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Retrofit

johnjohn89
johnjohn89 Member Posts: 114
in A-C, Heat Pumps & Refrigeration
Hvacr experts if retrofit r22 to 407, which way need to be done first? adding the refrigerant or adding the oil first? When adding the oil to compressor whiles systems running or off? And if u adding oil during vaccum does it cause slugging compressor? Does oil vaporize when during vaccum condition? Thanks

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