Original message
| rlb8s
 |  "Help, Janitrol to RTH740o programmable T"
, posted Sun 20 Jan 16:38  
I am replacing my upstairs Janitrol HPT 18-60 thermostat w/ the Honeywll RTH7400 programmable thermostat. The wires on the Janitrol are Y (yellow), G (green), R (red), O (orange), W2 (white), E (brown), & C (blue). These wires match up w/ the install diagram for alternate wiring (for heat pumps only). The problem is, I don't think I have a heat pump. I've checked Goodman units outside (CKL 42-1A & CPLE 24-1A) and my GMT power vented multi-position gas furnace inside and I haven't seen anything that says heat pump. So here are my questions:
1. Did I use the right wiring diagram guide?
2. If not, which should I use since the typical install and the alternate install for a conventional system doesn't reflect the E wire (does Y2=E?) and I don't have a W wire (does W=O).
3. When programming, what should I select for system type? I'm guessing 8, conventional multi-stage system (but I used the heat pump diagram, hence my dilemma)
If the Y2=E and the O=W then it appears I wired it correctly, but used the wrong page (ie, heat pump page instead of the typical install page). If they don't equal each other then I most likely will have to redo. Thoughts?
Thanks in advance and great site. Richard
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Replies:
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| Houston204
| "Re(1):Help, Janitrol to RTH740o programmable " , posted Sun 20 Jan 17:23
The CKL42 is straight cooling (and probably your downstairs since it's a 3 1/2 ton).
The CPLE24 is a heat pump and probably your upstairs.
C = blue
G = green
Y = yellow
O/B = orange
Rc & R = red
Aux = white
E = brown
option 170 = 7
option 190 = 0
"Tip of the Day" Remember to remove power first.
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| | rlb8s
| "Re(2):Help, Janitrol to RTH740o programmable" , posted Sun 20 Jan 18:15
Sweet. I guess I wired it correctly, but didn't set the options up right. I will correct it now. Thanks for the quick response!
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