Originally Posted by gljurczyk
No I was talking about the link you provided it showed h/p on it. If you do not have a h/p it should work with an a/c and furnace only....The honeywell you showed is a heat/cool only. The battery in the stat will take place of your supply voltage. Do you have 1) AC and 1) furnace? If you say your blue wire is the high speed fan wire hook that up in place of the green or gray that I mentioned before. Blue has always been ground on other units you only need 4 wires.
Ok, maybe I will go play later today. I only have one ac unit and one furnace, only one zone. I knew the stat is only a heat / cool stat with one fan speed but that is all I need in the trailer. I have an expensive good stat in the house and haven't used the program feature sense I retired.
I was given the thermostat diagram sheet from a "new" old style Dometic analog stat by a rv mechanic. It shows the field wiring as:
+7.5 as red or red/white
fur as white
hp/hs as violet or orange
cool as yellow
fan as orange or tan
gnd as black or green
Hi-fan as blue
The Dometic stat has three switches, heat / cool, fan auto or on and a high low for fan speed. I could add the fan speed switch to the new Honeywell but never used the low speed so why bother?
Inside of the Honeywell stat there is a switch to set for a gas/oil furnace or an electric or heat pump. I have no heat pump so left it set on gas/oil, so that should not be a problem.