Thanks for the reply, Jay.
Reading your post forced me to take a second look at the wiring diagram on the furnace. It's a good thing you pointed-out that the "HUM" connection on the furnace's control board is 120v.
Just to confirm, you stating that it's OK to tap the same "R" and "C" connections on the furnace's control board to power both the thermostat and humidistat? I spoke with an electrician and he thought it might be best to tap a new power source for the humidistat and leave the furnace control board alone. That, however, would require me to have 2 step-down transformers (one for the power and one for the HUM wire.) |