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