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Thread: Hot water boiler installation

  1. #1
    DIY Junior Member bobscott's Avatar
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    Default Hot water boiler installation

    We are looking to install two 250,000 btu boilers and two 110 gallon holding tanks to provide hot water to a 40 unit apartment building. What would be the best way to install them to get the most redundancy and efficiency? (each feed tank individually, then join them after the tanks, in sequence, etc?)
    Thanks.

  2. #2
    DIY Member tk03's Avatar
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    Are these mod/cons or cast iron boilers. Use indirect water heaters for the hot water. Whose tanks are you using?
    Piping will depend on boilers

  3. #3
    DIY Junior Member bobscott's Avatar
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    These are Lars copper core boilers. We were not planning on using tanks with a coil.

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    In the Trades Tom Sawyer's Avatar
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    bob, I would probably stage fire the boilers and run the water tanks in paralell

  5. #5
    DIY Junior Member bobscott's Avatar
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    What does it mean to stage fire the boilers?
    Thank you.

  6. #6
    In the Trades Tom Sawyer's Avatar
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    They fire to demand. On low demand a single boiler fires, as demand increases the 2nd boiler cuts in. Re-set modulating controls would be a very good addition also.

  7. #7
    DIY Member tk03's Avatar
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    I would agree with Tom about stage firing. I would probably pipe them as reverse return to balance the flow between the tanks.

  8. #8
    In the Trades Tom Sawyer's Avatar
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    Post a diagram of that reverse return for the tanks. I wann see that one LOL

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