Results 1 to 5 of 5
  1. #1
    Join Date
    Jan 2010
    Location
    Van Buren Arkansas
    Posts
    16

    York Heat Pump Controls

    Originally, This was a 7 wire set up; but, I changed out the York, with a Goodman 5 wire heat pump, and kept the York air handler. The (X) @ t-stat, is wired to W2,with W at the outdoor unit the (W) @ t-stat is wired to W1, I put a jumper between W1 & W2. (O) is with O, (Y) is with Y, (G) is with G, (B) is with B, and one wire is clipped. I tested it in heat pump, with t-stat 5 deg. above rm. temp., it came on with compressor, and aux heat light on, then backed off to 1 deg. above rm. temp, aux light, went off compressor still running. Then turned system to Emergency heat; Light is on, no compressor. I think it's doing what it should be doing, but, wanted someone to help me understand the function of it, better than I currently do.

    Thanks

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,318
    Goodman mismatched (gasp) or did you at least install a matching Goodman indoor coil?

    Sounds about normal if the backup comes on in em heat.

  3. #3
    Join Date
    Jan 2010
    Location
    Van Buren Arkansas
    Posts
    16
    No, baldloonie, coil is York, I just changed outdoor to Goodman. 2 ton heat pump, for the coil; ofcourse the old unit was 10 years old; so, the SEER is different, I didn't know that I should match the coil with the Heat pump, figur'n it was near target capacity.
    You mentioned, as long as back up comes on, in Emergency heat. From my post, I mention that I manually switched it to Emergency heat, and it came on. Is this what you are refering to?

  4. #4
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,318
    Sounds like wiring is good.

    Mismatched indoor coil with a heat pump is really asking for trouble. Biggest problem comes in the heat mode when the indoor coil turns into the condenser. Heat mode needs less refrigerant than cooling so already there's an issue. Couple that with a smaller indoor coil from a lower SEER system and you could get to where you have to remove charge in the winter to make it heat without head pressure problems. Then next summer, go back and add it in to let the system cool without freezing up.

  5. #5
    Join Date
    Jan 2010
    Location
    Van Buren Arkansas
    Posts
    16
    Quote Originally Posted by BaldLoonie View Post
    Sounds like wiring is good.

    Mismatched indoor coil with a heat pump is really asking for trouble. Biggest problem comes in the heat mode when the indoor coil turns into the condenser. Heat mode needs less refrigerant than cooling so already there's an issue. Couple that with a smaller indoor coil from a lower SEER system and you could get to where you have to remove charge in the winter to make it heat without head pressure problems. Then next summer, go back and add it in to let the system cool without freezing up.
    I know some systems have a charge compensator, but, all I saw on the Goodman was an accumulator. I suppose, if it begins to have problems, I will have to change the coil too. Could you talk to me a little more about heat pump coils?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event