113 PB
R-410A REFRIGERANT SYSTEM REPAIR
Compressor Replacement
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
Failure to follow these procedures could
result in moderate or serious injury.
WARNING
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to follow these procedures could
result in minor to moderate injury.
CAUTION
WARNING
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Failure to follow proper safety procedures
could result in serious injury or death.
1. Be certain to perform all necessary electrical and refrigeration tests to be
sure the compressor is actually defective before replacing.
2. Recover all refrigerant from the system though the process tubes. PROPER
HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS
IS REQUIRED. Do not use gauge manifold for this purpose if there has been a
burnout. You will contaminate your manifold and hoses. Use a Schrader valve
adapter and copper tubing for burnout failures.
3. After all refrigerant has been recovered, disconnect suction and discharge
lines from the compressor and remove compressor. Be certain to have both
suction and discharge process tubes open to atmosphere.
4. Carefully pour a small amount of oil from the suction stub of the defective
compressor into a clean container.
5. Using an acid test kit (one shot or conventional kit), test the oil for acid
content according to the instructions with the kit.
6. If any evidence of a burnout is found, no matter how slight, the system will
need to be cleaned up following proper procedures.
7. Install the replacement compressor.
8. Pressurize with a combination of R-410A and nitrogen and leak test all
connections. If a leak cannot be found, pressurize with a combination of
Nitrogen and a trace charge of R-410A and sweep with with an electronic or
Halide leak detector. Recover refrigerant and repair any leaks found.
8a. If leak detector is unavailable remove all refrigerant from system and
pressurize with nitrogen to 550 psi. Check that system holds pressure.
Repeat Step 8 to insure no more leaks are present
9. Evacuate and charge the system. Refer to the evacuation and charging
section of this manual. While the unit is being evacuated, seal all openings on
the defective compressor. Compressor manufacturers will void warranties
on units received not properly sealed. Do not distort the manufacturers tube
connections.
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