Hose/Line HVAC: Description and Operation

REFRIGERANT LINES

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

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 fitting used to mount a serviceable high pressure A/C charge port valve.
- The downstream side also contains a fitting used to mount the dual-function pressure switch. A long-travel Schrader-type valve stem core is installed in the fitting so that the switch can be removed without discharging the A/C system.