A4 Quattro Wagon L4-1.8L Turbo (ATW) (2000)
Refrigerant: Description and Operation
R-134a Pressure & Temperature Relationships
Refrigerant System (R-134a), Pressure & Temperature Relationships
NOTE: The pressures and temperatures in the A/C refrigerant system vary depending on Engine Speed (RPM), coolant fan speed, engine temperature,
whether A/C clutch is engaged or not, outside temperature, humidity, etc.
Pressure and temperature specifications are based on the following:
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Engine running for approx. 20 minutes
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Engine Speed (RPM) 1500 - 2000
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Outside (ambient) temperature 20 °C (68 °F)
NOTE:
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Small arrows indicate direction of refrigerant flow.
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Low side pressures are regulated and maintained within certain tolerances by the variable displacement compressor independent of
compressor speed.
1
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Compressor, high pressure side
2
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Condenser
3
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Restrictor
4
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Evaporator