vel of the oil in the front sig
the compressor operating. The correct level should
be between bottom and 1/4 of the sight glass. If the
level is above 1/4, oil must be removed from the
follow step d. If the level is below si
to the compressor following step b.
and closed system method.
This oil pump adapts to a one U.S. gallon (3.785
liters) metal refrigeration oil container and pumps 2-1/2
remove pump from can after each use.
allowing servicemen to develop sufficient pressure to
overcome the operating suction pressure to add oil as
the oil hose at oil pump. Add oil as necessary.
Extreme care must be taken to ensure
remains immersed in oil at all times.
drawn into the compressor.
manifold to the compressor suction service valve port,
manifold in an open container of refrigeration oil. Crack
the suction service valve and gauge valve to vent a
With the unit running, frontseat the suction service
valve and pull a vacuum in the compressor crankcase.
compressor. Add oil as necessary.
Adding oil to service repl
Service replacement compressors may or may not
removing the oil fill plug (See Figure 4-8)
ove oil from the compress
discharge service valve and slowly bleed remaining
d run unit to check oil level,
repeat as required to ensure proper oil level.
compressor cylinder head) is controlled by relay UFR
and the temperature controller.
with the setpoint temperature at least 5
above set point and the compressor will be fully
varipower equation and forced compressor to be in
Verify that suction pressure rise of approximately 3
The coil may be removed without pumping the unit
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