| Approved refrigerant oils |
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| The oils used with refrigerant R12 are not suitable for refrigerant R134a. |
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| The name of the compressor manufacturer „Nippondenso“ has been changed to „Denso“. |
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| The refrigerant oil developed specially and exclusively for R134a refrigerant circuits is not commercially available. |
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| Refrigerant oils specifically designed for each air conditioner compressor can therefore be obtained from the replacement parts range → Electronic parts catalogue. |
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| The use of other refrigerant oils may lead to system failure, as miscibility and thus also circulation with the refrigerant R134a (for air conditioner compressor lubrication) cannot always be guaranteed. |
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| The logo of the compressor manufacturer „Zexel“ attached to the air conditioner compressor was modified from „Zexel“ to „Valeo“ from year of production 2006 onwards (change in manufacturer's name). |
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| The refrigerant oil (G 052 300 A2) for use in refrigerant circuits with „Denso“ air conditioner compressors (old name „Nippondenso“) is also included in the retrofit kit (part number 4A0 298 107 A) → Electronic parts catalogue. |
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| Use is to be made for refrigerant circuits with „Zexel / Valeo“ or „Sanden“ compressor of refrigerant oil with part no. G 052 154 A2 → Electronic parts catalogue. |
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| Use can be made for refrigerant circuits with a „Delphi“ compressor of refrigerant oil with part no. G 052 154 A2 and refrigerant oil with part no. G 052 300 A2 → Electronic parts catalogue. |
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| For refrigerant circuits with „Zexel / Valeo“ 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) → Electronic parts catalogue. |
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| At present, the electrically driven air conditioner compressor (e.g. of „Denso“ type on the Audi Q5 hybrid) is filled with the same refrigeration oil as the mechanically driven air conditioner compressor of the same manufacturer (refer to rating plate on air conditioner compressor) → Electronic parts catalogue. |
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