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Evacuation needed for HFC is to be as low as 100 Microns. Is such low levels needed for HCs also?

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Evacuation needed for HFC is to be as low as 100 Microns. Is such low levels needed for HCs also?

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HCs can be evacuated to the same levels as CFCs i.e. at least 500 Microns. Moisture can be as detrimental in an HC system as in a R12 system. Further the solubility of HCs in oil as well as the solubility of moisture in HCs is higher than in the case of CFCs. Therefore it is better to evacuate HC systems to at least 500 microns and for HFC system is at least 200 microns.

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