Note. For COMPRESSOR APPLICATION and REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS tables, see the A/C COMPRESSOR SERVICING article in the AIR CONDITIONING & HEAT section. DO NOT exceed A/C system refrigerant oil capacity when servicing system.
Only NEW, moisture-free refrigerant oil should be used in the air conditioning system. This oil is highly refined and dehydrated so moisture content is less than 10 parts per million. The oil container must be tightly closed at all times when not in use, or moisture from the air will be absorbed into the refrigerant oil.
PLACING SYSTEM IN OPERATION
After component service or replacement has been completed and all connections have been made, evacuate system thoroughly with a vacuum pump. Charge system with proper amount of refrigerant and perform leak test. See REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS TABLE in the A/C COMPRESSOR SERVICING article for system capacities. Check all fittings that have been opened. After system has been leak tested, check system performance.
Note. Most compressors are pre-charged with a fixed amount of refrigerant (shipping) oil. Drain compressor oil from new compressor and add refrigerant oil to new compressor according to amount removed from old compressor. Always refer to underhood A/C specification label or A/C compressor label while servicing A/C system.