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Thread: holdover refrigeration
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24-04-2017, 10:24 PM #1
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Re: holdover refrigeration
R404a, why would you replace R12 with that.
Compare it on PT chart to see what I mean, totally different.
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24-04-2017, 11:03 PM #2
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Hey, I am new to : RE
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Re: holdover refrigeration
ok, i looked at PT chart in regards to R404a, i do understand that you must mean its higher pressure at the same temp (-10) when compared to R12 (almost 20 psi)
R134a will have less pressure at the same temp as R12.
I understand that some compressors will run into a vacuum when they get close to design temp for low temp applications. I get the basic temp and pressure relationship but not how its able to work fully.
So should i take my thinking back to replacing that R12 unit and replace with R134a?
what else should i look into for my situation?
