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Old 02-21-2014, 07:25 PM   #1
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Aprilaire 600m to Trane XR95


I have no idea on how to wire a Aprilaire 600m to a Trane XR 95 furnace, in the box contains confusing instructions, a humidistat and a transformer. I need to know what wire needs to go where. On the humidifier there are two wires, two screw posts on the humidistat and thats where im lost. I dont know if the furnace can power the humidifier and im unclear whether or not to have the humidifier run on the fan or when heat is called. Im basically confused and the more i stare at the furnace and instructions im lost. Help
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Old 02-22-2014, 08:10 AM   #2
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Aprilaire 600m to Trane XR95


Transformer line voltage wires gets wired to the furnace boards, HUM terminal and neutral. Run a pair of wires from the humidistat to the humidifier, and another pair from the transformer to the humidifier.

Connect one wire from the transformer to one wire from the humidistat. Connect the other wire from the humidistat to the humidifier, connect the remaining wire from the transformer to the humidifier.

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Old 02-22-2014, 10:03 AM   #3
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Aprilaire 600m to Trane XR95


I have no idea what the HUM terminal is or where to find it. I see the board and only terminals i see are C, G, R, WY, TWN, these are screw terminals.
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Old 02-22-2014, 10:07 AM   #4
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Aprilaire 600m to Trane XR95


Look at the board closer. You should see a male spade terminal that is marked HUM. Should be near the terminals whee the blower motor is connected.
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Old 02-22-2014, 10:26 AM   #5
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Aprilaire 600m to Trane XR95


Yup, finally found it, it helps to know what your looking for instead of blindly looking. The HUM+ has a wire plugged into it and the HUM- is open, how do i go about adding the wire to the HUM+?

You have been a really big help!!!
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Old 02-22-2014, 11:48 AM   #6
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Aprilaire 600m to Trane XR95


What does the HUM+ wire go to. You can always cut that wire, strip it, and then add the wire from the humidifier transformer and wire nut them together.
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Old 02-22-2014, 07:13 PM   #7
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Aprilaire 600m to Trane XR95


That wire leads to the junction box where the power comes in and is capped off at the end. I have become lost again . Do I need two sets of two wire cable or just one? Right now the unit is installed except wiring, does one wire need a break and attached to humidistat like a wall switch or do i have this all wrong?
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Old 02-22-2014, 08:00 PM   #8
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Needs a break and to be atched to humidistat. like I posted in the post before you said you couldn't find the HUM terminal.
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Old 02-23-2014, 04:35 PM   #9
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Aprilaire 600m to Trane XR95


Is there a way for the humidifier to run when only the fan is running? Not just when heating.

Other than that its all up and running
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Old 02-23-2014, 05:28 PM   #10
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If you connect it to the EAC terminal on the furnace board.

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