Preparing For Maintenance Or Services - Quincy Compressor QMA Series Instruction Manual

SECTION V- PREPARING FOR
MAINTENANCE OR SERWCE
*Preparing for Maintenance or Service
NEVER ASSUME THE COMPRESSOR
IS READY FOR MAINTENANCE OR
SERVICE BECAUSE IT IS STOPPED.
THE AUTOMATIC STOP-START
CONTROL MAY START THE
COMPRESSOR AT ANY TIME.
~wA~~G!
PreRarin~ for Maintenance or Service
The following procedure should be used for maximum
safety when preparing for maintenance or service.
1. Disconnect and lock-out the main power switch and
hang a sign at the switch of the unit being serviced.
2. Close shut-off valve (block valve) between receiver
and plant air system, to prevent any back-up of air
flow into the area to be serviced. NEVER depend
upon a check valve to isolate the system.
3. Lock open the manual vent valve and wait for the
pressure in the system to be completely relieved
before starting service. DO NOT close the manual
vent valve at any time while servicing.
4. Shut off water and repressurize the system if the
compressor is water-cooled.
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