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Thread: Integrating AprilAire 350 Humidifier into Nest 2.0 setup

  1. #1
    Junior Member

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    Integrating AprilAire 360 Humidifier into Nest 2.0 setup

    Hello Everyone,

    I currently have a Nest 2.0 installed in my 1913 home, which has a gas-powered hot water boiler system feeding cast iron radiators (for heat), and a Lenox A/C system.

    The common wire is fed from the Lenox air handler, so the Nest gets full power. The boiler is much older and runs off a simple switched relay. For reference here is my current nest setup:

    Click image for larger version. 

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    I have just acquired an AprilAire 360 which is a whole-home dehumidifier that is completely separate from both the Boiler and Central Air system. With some searching I found the threads below, however I am a bit confused as to how I should proceed in connecting the humidifier, since the first isn't quite clear and the second references humidifiers that are integrated into HVAC systems:
    http://www.thermostatforums.com/show...fier-with-nest
    http://www.thermostatforums.com/show...ight=aprilaire

    The AprilAire 360 has two yellow humidistat wires that are available, but the diagrams in the previous threads seem to indicate that other wires might be necessary. The wiring diagram for the 360 is as shown here:

    Attachment 943

    From the previous posts it sounds like I will need a 6AZU2 Fan relay, and I will need to connect the system to the * terminal on the Nest. so with that in mind, can someone help me out with a diagram showing which wires need to be connected where to properly integrate the AprilAire 360 into my system?

    Thanks so much for your help!
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Last edited by Maxwell Smart; 11-19-2014 at 06:13 AM.

  2. #2
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    Click image for larger version. 

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  3. #3
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    Thanks for your response. Just to verify, is this the proper way I should attach the wires?

    < Wrong Diagram >
    Last edited by Maxwell Smart; 11-19-2014 at 06:13 AM.

  4. #4
    Administrator

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    The wires from the Nest thermostat need to connect to the coil of the relay. You have shown the wires from the Nest connected to the contacts of the relay which is not correct.

  5. #5
    Junior Member

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    Ah, got it, so like this then, thanks!

    Wiring for connecting a Nest thermostat to a April Aire humidifier model 350/360

  6. #6
    Administrator

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    Correct

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