90CS Quattro V6-2.8L (AFC) (1995)
Service Port HVAC: Description and Operation
High Pressure Service Valve
A - Service valve connection (soldered to front of condenser)
B - Schrader valve insert
C - O-ring
D - Cap with seal
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Use only the specified R-134a quick coupling connectors when servicing the refrigerant system
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Before removing the valve insert from the service valve, discharge A/C refrigerant system
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Always reinstall cap -D- over service valve
NOTE:
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Image shows the condenser and service valve of an Audi 100 model
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Only a high pressure service valve is used for A/C system servicing. A low pressure service valve is not installed in the A/C system. Carry out all
A/C system service operations (i.e. discharging, evacuating, and charging) through the high pressure service valve only.