A4 Quattro Sedan V6-3.2L (BKH) (2005)
Service Port HVAC: Description and Operation
Quick-release Coupling Connections In Refrigerant Circuit
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Only valves and connections resistant to R134a refrigerant and the related refrigerant oils are to be used.
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There are different connections (OD) for high and low pressure sides.
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Discharge refrigerant circuit before removing valves or valve inserts.
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Always screw on sealing caps.
Arrangement in vehicle Heating, air conditioning or Air conditioning
Connections with Schrader valve
A. Service connection (soldered in)
B. Schrader valve insert
C. O-ring (for valve)
D. Cap with seal
Connections with primary sealing valve
CAUTION: Before unscrewing connection, connect service station and extract refrigerant. Refrigerant circuit must be empty to avoid possible injury.
Connection with high-pressure valve
1. Socket with external or internal thread
2. O-ring: 10.8 mm; 1.8 mm, identification: black or colored
3. Valve with groove for O-ring and external or internal thread M 8x1 for cap
4. O-ring for cap: 10.8 mm; 1.8 mm, identification: black or colored
5. Cap
Connection with low-pressure valve