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Proposed procedure to charge retrofited R134a
Posted to HVAC Forum on 5/30/1999 13 Replies

Hello A/C gurus,

I have retrofitted quite a few R12 systems to R134a. I am a R134a believer because of the cost and environmental benefits. One problem I see is the general spec to charge R134a, 70-80% R12 amount is very vague. I followed this general spec f... Login to read more.

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