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  1. #1
    Join Date
    Jun 2008
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    Will Carrier 58MVC AND 25HNA6 work with Nest?

    My unit is connected to the Infinity Control thermostat that uses the ABCD wires. I did notice that both my furnace and heat pump both support 24V thermostat hook-up. Please see attached diagram. Can I just pull out my Infinity Control unit and replace it with Nest? Do I need to configure any jumpers and the 24V thermostat hookup? Also, is the 24V thermostat designed to work with non-carrier thermostats? Here is the details on Nest:

    It can control:

    Heating: 1, 2 and 3 stages (W1, W2, W3)
    Cooling: 1 and 2 stage (Y1, Y2)
    Heat pump: with auxiliary and emergency heat (O/B, AUX, E)
    Humidifier or dehumidifier (HUM, DEHUM)
    Fan (G)
    Power (C, Rh, Rc)
    Nest’s connector can accept only one of these wires:

    W3, E, HUM or DEHUM

    Link to the product:
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