Thermo King CRR-40 119, Руководство пользователя

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Refrigeration Maintenance and Service Operations
128
2. After stopping the compressor, adjust the low
side pressure to 21 kPa, 0.21 bar, 3 psig using
the service gauge set. (Pressure measured at
the suction line service port.)
3. Remove the cap from oil pressure fitting on
oil pump.
4. Using a commercial hand pump, force oil in
through the oil pressure fitting. Slowly add oil
and allow 5 to 10 minutes for the oil to flow
down through the compressor into the sump.
Add Polyol Ester oil, P/N 203-433 ONLY!
5. When the compressor oil sight glass is 1/2 to
3/4 full, remove hand pump and replace the
cap on the oil pressure fitting.
6. Open the compressor suction service valve (or
liquid line service valve) and operate the unit.
Recheck the refrigerant charge level and the
oil level before returning the unit to service.
Removing Excess Compressor Oil
1. Install an access valve actuator on the oil
pressure fitting.
2. Operate the unit and remove oil while
watching the level in the compressor sight
glass.
NOTE: Heavy foaming of the oil as it leaves
the compressor may indicate an excess of
refrigerant in the oil. Remove the access
valve actuator and operate the system for 15
minutes to ensure warm sump. Then recheck
the oil level.
3. When the compressor oil sight glass is 1/2 to
3/4 full, remove access valve and replace the
cap on the oil pressure fitting.
4. Operate the unit and recheck the refrigerant
charge level and the oil level before returning
the unit to service.
Refrigerant Leak Test Procedure
Use a reliable Halogen leak detector such as
model H10G, P/N 204-712 or 204-756 (portable),
to leak test the refrigeration system. Inspect
carefully for signs of compressor oil leakage
which is the first sign of a leak in the refrigeration
system.
NOTE: Due to environmental concerns and
personal safety, the use of a Halide torch is no
longer recommended.
If refrigerant has leaked or been removed from the
unit:
1. Check entire system for possible component
damage and refrigerant oil loss.
2. Attach gauge manifold set (refer to “Gauge
Manifold Set Attachment and Purging” for
proper procedures).
3. Attach refrigerant bottle charging hose to
center of gauge manifold and purge charging
hose of air.
4. Pressurize the system with refrigerant (GAS
ONLY) until 345 kPa, 3.45 bar, 50 psig vapor
pressure is achieved.
5. Leak check the system with an electronic leak
detector to inspect all joints and connections.
(Use soap solution as an alternative test
component.)
If no leaks are found but the system has lost its
refrigerant charge, proceed to the next step.
6. Close both hand valves on gauge manifold
(front seated).
7. Disconnect the refrigerant charging hose.
Figure 40: Testing for Refrigerant Leaks
8. Connect the charging hose to a source of
nitrogen. Adjust the pressure regulator to 1380
kPa, 13.80 bar, 200 psig. See “Using
Pressurized Nitrogen” in this manual chapter.
AJA1305