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.
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 result in serious injury or death.
8.Pressurize with a combination of
Halide leak detector. Recover refrigerant and repair any leaks found.
Repeat Step 8 to insure no more leaks are present.
9.Evacuate the system with a good vacuum pump capable of a final vacuum of 200 microns or less. The system should be evacuated through both liquid line and suction line gauge ports. 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.
CAUTION
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.
10.Recharge the system with the correct amount of refrigerant. The proper refrigerant charge will be found on the unit rating plate. The use of an accurate measuring device, such as a charging cylinder, electronic scales or similar device is necessary.
SPECIAL PROCEDURE IN THE CASE OF MOTOR COMPRESSOR BURNOUT
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or installation.
Failure to do so may result in personal injury, or death.
WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant and oil under high pressure.
Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants.
Failure to follow these procedures could result in serious injury or death.
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 result in serious injury or death.
1.Recover all refrigerant and oil from the system.
2.Remove compressor, capillary tube and filter drier from the system.
3.Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent. Use approved flushing agent to remove all contamination from system. Inspect suction and discharge line for carbon deposits. Remove and clean if necessary. Ensure all acid is neutralized.
4.Reassemble the system, including new drier strainer and capillary tube.
5.Proceed with step
20
