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Goodman heat pump wiring

Discussion in 'Residential' started by ct_hvac_tech, Aug 2, 2012.

  1. ct_hvac_tech

    ct_hvac_tech I specialize in kicking ass.

    Messages:
    1,118
    Location:
    Connecticut
    1 - Are goodman heat pumps reversing valves energized in heat or cool? This particular condenser has an O terminal. I forget which is which when it comes to O and B.

    2 - what is the W2 terminal for? I'm assuming something to do with heating but why is it needed if the reversing valve is energized (or not?)

    3 - why is it called W2? All the diagrams say to wire it to the W terminal of the AHU, and to the W terminal of the stat. I always thought of W2 as a 2nd heat stage but the system in question is single stage HP only.

    I am a heat pump rookie so need a little help lol.

    This particular system is a goodman condenser, with a first company air handler and a Honeywell focus pro 6000 thermostat.

    What I want to happen is for the heat pump to be the primary (stage 1) stage and the oil fired boiler (this AHU has a hot water coil) to be the second stage.

    So, my next question is, do these condensers have a tstat in them that suts them down once it gets below a certain temp? Or would I have to wire in an outdoor sensor? Also, does the oil heat get hooked up to the emergency stage?
  2. Swampfox

    Swampfox Trailer Trash

    Messages:
    29,766
    Location:
    Hell Hole Swamp
    energized in cooling, most every brand is except rheem/ruud

    its to activate the auxiliary heat in defrost mode

    Y is the first stage heat, so typically the aux heat is W2 or second stage

    Goodman doesnt have an outdoor thermostat, what you need is a dual fuel kit, or better yet, a thermostat that has dual fuel capability, the Honeywell 8000 with an outdoor temp sensor would make things a lot easier, you just set it up to operate dual fuel and you are done.
  3. Swampfox

    Swampfox Trailer Trash

    Messages:
    29,766
    Location:
    Hell Hole Swamp
    if the water coil is after the heat pump coil, you can run both simultaneously, id hook it up conventionally and let it roll, use W2 and E to activate the boiler
  4. ct_hvac_tech

    ct_hvac_tech I specialize in kicking ass.

    Messages:
    1,118
    Location:
    Connecticut

    So do I jumper w2 and E?
  5. jrbenny

    jrbenny New Member

    Messages:
    28,656
  6. ct_hvac_tech

    ct_hvac_tech I specialize in kicking ass.

    Messages:
    1,118
    Location:
    Connecticut
    Thanks. Also, is there such a thing is like a thermistor I could get to wire in series that would shut the condenser down once the outdoor ambient got below a certain temp?
  7. Swampfox

    Swampfox Trailer Trash

    Messages:
    29,766
    Location:
    Hell Hole Swamp
    You can add an outdoor thermostat that will do that, Goodman OT18-60 I think in the part number
  8. IslandTech

    IslandTech working on it

    Messages:
    72
    Location:
    Ass in the sand, beer in hand
    Isnt Y cool, B com, G fan, O reversing valve, W heat, W2 secondary heat either strip or used on dual fuel? Thats how most Heat Pumps are:headscratch:
  9. ISOTHERMAL

    ISOTHERMAL senior member

    Messages:
    32,303
    Location:
    Green Acres
    Y=compressor period

    It is not necessarily heat or cool that would depend on if the unit uses O or B.

    Some stats have W, some don't
    Some haveW1, some don't
    Some have W2, some don't
    Some haveW3, some don't
    Some have E, some don't

    lots of varibles
  10. IslandTech

    IslandTech working on it

    Messages:
    72
    Location:
    Ass in the sand, beer in hand
    Too many variables, I was starting to like the infinity 4 wire systems, but I havent run accross one here yet
  11. jrbenny

    jrbenny New Member

    Messages:
    28,656
    Your VP8000 has settings for that. Just have to connect the outdoor sensor to S1 and S2.

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