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pressure remains at zero psig. If it does not,
continue reclaiming until the pressure remains
at zero psig.
4. Remove the oil fill plug and slowly add oil to the
compressor sump through the oil fill opening
until the proper oil level is obtained. (See
Figure 4-11.) The correct oil level should be
between the "Min" and "Max" marks
compressor crankcase adjacent to the sight
glass(es).
5. Replace the oil fill plug.
6. Evacuate the compressor to 1000 microns, if
the oil sump has been opened to atmosphere
7. Backseat
(counterclockwise)
service valve.
8. Restart the system and recheck oil level.
(Refer to section 4.18.2.)
b. Oil Pump Method
1. Connect an oil pump to a one U.S. gallon
(3.785 liters) refrigeration oil container. Using
the Robinair compressor oil pump (Carrier
Transicold P/N 14388) is recommended.
NOTE
When the compressor is in operation, the
pump check valve prevents the loss of
refrigerant, while allowing servicemen to
develop sufficient pressure to overcome
the operating suction pressure to add oil as
necessary.
2. Backseat suction service valve and connect oil
charging hose to port. Crack the service valve
and purge the oil hose at oil pump. Add oil as
necessary.
c.Closed System Method
In an emergency where an oil pump is not
available, oil may be drawn into the compressor
through the suction service valve.
CAUTION
Extreme care must be taken to ensure the
manifold common connection remains
immersed in oil at all times. Otherwise air
and moisture will be drawn into the
compressor.
1. Connect manifold gauge set. Place center
charging line into compressor oil container as
shown in Figure 4-12 Slowly open discharge
hand valve to purge line, then close.
T-288
2. Frontseat the suction service valve and place a
jumper wire on the low pressure switch to
by-pass the switch.
3. Start unit and pull crankcase pressure until
suction pressure gauge indicates 5 inches/hg.
Shut down unit.
4. Crack open manifold valve and allow vacuum
on
in compressor to draw oil slowly into
compressor. When level is just above one
quarter glass, close
manifold valve. Midseat the suction service
valve. Remove the LPS jumper wire.
5. Start unit and check compressor oil level.
6. Backseat valve to remove hose from suction
discharge
service valve and replace service valve caps.
Suction
Service
Valve
Figure 4-12. Compressor Oil Charge Connections
4.18.4 Adding Oil to Service Replacement Com-
pressor
The appropriate compressor oil must be
used according to the refrigerant used in the
system. (Refer to section 1.2.b.)
Service replacement compressors may or may not
be shipped with oil.
If the replacement compressor is shipped without
oil, add oil through the oil fill plug port. (Refer to
section 1.2.b.)
4.18.5 Removing Oil from the Compressor
a. If the oil level recorded in step 4.18.2 is
above"Max" line on the the sight glass, remove
oil from the compressor.
b. Connect manifold gauges to the compressor.
c. Frontseat (clockwise) suction service valve
and pump unit down to zero psig. Frontseat
(clockwise) discharge service valve and slowly
4-14
Gauge
Manifold
Compressor
Container
CAUTION
Oil
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