Aprilaire 550 watervalve not shutting off with furnace

My unit is 10 years old in the house i moved into. i cleaned out my watervalve, replaced my water valve, and now i do get water filling my humidfier when i turn up the humidistat. the problem is the water does not shut off with the furnace. Furnace is a York Diamond 90 model is: P3URC16 NO7501E. 120v is supplied off the furnace on/off switch to a 24v transformer. This goes tothe water valve and the humidistat. Nothing goes tothe furnace cirquit board at all. I am guessing the previous owners used this in the past. Is this system a Manual system where you need to turn on/off the switch? There is a switch mounted on the transmformer junction box foe winter or summer. Switching this turns on/off the power to the water valve/humidistat. Thanks for whatever help you can offer.

 

Did you look at the control board.......you should have a HUM or EAC terminal on it.
If you do.....then you can connect your 24 vac transformer there that is for the humidifier.

 

thanks, i do have both hum and eac connections at the circuit board. do i crimp on a spade connector on normal copper wiring, or use a heavy guage stranded wire to run to my transformer?
Any idea why the original owner wouldn't have run this to the furnace originally? I think they just left the water running all the time.

thanks for the help!

Kevin

 

Ran new wire to the 24vac ant everything works as it shoud now!

Thanks