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Question on a 1984 Weil McLain Boiler

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LifeWhere
LifeWhere Member Posts: 2
in Strictly Steam
I'm monitoring a 1984, Weil McLain boiler. The unit turned on 40 hours ago and hasn't turned off. It turned on on 2/28 at 5:00 PM and is still running as of 3/2 at 9:00 AM. The first graph shows the unit turning on at the 20.6A capacitance spike and running for 40 hours (the timeline is 48 hours). The second graph shows a 6 hour window of time. It is running on a cycle where every 10 minutes it increases its draw by .2A (2.0A-2.2A total) every 4-5 minutes.



What should I look for to understand why it won't shut off?

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  • Jamie Hall
    Jamie Hall Member Posts: 23,313
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    What else is it doing, besides drawing 240 watts from the power line? Stand next to it and figure out what it's doing, please...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • LifeWhere
    LifeWhere Member Posts: 2
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    Jamie, we can't get onsite until this weekend. We are monitoring it remotely and working to see what we can detect before we show up.
  • JUGHNE
    JUGHNE Member Posts: 11,062
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    This being a steam boiler, could the pressure switch be cycling the gas valve? Tstat is still calling for heat. Flue damper stays open.
    Or if an old school tstat the heat anticipator is out of wack.

    With all this high tech monitoring do you know the average air temp in the building?
  • JUGHNE
    JUGHNE Member Posts: 11,062
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    Was this mystery ever solved....the weekend has passed.

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