Hose/Line HVAC: Description and Operation

NOTE: Whenever a refrigerant line is replaced, it is also necessary to replace the suction accumulator/drier.

The front condenser to evaporator tube contains high pressure liquid refrigerant. It has the following features:
- A fitting used to mount the A/C pressure transducer the A/C pressure cut-off switch. A long-travel Schrader-type valve stem core is installed in the fitting so that the A/C pressure transducer or A/C pressure cut-off switch can be removed without discharging the A/C system.
- A fitting used to mount a repairable high-pressure A/C charge port valve.

The rear 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 A/C manifold and tube is attached to the A/C compressor with O-ring seals and has the following features:
- the upstream side contains low pressure refrigerant gas and repairable low-pressure A/C charge port valve.
- the downstream side contains high pressure refrigerant gas and an integral non-repairable muffler.