Quincy Compressor 50093-103 - Manual (Page 45)

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Fluid Level
The vacuum pump is filled at the factory with the correct
amount of QUINSYN
® fluid. The fluid level is monitored
by a fluid level indicator located on the side of the air/fluid
reservoir tank while in operation. Fluid level should
completely fill the sight gauge while the vacuum pump is
in operation. Should the fluid level drop, and air is seen in
the sight glass, add fluid. DO NOT OVER FILL as the
excess fluid will carry over into the discharge piping
system.
Vacuum Pump Rotation
Vacuum pump rotation must be checked prior to start-up.
Proper rotation on the QSVI 25, 50, 75, 100 and 200 is
clockwise as viewed from facing the drive shaft. The QSVI
40 rotation is counter-clockwise as viewed from facing the
drive shaft. The power-input end of the vacuum pump is
marked with an arrow noting the proper rotation. Failure
to operate the vacuum pump in correct rotation will result
in extreme damage to the vacuum pump and warranty
coverage will be voided.
Phase Monitor
QSVI vacuum pumps may be equipped with an optional
phase monitor device to protect against low voltage, loss
of phase to any power leg and an imbalance of incoming
power between any two legs.
The phase monitor contains a relay. The relay contacts
close when all voltages and the phase sequence are
correct. Low voltage and voltage unbalance must be
sensed for a continuous trip delay before the relay is de-
energized. The trip delay is a fixed 10 seconds. The
voltage unbalance trip point is a fixed 6% and the low
voltage trip point is a fixed minus 10%. If the relay is de-
energized, it will automatically re-energize upon correction
of the fault condition.
If the phase monitor relay will not energize at star-up, make
the following checks:
(1) Check all electrical connections to the phase monitor.
(2) Check, and change if required, the phase rotation of
the incoming power.
Check the leg to leg voltage of the incoming power for low
voltage condition or voltage imbalance. (This may require
power company assistance to correct.)
NOTE:
When service is required on the motor, contactor or
overloads it is critical that wire reconnections are
correct. Starting the vacuum pump with reverse rotation
will cause damage and void warranty.