Compressor Fitting HVAC: Description and Operation

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.