Original message
| Stiner19er
 |  "Baystat 240 to Honeywell 7400"
, posted Wed 7 Nov 07:09  
I currently have a conventional Electric heat with central AC system and with this was a Trane Weathertron Baystat 240 thermostat. First of all, I think there was a heat pump outside for this unit at one time, b/c there were a lot of heat pump related wires connected in the baystat 240. Anyway, I've got the Honeywell working ok...the heating works fine...activates my heat strips and gets nice and warm. When I go to AC, nothing...compressor doesn't kick on. I think I just have 1 wire in the wrong spot. Here's the wiring...
From Wall > Old Baystat > Honeywell
Red > R > R (jumpered w/RC)
Brown > T > DISCARDED
Orange > O > DISCARDED
Green > G > G
Yellow > Y > Y
Black > X2 > E
Blue > B > C
White > W > W
Any help would be great!!!
-Dave
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Replies:
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| Houston204
| "Re(1):Baystat 240 to Honeywell 7400" , posted Wed 7 Nov 08:29
This wiring looks correct if you don't have a heatpump outside.
If you do have a heat pump connect orange to O and set option 170 to 9 and option 190 to 0.
What did you set option 170 to?
"Tip of the Day" Remember to remove power first.
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| | Stiner19er
| "Re(2):Baystat 240 to Honeywell 7400" , posted Wed 7 Nov 08:35
I set 170 to option 1. The main issue is when I turn the AC on, the compressor outside doesn't engage.
-Dave
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| | Houston204
| "Re(3):Baystat 240 to Honeywell 7400" , posted Sat 10 Nov 07:13
R = 24volt power
Y = compressor
G = fan
O = reversing valve to cool (heatpumps)
Aux = electric heat
E = emergency heat
Does the compressor run if you jumper R, Y, & G?
"Tip of the Day" Remember to remove power first.
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| | rehanad15
| "Re(4):Baystat 240 to Honeywell 7400" , posted Wed 5 Dec 21:03
I've been having the same problem. I do have a heat pump outside. I've connected everything properly, but my outside unit does not cut on when i'm trying to heat. Help is needed.
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