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  1. #1
    Join Date
    Jun 2009
    Posts
    6

    Replacing an old A-Coil to match the Payne PA10

    I recently moved into a townhome that has the old 1971 Heil furnace.
    It is reportedly about 60% efficient and has 0% CO out the flue.
    I considered adding a 95% efficient furnace and even had the installer out here ready to install and he could not find a place to do the venting due to the layout. Bummer.
    In the process of asking questions, I had one person tell me that if I replaced the A-Coil on my unit that I would need to use a seer that matches the outside unit (I think called the condenser). The outside unit is a Payne PA10 which has a seer of 10. Is this really necessary for the longevity of the operating pair?
    I am in need of making the installation as inexpensive as possible and still be long lasting. I have a place to get used A-Coils and maybe someone knows where to get new seer 10 A-coils. I need a 2 ton A-coil.

  2. #2
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,793
    The indoor coil can be a Higher rated efficiency then the outdoor unit.

    Don't get a used coil.
    It could start leaking a couple days after you paid to have it installed.
    Then your just out more money.
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  3. #3
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,874
    Quote Originally Posted by tguyette View Post
    I am in need of making the installation as inexpensive as possible and still be long lasting.
    Nothing is impossible, but, that's pretty close.

  4. #4
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,613
    You may be stuck with an 80% furnace. Even that would beat the old one in heating costs.

    Is the indoor coil left over from 1971 or was it changed when the Payne was installed? If it is matched to the Payne it doesn't need to be changed. Otherwise, it should be.

  5. #5
    Join Date
    Apr 2009
    Location
    Pan Handle, Fl
    Posts
    600
    I agree, don't put in a used coil. Just like telling your kids not to put money in thier mouth because you don't know where it's been. Why spend money on a chance like that when it could lead to leaks and head aches. An a/c contractor can find you a match and get you going.

  6. #6
    Join Date
    Jun 2009
    Posts
    6

    More info on my system

    I have found new 10 SEER a coils available on ebay and would like to have that available for replacement if the if once the furnace is removed, the a coil is bad. I need to keep costs down for now as my income is pretty low right now. Also my old furnace runs great so maybe I do not need to do anything. I have purchased a Aprilaire Media filter that I would like to put in place so maybe I just need to replace the return air drop to put the filter in and let things go for right now.

  7. #7
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,793
    If those 10 SEER coils you found aren't rated matches to your outdoor unit.
    Then you still have no idea what capacity reduction you have.
    And may be worst off then switching to a new coil rated for 13 SEER equipment.
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  8. #8
    Join Date
    Jun 2009
    Posts
    6
    By Rated matches do you mean how many tons?
    These I found are all 2-ton units and my PA10 is 2 Ton.

  9. #9
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,793
    No.

    ARI rated to work with your outdoor unit.
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  10. #10
    Join Date
    Jun 2009
    Posts
    6
    so there is more than just matching tons and SEER rating. What does the ARI rating mean? Anywhere I can read up on it?

  11. #11
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,793
    It means its certified to have X capacity under X conditios.
    Those conditions are 95F outdoor temp, and 80F drybulb, 67F wetbulb temperature.

    ARI website, to read up on it.
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  12. #12
    Join Date
    Jun 2009
    Posts
    6
    would that be AHRI: http://www.ahrinet.org ?

  13. #13
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,793
    Yes. That is what it changed to now.
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    How many times must one fix something before it is fixed?

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