Wirering HE220A1019 humidifier to furnace

HI

I have similar isssue with HE220 but in my case the water run through all ththe time, even when unplugged from the power outlet.
Would that be solenoid issue?
the unit run fine for last season so the wiring is fine.

Any ideas would be greatly appreciated.

Not sure how much this will help you, but here is a link in pdf format to the Installation Manual, if you don't have one http://www.honeywellcentral.com/ssi/pdf/honeywell-commercial/HE220-Installation.pdf

If all else fails here is a number for Honeywell. Ask for Technical Support. (877) 841-2840

Hello, this could be tw o different things. when you install a humidifier you need a means of turning it on and off with the furnaces blower motor, this is done by either a sail switch, current sensing relay, or by the transformer being hooked up directly to the furnaces control board. if you do not have one of those three than the humidifier will run continuously untill u manually turn it off at the humidistat. If you have one of those three installed already than the solenoid valve is stuck and must be replaced.

Hello, In order for the humidifier to turn on and off you need either a sail switch or current sensing relay. A sail switch senses air flow and will turn on the humidifier when the blower motor kicks on and a current sensing relay senses current through the blower motors common wire. If you have either of theses hooked up already and the solenoid valve remains open then the solenoid valve must be replaced.

Check solenoid 24V. You should here a "click" when you turn on the unit when furnace is running. These things clog up with chemicals.

these are flow thru models and a lot of water passes thru them. The instructions say to not limit the water by closing valve at all!

The humidifier is designed to "pull" the air through the water panel. After it does the humidified air will re-enter the plenum on the side of the opening that it is pulling in from. Just keep the water panel replaced every year and you will be fine.

Check for 24volts at the valve. Some techs install these so it only comes on when the furnace calls for heat. It should have its own transformer.

Sounds like you Connected the humid trans fromer directly to a main power source. It should be either on the EAC or HUM term on the board of the furnace.

trying to find wiring instructions for honeywell he220a1019 whole house humidifier.