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  1. #1
    Join Date
    Apr 2006
    Location
    Northern Ireland
    Posts
    31
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    0

    controlling two Heatpumps



    Would like advice and comments on setting up following electric control for two heat pumps

    I wish to send a start signal to two 10kW heatpumps simultaneously.

    One of the heatpumps would have delay start built in, to avoid excessive current draw

    One of the heatpumps would kept running until water temperature reached 45C, the other would cut out at 48C.

    All advice appreciated

    Regards

    Johnf4@mac.com



  2. #2
    Join Date
    Aug 2009
    Location
    New Zealand
    Age
    59
    Posts
    2,556
    Rep Power
    26

    Re: controlling two Heatpumps

    Install a latching relay, when both stats are open break the latch, only when both stats are closed make the latch

    T1 on and T2 on = to energize latch "On"
    T1 off and T2 on = On
    T1 off and T2 Off = Off.

    Or even buy a smart relay (baby PLC) and do your timer in here as well

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