Humidifiers and Dehumidifiers - Wiring Humidifier without HUM connection

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80sarcade
12-13-08, 10:35 AM
I am installing a Desert Spring humidifier, it comes with a wall 24v transformer. I would like to wire to my Trane Xe80, Model TUD100C948B0, what appears to be my issue is it has a White Rodgers Model 50A50-405 control box, which does not have EAC/HUM connections. How should I connect this up? I do not see any transformers inside the furnace. Have picts if needed.

Thanks in advance
Paul

Jay11J
12-14-08, 03:36 PM
You could wire it right to W and C on the board instead of using the transformer. But if the furnace acts up, then we need to go back to the transformer.

Did the unit come with A50 relay or a sail switch?
80sarcade
12-14-08, 08:21 PM
No A50 or sail switch. The transformer states 200ma draw.

Thanks for the reply.
Paul

Jay11J
12-14-08, 09:26 PM
I suppose they don't use/or povide it since it don't matter much with this unit. The water is in a tray, and the disk turns all the time.. no harm with that.
80sarcade
12-15-08, 05:41 PM
Well I installed today. All went well and looks good, no leaks. :-)

Hooking it to the W and C appears to work fine.

Thanks for your help.
Paul
Jay11J
12-15-08, 06:25 PM
Thanks for the update, and glad to hear you are up and running.