110V HUM to 24V humidifier
#1
02-01-09, 09:30 AM
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110V HUM to 24V humidifier
I have a Heil furnace with Hwell controller. It has male HUM contacts at 110V. I bought a humidifier with a transformer 110to 24V. I cannot hook the humidifier direct to the HUM terminal. But I cannot find a 24Volt that cycles with the furnace turning on off. I also have an EWC control panel for the dampers. It seems crazy to me that I cannot find a 24V tap to go direct to the humidifier. Any ideas?
Thanks
Thanks
#2
02-02-09, 09:29 AM
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Location: Rochester, Minnesota
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You wire the transformer to the 120v HUM terminal on the furnace and then wire the low voltage side to your humidifier/humidstat.
What is the make and model is the humidifier?
What is the make and model is the humidifier?
#3
02-03-09, 02:37 PM
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it is a desert spring. The Xformer is came with is a 110V two prong (household). I could use it and add wires with terminators from the HUM to it, but it seems silly. I already have 24VAC - isn't there a place where it is live only when the fan is on? As I said I have an EWC damper control panel. But I checked it and did not see a relay cycle with the fan. Buying a switch or relay seems Xpensive compared to wiring the Xformer. But I am still surprised off the thermostat or something I cannot get 24V that cycles with the fan.
Jay, thanks for the help. I read alot here looking for a similiar post. You do a great job.
Jay, thanks for the help. I read alot here looking for a similiar post. You do a great job.
#4
02-03-09, 06:39 PM
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You could try this.
Take the two wires from the humidifier it self, and wire it to W and C on the furnace.
If the furnace acts up, then we have to remove it, and use the transformer. With this, then I would suggest to mount a single outlet on the side of the furnace, and wire the outlet to the HUM on the board.
Take the two wires from the humidifier it self, and wire it to W and C on the furnace.
If the furnace acts up, then we have to remove it, and use the transformer. With this, then I would suggest to mount a single outlet on the side of the furnace, and wire the outlet to the HUM on the board.
