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  1. #1
    Join Date
    Jul 2013
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    Hmm Going from a R-22 system to a R-410A

    Going from a R-22 system to a R-410A
    Should the copper tubing be changed out?

  2. #2
    Join Date
    Nov 2006
    Athens, Ohio
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    Manufacturers recommend it if it is possible. A new lineset will prevent objections in the event of a warranty claim.
    If the lineset cannot be replaced it should be blown out with dry nitrogen. The purpose is to ensure that no mineral oil remains in the old lineset that could potentially contaminate the lubricant in the new system.

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