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  1. #1
    Join Date
    Oct 2004
    Posts
    146
    Hello all...

    I hope someone can help me out.. Today at work i installed a Rheem heatpump and rheem air handler.. It has a heat pack ( heat strips ) and when i turn on heat, the heat pump never comes on... I am wiring a robertshaw 9420 tstat and have the following.

    R - red - 24 hot transformer
    E - Black - Emergency heat
    Y - yellow (y1) - cooling
    G - green - fan
    B _ Orange reversing vale energized in call for heat )
    C _ Common - comon side
    W _ White (w1)- heat

    electric strips come on and blow warm air , but heat pump not running..
    should i jump out W1 & Y1 -- on stat

    its a 2 heat 2 cool stat..


    I remeber having to do this on somekind of honeywell heatpump stat.. but you guys now how rheem & ruud arer with there wiring...

    help..




    [Edited by r247yan on 06-22-2005 at 09:58 PM]

  2. #2
    Join Date
    Oct 2004
    Posts
    146

    any ideas..... help please

    damn... i was hoping for a few suggestions... help

  3. #3
    Join Date
    May 2003
    Location
    Sarasota. Fl
    Posts
    1,237
    It looks like the stat is wired correctly.

    Does it have an O/B switch inside the stat?

    Do you have 24 volts at the condensor?

    Or at the A/H?

    Time to get the voltmeter out.
    It is the job of thinking people not to be on the side of the executioners.

    ~Albert Camus

  4. #4
    Join Date
    Apr 2005
    Location
    Tampa, Florida
    Posts
    1,634
    Originally posted by r247yan
    electric strips come on and blow warm air , but heat pump not running..
    should i jump out W1 & Y1 -- on stat
    Are you sure it's the HP version of that stat or if it's configured to run as an HP stat? It should be energizing the Y terminal upon heating. Also, how high are you setting the heat? maybe you're setting it too high and it's calling for the second stage of heat?

  5. #5
    Join Date
    Oct 2004
    Posts
    146

    robertshaw stat

    well i have to just remember a few things and get my volt meter out... i havent been back to that job since posting... job down in hamilton virgina.. ( It a fire restoration of building, so ill probably wont be back for a few weeks...

    i set the heat just 3 or 4 degrees and still have nothing.. On stat i see (2) two flames.. so i huess its calling for second stage.. i must not be getting a call for the heat pump.. Ill just have to spend a few minutes and just re-wire ... thanks alot for answering..

  6. #6
    Join Date
    Sep 2004
    Posts
    3,157
    I just connected the same stat to a lennox heat pump yesterday and the jumper depends on weather the reversing valve is energised on heat or cool

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