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Thread: R502 Replacement.
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08-07-2004, 12:23 PM #1
R502 Replacement.
Got a Frozen Food Coldroom on R502 which due to leak on remote condensor has lost gas.
A company has been previous to my visit but no gas ID label is on unit. Exp valve is R502 so I will have to assume that R502 is what is in the system. Customer does not recall what engineer did on previous visit.
If I use R404A what oil do I need and do I need to do anything with expansion valve i.e orifice size (not sure of size at mo)?
Or is there another gas I could use that involves no oil change and minimal adjustments R407A for example?
Thanks
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