Air Conditioning

The air conditioning (A/C) system is a clutch cycling, fixed orifice tube type.

The A/C compressor is driven by the engine. The A/C compressor primes the gaseous refrigerant out of the suction accumulator and compresses it. The refrigerant heats up and is passed to the condenser core under high pressure.

At this point heat is drawn from the refrigerant by the air being forced past the cooling fins. Because of this heat loss, the refrigerant liquefies and leaves the condenser core.

An evaporator core orifice, which separates the refrigerant at high pressure from that at low pressure, is located between the condenser core and the evaporator core. This evaporator core orifice slows down the flow of the refrigerant from the A/C compressor, so that the pressure builds up in the condenser core.

After passing through the evaporator core orifice the liquid refrigerant expands in the circuit to the evaporator core. In the evaporator core the liquid refrigerant converts back into the gaseous state and this causes heat to be extracted from the air coming into the vehicle. The air therefore cools down and the moisture it contained is given up at the evaporator core. The refrigerant enters the suction accumulator and is primed up again by the A/C compressor.

The system is protected by the pressure transducer. The pressure transducer is used to control over pressure in the high side of the A/C system.