Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 12-06-2008, 10:06 PM   #1
Member
 
Join Date: Dec 2008
Posts: 38
Rewards Points: 25
Default

I want to learn about tstat wires...


This is just for knowlege becasue I'm curious...no particular problem to fix:

So I've spent the past two weeks trying to and sucessfully fixing my furnace but I have some nagging questions regarding the operation of the thermostat. Attached is a pic of how it is wired. I only have a gas furnace and no heatpump or ac or anything.

There are two wires a thin one and a thick one. One goes to my thermostat and the other goes to a mechanical dial thingamajig that lets me set the start time, length, and number of air cycles via metal plates. I do not know which wire goes to which but I suspect the thick wire with the yellow and blue not connected is the one going to the tstat.

I know a short between R and W on the control board initiates a call for heat, in this case from the tstat. There are other combinations like RG or GW shorts and others. What do these other combinations do?

What are the yellow and com terminals for and what other functions do you get?
Attached Thumbnails
I want to learn about tstat wires...-wires.jpg  

thealexdexter is offline   Reply With Quote
Old 12-06-2008, 11:23 PM   #2
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 25,497
Rewards Points: 2,678
Default

I want to learn about tstat wires...


R. 24 volt power supply out.
C. 24 volt common, A/C condenser common would connect here. Also common of thermostat if it needed a common.
W. Heat
Y. A/C, just a convience teminal on many older furnaces.
G. Fan

beenthere is online now   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
hooking up dryer....bronx ny code SURFBUG Appliances 6 10-14-2008 09:41 PM
Heil DC90 - AC Wires keithshank HVAC 1 07-31-2008 08:37 PM
replacing outlet with 3 white/3 black wires gpet573 Electrical 4 06-03-2008 02:55 PM
Two black wires with one white! Please help! ibs325 Electrical 15 11-18-2007 09:38 PM
Old house, new light fixture, too many wires Persephonee Electrical 3 01-15-2007 08:58 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.