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  1. #14
    Join Date
    Jul 2009
    Location
    South Carolina
    Posts
    3,066
    I'm pretty sure the 13 minimum came out in 2006 and the no more R-22 units came out in 2010 so there is a 4 year gap.
    In 2006 Goodman started rating their air handlers for both R-410A and R-22 on the unit plate. I've noticed now that their air handlers are only rated for R-410A. My guess is after the law went into effect for R-410A they dropped the R-22 rating.
    Gary
    -----------
    http://www.oceanhvac.com
    An engineer designs what he would never work on.
    A technician works on what he would never design.

  2. #15
    Join Date
    Aug 2004
    Location
    Chapel Hill
    Posts
    73
    i always wonder if the flush really can help with the old R22 oil.
    it happened once to me that even i replace the filter plus using the flush.
    there is still some acid inside the unit.

  3. #16
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,708
    Quote Originally Posted by 54regcab View Post
    If it is 13SEER it makes me wonder what killed the relatively new outdoor unit. Didn't the 13SEER minimum hit about the same year that R22 systems weren't supposed to be installed anymore? But I agree, if coil size and pressure ratings are the same there shouldn't be any differences between R22 and 410 coils. IMHO newer coils are using thinner copper, hence why we find so many leakers.
    No one said it wasn't a new air handler installed on an old R22 condenser. And now the old condenser died.
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  4. #17
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,708
    Quote Originally Posted by rebeltech View Post
    Hi guys,
    I have a techs saying that..."you can replace the outdoor 410a 13seer without replace the indoor r22 13seer coil". Just flush the lineset and run nitrogen through the coil to use for r410. I would like to get some opinion on it.
    Thanks
    Yes, you can do it. Just need to give it a good flushing.
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