Hot water boiler installation

Discussion in 'Boiler Forum' started by bobscott, Feb 28, 2011.

  1. bobscott

    bobscott New Member

    Messages:
    3
    Location:
    New York
    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. tk03

    tk03 New Member

    Messages:
    56
    Location:
    Harrisburg, pa
    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. bobscott

    bobscott New Member

    Messages:
    3
    Location:
    New York
    These are Lars copper core boilers. We were not planning on using tanks with a coil.
  4. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,227
    Location:
    Maine
    bob, I would probably stage fire the boilers and run the water tanks in paralell
  5. bobscott

    bobscott New Member

    Messages:
    3
    Location:
    New York
    What does it mean to stage fire the boilers?
    Thank you.
  6. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,227
    Location:
    Maine
    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. tk03

    tk03 New Member

    Messages:
    56
    Location:
    Harrisburg, pa
    I would agree with Tom about stage firing. I would probably pipe them as reverse return to balance the flow between the tanks.
  8. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,227
    Location:
    Maine
    Post a diagram of that reverse return for the tanks. I wann see that one LOL

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