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Baffled: Weil-Mclain startup and delay on break relay

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  • 109A_5
    109A_5 Member Posts: 3,259
    edited November 12
    https://forum.heatinghelp.com/discussion/comment/1871903#Comment_1871903

    I wish I could take credit for it but it was basically @EBEBRATT-Ed idea. It seems to solve the apparent changing load characteristic of the damper. I just integrated it into the Ladder Wiring Diagram for the boiler.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 11,453

    @109A_5 … That sounds like @ ED. He really likes those RIB relays. Nice Diagram.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 19,172

    I do like RIBs. esp. the RIBU1C

    The idiot light. NO or NC, 120 or 10-30 volt ACor DC coil. $16

    Very handy.

  • anjgc
    anjgc Member Posts: 21
    https://forum.heatinghelp.com/discussion/comment/1871984#Comment_1871984

    This was my first introduction to this unit. One of those objects you get your hands on and immediately fall in love. Bought myself a spare because I absolutely know I’m going to have a use for it sooner or later.

    EBEBRATT-Ed
  • anjgc
    anjgc Member Posts: 21
    edited November 12
    https://forum.heatinghelp.com/discussion/comment/1871366#Comment_1871366
    boiler wiring 2.png

    One note - I've got the '3' and '1' terminals connected as shown here; this seemed to me to be the right way to do it based on my understanding of the 32392/ICM203. (I.e., in this diagram we'd be "looking at the timer from behind.")

    I haven't tested to see if it makes a difference in this setup, but apparently it might in some applications…

    Anyway, I post this because I will update the OP on this thread with the solution for future searchers and wanted to be sure we have all things accounted for.

  • 109A_5
    109A_5 Member Posts: 3,259

    Although I did see it in that YouTube video that the person in the video complained the timer was hooked up backwards (with no real demonstration and resolution in the video, I think there was other issues), I would say in this case it does not matter. IMO it does not matter which way terminals 1 and 3 are connected, for two reasons, first it is a series circuit (it's only a two wire device), also it is an AC series circuit. Secondly (at least with the ICM203F) the terminals 1 and 3 immediately goes through a bridge rectifier circuit inside the timer and it does not care either way about terminals 1 and 3.

    Your connection details may be helpful to others if they have never worked with relays and/or this type of timer before.

    Thanks.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
    anjgc

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