Changed Thermostat but getting constant Heat

Reply

  #1  
Old 09-19-08, 10:15 PM
Member
Thread Starter
Join Date: Sep 2008
Posts: 3
Received 0 Votes on 0 Posts
Changed Thermostat but getting constant Heat

Hi there, I have an oil fired in-floor heating system with 6 different Honeywell V8043C zone valves. I noticed in the installation guide that they recommend the use of the T86A or T822D thermostats.

I just purchased a couple NOMA thermostats to control some of the zones. Is it possible to use this thermostat?

When I pulled my old Honeywell T822C1124 thermostat off, there was a Red wire going to the R on the thermostat, and a White wire going to the Y on the thermostat.

I tried hooking up the red wire from the wall on the RH and the white wire from the wall on the W on my new the thermostat.

When I did this, it seemed like it would not turn the heat off. I was constantly getting heat passed through the infloor system.

So I put my old thermostat back on for the time being. Should I be connecting the White Wire to the Y on this thermostat? Or not even use it?

Thank You,
 
Sponsored Links
  #2  
Old 09-20-08, 07:14 AM
Jay11J's Avatar
Member
Join Date: Sep 2001
Location: Rochester, Minnesota
Posts: 18,427
Received 0 Votes on 0 Posts
Very odd that it would be wired to a cooling. (T822C is a cooling stat) Where T822D as stated on the manual is a heating stat.

On the zone valve itself, what wire is hooked up to the letters?
 
  #3  
Old 09-20-08, 07:37 AM
Member
Thread Starter
Join Date: Sep 2008
Posts: 3
Received 0 Votes on 0 Posts
I was wondering the same thing when I googled the thermostat number. I can't really see where the wires are hooked up on the zone valves. This house was built in 1994 and those are the original thermostats...
 
  #4  
Old 09-20-08, 01:13 PM
Jay11J's Avatar
Member
Join Date: Sep 2001
Location: Rochester, Minnesota
Posts: 18,427
Received 0 Votes on 0 Posts
The only thing I can think of is there any relays between the valve and t-stat?

For kicks, undo the old stat, and leave the wire undone. see if the system fires off... then touch the two wires and see if it stops.
 
  #5  
Old 09-20-08, 02:45 PM
Member
Thread Starter
Join Date: Sep 2008
Posts: 3
Received 0 Votes on 0 Posts
Thanks.. I think I'll just wait until my next furnace servicing and have it looked at.

Thanks for your help though...
Patrick
 
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: