Refrigerant Circuit With Restrictor and Reservoir

Refrigerant Circuit With Restrictor And Reservoir

HP (HD) High pressure side of refrigerant circuit

LP (ND) Low pressure side of refrigerant circuit







The pressures on the low pressure side are maintained at approx. 2 bar absolute pressure (corresponds to approx. 1 bar positive pressure) by the "regulating" compressor even at varying engine speeds. This however only applies within the output range of the compressor. If the output limits of the compressor are exceeded.

NOTE: On vehicles with A/C Compressor Regulator Valve N280 the pressure on the low pressure side is altered by actuating the valve.

Arrows show direction of refrigerant flow.

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

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







1 - Compressor, HP (HD) side
2 - Condenser
3 - Restrictor
4 - Evaporator
5 - Reservoir
6 - Compressor, LP (ND) side