Quincy Compressor QSI Series Instruction Manual page 92

Section VII - Compressor Fluids
Lubrication
Most Quincy compressors are equipped with a positive
displacement fluid pump mounted to the compressor and
directly driven by one of the rotors. Fluid is circulated
through the cooler, fluid filter, and into the compressor.
In the compressor, fluid is diverted through internal pas-
sages to ensure positive lubrication of the bearings and
shaft seal. The remainder of the fluid is injected at the be-
ginning stage of the compression cycle to seal clearances
and to cool and lubricate the rotors. Models not equipped
with a fluid pump use pressure differential to circulate the
fluid. Positive pressure maintained in the reservoir forces
the fluid throughout the machine.
Each Quincy compressor is filled at the factory with the
correct amount of one of the synthetic fluid listed in the
Fluid Specifications. Mineral oil can be requested and
used in specific applications. The use of other brands or
types of fluid may reduce the design life of the com-
pressor or cause problems with filtration or carryover.
Consult the Quincy Service Department before changing
brands of fluid.
Fluid Level
Fluid level is monitored by a sightglass or a dial gauge
while in operation. Fluid level should be in the "run"
area on the dial gauge or completely fill the sight gauge.
DO NOT OVER FILL.
90
Figure 1-1. Fluid Level Sight Gauges
Each unit comes equipped with a fluid level sight gauge,
fluid fill opening, and a fluid drain in the reservoir. The
fill plug is drilled to allow some pressure to escape before
the plug is completely removed. Should you hear pres-
surized air venting through the hole, immediately screw
the plug back into the reservoir. Relieve the pressure in
the machine before proceeding.
Hot fluid under pressure could cause death or
serious injury. Do not remove the fluid fill plug
and attempt to add fluid to the reservoir while the
compressor is in operation or when the system is
under pressure. Be sure that the compressor's red
mushroom stop button is pushed in and locked
and that the main power disconnect switch is in
the off position and locked out to assure that the
compressor will not start automatically.
Quincy Compressor-QSI
®
CAUTION!