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Unico with Carrier Heat Pump

are set to factory specs. We do a ton of them this is the !st not to get a 35° coil


  • Jim Pompetti
    Jim Pompetti Member Posts: 552
    Unico system with Carrier Heat Pump

    1 1/2 Unico system with a matching Carrier 13 seer heat pump 410A . Heat load is about 10kbtu's , air flow around 325 cfm's . Line sets insulated both (attic job) . We can only get a coil temperature of 42° F .Unico calls for around 35° f coil temperature . The subcooling is 12° . Any suggestions.
  • don_185
    don_185 Member Posts: 312
    Not in order

    Overcharge unit,high humidity,too much airflow.

    I'm seeing some of the newer equipment only running a 5 degree subcool temps.

  • Jim Pompetti
    Jim Pompetti Member Posts: 552

    Everything is set up to factory specs
  • don_185
    don_185 Member Posts: 312
    Try this

    measure your suction line temps if its 18 to 20 degree below
    return temps then she fine.Head to the next one.
  • Marty
    Marty Member Posts: 109
    specs ?

    Which factory ?? carrier or unico. I have been wondering how well the 13+ seer stuff was going to play with unico's. Might want to try wrapping up part of the condensor coil without pulling any of the charge out and see what happpens.
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