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®
D825/ET MiniPurge
Manual
ML550 & ML384
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.
ML550 | v6 & ML384 | v3
09-Jan-20
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Table of Contents
Related Manuals for EXPO MiniPurge D825/ET
Summary of Contents for EXPO MiniPurge D825/ET
- Page 1 Manual ML550 & ML384 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.
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Page 3: Table Of Contents
Section 1: System Specification ....................1 ® MiniPurge Control Unit Data....................2 Relief Valve Unit and Purge Outlet Valve with integral spark arrestor........3 Section 2: Quick User Guide ......................4 Installation ..........................4 Operation of the System ......................4 Section 3: Application Suitability ....................6 Section 4: Description and Principle of Operation ..............7 Section 5: Main Components .....................8 Air Supply Filter / Regulator......................8 Logic Air Supply Regulator .......................8... -
Page 4: Section 1: System Specification
Appendix A of this manual. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com... -
Page 5: Minipurge ® Control Unit Data
Purge Time: User selectable, in 1 minute intervals, up to 99 minutes (tolerance -0, +3 seconds). ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com... -
Page 6: Relief Valve Unit And Purge Outlet Valve With Integral Spark Arrestor
Rectangular cut-out and fixing holes as per drawing. Weight: 7 kg (15.4 lb) ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com... -
Page 7: Section 2: Quick User Guide
Purging Sequential flashing Purge flow rate above minimum Yellow ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com E:sales.na@expoworldwide.com... - Page 8 If an obvious problem has not been highlighted and corrected, follow the procedures in the Fault Finding section. If all checks have been carried out and the system still does not perform as expected, contact your local distributor or Expo Technologies. ML550 | v6...
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Page 9: Section 3: Application Suitability
® The following materials are used in the construction of MiniPurge systems. If substances that will adversely affect any of these materials are present in the surrounding environment, please consult Expo Technologies for further guidance. Materials of Construction Stainless Steel... -
Page 10: Section 4: Description And Principle Of Operation
This system has been specifically designed to maintain a stable internal pressure within the enclosure. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 11: Section 5: Main Components
If both conditions are satisfied a signal is sent to indicate that the purge is complete. This performs two functions: to turn on the electrical supply to the pressurized enclosure and to ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 12: Or Gate
It either increases or decreases the air flow into the enclosure as appropriate to maintain a stable running pressure.The CLAPS Regulator must be set at the time of commissioning. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 13: Visual Indicators
Cable entries are 1/2 in. NPT(F). Unused openings shall be blanked with suitable certified flameproof/explosionproof plugs. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 14: Section 6: Installation Of The System
® The MiniPurge 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.The MiniPurge system must be installed by a competent person in accordance with relevant standards, such as IEC / EN 60079-14, NEC500 and any local codes of practice. -
Page 15: Pipe Work
Prior to commissioning, check that the terminal box is clean, the connections have been made properly, the cables laid correctly and all screws in the terminals are secure. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... - Page 16 Power to apparatus that is already suitable for use in hazardous locations need not be isolated by the MiniPurge system. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com...
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Page 17: Section 7: Commissioning
• The flashing yellow indicator confirms the correct flow rate. • The differential pressure should be greater than 6.4 mbarg ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com... -
Page 18: Normal Operation
For normal operation of the system, after commissioning has been carried out it is possible to turn the air supply valve on or off to start or stop the system. After this, the purge and pressurization sequence is automatic. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 19: Section 8: Maintenance Of The System
To adjust the lift off pressure of the Relief Valve: • Attach test equipment as described in the Commissioning Section. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com... -
Page 20: Re-Calibration Of The Pressure Sensors
• Turn clockwise to reduce the pressure setting and anti-clockwise to increase. • Replace sensor, screwing clockwise. • Reconnect all pipe work. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com... -
Page 21: Section 9: 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 system is less than 12 months old, parts under warranty should be returned to Expo for investigation. -
Page 22: Relief Valve Opens (Continuously Or Intermittently)
Flow sensor setting incorrect • Check the pressure is correct on the flow sensor. ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com... -
Page 23: Section 10: Recommended Spares List
XBR-RTD0-009 XBR-7TD0-040 ® MiniPurge X LC Sequence Diagram ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com E:sales.na@expoworldwide.com... -
Page 24: Section 13: Fm Ml384 Manual
SA body) Compensation Valve” (LCV) which is adjusted so that the flow is enough to compensate for any leakage from the PE. ¤ ¤ Expo Technologies Limited Page 1 of 7 ML384 Issue 03 – 09.01.13... - Page 25 In addition, for "Y" and "Z" Pressurization systems, a suitable indicator shall fitted in any tube connecting the Expo system to the PE. be provided. 1.1.4 The user or manufacturer of the PE shall determine the volume of the PE, the necessary purging volume, and 1.2.3 The tubing and fittings used must conform to...
- Page 26 Pressure Sensor settings, are used (please ask Expo if in doubt). flow rates and purge time. Note: No valves may be fitted between the Expo system 1.5.2 Other marking, for the PE, required by the and the alarm switch.
- Page 27 LCV slowly observing the manometer or gauge (see as follows: item 2.1.3 above). The PE pressure will start to fall as the 2.3.1 Open the supply shutoff valve. ¤ ¤ Expo Technologies Limited Page 4 of 7 ML384 Issue 03 – 09.01.13...
- Page 28 PE as 2.3.10 “Y” and “Z” purge systems do not control the shown on the PE or Expo system nameplate. enclosure power. It is the responsibility of the user to Never turn on the power without purging first unless...
- Page 29 Is there debris stuck on the face of the Relief Valve dealt with below. If a cure cannot be effected by following disk, perhaps held there because of the magnetic the procedure shown below please call Expo (24 hour material? answering) or your supplier for further assistance.
- Page 30 Purge Flow Sensor needs re-calibrating it can either be point to the Purge Flow Sensor is not air-tight e.g. fitting returned to Expo for this service or it can be done by nuts not tightened or tube damaged. Check and repair as the user as follows: necessary.
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Page 31: Appendix A: Certifications
FTRX.E181300 actuators, where the UL label has to be removed during assembly ML550 | v6 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011 T: +1 (440) 247 5314 T: +86 532 8906 9858 E: sales@expoworldwide.com... - Page 35 MOTOR INTERLOCK LIVE PNEUMATIC SIGNAL NEUTRAL (2 barg / 30 psi / 200Kpa) LIVE NEUTRAL INTERMEDIATE PRESSURE PNEUMATIC SIGNAL (2 barg / 30 psi / 200Kpa) COMMON ALARM/PRESSURIZED PNEUMATIC SIGNAL PRESSURIZED (2 barg / 30 psi / 200Kpa) ALARM COMMON...
- Page 39 [This Page Intentionally Left Blank] ...
- Page 40 Expo Technologies USA Expo Technologies UK Expo Technologies China Expo Technologies Inc. Expo Technologies Ltd. Qingdao Expo M&E Technologies Co. Ltd 9140 Ravenna Road Unit #3 Unit 2 The Summit, Hanworth Road 329 Huashan Er Lu Sunbury-On-Thames, Jimo City, Qingdao,...
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