Refrigerant Oil
Approved Refrigerant Oils
NOTE:
- As PAG (polyalkylene glycol) oil is highly hygroscopic (attracts water), opened containers are to be immediately re-sealed so as to be airtight.
- PAG oil from containers which have been open for a lengthy period is no longer usable.
- The oils used with refrigerant R12 are not suitable for refrigerant R134a.
- The name of the compressor manufacturer "Nippondenso" has been changed to "Denso".
- The refrigerant oil developed specially and exclusively for R134a refrigerant circuits is not commercially available.
- Refrigerant oils specifically designed for each compressor can therefore be obtained from the replacement parts range .
- The use of other refrigerant oils could cause system failure, as they do not always mix and thus circulate with refrigerant R134a (for compressor lubrication).
- There are different refrigerant oils for "Zexel", "Denso" and "Sanden" compressors.
- The refrigerant oil (G 052 300 A2) for use in refrigerant circuits with "Denso" compressors (old name "Nippondenso" ) is also included in the retrofit kit (part number 4A0 298 107 A).
- Use is to be made for refrigerant circuits with "Zexel" or "Sanden" compressor of refrigerant oil with part no. G 052 154 A2 .
- For refrigerant circuits with "Zexel" compressors, use can be made of both the refrigerant oil (G 052 154 A2) and the refrigerant oil (G 052 200 A2) contained in the retrofit kit (part no. 4A0 298 107).
Refrigerant Oil Capacities
NOTE:
- For compressor assignment ( "Zexel", "Sanden" or "Denso" ), refer to vehicle-specific Repair information.
- With "Zexel", "Denso" and "Sanden" compressors, the amount of refrigerant oil in the replacement compressor corresponds to the total quantity of oil to be added. On compressor replacement, the quantity of refrigerant oil in the compressor to be installed must therefore be adjusted (an incorrect refrigerant oil quantity will damage the compressor).
- When pouring refrigerant oil out of replacement compressor (or malfunctioning compressor), a small quantity of oil generally remains in the compressor (20 to 30 cu.cm ). This refrigerant oil does not affect the function of the air conditioner and can therefore be ignored (always remains in compressor).
- Following initial switch-on, the refrigerant oil is distributed throughout the entire refrigerant circuit.
- For refrigerant oil replenishment quantities on replacing malfunctioning refrigerant circuit components.
Audi TT
Characteristics of refrigerant circuit:
- Expansion valve
- Receiver
- "Sanden" or "Zexel" compressor
NOTE:
- The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted.
- Exclusive use was made at the start of production of "Sanden" compressors. With effect from Model Year 1999, use was also made of "Zexel" compressors.
Capacities for Audi A3
Characteristics of refrigerant circuit:
- Expansion valve
- Receiver
- Compressor from various manufacturers with A/C Compressor Regulator Valve N280 (without A/C clutch).
NOTE:
- The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted.
- Different compressors are installed depending on production period and engine.
- At the start of production, exclusive use was made of compressors of type "7 SEU 16" from "Denso" (e.g. compressor with part no. 1K0 820 803 up to index "D" ). In Model Year 2004 (as of approx. 10.03), a gradual change was made to a different type of "Denso" compressor ( "7 SEU 17" e.g. compressor with part no. 1K0 820 803 as of index "E" ).
- With effect from Model Year 2004 (as of approx. 10.03), "Zexel" (type "DSC17E" ) and "Sanden" (type "PXE16" ) compressors are also gradually being introduced depending on engine.
- This compressor is available as a replacement part with different oil capacities and attention must therefore be paid to oil quantity in compressor as well as exact part number.
- The reason for the different oil quantities in the compressor for an otherwise identical refrigerant circuit is the design of the actual compressor. Attention is to be paid to these oil quantities. Too much oil in the circuit results in higher pressures and reduced system cooling output; insufficient oil can cause lubrication problems in the compressor.
- The compressor may have been installed at the factory with a rating plate indicating the part number and the quantity of refrigerant oil in the compressor.
Characteristics of refrigerant circuit:
- Restrictor
- Reservoir
- "Denso" compressor with A/C Compressor Regulator Valve N280.
NOTE:
- The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement the quantity of oil in the compressor is therefore to be adjusted .
- The Audi A6 is equipped with different compressors depending on the engine and production period.
- As of Model Year 2002, the Audi A6 features compressors with A/C clutch or regulator valve (different oil quantities) depending on the engine. This change is being introduced gradually for the Audi Allroad with 6-cyl. diesel engine in Model Year 2003.
- As the replacement compressor with A/C Compressor Regulator Valve N280 is supplied with different oil capacities, the exact part no. must be noted.
- The reason for the different oil quantities in the compressor for an otherwise identical refrigerant circuit is the design of the actual compressor. Attention is to be paid to these oil quantities. Too much oil in the circuit results in higher pressures and reduced system cooling output; insufficient oil can cause lubrication problems in the compressor.
- The compressor may have been installed at the factory with a rating plate indicating the part number and the quantity of refrigerant oil in the compressor.