Refrigerant Oil
Approved Refrigerant Oils And Refrigerant Oil Capacities
NOTE:
- As PAG (polyalkylene glycol) oil is highly hygroscopic (attracts water), opened containers are to be immediately re-sealed so as to be air-tight.
- PAG oil from containers which have been open for a lengthy period is no longer usable.
Approved refrigerant oils
NOTE:
- 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 Parts List .
- 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 Parts List .
- 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) Parts List .
- Use is to be made for refrigerant circuits with "Zexel" or "Sanden" compressor of refrigerant oil with part no. G 052 154 A2 Parts List .
- 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) Parts List .
Capacities for refrigerant oil
NOTE:
- For compressor assignment ("Zexel", "Sanden" or "Denso"), refer to vehicle-specific Repair Information, Heating, air conditioning or Air conditioning and Parts List .
- 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, refer to Heating, air conditioning Air conditioning and Parts List .
Capacities for Audi A4 (8E_) 2001--> , Audi A4 Cabriolet (8H_) 2003-->
Characteristics of refrigerant circuit:
- Restrictor
- Reservoir
- "Denso" compressor with A/C Compressor Regulator Valve N280 (without A/C clutch) Heating, air conditioning and Parts List
- 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 A4 is equipped with different compressors depending on the engine and production period As replacement compressors of this type are supplied with different oil capacities, the exact part no. must be noted Air conditioning and Parts List .
- At the start of production, the compressor types in the first line of the table were supplied with a refrigerant oil quantity of 180 cu.cm. These compressors can be recognized from the index of the part number (8E0 260 805 with one index or with double index up to "AH"). In Model Year 2004 (as of approx. 01.04), a gradual change was made to other types of compressor with a refrigerant oil quantity of 120 cu.cm or 130 cu.cm. These compressors can be recognized from the index of the part number 8E0 260 805 (with double index as of " AJ") or 4F0 260 805 (and index "E" for vehicles with 8-cyl. engine) Parts List .
- 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.