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®
D760-ET MiniPurge
Manual
ML 548
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.
ML548 | v11
20-April-2022
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Summary of Contents for EXPO MiniPurge D760-ET
- Page 1 Manual ML 548 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 2: 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 ....................5 Section 4: Description and Principle of Operation .............. - Page 3 Section 11: Glossary ........................19 Section 12: Drawings and Diagrams ..................19 Section 13: Certifications ......................20 ML548 | v10...
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Page 4: Section 1: System Specification
The RTDs are to be treated as 'simple apparatus' intrinsically safe components - see EXPO 20MDOC1403X as attached. Users may decide to connect RTD monitoring circuits as 2-, 3- or 4-wire circuits as preferred. The temperature monitoring circuits themselves are provided by others. -
Page 5: Minipurge ® Control Unit Data
Minimum: 20 mbarg. Maximum: 35 mbarg. Default Setting: 30 mbarg. Tolerance: -0, +10%. ML548 | v11 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). ML548 | v11 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
Yellow On completion of an uninterrupted purge cycle of the required length, the system will indicate purge complete. ML548 | v11 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 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 9: Section 4: Description And Principle Of Operation
This system has been specifically designed to maintain a stable internal pressure within the enclosure. ML548 | v11 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 10: Section 5: Main Components
This sensor monitors the pressure inside the pressurized enclosure. It senses when the pressure is drops and provides early warning before the low pressure sensor trips the system. ML548 | v11 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 11: High Pressure Sensor
Warning: It is potentially dangerous to energise the pressurized enclosure in an non-pressurized condition when it is known that there is potentially explosive gas or dust in the hazardous location. ML548 | v11 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 12: Visual Indicators
This valve restricts the purge flow to the minimum required flow rate. The Purge Flow Regulator must be readjusted during commissioning. ML548 | v11 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 13: Claps Sensor
IP66 (or better) ingress protection must be provided by use of seals or washers. Thermostat and Heater ® This Expo MiniPurge system is equipped with an Ex d certified heater for temperature maintenance when am- bient temperatures drop below -10°C. The heater is thermostatically controlled via an external Ex d certified ®... -
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, and any local codes of practice. -
Page 15: Pipe Work
It is the responsibility of the user to ensure that the switch is only operated within appropriate technical limits. ML548 | v11 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... -
Page 16: Section 7: Commissioning
Indicator turns green. This activates the Purge Flow Regulator. • Slowly open the Purge Flow Regulator until the Pressure Relief Valve opens. This is the set point. ML548 | v11 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011... - Page 17 To increase the flow into the pressurized enclosure, adjust the CLAPS Regulator Relief Valve unit by turning the adjuster screw clockwise. ML548 | v11 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011...
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Page 18: Normal Operation
• After the timing phase has elapsed, the battery may be hot-swapped in the hazardous location without ® affecting the operation of the MiniPurge system ML548 | v11 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 19: 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. ML548 | v11 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: 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 21: Relief Valve Opens (Continuously Or Intermittently)
The intrinsically safe battery pack • Replace as necessary. is discharged ML548 | v11 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 22: Section 10: Recommended Spares List
LOW TEMP MOTORPURGE CIRCUIT AGM-PA00-062 LOW TEMP MOTORPURGE TERMINAL LAYOUT AGE-WC00-248 ML548 | v11 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 Thermostat ATEX Certificate LCIE 99 ATEX 6017 X * IECEx Certificate IECEx LCI 07.0003X * RTD Sensors Manufacturers Declaration EXPO 20MDOC1403X * *Certificates attached to manual. ML548 | v11 Page Expo Technologies UK Expo Technologies US Expo Technologies China T: +44 (0) 20 8398 8011...
- Page 30 Ex e TERMINAL BOX...
- Page 52 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 617 Shillin Er Road Twinsburg, Sunbury-On-Thames,...
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