EXPO MiniPurge D825/ET, Руководство пользователя, Страница: 3 / 40

ML550 | v6 i
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
Minimum Pressure Sensor .......................................................................................................8
Purge Flow Sensor ...................................................................................................................8
Intermediate Sensor .................................................................................................................8
Electronic Purge Timer .............................................................................................................8
Purge Complete Valve..............................................................................................................8
OR Gate ...................................................................................................................................9
Alarm Only Circuit (/AO) ...........................................................................................................9
Power Interlock Output .............................................................................................................9
Alarm / Pressurized Output ......................................................................................................9
Intermediate Pressure Output ..................................................................................................9
Purge Valve ..............................................................................................................................9
CLAPS Sensor .........................................................................................................................9
CLAPS Regulator .....................................................................................................................9
Visual Indicators .....................................................................................................................10
Relief Valve Unit .....................................................................................................................10
Explosionproof Terminal Box..................................................................................................10
Section 6: Installation of the System.......................................................................................11
Relief Valve Unit .....................................................................................................................11
Air Supply Quality ...................................................................................................................11
Pipe Work ...............................................................................................................................12
Multiple Enclosures ................................................................................................................12
Provision and Installation of Alarm Devices ...........................................................................12
Power Supplies and their Isolation .........................................................................................12
Power Interlock Switch ...........................................................................................................12
Section 7: Commissioning .......................................................................................................14
Commissioning the System ....................................................................................................14
Normal Operation ...................................................................................................................15
Section 8: Maintenance of the System....................................................................................16
General maintenance .............................................................................................................16
Maintenance of Electronic Timer ............................................................................................16
Re-calibration of the Relief Valve Unit....................................................................................16
Re-calibration of the Pressure Sensors..................................................................................17
Section 9: Fault Finding............................................................................................................18
General Information................................................................................................................18
System purges correctly but trips and auto re-purges at the end of the purge time...............18
Relief Valve opens (continuously or intermittently).................................................................19
System enters purging but purge indication does not occur...................................................19
Section 10: Recommended Spares List ..................................................................................20
Section 11: Glossary.................................................................................................................20
Section 12: Drawings and Diagrams .......................................................................................20
Section 13: FM ML384 Manual .................................................................................................21
Appendix A: Certifications ......................................................................................................28