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1. Remove ALL refrigerant by using an approved method (EPA).
2. Determine if failure caused refrigerant and/or lubricating oil to be contaminated.
a) Check color of refrigerant and/or oil. The oil can be tested using an oil test kit.
3. Flushing agents are NOT recommended. Use nitrogen to flush or purge system
as necessary.
4. Use a torch and purge with nitrogen to remove piping and compressor as
a) The use of a low pressure nitrogen flow (in an open system to prevent
pressure buildup) during the compressor removal will prevent a black film to
form inside the piping and compressor, contaminating the system.
5. Install new compressor using the nitrogen purging process to prevent
contamination buildup.
6. Using nitrogen (high pressure) - check for leaks.
7. If no leaks are found, purge the system with nitrogen for a few minutes.
8. Evacuate system using a vacuum pump with clean oil.
a) Pull the vacuum to 500 microns for two hours. The micron reading should be
down to 200 microns after two hours.
9. Wire compressor following the factory wiring schematic.
10. Add the proper refrigerant charge following the factory specifications.
11. Start unit,
a) Check for amperage reading (not to exceed factory specification)
b) Check inlet vs discharge temperatures at the indoor unit. The temperature
difference should approximately 22°F to 25°F in coo ling.
Cleanup work site and repack tools – JOB WELL DONE!