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24-09-2014, 12:10 AM #1
When is 407C not 407C, fractionation
Hi All,
First post here.
When is 407C not 407C, fractionation.
We have just done a refrigerant analysis on a 407c system that had a leak in the aircooled condenser. We lost maybe 40% of the charge. Total charge 60lb.
407C make up is: HFC-32 (23%), HFC-125 (25%), HFC-134a (52%).
Test results today are:HFC-32 (27%), HFC-125 (28%), HFC-134a (45%).
This shows a 7% loss of 134a.
AHRAE states a tolerance of +-2%? I think.
Does this test conclusion constitute a full system re-charge?
Cheers, Rob W