seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

Test and measurement work that can be performed using a manometer > < Refrigerant circuit with expansion valve
Refrigerant circuit with restrictor and reservoir
   
Refrigerant circuit with restrictor and reservoir
Arrows show the direction of refrigerant flow.
A- low-pressure side of the refrigerant circuit.
B- high-pressure side of the refrigerant circuit.

   
ComponentOverall state of the refrigerantPressure (bar positive pressure)Temperature degrees Celsius
-1- Air conditioning system compressor B-sideGasup to 20 bar to + 70° C
-2- Condenserfrom gas through vapour to liquidup to 20 barto + 70° C
-3- Restrictorfrom liquid to vapourB-side up to 20 bar, A-side greater than 1.5 barB-side up to +60° C, A-side warmer than -4° C
-4- Evaporatorfrom vapour to gasgreater than 1.5 barwarmer than 4° C
-5- ReservoirGas  
-6- Air conditioning system compressor A-sideGas  

The pressures on the A-side are held at approx. 2 bar by the “regulating” air conditioner compressor even at differing engine speeds. This applies however only within the rated range of the air conditioner compressor ; if the rated range of the air conditioner compressor is exceeded, the pressure will increase → Chapter.
  Note!
On vehicles with A/C compressor regulating valve, air conditioning system -N280-, pressure on the low pressure side is varied by actuation of the valve.
   

Test and measurement work that can be performed using a manometer > < Refrigerant circuit with expansion valve