Pressure and temperature specifications
- Refer to «A/C refrigerant system pressures and temperatures, checking»(ref-255032-S24148233652007052300000) and refer to «A/C refrigerant system, component overview»(ref-255032-S24613477172007052300000) for component identification.
| Component | Refrigerant State | Pressure (bar/psi) | Temperature |
|---|---|---|---|
| 1 - Evaporator, inlet to outlet | Vapor | Approx. 1.2 bar (17.4 psi) 1) | Approx. -7 ° C (19 ° F) 2) ) |
| 2 - Compressor, low pressure side | Gas | Approx. -1 ° C (30 ° F) 2) | |
| 3 - Compressor, high pressure side | Gas | Approx. 14 bar (203 psi) | Approx. +65 ° C (149 ° F) |
| 4 - Condenser | Gas, to vapor, to liquid | Approx. 55 ° C (131 ° F) at outlet | |
| 5 - Receiver drier | Liquid | Approx. 55 ° C (131 ° F) | |
| 6 - High pressure service valve | Liquid | ||
| 7 - Expansion valve | Liquid to vapor | Approx. 55 ° C (131 ° F) reducing to approx. -7 ° C (19 ° F) | |
| 8 - Low pressure service valve | Gas | Inlet: approx. 14 bar (203 psi) Outlet: approx. 1.2 bar (17.4 psi) | Inlet: approx. 55 ° C (131 ° F) Outlet: approx. -7 ° C (19 ° F) |
1) Pressure maintained in the refrigerant system by the variable displacement compressor despite variables in temperature, load and engine speeds (RPM)
2) Temperature maintained in the refrigerant system by the variable displacement compressor despite variables in temperature, load and engine speeds (RPM).
A/C Refrigerant System - Capacities
Subchapter links
Refrigerant R-134a, capacity. Refer to Refrigerant R-134a, capacity
Refrigerant (PAG) oil R-134a, identification. Refer to Refrigerant (PAG) oil R-134a, identification
Refrigerant (PAG) oil R-134a, capacity. Refer to Refrigerant (PAG) oil R-134a, capacity
Refrigerant (PAG) oil R-134a, distribution. Refer to Refrigerant (PAG) oil R-134a, distribution
Refrigerant R-134a, capacity
| Compressor | Manufacturer | Quantity |
|---|---|---|
| SD7V16 DCW-17D | Sanden Zexel | 750 + 50 g (26 + 1.8 oz.) |
Note. R-134a refrigerant is packaged in different containers. Some are used only for commercial applications which are sold in cylinders using a 1/4 flare fitting. This does not connect to the vehicle fittings and servicing equipment. Use only R-134a which come in containers having the correct type of service fitting. Refrigerant oil attracts moisture from the air. It is important that refrigerant oil containers are closed tightly immediately after use. Dispose of contaminated refrigerant oil following laws governing hazardous waste disposal. Do not combine any refrigerant oil with any other old oils such as engine oil or transmission fluid.
Refrigerant (PAG) oil R-134a, capacity
| Type | Production date | Capacity |
|---|---|---|
| Golf/Jetta with Sanden compressor | From 10.98 | 135 ± 15 cc* |
| Golf with Zexel compressor | From 11.98 | 115 ± 20 cc* |
*This is the total A/C system refrigerant oil capacity. Replacement A/C compressors supplied by the Parts Department are filled with 135 cc of refrigerant oil.