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  #1  
Old 08-08-2006, 03:55 PM
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Why not R22?

This is just a hypothetical stupid question (so don't flame me), can an auto a/c system that was running R12 and mineral oil use R22? as a top off or complete fill? Both refrigerants use the same oil, same manifold gauges right? pressure are similar? my R12 30lb is almost gone but I have a full R22 30lb.
I know shops use R22 and nitrogen to pressure test.

why would it not work, what problems could one expect?
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Old 08-08-2006, 04:05 PM
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The answer you are probably looking for is the pressure of R-22 is to high for a belt driven (r-12)compressor. The other answer is it's illegal.
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Last edited by TX76513; 08-08-2006 at 04:19 PM.
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  #3  
Old 08-08-2006, 06:03 PM
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R-22 was desigend for single speed (electrically operated) compressors. R-12 is for multi speed (automotive type) compressors. Now the fun part. R-12 was also used in refridgerators.
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