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ML511 | v13

28-June-2022

D818-ET MiniPurge

Manual

ML 511

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.

Содержание MiniPurge D818-ET

Страница 1: ...hese 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 en...

Страница 2: ...x 10 Section 6 Installation 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 Isol...

Страница 3: ...mb 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 T V 12 1462X Ex pxb ia IIC T5 Gb Ex pxb ia IIIC T100 C Db Tamb 20 C to 55 C PC Pressurized Control Auto...

Страница 4: ...e 1 2 NPT female Minimum supply line 13 mm 1 2 ID tube inlet sized appropriately for flow rate Reference points signals 1 8 NPT female minimum 6 mm pipe to be used Visual Indicators Alarm Red Pressuri...

Страница 5: ...al settings are available on request see Test and Inspection Sheet Default Setting 99 minutes Weight 16 kg 35lb Type ARV 0528 107 Bore Purge Outlet Valve 52 mm Relief Valve 52 mm Relief Valve Lift Off...

Страница 6: ...e system is installed correctly turn on the air supply Refer to Commissioning section The purge system commences the purge cycle The purge air will enter the enclosure The pressurized enclosure will o...

Страница 7: ...be used in IECEx and ATEX Zone 1 and or Zone 2 Categories 2 and 3 respectively MiniPurge systems may be used for hazards of any gas group Apparatus associated with the MiniPurge system such as intrin...

Страница 8: ...e 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 nor...

Страница 9: ...ified by means of the integral pressure gauge Minimum Pressure Sensor This monitors the pressure inside the pressurized enclosure When the pressure is below the minimum required for safe operation the...

Страница 10: ...ure and to reduce the high purge flow rate to leakage compensation mode It also provides a hold on signal that maintains the leakage compensation mode with the power switch on even when the purge time...

Страница 11: ...Purge Valve This changeover valve selects between purge air flow or leakage compensation It is sized to allow sufficient air into the enclosure during purging based on the specified air supply pressur...

Страница 12: ...requirement is that IP66 or better ingress protection must be provided by use of seals or washers Section 5 Installation of the System The MiniPurge is designed for use under normal industrial conditi...

Страница 13: ...y air to remove any debris that may remain in the pipes This must be carried out for at least 10 seconds for every meter of supply pipe Unless a supply shut off valve has been fitted to the MiniPurge...

Страница 14: ...box It is the responsibility of the user to ensure that the switch is only operated within appropriate technical limits The switch must be replaced after any short circuit that occurs within the main...

Страница 15: ...and above the CLAPS pressure At this time the pressurized indicator should be green gradually open Purge Flow Restrictor Valve until purging indicator flashes yellow Note For large volumes it may tak...

Страница 16: ...ster screw anti clockwise 23 If the initial setting is too low the CLAPS Regulator may not provide enough air flow causing a gradual decline in enclosure pressure To increase the flow into the pressur...

Страница 17: ...ation There are no unauthorised modifications The air supply is uncontaminated The interlocks and alarms function correctly Approval labels are legible and undamaged Adequate spares are carried The ac...

Страница 18: ...all pipe work Fault Finding General Information If you are having problems that cannot be corrected using one of the methods described please call Expo or your supplier for further assistance If the...

Страница 19: ...pressure sensor setting The pressure can be checked using a manometer The most common causes of this problem are outlined below Fault Location Cause Solution Pressurized Enclosure There is debris on...

Страница 20: ...s suitable for the flow rate Pressurized Enclosure Excessive leakage from the pressurized enclosure Check around the enclosure while purging is taking place Total leakage at purge outlet valve should...

Страница 21: ...0 168 Electronic Timer Assembly c w potted Timer Switch Acronym Definition A T Alarm and Trip AO Alarm Only CLAPS Closed Loop Automatic Pressurization System CU Control Unit ET Electronic Timer FCV Fl...

Страница 22: ...ation of Conformity SC004 UKCA Declaration of Conformity SC004 UK ATEX Certificate SIRA 01ATEX1295X IECEx Certificate IECEx SIR07 0027X UKCA Certificate CSAE 21UKEX1067X INMETRO T V Certificate T V 12...

Страница 23: ...this drawing document are Copyright Expo Technologies Limited They are to be treated as confidential and are returnable upon request They are not to be copied or communicated in part or in whole with...

Страница 24: ...LY SYSTEM PURGING SWITCH 250V 4A SPNO Ex d II OPTIONAL 27 22 24 25 26 23 21 20 19 17 GAUGE MAIN AIR SUPPLY GAUGE LOGIC AIR SUPPLY LOGIC AIR SUPPLY REGULATOR CLAPS SENSOR MOTOR INTERLOCK SWITCH 250V 4A...

Страница 25: ...to be treated as confidential and are returnable upon request They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited neither are they to b...

Страница 26: ...LO FROM RELIEF VALVE 1 4 6mm I D 1 8 NPT SYSTEM PURGING OPTIONAL INTERMEDIATE PRESSURE ALARM 1 8 NPT PRIMARY ENCLOSURE PRESSURE 1 4 6mm I D FLATNESS TO BE LESS THAN 0 4mm OVER ANY 100mm LENGTH UNSPECI...

Страница 27: ...USTOMER SHEET 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 returna...

Страница 28: ...Copyright Expo Technologies Limited They are to be treated as confidential and are returnable upon request They are not to be copied or communicated in part or in whole without written consent from E...

Страница 29: ...IF IN DOUBT ASK FINISH MATERIAL A3 SCALE DRAWING STATUS A TOLERANCES UNLESS OTHERWISE STATED FLATNESS TO BE LESS THAN 0 4 OVER ANY 100mm LENGTH ANGLE STD 1 MOD REVISION DRAWN CHECKED APPROVED DATE DR...

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Страница 39: ...a Ta 65 C to C Ex e IIC T4 Gb Ta 65 C to C Ex ia IIC T4 Ga Ta 65 C to C Ex ib IIC T6 Gb Ta 65 C to C Ex ta III C T85 C Da Ta 65 C to C Ex ib IIC T5 Gb Ta 65 C to C Ex ta III C T100 C Da Ta 65 C to C E...

Страница 40: ...d any acceptable variations to it specified in the schedule of this certificate and the identified documents was found to comply with the following standards IEC 60079 0 2011 Edition 6 0 Explosive atm...

Страница 41: ...as follows SPECIFIC CONDITIONS OF USE YES as shown below 7KH 3 XQFWLRQ R HV FRPSULVH D SRO HVWHU 3 QFORVXUH FRPSRQHQW FHUWLILHG DV 6 5 8 WKDW LV ILWWHG ZLWK WHUPLQDOV 5HIHU WR FHUWLILFDWH QQH H IR D...

Страница 42: ...sue 2021 09 30 Page 4 of 4 Issue No 6 DETAILS OF CERTIFICATE CHANGES for issues 1 and above Annex IECEx SIR 06 0087X Issue 6 Annexe pdf 1 This issue Issue 6 recognises the following change refer to th...

Страница 43: ...smaller enclosure EPL Ga Gb Db BPG ref Maximum Power Dissipation W T6 T85 C Ta 40 C max T6 T85 C Ta 55 C max T6 T85 C Ta 60 C max T6 T85 C Ta 65 C max T5 T100 C Ta 55 C max T4 T100 C Ta 90 C max 1 8...

Страница 44: ...y vary if cross connection facilities are used The reduction in rating of adjacent terminals shall be observed where applicable The terminals fitted into the junction boxes shall also conform to the f...

Страница 45: ...ons and IEC 60079 11 2012 Edition 6 was included in the list of supporting standards 3 The Condition of Certification related to static was removed in addition the Conditions of Manufacture were ratio...

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Страница 48: ...chnologies 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 M E...

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