Carrier Thermostat Q674L 1454 to Honeywell T8 - http://www.hvacmechanic.com/ Forums
Original message
| lngroller
 |  "Help Q674L 1454 to Honeywell T8611G 2028"
, posted Wed 10 Sep 12:38:  
I have a Goodman split system heat pump currently controled by the carrier (honeywell?) Thermo Q674L 1454 On the Q 674 here is the wireing.
O - orange
W2 - White
C - Blue
L - not used
Y - yellow
E - Brown
G - green
R - red
On the T8611G 2028 according to the manual, here are the choices
C - I assume blue
Y1 - I assume yellow
G - I assume green
O/B - I assume orange
E - I assume Brown
W2 - I assume White
W1 - leave unconnected?
R - I assume red
X1 - The instructions sem to show this jumpered to "C" is this correct?
X2, L, OT, and OT I assume all left unconnected?
Is the above correct? any other comments or installer set up functions that should be changed from defaults?
EDIT: I see Y1 and W1 are jumped as the thermo came out of the box. Is that correct? If so then my above assumptions are incorrect. help please
Thank you,
Dave
[this message was edited by lngroller on Thu 11 Sep 08:30] |
| Replies:
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| Houston204
| "Re(1):Help Q674L 1454 to Honeywell T8611G 20" , posted Thu 11 Sep 23:14
I agree with your new wiring.
C = blue
Y1 = yellow
G = green
O/B = orange
E = brown
W2 = white
R = red
X1 does appear to jumper to C
The O/B terminal comes factory configured to O so that shouldn't need adjusting.
"Tip of the Day" Remember to remove power first.
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| | lngroller
| "Re(2):Help Q674L 1454 to Honeywell T8611G 20" , posted Fri 12 Sep 07:30
Thank you, It seemed simple enough but I wanted to be sure BEFORE I installed. I try to trouble shoot before I get in trouble. I guess most of the unused terminals on the new unit are for "mode" lights or features I don't have such as outdoor thermos etc.
Thank you very much for taking the time to answer a newbie question
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| | Houston204
| "Re(3):Help Q674L 1454 to Honeywell T8611G 20" , posted Fri 12 Sep 09:54
After wiring in your new stat, verify that the compressor starts with cooling and heating demand.
I just want to be sure that a jumper between Y1 and W1 is not required.
If it is not required I will remove it from this diagram.
"Tip of the Day" Remember to remove power first.
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| | lngroller
| "Re(4):Help Q674L 1454 to Honeywell T8611G 20" , posted Fri 12 Sep 11:39
Thank you, I'll have to double check later. I installed and stupidly checked emergency heat before standard heat. The compressor did run on standard heat after I installed the jumper. but I didn't check before jumpre because the display read "Aux heat" so I put the jumper on but it did the same thing. I then checked the compressor and it was runing. I will need to remove the jumper and test again. and see if compressor is running even with it saying AUX heat. I couldn't then smell the dust on the heat strips because I had already tested that and wasn't sure. will wait until cooler and test again.. It should NOT say AUX heat if just running the heat pump correct?
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| | Houston204
| "Re(5):Help Q674L 1454 to Honeywell T8611G 20" , posted Fri 12 Sep 12:49
AUX heat is stage 2 heat, so if you have a heating demand greater than 2 degrees both should run.
"Tip of the Day" Remember to remove power first.
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