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  1. #1
    Join Date
    Jun 2008
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    Coquitlam
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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: http://www.nest.com/
    Attached Images Attached Images  

  2. #2
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
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    Why would you want to downgrade your Infinity system by installing a Nest thermostat?

    If you are wanting control via internet, and a better looking control, look into the WiFi capable Infinity control.
    If more government is the answer, then it's a really stupid question.

  3. #3
    Join Date
    Jan 2007
    Location
    Mn the state where absolutey nothing is allowed
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    1,468
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    so you want to spend lots of money and time to have a less functional control??

    what dont you like about the infinity?

    the nest is a neat thermostat, but to the carrier equipment its just another dumb stat. may as well find a t-87, its also round
    my boss thinks its possible to repeal the laws of physics

  4. #4
    Join Date
    Jun 2008
    Location
    Coquitlam
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    Quote Originally Posted by mark beiser View Post
    Why would you want to downgrade your Infinity system by installing a Nest thermostat?

    If you are wanting control via internet, and a better looking control, look into the WiFi capable Infinity control.
    To you it may look like a downgrade but to me I am moving into something modern. Check out the Iphone application and the features of the Nest.

  5. #5
    Join Date
    Aug 2011
    Location
    Lewes, DE
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    807
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    it is a downgrade.
    ive installed them...they are cool, but no where near as functional or as capable as the infinity control. get teh wifi infinity control if you want the iphone app.

  6. #6
    Join Date
    Jun 2008
    Location
    Coquitlam
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    You may be talking about the first generation unit. I am talking about the 2nd generation that just came out. So, I am sure you have not installed it yet. If you have installed the old one do you know the answer to my question?

  7. #7
    Join Date
    Aug 2011
    Location
    Lewes, DE
    Posts
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  8. #8
    Join Date
    Aug 2011
    Location
    Lewes, DE
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    its still a downgrade

  9. #9
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,636
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    looks like you want to be a beta tester for the new nest. look into the ecobee if you dont want the infinity control. If it was me, Id go infinity wifi.

  10. #10
    Join Date
    May 2009
    Location
    Cumming, GA
    Posts
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    Carrier has a new Infinity touch control. Go to www.myinfinity.carrier.com. This stat gives you all the options that Nest has...plus more. Including the IPhone Apps and remote technology.

    Upgrade to this.

  11. #11
    Join Date
    Aug 2011
    Location
    Lewes, DE
    Posts
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    ecobee's are really neat. expensive as all get out, but neat. still would take the infinity

  12. #12
    Join Date
    Jun 2008
    Location
    Coquitlam
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    I am not asking for advice on weather or not Nest is junk or not. I just want to know if it will work. Can someone please tell me if I stop using the ABCD connector, can I just wire my Nest to the 24V ports? Is this a transparent change? Will I need to adjust any jumpers?

  13. #13
    Join Date
    May 2009
    Location
    Cumming, GA
    Posts
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    The Nest thermostat will NOT work with the communicating equipment that you have. Nest is not a communicating thermostat. There will be no way to power the needed low voltage circuits.

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