I just replaced an old Aprilaire with a new 600 model. I wired up all the previous wires to the corresponding spots on the new controller, but there are still open spots and when I turned power back on, the Aprilaire controller screen turned on, but it isn’t triggering the water when I turn on the test. Also the controller doesn’t say that the humidifier is on. I had the furnace running when testing.
Attached are the images of the new controller with the attached wires. You’ll see the extra wires that are wrapped around the white sheathing which is coming from the furnace. These weren’t connected to the last Aprilaire and I suspect need to be connected. Appreciate any direction.
Furnace wiring info: There are two small wires coming in. The yellow and white wires go to a “Y”. Another white one goes to a W-1. A red one goes to “R”. Green wire goes to green.
Another white wire coming in goes to the Y and the red goes to C.