Hi guys,
I'm in need of some help.
I just bought a Robertshaw 9851i programmable thermostats (any comments?) and I'm not quite sure how to connect everything. My current thermostat uses the following wires:
Rh - Heat Transformer Rc - Cool transformer Y - Cooling Control W - Heating Control G - Fan control relay O - Cool active reversing valve B - Heat active reversing valve
The new one I just bought has these:
C - 24 VAC Common R - 24 VAC transformer G - Fan relay Y1 - Cooling Relay B - Heat active reversing valve W1 - Heating Relay O - Cool active reversing valve H - Humidity relay D - Dehumidity relay
The only thing I'm confused about is the "C" and the "R". Where do I connect my former Heat Transformer ("Rh") to? The C or the R? Would the Rc go to the C? I'm just not sure because their names don't correspond and I don't want to risk anything.
A black wire is connected to RC on the thermostat and the a red wire is connected to RH on the thermostat.
I went and checked the furnace and both the RED and BLACK wires are connected to "R". Does that I connect the black and red wires to "R" on the new thermostat?
Am I way off?? Any help would be much appreciated. I've done lots of research on the internet, but I'm getting a little confused.
Thanks in advance,
Jason