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Burnam Mega Steam won't shut off

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Big Ed_4
Big Ed_4 Member Posts: 2,785
in THE MAIN WALL
.....wire at the boiler and see if it stops. If not check the aquastat wiring and aquastat. If it stops check the thermostat , connections and thermo wire. See if it were stapled. Using the wrong staples cuts into the wire and could hold a circurt in. Use a meter ....Process of ilimiation is it way to find a problem if you scrach your head.

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  • Billy_11
    Billy_11 Member Posts: 13
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    Ok, I finished my install of the burnham mega steam - I will post pics soon - here is my immediate problem...
    The boiler initially listens to the thermostat but then does what it wants. Example; I turn down the temp or even turn off the heat from the thermostat, the burner shuts down...then, after 1/2 hour or so switches back on. Is there a setting on the aquastat that is telling the boiler to maintain a specific internal temp? Wrong wiring on the thermostat? I don't know.
    Here are my details:
    Burnham Mega Steam, oil, auto water feed, Hydrolevel CG450, L4006A aquastat (215°-10°), HW VisionPro 8000 thermostat.
    Other than that the boiler works like a charm. Steam in 6 minutes, steam to rads in 10-25 minutes. I will do a seperate post with the details and photos. I'm just trying to get this problem solved first.
    Thank you.
  • Charlie from wmass
    Charlie from wmass Member Posts: 4,322
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    Check for micro switches on the t stat. I am not familiar with the one you used but the honey well digital round t stat has 3 switches that need adjusted for steam systems.
    Cost is what you spend , value is what you get.

    cell # 413-841-6726
    https://heatinghelp.com/find-a-contractor/detail/charles-garrity-plumbing-and-heating
  • Billy_11
    Billy_11 Member Posts: 13
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    Now that you mention it, I think I scanned over a specific code I need to enter or change into the thermosat for steam systems. I think by default it is set for hydronic. I will do that first then backtrack.
  • Big Ed_4
    Big Ed_4 Member Posts: 2,785
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    That would change the run cycle

    Which you need to change. But by keeping the dip switches on Hydronic would not keep the burner running past the set point.

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  • Billy_11
    Billy_11 Member Posts: 13
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    No dip switches on the VisionPro 8000. It's all digital programing. It had a specific setting for steam. This seems to have solved the problem.
    Thank you for your suggestions.
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