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Thread: wiring furnace transformer Q.

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  1. #1
    DIY Junior Member thebunrman's Avatar
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    Default wiring furnace transformer Q.

    Hi all, I am trying to install a new transformer on my furnace and well the new transformer does not have the labels my old one did, COM , COM , 120v, 24v. Here is a picture of the transformer it only shows LOAD, LINE but doesn't specify which lead is exactly what.

    Also I have attached a second picture of my old transformer.

    Thanks for any help.




    Last edited by thebunrman; 10-26-2012 at 12:39 PM.

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Line is the 120vac, load is the 24vac. It often doesn't matter which lead goes where as long as you match the leads to the line (120vac) to the line and the load to the load.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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