Aprilaire 760 humidifier wiring into a durozone circuit board
I need help with the wiring for my aprilaire 760. I have a durozone smz circuit board and I feel that the humidifier should be wired into it, because the way it is currently wired is causing the humidifier to run all the time.
I'm not a HVAC tech, but your humidifier's instructions show it wired to the furnaces blower motor. Over the years I've infaced a lot of weird things and suspect the interface you want would be a total kludge., if it's even possible.
Suggest you listen to the people that designed it.
Has it ever worked correctly ?
Was something changed ?
Do you have a manual two wire humidistat inline ?
First you must confirm if your humidifier requires contact closure or 24v to operate.
Locate the two wires coming out of the humidifier.
Disconnect them from the wiring and short them together.
Does the humidifier start ?
If it does.... you require a relay in the circuit.
If it doesn't.... you can connect directly to the zoning board.
I'll have to check and see if shorting the wires triggers the solenoid. I know everything was working years ago, but the previous owner was a cheap skate engineer that never maintained anything. When the dual zone solenoids failed he just had them removed and not replaced. He also had the humidifier disconnected at that time because he didn't want to pay for a new filter/service kit. It's a freedom 90 furnace and I'm honestly just fed up at this point and ready to call a pro.
I believe it's a manual controlled unit. The control panel is located upstairs and it does have 2 wires that come down through the floor along with all the wires from the thermostat. Thermostat and humidifier have separate control panels.
Ok... in the first picture we see the solenoid with yellow wires and then two brown wires connected to thermostat cable. You shorted the two brown wires and got no response..... correct ?
I'll assume that is a yes.
In the second of the new pictures is the control/ignition box.
There is a black wire in the HUM position.
Trace that... it should go to the transformer you've shown us.
If you have a meter..... check that transformer on the metal box.
It should be putting out 24vAC when the furnace is firing.
This is your set up. Fairly easy to follow.
If the transformer is working.... we'll check the h'stat next.
The diagram that you provided is the same way that it currently wired and it causes the humidifier to run continuously. My understanding is that it should only kick on when heat is called for and the blower/fan is running. That's why I believe it needs to be incorporated into the durozone circuit board or the board that is located on the furnace.
I have a Stealth Cam, LLC model: STC-PX18CMO
This thing is probably 6 - 8 years old. Its been a decent game camera. Stays out year round.
Yesterday, we went out & got the cards out of all 5 cams.
This one had pictures on it but the date/time wasn't right so I don't know when it quit working & I've already deleted the pictures.
I put the card back in & turned it on, but nothing happened. I knew the batteries shouldn't be a problem but I checked. It takes 8 AA 1.5v batteries. They all had 1.47v. IMHO, that's still good. I put them all back in & wiggled them around & still nothing.
I don't really know how to check the total voltage here so, I just touched hot on the first inline battery & ground on the last battery..... still 1.47 volts.
So... are the batteries bad at 1.47? I say no. What do you say? (No I didn't change them out)
OR.......... Hammer Time for the cam??
Moving the dryer to the main floor from basement, the cable run will be approx. 20 to 30ft.
What gauge of wire needed for this?
I know the standard is 10gauge but that only goes from the plug to the dryer, 3 or 4ft.
Thanks
01-31-23, 11:14 PM
