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Refrigerant Leak Testing
Because
Leak Rate
ASHRAE recommends that machines should be immediately taken off line and repaired if the refrigerant leakage rate for the entire machine is more than 10% of the operating refrigerant charge per year. Additionally, Carrier recommends that leaks totalling less than the above rate but more than a rate of 1 lb (0.5 kg) per year should be repaired during annual maintenance or whenever the refrigerant is pumped over for other service work.
Test After Service, Repair, or Major Leak
If all refrigerant has been lost or if the machine has been opened for service, the machine or the affected vessels must be pressured and leak tested. Refer to the Leak Test Machine section to perform a leak test.