Rewire Trane XV80 for 2 stage heating

Reply

  #1  
Old 02-10-13, 12:10 PM
Member
Thread Starter
Join Date: Feb 2013
Location: USA
Posts: 3
Received 0 Votes on 0 Posts
Rewire Trane XV80 for 2 stage heating

I currently have a -
Trane XV80, Aprilaire humidifier, and a Nest Thermostat.

My old wiring to the thermostat was for a single stage heater

I would like to change my wiring so the Nest controls the second stage heating and the humidifier.

I believe I know all the wiring I need to do (thanks to this site)- please correct me if it looks wrong -
- remove the jumper W1 to W2 at the furnace
- run a W2 from the furnace to the Nest
- change the wiring to the humidifier solenoid
- both wires from the solenoid going to the new 6AZU2 relay
- plus C from the furnace to the relay, and * from the Nest to the relay
- run a C from the furnace to the Nest

My question is do I need to change any of the dip switches in the furnace when I do this?
Also I have not bought the relay yet - will it be clear where to connect the four wires?

Thanks for the help.
 
Sponsored Links
  #2  
Old 02-10-13, 12:50 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,372
Received 10 Votes on 8 Posts
My question is do I need to change any of the dip switches in the furnace when I do this?
No.





Also I have not bought the relay yet - will it be clear where to connect the four wires?
Stat = terminal 1
furnace common = terminal 3
humidifier = 2 and 4.
 
  #3  
Old 02-10-13, 01:21 PM
Member
Thread Starter
Join Date: Feb 2013
Location: USA
Posts: 3
Received 0 Votes on 0 Posts
Awesome. Thanks the quick reply
 
  #4  
Old 02-10-13, 01:33 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,372
Received 10 Votes on 8 Posts
I like the picture that Hvactech drew describing your setup.

I have had bad luck with those small black peanut relays though.
I'm a big fan of the standard double pole double throw 24 volt coil relay.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


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