Hose/Line HVAC: Description and Operation

NOTE: Installation of a new suction accumulator/drier 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/drier.

The aft condenser to evaporator tube contains the A/C evaporator core orifice. When the A/C system is in operation:
- there is high pressure liquid refrigerant upstream of the A/C evaporator core orifice.
- there is low pressure liquid refrigerant downstream of the A/C evaporator core orifice.

The forward condenser to evaporator tube is equipped with a serviceable high pressure A/C charge valve port.

The evaporator to accumulator/drier suction line contains low pressure refrigerant gas and is equipped with a serviceable low pressure A/C charge valve port.

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 and an integral non-serviceable muffler.
- The downstream side contains high pressure refrigerant gas and an integral non-serviceable muffler.
- The downstream side also contains a serviceable A/C compressor pressure relief valve and a fitting used to mount the A/C pressure transducer. A long-travel Schrader-type valve stem core is installed in the fitting so that the A/C pressure transducer can be removed without discharging the A/C system.