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I've got this fan to install as part of a heat transfer system. The fan is controlled by a touch-screen thermostat/control unit and has three speeds.

I understand the supplied wiring diagram, but I'm wondering how best to implement it.

Should I find 4-conductor cable and join the neutral back by the control unit, or run a separate wire for the neutral?

So basically, whats the best way to physically run the wires?

Thanks

supplied diagram

my idea

1 Answer 1

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Since you are running the wires back to the control unit anyway - I would run 4 wires back to the unit and connect them all including the ground in that location.

This should prevent any issue with ground loops.

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  • Thanks for that. I've updated my post with my idea how to do it. Will this do suffice?
    – Kokako
    Jan 16, 2018 at 1:26
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    None of the conductors diagrammed indicate "ground" anywhere. Your fan should have its own grounding connection, assuming it has any exposed metal parts.
    – Upnorth
    Jan 16, 2018 at 6:22
  • @Kokako - you should ground it as well - generally your circulation fan in the air handler is attached to the Air Handler unit and therefore it is grounded to the unit - which is most likely grounded with a grounding wire from the main power panel - run the additional ground wire to your fan. Electrical wire labeling leaves much to be desired. The dash_number indicates insulated conductors - something like 10-4 or 12-4 with ground (5 wires) you need to have a ground for that fan. If the neutral opens you have a high risk of electrocution.
    – Ken
    Jan 16, 2018 at 10:23
  • Sorry guys but I misspoke when I used the word "ground" I meant "natural" the fan is double insulated so no ground is needed. How does my wiring plan look to you now?
    – Kokako
    Jan 16, 2018 at 20:59

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