Aprilaire model 700 Humidistat questions (H-terminals) and water useage

[427Cobraman]

Hello all,


I have a question about the humidistat that comes with the model 700
humidifier. Do the "H" terminals provide 24V for the solenoid and fan
control or is it just a switched terminal that requires 24V? I'm
running constant 24v to power the humidistat. The reason I ask is I
wired this up assuming it simply switches an input and after running it

for a few minutes, the humidistat "H" terminal ckt burned up. Here is
how I have it
wired:
http://home.earthlink.net/~fiveliter8/hstat/aprilaire700.gif

As a side note, it seems like this unit wastes a lot of water to drain.

Isn't there an orifice in-line somwhere or do I need to regulate it?
Thanks,


Alex

 

[upand_at_them]

Does this help?
http://www.alpinehomeair.com/related/AA Humidistat Install Instructions.pdf

I think it drains a lot because it's designed to wash the pad and try
to keep it clean and prevent bacterial growth. Nope, you don't
regulate it.

Mike

 

[427Cobraman]

Thanks for the reply. That is the diagram that I have as well, and it
would appear I did indeed wire it wrong. I originally had it hooked up
exactly like the diagram but the solenoid would never come on (24V
never seen at those terminals), so that's when I thought it must have
24v supplied there.

Alex

 

[Geeshik]

My Aprilaire 700 humidifier has a blue inline orifice in the tubing for the outlet side of the solenoid valve.