Hose/Line HVAC: Description and Operation

NOTE: Installation of a new suction accumulator is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator.

The condenser to evaporator tube contains high pressure liquid refrigerant upstream of the A/C evaporator core orifice.

The A/C compressor to condenser discharge line contains high pressure refrigerant gas. It has the following features:
- an integral non-serviceable muffler
- a fitting used to mount the A/C pressure cutoff switch. (A long-travel Schrader-type valve stem core is installed in the fitting so that the A/C pressure cutoff switch can be removed without discharging the A/C system.)
- a fitting used to mount a serviceable high-pressure A/C charge port valve

The A/C manifold and tube is attached to the A/C compressor, is sealed with O-ring seals, and has the following features:
- The upstream side contains low pressure refrigerant gas.
- The downstream side contains high pressure refrigerant gas and a port to mount the A/C compressor pressure relief valve.

The accumulator to compressor tube has a fitting used to mount the A/C cycling switch. A long-travel Schrader-type valve stem core is installed in the fitting so that the A/C cycling switch can be removed without discharging the A/C system.