EXPO MiniPurge D808/ET, Manual

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ML501_ET | v18 i
Section 1: System Specification ........................................................................................................ 1
D808 MiniPurge
®
Control Unit Data ................................................................................................. 2
D808 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 .......................................................................... 6
Section 5: Main Components ............................................................................................................. 7
Air Supply Filter ................................................................................................................................ 7
Logic Air Supply Regulator ............................................................................................................... 7
Purge Flow Regulator ....................................................................................................................... 7
CLAPS Regulator ............................................................................................................................. 7
Low Pressure Sensor ....................................................................................................................... 7
Purge Flow Sensor ........................................................................................................................... 8
CLAPS Sensor ................................................................................................................................. 8
Electronic Purge Timer ..................................................................................................................... 8
Alarm Only Circuit (/AO) ................................................................................................................... 8
Power Interlock Switch ..................................................................................................................... 8
Alarm / Pressurized Switch .............................................................................................................. 8
System Purging Switch (Optional) .................................................................................................... 9
Intermediate Switch .......................................................................................................................... 9
Visual Indicators ............................................................................................................................... 9
Relief Valve Unit ............................................................................................................................... 9
/PA Terminal Box ............................................................................................................................. 9
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 Isolation ................................................................................................. 11
Power Interlock Switch ................................................................................................................... 11
Section 7: Commissioning ............................................................................................................... 13
Commissioning the System ............................................................................................................ 13
Normal Operation ........................................................................................................................... 14
Section 8: Maintenance of the System ........................................................................................... 15
General maintenance ..................................................................................................................... 15
Additional maintenance checks ...................................................................................................... 15
Maintenance of Electronic Timer .................................................................................................... 15
Re-calibration of the Relief Valve Unit ............................................................................................ 15
Re-calibration of the Pressure Sensors .......................................................................................... 16
Section 9: Fault Finding ................................................................................................................... 17
General Information ........................................................................................................................ 17
System purges correctly but trips and auto re-purges at the end of the purge time. ...................... 17
Relief Valve opens (continuously or intermittently) ........................................................................ 18
System enters purging but purge indication does not occur .......................................................... 18
System begins purging but cycles fail to complete ......................................................................... 18
Section 10: Recommended Spares List .......................................................................................... 19
Section 11: Glossary ........................................................................................................................ 19
Section 12: Drawings and Diagrams ............................................................................................... 19
Section 13: Certificates .................................................................................................................... 20