Powered Humidifier on Harman PF100

[nateschisler]

I am attempting to install an Aprilaire Model 700 whole-house powered humidifier on my Harman PF100. The humidifier has a 120v plug (I assume to powere the fan) and 2-24v leads which normally you would connect to your furnace control board. Obviously the PF100 has no such thing. The idea is that when the blower kicks on, it also turns on the humidifier fan and opens the water valve (all via the 24v switch). So I am thinking that if I take the included 120-24v transformer, take a hot and neutral from the fan temperature switch mounted to the plenum, and connect the 2 leads from the transformer to the 2 leads on the humidifier, it should work the same way? When the temp switch calls for the blower, it closes the circuit and powers the transformer, which powers the switch in the units and opens the water valve and turns on the fan. Any help would be great...

 

[Alain S. Prevost]

Good ideas - post some pics of the install, wiring, items you bought for install etc.... I've been looking around for something for my pf100 as well. Been running ti the past two months and the house is starting to get a bit dry. Good luck and post pics with progress... thanks!

 

[Shaw520]

great idea,... someone should make a universal unit the can be installed right in the convection blower.

 

[Northwoodneil]

I have a Honeywell on my furnace,( can't think of the model #) it has it's own 24v transformer and a sail switch that is installed in the cold air drop to turn it on when the fan runs. It has worked flawlessly for 2 years. I liked the unit because it mounts outside of the duct work so if it would ever leak or overflow my heat exchanger stays dry.

 

[nateschisler]

Bump...help?

 

[hearthnleisure]

Did you ever have any luck with your humidifier setup? I am looking to do the same setup with an Aprilaire 700 and a pf100 furnace and would appreciate any input.