Principles Of Operation

WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

To accomplish the transfer of heat, the refrigerant is circulated around the system, where it passes through two pressure/temperature regimes. In each of the regimes the refrigerant changes state, during this process the maximum heat absorption or dissipation occurs.

The low pressure/temperature regime is from the TXV, then through the evaporator to the compressor. The refrigerant decreases in pressure and temperature at the TXV then changes state from a liquid to a vapour in the evaporator to absorb heat.

The high pressure/temperature regime is from the compressor, through the condensor and receiver drier assembly to the thermostatic expansion valve. The refrigerant increases in pressure and temperature as it passes through the compressor; then releases heat and changes state from a vapour to a liquid in the condenser.

The operation of the A/C system is controlled by the ATCM. For additional information, refer to: CONTROL COMPONENTS (Description and Operation).