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D779 MiniPurge
Manual
ML 433
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. D779 MiniPurge
: General System Specification
1
15
Page
of
ML433 V2
Issued 26/11/07 ©
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Summary of Contents for EXPO MiniPurge D779
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Page 1: Table Of Contents
Manual ML 433 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.) - Page 2 1. D779 MiniPurge : General System Specification Pressurized Motor Housing Pressurized Motor Enclosure : A range of Electrical Motor housings Classification : Zone 1 Group IIC Volume(Litre) : Various, system settings determined by motor manufacturer. Total Purge Flow Rate : To be supplied by customer and must include flow to compensate for leakage.
- Page 3 Purge Time : User selectable. 3-off time increments available. 10, 15 or 20 Minutes (-0 + 25%). Giving a maximum available purge time period of 45 minutes. Default set to 45 Minutes. Approvals :ATEX Certificate: Sira 01ATEX1295X 0518 II 2 (2) G D Ex [px] II T6 Ex pD II 21 T85ºC Tamb -20ºC +55ºC...
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Page 4: Quick User Guide
If an obvious problem has not been highlighted and corrected then follow the checks in the section “Fault Finding”. If the checks have been made and the system will still not work then please contact your local distributor or EXPO. Page ML433 V2... -
Page 5: Application Suitability
“Pressurization” is a method of protection used in Zone 1 and Zone 2 Hazardous Locations to ensure that the interior of an electrical enclosure, for example the motor housing, is free of flammable gas. With the utilization of the Expo MiniPurge system, the motor may be used safely in a hazardous environment. -
Page 6: Main Components
(A&T – Alarm and Trip). This can be changed by the customer to “Alarm Only” (AO), please refer to Section titled ‘Main Components’ - “Alarm Only” circuit. 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. - Page 7 functions: turn on the electrical supply to the PE, turn off the high purge flow and start the “Leakage Compensation” mode. 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.
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Page 8: Installation Of The System
Cable glands must be “Ex” certified if they are non-metallic. 6. Installation of the System This equipment is designed for use under normal industrial conditions of ambient temperature, humidity and vibration. Please consult Expo before installing this equipment in conditions that may cause stresses beyond normal industrial conditions. ... - Page 9 ≤0.01mg/m3 concentration total oil Oil content: * For applications where Tamb ≤ 0ºC, the air supply should be Class 2.1.1, with Humidity: -70ºC pressure dewpoint. The air supply must be regulated to a pressure less than the maximum stated inlet pressure. When an inert gas is used to supply the purge system, refer to the earlier warnings regarding the safety of the gas used.
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Page 10: Commissioning
• The “CLAPS Leakage Compensation Valve” can be set finally only when the enclosure has been installed in its permanent operating location. • Check that the system has been installed in accordance with Expo Instructions. • 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, oil and condensation. - Page 11 Black / “Yellow”, typically motor internal pressure should be approximately 13 – 16 mbarg. Yellow indication confirms correct Purge Flow Rate. • At this time the "Pressurized" indicator should be “Green” and the "Purging" indicator should be “Yellow”. • WARNING: When opening the Purge Flow Restrictor valve ensure the overpressure within the motor does not exceed the pressure Relief Valve setting.
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Page 12: Maintenance Of The System
The maintenance recommended for the system consists of the following, supplemented by any additional local requirements imposed by the local Code of Practice. Expo recommends that the commissioning tests be repeated at every six to 24 months, dependent on the environment. In addition the following checks are also recommended at that time: •... - Page 13 As with any pneumatic system the greatest enemies are water, oil and dirt in the air supply. For this reason the air system must always incorporate a dust and water filter to provide air to instrument quality. This will protect not only the purge system but also the equipment being purged. The filtration must be provided by others.
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Page 14: Recommended Spares List
Remove the clamp and retest. If the system ceases to time out there is an air leak in the reservoir circuit. Use soapy water to detect the leak and then rectify it. (Call Expo Ltd. if in doubt). Finally recheck the purge timer at its full setting. -
Page 15: Certificates
12. Certificates See attached Certificates: Purge system IECEx Certificate IECEx SIR07.0027X Purge system ATEX Certificate Sira 01ATEX1295X Ex e Terminal Box Certificate Sira 99ATEX3173 Ex d electrical switches PTB 00 ATEX 1093 X Page ML433 V2 Issued 26/11/07 ©... - Page 16 DIMENSIONS IN mm 3rd ANGLE TOLERANCES 1 DEC PLACE ±0.2 upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither DO NOT SCALE PROJECTION 2 DEC PLACE ±0.1 are they to be used in any way against our interests.
- Page 17 DIMENSIONS IN mm 3rd ANGLE TOLERANCES 1 DEC PLACE ±0.2 upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither DO NOT SCALE PROJECTION 2 DEC PLACE ±0.1 are they to be used in any way against our interests.
- Page 18 Expo Technologies Limited. They are to be treated as confidential and are returnable 3rd ANGLE TOLERANCES 1 DEC PLACE ±0.2 upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither DO NOT SCALE PROJECTION 2 DEC PLACE ±0.1 are they to be used in any way against our interests.
- Page 19 DIMENSIONS IN mm 3rd ANGLE TOLERANCES 1 DEC PLACE ±0.2 upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither DO NOT SCALE PROJECTION 2 DEC PLACE ±0.1 are they to be used in any way against our interests.
- Page 20 Expo Technologies Limited. They are to be treated as confidential and are returnable 3rd ANGLE TOLERANCES 1 DEC PLACE ±0.2 upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither DO NOT SCALE PROJECTION 2 DEC PLACE ±0.1 are they to be used in any way against our interests.
- Page 21 Expo Technologies Limited. They are to be treated as confidential and are returnable 3rd ANGLE TOLERANCES 1 DEC PLACE ±0.2 upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither DO NOT SCALE PROJECTION 2 DEC PLACE ±0.1 are they to be used in any way against our interests.
- Page 23 UNSPECIFIED NO DEC PLACE ±0.5 The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential 3rd ANGLE DIMENSIONS IN mm TOLERANCES 1 DEC PLACE ±0.2 and are returnable upon request. They are not to be copied or communicated in part or in whole without written consent PROJECTION 2 DEC PLACE ±0.1...
- Page 35 This document confirms that “MiniPurge” Pressurize and Purge Control Systems manufactured by Expo Technologies Ltd conform, as described, 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.
- Page 36 Expo Technologies Ltd., + 44 (0) 20 8398 8011 Summer Road, + 44 (0) 20 8398 8014 Thames Ditton, E-mail: sales@expoworldwide.com Surrey, England, KT7 0RH Expo Technologies Inc., Tel: (440) 247 5314 PO Box 486, Fax: (440) 247 5409 Chagrin Falls, E-mail: sales.na@expoworldwide.com...
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