Quincy Compressor QSI Series Instruction Manual page 83

Important Maintenance Requirements
•
The following procedure should be followed for
maximum safety when preparing for maintenance or
service:
1) Disconnect and lockout 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) Open the manual vent valve and wait for the pres-
sure 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 depressurize system if water-
cooled.
Section V - Preparing for Maintenance or Service
Never assume the compressor is ready for main-
tenance or service because it is stopped. The au-
tomatic dual control may start the compressor at
any time. Death or serious injury could result.
Quincy Compressor-QSI
®
WARNING!
81