Refrigeration System

Compressor:

The A/C compressor is belt driven from the engine crankshaft through the compressor clutch pulley. The compressor pulley rotates without driving the compressor shaft until an electromagnetic clutch coil is energized. When voltage is applied to energize the clutch coil, the clutch plate and hub assembly is drawn toward the pulley. Magnetic force locks the clutch plate and pulley together as one unit to drive the compressor shaft.

When the compressor shaft is driven, the compressor pulls low-pressure, low temperature vapor from the accumulator; compresses it into high-pressure, high temperature vapor; and pumps it into the condenser. Carried with the refrigerant is the refrigerant oil which is used to lubricate the compressor.

The compressor is equipped with a pressure relief valve and an A/C high-pressure cut-out switch which are placed in the system as safety devices.