Quote:
Originally Posted by RB855
R-22 a bit more acceptable 90/370, but not oil compatible. R-290 was considered for some time, given 85/327, but seeing as r-134a was 51/260 which are much more manageable, and available in bulk right out of the bottle. It also works with the existing POE, and mixing a little PAG in wont hurt it as well (using automotive charging equip that has PAG in it, as well as the use of dyed oil for leak finding).
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R22 works fine with POE oil. I believe the issue with PAG oil is its low breakdown voltage, so it's best to avoid any of it in a high voltage compressor.
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