I just had a 75000 btu Reznor UDAP garage heater installed. Can I run a "C" wire for a smart thermostat if I don't have a C connection on the terminal strip? There is a C connection on the circuit board and an unused W2 connection on the terminal strip.
There are 4 connections on the terminal strip R, G, W1, W2. The current thermostat is connected to the R and W1 terminals. The G is connected to the circuit board from the terminal strip, but looks to be unused tight now. The W2 has nothing hooked to it, i.e bare terminals.
My question is, Can I use the G terminal (since it's connected to the circuit board already) to connect my C wire up (to provide 24V power to my smart thermostat), or should I connect a wire from the unused W2 terminal and connect it to the C terminal on the circuit board, and us that to run 24V power to the smart thermostat. Or is the heater just incompatible and I'll need to buy a battery operated wifi thermostat?