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New Mega Steam in old Church

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  • Ironman
    Ironman Member Posts: 7,376
    edited November 2016
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    The final step: 3 Big Mouth vents added to the 4" main. This main is 175' long (105' of 4"' and 70' of 3"): it took less than 12 minutes to vent it.

    The 2 1/2" main is 35': it took a Hoffman 75 slightly longer to vent that.



    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    Sailah
  • Jamie Hall
    Jamie Hall Member Posts: 23,357
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    If the headers of the boilers are tied together, and the wet returns, then the pressures in both boilers pretty well have to be the same, with only minor head loss differences. So the water levels will stay very close to each other. No need to get fancy.

    That's a might pretty piece of work, there, Bob!
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    Ironman
  • Ironman
    Ironman Member Posts: 7,376
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    @Sailah

    Awesome vent.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Sailah
    Sailah Member Posts: 826
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    @Ironman

    Thanks!
    Peter Owens
    SteamIQ
  • SeanBeans
    SeanBeans Member Posts: 520
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    @ironman

    This is a dream job, have you been back there this winter? I'm curious to know if you changed out the cycle guard for the hydro and what effect did it have?
  • Ironman
    Ironman Member Posts: 7,376
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    Yes, I replaced them with SafeGards. Made a big difference.

    The CycleGards are made with a few different models: 10/90 10 minutes on, 90 seconds off: 20/90; 20/60.

    The Dunkirk that we installed last month came with the 20/90 which didn't really affect that system adversely, but the MegaSteams came with the 10/90 which caused a huge problem on the church because they didn't cycle in unison and the system had very large and long mains.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    SeanBeans
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,553
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    Pretty sure if you connect two boilers together with gravity returns each boiler needs a check valve on the return.

    If a boiler fails and leaks this will prevent the other boiler loosing water immediately. Think this is ASME code

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