Humidifiers and Dehumidifiers - Wiring an AprilAire 600A to a Bard Furnace

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Dubs73
10-11-09, 08:54 PM
I completed the whole install but Im stumped on the wiring. My furnace does not have a HUM or ACC hookup. Can someone walk me through where to go from here. I have the Humidifier hooked up to "H" on the Humidistat. I know ODT goes to the out door sensor. My problem with out the HUM where does the "R" "C" "W/G" "C" hook up and which one goes to the 24v transformer? I did some online research and some it confused me more. It seems it all has to do with the furnace you are hooking the humidifier up to.

Bard Furnace Model H120D48A

Some images of inside the furnace

http://i96.photobucket.com/albums/l171/6rkawa/IMG_1733-1.jpg

http://i96.photobucket.com/albums/l171/6rkawa/IMG_1734.jpg

Thank you in advance

Jay11J
10-14-09, 11:11 PM
That's an older furnace.

Did you get another transformer, and a sail switch or A50 relay for your humidifier?
Dubs73
10-15-09, 09:30 AM
This is what I did. I hooked up W/G to W and C to C, then wired the 24v transformer to the power (j box), then ran that to R and C on the Humidistat.

I didn't get any other transformers. It's up and running. I put it on test/reset and it opened the Water Valve on the Humidifier just as stated in the manual.

Jay11J
10-15-09, 09:32 AM
Looks like you got it! That what i was going to suggest.