Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

845A hooked to L8124A

nick z.
nick z. Member Posts: 157
in THE MAIN WALL
Does the power from 845 go to ZC or ZR? I always forget.

Comments

  • Rudy
    Rudy Member Posts: 482
    if you

    want the 845 to power the 8124/burner only, use ZR. ZC is your reverse acting.
  • nick z.
    nick z. Member Posts: 157


    Thanks!
  • Firedragon_4
    Firedragon_4 Member Posts: 1,436
    In addition I teach and

    remember this:
    ZC goes to the Zone Controls

    ZR is the Zone Return

    Not scientific but it works for me!
  • Rudy
    Rudy Member Posts: 482
    I relate

    it to "the r factor". I wire power to 3. 4 (four-"r" goes to ZR ("r"). Relay closes, power goes to 4, then to ZR!
This discussion has been closed.

Categories