Quincy Compressor 50093-103 - Manual (Page 49)

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Section 5 – Maintenance or Service
Preparation
Preparing for Maintenance or Service
! WARNING !
Never assume the vacuum pump is ready for
maintenance or service because it is stopped.
The automatic control could start the vacuum
pump at any time. Death or serious injury may
result.
The following procedure should be used for maximum
safety when preparing for maintenance or service:
•
Per OSHA regulation 1910.147: The control of
Hazardous Energy Source (Lockout/Tagout),
disconnect and lockout the main power switch and tag
the switch of the unit being serviced.
•
Close shut-off valve ahead of the inlet valve and after
the air/fluid reservoir (if so equipped) to prevent any air
flow through or pressure build up in the vacuum pump.
Never depend on a check valve to isolate the system.
•
Manually vent the vacuum system to atmospheric
pressure.
•
Shut off water and pressurization system (if water-
cooled).