On 10/23/2011 11:46 AM, Nate Nagel wrote:
Given this wiring diagram

http://www.patriot-supply.com/files/...-22528-02).pdf


there's no connection for a humidifier, is there...?

My brain is working slowly this morning and I'm annoyed at having to
search all over the place for part nos. etc.

this is for a Rheem RGEB-06EC-FS furnace which apparently uses a
47-22481-81 fan control board. The "Honeywell S-890G" has been replaced
at some point with a S8910U. The schematic on the actual cover is
slightly different from the PDF and labels the blower control as a
"Honeywell ST780C" (or maybe 788? I took a photo of it and reinstalled;
photo is not as clear as it could be) Also "IDM board" is not present on
schematic on cover.

thanks

nate


Followup: looking at this diagram

http://www.alpinehomeair.com/view.cf...1-3B9839F377F0

it seems that I could just pull some thermostat wires from the furnace
control board and piggyback off the "W" and "C" terminals (I'm assuming
W is White e.g. heat and C is common) to only energize the humidistat
when the thermostat is calling for heat... yes? No problem with that
plan? (I could get rid of the sail switch and separate transformer if I
did it that way, too...)

Yeah, I don't really know what I'm doing, but I do know enough to see
that the way this installation that I'm messing with was done is kind of
Rube Goldbergian and also does not lock out the humidifier when the A/C
is on which is the main reason why I'm trying to redo it.

nate


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