How To Wire Aprilaire 700 Humidifier
On 2/10/2016 8:41 PM, wrote: need to add a 24 volt transformer to control board to operate aprilaire humidifier wtith my Trane furnace. The problem is that I only have two terminals on the control board that are available. One is hum-n and the other is eac-n. How do I get 110 volts to power the transformer? I thought that I would be able to use the hum connection or eac connection and then one neutral connection, but there are no neutral connections available on the control board.
How To Wire Aprilaire 700 Humidifier
Might have to splice and wire nut some of the neutrals. Christopher A. Young learn more about Jesus. Tony Hwang 09:37. Wrote: need to add a 24 volt transformer to control board to operate aprilaire humidifier wtith my Trane furnace.
Aprilaire Humidifier 800
The problem is that I only have two terminals on the control board that are available. One is hum-n and the other is eac-n. How do I get 110 volts to power the transformer? I thought that I would be able to use the hum connection or eac connection and then one neutral connection, but there are no neutral connections available on the control board. Idea is humidifier should come on when fan comes on. Hum terminal is the one to connect.
EAC is for electronic air cleaner. I think both out puts are same. I connected accordingly since we have Aprilaire 600 and Honeywell EAC wired in. Just doulbe check the voltages on yours. On Wednesday, February 10, 2016 at 8:41:12 PM UTC-5, wrote: need to add a 24 volt transformer to control board to operate aprilaire humidifier wtith my Trane furnace. The problem is that I only have two terminals on the control board that are available.
One is hum-n and the other is eac-n. How do I get 110 volts to power the transformer? I thought that I would be able to use the hum connection or eac connection and then one neutral connection, but there are no neutral connections available on the control board. Attach the wires that you would have attached to the 24 volts side of the transformer to the hum terminals. It doesn't matter which one goes where. Two wires, two terminals. Or it may be one terminal.
In that case, one wire goes to hum (24v hot) and the other wire to C (24v common)Throw the transformer away. You only need 24 volts to operate your humidifier. The hum terminal provides 24 volts to the humidifier water solenoid on a call for heat and the humidistat opens or closes, operating the water solenoid according to the set point.
I replaced an old Aprilaire whole-house humidifier with a new model 700. I have the unit connected and secure to the duct. I removed the old control panel and sealed up the opening. I mounted the new control panel.
Now, I had everything wired up according to the instructions. I had one brown wire coming from the unit going to the transformer and the other brown wire going to an 'H' spot on the control panel.
Then a wire going from the other 'H' spot on the control panel to the other terminal on the transformer. That's how the instructions said to do it except I wasn't getting any power to the control panel. So, I re-wired according to some diagrams I found online. I now have both wires from the unit going to the 'H' spots on the control panel. Two wires going from the transformer to the 'R' and 'C' spots on the control panel.
Now I have power to the control panel, but the solenoid won't click open and the blower won't start. R/C on the humidifier board go to R/C on furnace/air handler. ODT goes to your outdoor sensor W on the humidifier board goes to W on your furnace/air handler. G from the thermostat gets disconnected from your furnace/air handler and goes through to G on the humidifier control board.
One wire from H goes to the 24v hot side of your tranformer. The other wire on the tranformer gets connected to one side of your solenoid and the other side of the solenoid goes back to the other H terminal on the humidifier control board.
Aprilaire 700 Humidifier Manual
Gf on the humidifier panel goes back to G on the furnace/air handler. If any of this sounds too confusing I would call a tech out edit: you will be doubling up wires on the furnace control panel, example: you should have two wires connected to your W terminal, one from the thermostat and one going to the humidifier control panel, same thing with R and possibly C. R wire from thermostat will connect to R on furnace control panel and another will go to the humidifier control panel. So don't remove wires from the furnace control board thinking they go to the humidifer and vice versa. The only wire that gets removed from the furnace board is G which then comes back to the furnace on Gf. Don't blow a transformer or hurt yourself.