Refrigerant Circuit With Expansion Valve

Refrigerant Circuit With Expansion Valve

HP (HD) High pressure side of refrigerant circuit

LP (ND) Low pressure side of refrigerant circuit







NOTE:
- Non self-regulating compressors are switched off by the relevant control module via the A/C Compressor Regulator Valve N280 at evaporator temperatures below 0 degree C.
- On vehicles with A/C Compressor Regulator Valve N280 the pressure on the low pressure side is altered by actuating the valve.
- Temperature and pressure in the refrigerant circuit in vehicles with two evaporators and two expansion valves correspond to those in vehicles with only one evaporator and one expansion valve (parallel switching).

Arrows show direction of refrigerant flow.

HD- High Pressure (HP) side of refrigerant circuit.

ND- Low Pressure (LP) side of refrigerant circuit.







1. Evaporator
2. Expansion valve
3. High pressure switch / high pressure sensor
- Different versions depending on vehicle
4. Service connection, HP (HD) side
5. Receiver
- Different versions depending on vehicle
6. Condenser
7. Pressure relief valve
8. Compressor, HP (HD) side
9. Compressor, LP (ND) side
10. Pre-volume
- Not present on all vehicles
11. Service connection, valve LP (ND)