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®
D770/ET MiniPurge
Manual
ML 564
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.
ML564 | v3
26-June-18
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Summary of Contents for EXPO MiniPurge D770/ET
- Page 1 Manual ML 564 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 Vortex Cooling Assembly ......................3 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 .....................9 Air Supply Filter / Regulator......................9... - Page 4 Section 10: Recommended Spares List ..................22 Section 11: Glossary.........................22 Section 12: Drawings and Diagrams ..................22 Section 13: Certifications ......................23 ML564 | v3...
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Page 5: Section 1: System Specification
For limitations and conditions of use refer to the applicable certificates. ML564 | v3 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: Minipurge ® Control Unit Data
Set at 6.4 mbarg (Tolerance: -0, +10%). CLAPS Sensor: Minimum: 5.0 mbarg. ML564 | v3 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: Vortex Cooling Assembly
Rectangular cut-out and fixing holes as per drawing. Weight: 7 kg (15.4 lb). ML564 | v3 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 8: Section 2: Quick User Guide
Yellow On completion of an uninterrupted purge cycle of the required length, the system will indicate purge complete. ML564 | v3 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 9 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. ML564 | v3...
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Page 10: 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 11: Section 4: Description And Principle Of Operation
This system has been specifically designed to maintain a stable internal pressure within the enclosure. ML564 | v3 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... - Page 12 Normal Operation Fault Condition - loss of pressure outside of CLAPS regulation ML564 | v3 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 13: Section 5: Main Components
This valve receives a signal from the purge timer that indicates the completion of the purge cycle and verifies that the pressurization signal is still present. If both conditions are satisfied a signal is sent to indicate that the purge ML564 | v3 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 14: Or Gate
The cable from the switch is terminated in the /PA terminal box. ML564 | v3 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 15: Intermediate Switch
The pneumatic vortex cooling assembly is an automatic cooling system that allows the purge control unit to be used in areas with an ambient temperature of up to +60°C. The Vortex Cooling Assembly comprises of the Pneu- ML564 | v3 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 16: Vortex Cooler Activation Thermostat
ML564 | v3 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 17: 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, and any local codes of practice. -
Page 18: Pipe Work
Technical modifications to the switch are not permitted. ML564 | v3 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... - Page 19 Power to apparatus that is already suitable for use in hazardous locations need not be isolated by the MiniPurge system. ML564 | v3 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 20: Section 7: Commissioning
• Gradually open the Purge Flow Restrictor Valve until the black / yellow indicator changes to yellow (flashing). ML564 | v3 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: 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. ML564 | v3 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 22: 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. ML564 | v3 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: 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. ML564 | v3 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 24: 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 25: Relief Valve Opens (Continuously Or Intermittently)
The intrinsically safe battery pack • Replace as necessary . is discharged ML564 | v3 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 26 XBR-RTD0-009 ® X LC Sequence Diagram XBR-7TD0-040 MiniPurge ML564 | v3 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 27 IECEx EPS 14.0092X Ex d limit switch EPS 14 ATEX 1766 X ML564 | v3 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 37 If substances that will adversely affect any of these materials are present in the surrounding environment, please consult Expo Technologies for further guidance. This equipment is designed for use under normal industrial conditions of ambient temperature, humidity and vibration. Please consult Expo Technologies before installing this equipment in conditions that may cause stresses beyond normal industrial conditions.
- Page 38 II 2(3) GD MiniPurge systems are manufactured under Production Quality Assurance Notification SIRA 99 ATEX M043, issued by SIRA Certification Service, Notified Body No 0518. Signed for and on behalf of Expo Technologies Ltd., John Paul de Beer hn Paul de...
- Page 39 [This Page Intentionally Left Blank] ...
- Page 40 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 Twinsburg Sunbury on Thames Jimo City, Qingdao, Shandong Province OH 44087, USA TW16 5DB, UK...
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