I have an older furnace Model (Carrier 58sx) and I just bought a aprilaire 700 humdifer. Nun of the insruction are clear on the wireing. My question is does my furnace have a 24v out put signel that kicks on when the blower motor does. I do not see a HUM on the board. I found that the R and C are 24v consintly, but I want the humidifer to kick on when the blower does. So do I need to buy a 120v to 24v transmiter and tap into the blower. Im new to all this so any help would be great.
Also on my board I have the following Letters if that helps
also the humdifer is already pluged into a 110 outlet (constent power) im just looking for the 24v side to tell the humdifer when to kick on with the furnace. thanks again