Honeywell T8411R to RTH7400 Thermostat Change

Reply

  #1  
Old 06-23-15, 07:07 PM
4
Member
Thread Starter
Join Date: Aug 2012
Posts: 10
Received 0 Votes on 0 Posts
Honeywell T8411R to RTH7400 Thermostat Change

Hi,
I'm trying to change a Honeywell T8411R to a RTH7400 thermostat on a York 1.5 ton heat pump. The wiring is pretty straightforward, except for one wire that I'm not sure about. The T8411R is wired as follows:
G- Green
C- Blue
R- Red
W1- Jumped to Y
Y- Yellow
L- Black
W2- Jumped to E
E- White
B- Empty
O- Orange

Here's what I'm thinking on the RTH7400:
G- Green
C- Blue
R- Red
Rc- Jumped to R
Y- Yellow
L- Black
AUX (also labeled W2)- Jumped to E
E (also labeled Y2)- White
O/B (also labeled W)- Orange

What's confusing me is the fact that the Y is jumped to W1 on the 8411R. On the 7400, the wires have multiple labels as noted above, and where I think the orange should go is labeled O/B on one side and W on the other. It seems like I need to have the orange here, or is this actually the W that should be jumped from Y as it is on the 8411R? And is so, where would the orange go? Any advice is appreciated.
 
Sponsored Links
  #2  
Old 06-23-15, 07:17 PM
Houston204's Avatar
Forum Topic Moderator
Join Date: Oct 2009
Location: Texas
Posts: 7,423
Received 17 Votes on 14 Posts
Connect orange to the O/B terminal.

The new thermostat does not require the jumper between Y and W(1).

The new thermostat will energize the compressor with a heating or cooling demand (like your old one) when you configure it for heat pump operation.

Set function 170 to 7 and set 190 to 0.
 
  #3  
Old 06-24-15, 04:18 AM
4
Member
Thread Starter
Join Date: Aug 2012
Posts: 10
Received 0 Votes on 0 Posts
Thank You for the help!!!
 
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
 
Ask a Question
Question Title:
Description:
Your question will be posted in: