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Re: Leak testing an empty system
Posted to HVAC Forum on 4/27/2005 2 Replies

Hi Dennis,

Tom is correct that a mix of R12 and Nitrogen or a mix of R134a and Nitrogen have never been officially authorized for "Trace Gas" testing. The only authorized refrigerant and Nitrogen "Trace Gas" is R22 and Nitrogen, which cannot be used in most ... Login to read more.

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