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The Development of a Retrofitting Procedure for CFC-12 Automotive A/C Systems to HFC-134a and P.A.G. Lubricant
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Abstract
Extensive vehicle fleet testing, followed by laboratory analysis of various vital parts of the air-conditioning systems, have been performed in order to develop a procedure for retrofitting existing CFC-12 automotive air-conditioning systems to HFC-134a.
Testing shows that a compressor in good condition that has previously been used with CFC-12, can be re-used with HFC-134a provided that the appropriate oil, desiccant and elastomer is used. Testing has also shown that flushing the system is not necessary.
The procedure in this paper was developed as a result of testing and proposes a procedure that will maintain an “acceptable” life of the compressor at a reasonable cost.
Citation
Ax, H., Jingu, N., and Komatu, S., "The Development of a Retrofitting Procedure for CFC-12 Automotive A/C Systems to HFC-134a and P.A.G. Lubricant," SAE Technical Paper 932906, 1993, https://doi.org/10.4271/932906.Also In
References
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- Corr S. Gregson R. D. Halse A. Lindley A. A. Dekleva T. W. “Retrofitting Mobile Air Conditioning Systems: The First Alternative Part 2” 1991 SAE International Congress and Exposition Detroit, Michigan February 27 1991
- Cohen A. P. “Retrofit Desiccant Requirements for CFC-12 Systems” 1992 International CFC and Halon Alternatives Conference Washington D.C. September 30 1992
- Atkinson W. Article “12 to 134a Retrofit - The Revolution Continues” “MACS Action” April 1993
- Saupe T. “Goodyear Galaxy Air Conditioning Hose for Ultra Low Permeation” March 9 1990
- Dekleva T. W. Colmery S. H. Corr S. Lindley A. A. Bresnahan J. “Retrofitting Mobile Air Conditioning Systems With HFC-134a - An Update” 1992 SAE Worldwide Pasenger Car Conference and Exposition Dearborn, Michigan October 1 1992
- Azami K. Hosoi H. Ishikawa N. “Lubricant Screening for HFC-134a Car Air Conditioning Compressor Reliability” 1990 SAE Passenger Car Meeting and Exposition Dearborn, Michigan September 17 20 1990 SAE Paper 901735
- Dekleva T. W. Colmery S. H. Corr S. Ax H. Davis N. Fisher I. “Vehicle Testing: Retrofitting Mobile Air Conditioning Systems with HFC-134a” 1993 SAE International Congress and Exposition Detroit, Michigan March 1 5 1993 SAE Paper 930230
- Fisher I. A. “A Compressor Manufacturer's View of Retrofitting R12 Systems with R134a” 1993 SAE International Congress and Exposition March 1 5 1993