750mv vs 12v Thermostat Question UPDATE 2
Updated 29 Nov-- Update 2--29 Nov: got it to work. Not clear on the thermostat voltage for these things whether I can use the cheaper version or what. I want it for my furnace only set-up in the R...
Forum Discussion
BFL13 wrote:
https://xtronics.com/wiki/images/Thermostat.gif
Thanks. I don't follow your "going to the furnace" etc. I have the two ( neg and pos) 12v wires coming out the wall and onto the back of the existing Hydro flame mechanical thermostat. The pos wire is switched by the on/off and when on, by the sensor (spring coil thing).
He said it didn't matter which wire I put on W or R in this case. This new thermostat has batteries to run itself.
Ok here is the old one and it does have W and R but I am not sure the neg is really a neg ???? Page 5
http://www.atwoodmobile.com/manuals/furnaces/MPD%2033179%20SP%201.08.pdf
My 8500 11 manual has a better thermostat drawing. It shows "Terminal R- common" and Terminal W where the two wires go-- I have to go out and look at which colour goes where.
Connect one wire to the R terminal and the other wire to the W terminal.
