseefa04ATEX0218 550V 10A YYYY/XZZZZZ YYYY = year of manufacture (i.5 earth terminals certified to KEMA98ATEX1683. The MiniPurge Interface Unit shall be connected to the MiniPurge Purge and Pressurization system in accordance with the instructions given in the handbook supplied with the pressurization system. This equipment is designed for use under normal industrial conditions of ambient temperature.e. Copper. terminals for tightness and gaskets for damage. Commissioning (Putting into use) The installation of the cable glands. Cable glands or other cable entry devices shall be appropriately certified and suitable for the cable and the conditions of use and be installed in accordance with the manufacturer’s instructions. above ground) and the hazard is caused by flammable gasses or vapours. Drawings and Diagrams Refer to the manual supplied with the Control Unit for assembly and connection drawings. The external earth connection of the MiniPurge Interface unit shall be connected to earth using a minimum 4mm2 conductor. If substances that will adversely affect any of these materials are present in the surrounding environment. 2004) XZZZZZ = serial number (i. Brass.5 or WPE2. Steel. check each terminated wire. Thames Ditton. humidity and vibration. and any local codes of practice that are in force.e. electrical and earth connections shall be inspected for correct installation before the unit is put into service. (ATEX Category 2 and 3 respectively. PVC. Fault Finding If a wiring or signal fault occurs. Please consult Expo Technologies before installing this equipment in conditions that may cause stresses beyond normal industrial conditions Materials of construction: Stainless Steel. inspect. For Type 1813 maximum x10 WDU2.e. The terminals inspected for tightness and gaskets inspected for damage. EN 60 079-14 contains guidance on the selection of appropriate cable glands. Polyamide. maintain or fault find when safe to do so.MiniPurge Interface Unit ATEX Certification User Instruction Manual Certification Data: Manufacturer: Hazardous Area Marking Code: Expo Technologies Ltd. . . . as described.Declaration of Conformity With European Directives Expo Technologies Ltd Summer Road Thames Ditton KT7 0RH UK This document confirms that “MiniPurge” Pressurize and Purge Control Systems manufactured by Expo Technologies Ltd conform. In normal operation these circuits are “benign” and no CE mark is appropriate. to the following European Directives and standards:Electromagnetic Compatibility Directive MiniPurge systems with a /PO suffix in the type number are non-electrical and are outside the scope of the EMC Directive. European Type Certification certified by SIRA 01 ATEX 1295X in conformance with: EN 60079-0 : 2006 EN 60079-2 : 2004 EN 61241-0 : 2006 EN 61241-4 : 2006 Pressure Equipment Directive 97/23/EC Signed Managing Director S:\Files\QA\CERTS\C-OF-C\Minipurge CE SC004 Issue3. “ATEX 100A” Directive MiniPurge systems are designed to conform to the ATEX Directive. Low Voltage Directive MiniPurge systems are intended to be used in Hazardous Areas (Explosive Atmospheres) and are therefore excluded from the Low Voltage Directive.doc Date 12/10/2007 Confidential Assessment file reference SC004 . MiniPurge systems with the suffices /PA or /IS incorporate one or more volt-free (“dry”) contacts which work in circuits specified by others. . expoworldwide. England. Ohio 44022-0486. USA Tel: Fax: E-mail: (440) 247 5314 (440) 247 5409 sales.na@expoworldwide. Chagrin Falls.. Summer Road.com www.com Expo Technologies Inc.. Thames Ditton.com . Surrey. KT7 0RH Tel Fax E-mail: + 44 (0) 20 8398 8011 + 44 (0) 20 8398 8014 [email protected] Technologies Ltd. PO Box 486.