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Thread: R-22 to R-438a conversions
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29-07-2013, 11:49 PM #1
R-22 to R-438a conversions
After 25 years of NH3 systems I am now installing and servicing residential HVAC systems. I am in need of advice from anyone who has converted a R-22 system(1.5 to 3.5 ton) to R-438a. The wholesalers all say it works great but they sell the stuff. An unbiased opinion on the subject would very helpful.
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Re: R-22 to R-438a conversions
Attached is a report on the Performance of R-438A in R-22 Refrigeration and Air Conditioning Systems. It is kind of a dry read but the information is informative.
http://docs.lib.purdue.edu/cgi/viewc...&context=iracc
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30-07-2013, 02:01 AM #3
Re: R-22 to R-438a conversions
Thank-you, all information is helpful.
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08-08-2013, 11:16 PM #4
Re: R-22 to R-438a conversions
Hi we did three now and they all worked ok but compressor went on 2nd unit after 2 months nothing to do with the change over. Went due to age . That's the main think to think of must R22 units are now around 15 years old , and spares are getting hard on some models to get . I think it best just to change the hole system.
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09-08-2013, 01:50 PM #5
Re: R-22 to R-438a conversions
Get new 410a system ..