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Insulation Gas hvdc leak check wika

Proper HVAC Leak Detection - Refrigeration Technologies· 3. If a leak is sensed, strip off insulation and apply BIG BLU to all pipe surfaces. If no leak was positively screened, test liquid line. 4. The liquid line almost always has oil residue as the result of leakage. Coat all suspected liquid line connections with BIG BLU allowing sufficient time (10-15 minutes) for microfoam expansion.

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