Compressor HVAC: Description and Operation

TRS90 Compressor:

The Sanden TRS-090 scroll-type compressor is a fixed displacement type compressor. This compressor uses an integral thermal limiter switch to protect it from overheating. The system uses polyalkylene glycol synthetic wax-free refrigerant oil SP-15 PAG.

CAUTION: Cleanliness is extremely important. Clean the surfaces around the suction and discharge ports of the compressor before opening the system. If compressor is removed from vehicle, apply tape to the opened ports to prevent any contamination.

The compressor is driven by the engine through an electric clutch, drive pulley and belt arrangement. The compressor is lubricated by refrigerant oil that is circulated throughout the refrigerant system with the refrigerant.

The compressor draws in low-pressure refrigerant vapor from the evaporator through its suction port. It then compresses the refrigerant into a high-pressure, high temperature refrigerant vapor, which is then pumped to the condenser through the compressor discharge port.

The compressor cannot be repaired. If faulty or damaged, the entire compressor must be replaced. The compressor clutch, pulley, clutch coil, and thermal limiter switch are available for service.