New tstat wiring question... - http://www.hvacmechanic.com/ Forums
Original message
| jerseyokie
 |  "New tstat wiring question..."
, posted Fri 13 Jun 10:13:  
Hi all,
A quick question regarding the wiring on my tstat.
My existing tstat is wired as follows
out of the wall are three lines
line 1 is R,Y,G
line 2 is R,W
line 3 is R,W
The tstat wiring is as follows
line 2 and 3 (W) to W on tstat
line 1 Y to (Y) on tstat
line 1 G to (G) on tstat
lines 1 & 2 R to (Rc) on tstat
line 3 R to (R) on tstat
New tstat has G W C Y R Rc
We have central air and hot water baseboard heat.
Should I just wire my new tstat(FocusPro 6110) the same way
Thanks again!
Eric
[this message was edited by jerseyokie on Fri 13 Jun 12:38] |
| Replies:
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| Houston204
| "Re(1):New tstat wiring question..." , posted Fri 13 Jun 20:53
Post the make and model of your old stat. Q674? ???? on the subbase?
"Tip of the Day" Remember to remove power first.
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| | jerseyokie
| "Re(2):New tstat wiring question..." , posted Fri 13 Jun 21:50
Q674? ???? on the subbase?
Does this mean Question 674?
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| | jerseyokie
| "Re(2):New tstat wiring question..." , posted Fri 13 Jun 20:58
Old tstat is Honeywell Magic Stat CT3300
Has W Y G R Rc
Much thanks!
Eric
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| | jerseyokie
| "Re(4):New tstat wiring question..." , posted Sat 14 Jun 11:07
Thanks Houston!
I posted earlier that my air handler would not shut off
and has to be turned off at the CB. Yuri suggested a
tstat which I needed to replace anyway. Got that done
but the blower still does not want to shut off. I have
a Post Purge Fan Delay ICM253 to replace the existing.
Should I try this as the next step? My only question
regarding this is the wiring.
The existing Fan relay has spades numbered 1,2,3 and 5
The replacement has spades numbered 1,2,3 and 4
Much Thanks!
Eric
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| | Houston204
| "Re(5):New tstat wiring question..." , posted Sat 14 Jun 11:35:
1 = G (to fan relay)
2 = R (power)
3 = C (common)
4 = G (Stat fan signal)
Where does your 5th wire currently connect?
Are you sure it isn't a 251?
"Tip of the Day" Remember to remove power first.
[this message was edited by Houston204 on Sat 14 Jun 11:57] |
| | Houston204
| "Re(6):New tstat wiring question..." , posted Sat 14 Jun 13:14:
You have 2 wires connected terminal #2. Looks like your old #5 is your new #4. Both relays only have 4 terminals. You have the correct relay.
"Tip of the Day" Remember to remove power first.
[this message was edited by Houston204 on Sun 15 Jun 11:45] |
| | jerseyokie
| "Re(7):New tstat wiring question..." , posted Sun 15 Jun 07:52
Hey Houston
Thanks for the info! BTW here is a picture of the existing
relay. I'm not sure how to link a pic directly to my post.
Thanks again!
Eric
http://www.flickr.com/photos/62451170@N00/2580433522/
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| | Houston204
| "Re(8):New tstat wiring question..." , posted Sun 15 Jun 11:57:
The ICM 253 is the correct replacement. Measure the length of time your old relay takes to turn off the fan after signal is removed and set your dial accordingly.
1 = G (to fan relay) tan w/insulated connector
2 = R (power) Red and yellow piggybacked wires
3 = C (common) blue wire
4 = G (Stat fan signal) unisulated tan wire
Be sure to remove power before your work.
"Tip of the Day" Remember to remove power first.
[this message was edited by Houston204 on Sun 15 Jun 12:33] |
| | jerseyokie
| "Re(9):New tstat wiring question..." , posted Mon 16 Jun 07:27
Thanks again Houston for the info!
Yea, my problem is that the AH just runs continuously
without shuting off so I am not sure how long to set the
relay for. My guess would be at 120 sec or a couple minutes?
Thanks again!
Eric
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