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in the furnace you will attach 2 thermostat wires to R and G.
Then in the thermostat you choose to use you will wire the R wire to R....and the other wire to W.
So the R wire attaches to R at both ends...but the other attaches to W in thermostat and G in furnace.
bottom right side labeled noncommunicating thermostat
I see G will be utilized a different way...can you tell me the model number of the furnace please?
there is a chance that this is a air handler not capable of standard fan switch. If this is a 100% communicating system we may have an issue...the abcd, 1234 type wiring is data...not a 24v communication system.
Ok got model number and will check...just a moment
ok, do you mind a hands on test?
your unit is set up for communication data.
But I want to see if the standard r, y, c, w etc will engage a blower relay. On your board...not the diagram....is there a G in the line of R,Y,W,O,C?
well this one stumped me.
the system you have is communicating which means all heat, cool, fan, humidity is through your infinity wall control. This is not standard 24v.
Some systems are a hybrid...capable of either...yours is not. I have never added a secondary noncommunicating thermostat to a communicating system. I have done tons of wood burners and controls.....but not a fan control for wood burner on a communicating system. I will opt out and see if anyone has an idea without messing with the communication system