Nest E and a Bryant Evo connex....

Reply

  #1  
Old 10-26-20, 06:45 AM
C
Member
Thread Starter
Join Date: Oct 2020
Posts: 2
Received 0 Votes on 0 Posts
Nest E and a Bryant Evo connex....

Nest E and a Bryant Evo connex....
On the thermostat the wiring is ABCD which is green, yellow, white, red.
I have a humidifier and it controls it within the thermostat.
Best I can find in their install literature is that the green and yellow are "data" wires and the red and white are the power and common.

What would be the nest E setup i only have the 4 wires to play with no extra to use as the "star" nest output.
Is this even possible?
thanks

 
  #2  
Old 10-26-20, 09:50 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 60,919
Received 1,344 Votes on 1,242 Posts
Welcome to the forums.

I moved your post to its own thread.
Your Bryant is using communicating protocall. All functions on four wires.
With the nest.... if it's possible to use.... will need a wire for every function.

We need to know what your system is but 4 wires is not usually enough to convert to an analog thermostat.
Heat pump..... split A/C with gas furnace ???
 
  #3  
Old 10-27-20, 06:46 AM
C
Member
Thread Starter
Join Date: Oct 2020
Posts: 2
Received 0 Votes on 0 Posts
thanks, makes sense...
no heat pump, just a bryant NG furnace variable speed fan with an external AC unit and an Aprilaire cascading humidifier
this is the thermo to furnace interface wiring setup, can confirm in furnace the Hum is directly wired to the hum.
thermo wiring
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: