I have a new furnace that did not come with a humidifier and I'd like to put one on - I've done some basic wiring in the past, but it's not my strong suit and I'm a little confused :)
Here's where I'm confused. According to this wiring document for the humidifier, it says to use the 110v -> 24v converter to power the solenoid (bottom right of the left hand diagram):
However, I've read a lot of articles online that say that some furnaces already have a dedicated 24v connection I could use instead (as long as it's not the blower connection) - does that make sense? The furnace is an Amana AMS81005CXAC, and the hookups are here (thermostat wires come in on the right):
The circuit board says "Emerson Climate Technologies" and has what looks to be an unused/unusable humidifier hookup on the left? I don't have a manual for this board, so I don't know.
The AMS8 manual has only this to say about a 24Vac humidifier: "The yellow wire connected to the ID Blower pressure switch is powered anytime the pressure switch is closed and provides 24VAC humidifier control. Remove the yellow wire and connect a field supplied jumper wire with a piggyback terminal to the pressure switch terminal. [...] Connect the COM side of the humidifier to the C terminal on the furnace control board or to the COM side of the 24VAC transformer."
So I guess where I'm at is:
Do I need to install a 110v outlet (there isn't one on or near the furnace) and use the included 110v -> 24v converter to power the solenoid? Do you see any places where I can hook up the solenoid power on the circuit board instead?