EXPO MiniPurge D808/ET Manual Download Page 1

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ML501_ET | v18

17-Jan-20

D808/ET MiniPurge

Manual

ML501_ET

Important Note:
It is essential for safety that the installer and user of the Expo system follow these
instructions.

Please refer to the standard for principles and definition.
These instructions apply only to the pressurizing system. it is the responsibility of the

manufacturer of the pressurized enclosure to provide instructions for the enclosure.

Expo Technologies reserves the right to replace any component, with one of the equivalent functionality.

Summary of Contents for MiniPurge D808/ET

Page 1: ...these instructions Please refer to the standard for principles and definition These instructions apply only to the pressurizing system it is the responsibility of the manufacturer of the pressurized e...

Page 2: ......

Page 3: ...on of the System 10 Relief Valve Unit 10 Air Supply Quality 10 Pipe Work 11 Multiple Enclosures 11 Provision and Installation of Alarm Devices 11 Power Supplies and their Isolation 11 Power Interlock...

Page 4: ...Db Tamb 20 C to 55 C IECEx SIR07 0027X Ex pxb ia IIC T5 Gb Ex pxb ia IIIC T100 C Db Tamb 20 C to 55 C PA Power and Alarm Switches Integral PA Terminal Box OV Purge Outlet Valve is pneumatically opera...

Page 5: ...female Minimum supply line 50 mm 2 I D Pipe Reference points signals 1 8 NPT female Visual Indicators Alarm Red Pressurized Green System Purging 4 LEDs that flash sequentially to indicate elapsed tim...

Page 6: ...ermediate and CLAPS sensor calibration point For example Minimum pressure 5 mbarg intermediate pressure 6 5 mbarg CLAPS sensor 9 mbarg Purge Time User selectable in 1 minute intervals up to 99 minutes...

Page 7: ...in air supply pressure during the purge process Operation of the System Once the system is installed correctly turn on the air supply Refer to Commissioning section The purge system commences the purg...

Page 8: ...be used in IECEx and ATEX Zone 1 21 and or Zone 2 22 Categories 2 and 3 respectively MiniPurge systems may be used for hazards of any gas group Apparatus associated with the MiniPurge system such as i...

Page 9: ...he enclosure before pressurization Purging is the process of removal contaminated air and replacement with air or inert gas known to be free from flammable gas The duration of this purge process is no...

Page 10: ...is is the regulator that controls the leakage compensation air flow into the enclosure after the purging is complete It either increases or decreases the air flow into the enclosure as appropriate to...

Page 11: ...ioning section Alarm Only Circuit AO If the pressure in the pressurized enclosure is too low the system will normally cut off electrical power to it In certain circumstances where local codes of pract...

Page 12: ...d enclosure Purge air passes through the Relief Valve Unit the preset pressure differential across the appropriate orifice ensures that the purge flow sensor is activated once the selected purge flow...

Page 13: ...s might affect the calibration of the device In particular the exterior of the spark arrestor should not be painted or blocked in any way Air Supply Quality The MiniPurge system should be connected to...

Page 14: ...its associated terminal boxes Provision and Installation of Alarm Devices When the pressure inside the pressurized enclosure is above the minimum the Minimum Pressure Sensor returns a positive pressu...

Page 15: ...ior to commissioning check that the Ex e terminal box is clean the connections have been made properly the cables laid correctly and all screws in the terminals are secure In all cases the application...

Page 16: ...CLAPS regulator clockwise till the Low Pressure Alarm Indicator turns green This activates the Purge Flow Regulator Slowly open the Purge Flow Regulator until the Pressure Relief Valve opens This is...

Page 17: ...ssure Sensor check readings on manometer as system will automatically re purge when it reaches minimum pressure 19 While the system re purges return the CLAPS Regulator to the initial setting 20 If th...

Page 18: ...table for use in the hazardous location There are no unauthorised modifications The air supply is uncontaminated The interlocks and alarms function correctly Approval labels are legible and undamaged...

Page 19: ...check the correct setting of the relief valve after adjustment The adjustment is sensitive and it is recommended that a 1 4 turn maximum adjustments are applied between tests Re calibration of the Pr...

Page 20: ...designed for ease of fault finding and many of the components fitted are plug in or chassis mounted Check components by substitution only after establishing that such action is necessary Before carry...

Page 21: ...in the supply pipe Static pressure of 5 barg must be maintained during purge Check air supply pressure at the inlet to the control unit Ensure that the supply pipe bore is suitable for the flow rate P...

Page 22: ...e factory set to the value as stated on the Customer Test and Inspection Sheet S0015 018 Pressure gauge Air Supply Pressure 0 10 barg S0015 135 Miniature gauge Logic Pressure 0 4 barg ETM IS31 001 IS...

Page 23: ...om downloads or refer to ML497 Component Certificate Number Purge System ATEX Certificate SIRA 01ATEX1295X IECEx Certificate IECEx SIR07 0027X INMETRO T V Certificate T V 12 1462X MIU e Ex e Terminal...

Page 24: ...t i m i L s e i g o l o n h c e T o p x E n o i t c u d o r p B D 5 6 1 W T Y E R R U S M O D G N I K D E T I N U E L G N A d r 3 N O I T C E J O R P S U T A T S G N I W A R D E T A D N W A R D m m N...

Page 25: ...U S S E R P W O L E T A I D E M R E T N I 8 N E E R G D E R R O T A C I D N I P I R T M R A L A E R U S S E R P W O L 9 N E E R G D E R R O T A C I D N I M R A L A E R U S S E R P W O L E T A I D E M...

Page 26: ...7 6 6 5 7 2 6 6 1 8 S E T O N E B T S U M E V L A V F E I L E R E H T N W O H S E D U T I T T A E H T N I D E T N U O M b l 1 5 g k 3 2 X O R P P A S I T H G I E W 0 0 1 8 0 0 2 V R A S I E D O C T R...

Page 27: ...HG DV FRQILGHQWLDO DQG DUH UHWXUQDEOH XSRQ UHTXHVW 7KH DUH QRW WR EH FRSLHG RU FRPPXQLFDWHG LQ SDUW RU LQ ZKROH ZLWKRXW ZULWWHQ FRQVHQW IURP SR 7HFKQRORJLHV LPLWHG QHLWKHU DUH WKH WR EH XVHG LQ DQ ZD...

Page 28: ...EET No OF SURREY TW16 5DB UNITED KINGDOM DRAWING No SCALE The contents of this drawing document are Copyright Expo Technologies Limited They are to be treated as confidential and are returnable upon r...

Page 29: ...ORMALLY PLUGGED FLATNESS TO BE LESS THAN 0 4mm OVER ANY 100mm LENGTH UNSPECIFIED TOLERANCES MATERIAL DR WN APP D CHK D DRAWING STATUS APPROVED MOD No DATE ISSUE 3rd ANGLE PROJECTION DIMENSIONS IN mm D...

Page 30: ...OWN BLACK ALARM PRESSURIZED MOTOR ENCLOSURE PRESSURE BULKHEAD PURGE OUTLET OPEN SIGNAL 2 PURGE INDICATOR YELLOW PURGING ELECTRONIC TIMER TIMER SWITCH PURGE COMPLETE VALVE OR GATE TIMER VALVE INTERMEDI...

Page 31: ...UH WKHUHIRUH H FOXGHG IURP WKH RZ 9ROWDJH LUHFWLYH 3UHVVXUH TXLSPHQW LUHFWLYH 8 0LQL3XUJH 6 VWHPV DUH FODVVLILHG DV QRW KLJKHU WKDQ FDWHJRU XQGHU UWLFOH RI WKLV LUHFWLYH DQG LQWHQGHG IRU XVH LQ SRWHQW...

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Page 36: ...Technologies UK Expo Technologies Ltd Unit 2 The Summit Hanworth Road Sunbury On Thames TW16 5DB UK T 44 20 8398 8011 F 44 20 8398 8014 E sales expoworldwide com Expo Technologies China Qingdao Expo...

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