Will Carrier 58MVC AND 25HNA6 work with Nest?

[kingsingh]

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/

[mark beiser]

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.

[ch4man]

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

[kingsingh]

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.

[Gross]

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.

[kingsingh]

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?

[Gross]

http://lmgtfy.com/?q=nest+compatibility

[Gross]

its still a downgrade

[54regcab]

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.

[Brent Ridley]

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.

[Gross]

ecobee's are really neat. expensive as all get out, but neat. still would take the infinity

[kingsingh]

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?

[Brent Ridley]

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.