Hot water boiler installation

BobScott · Feb 28, 2011

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.

Tk03 · Feb 28, 2011

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

Sponsor · 2022-01-29T12:20:58-0800

BobScott · Feb 28, 2011

These are Lars copper core boilers. We were not planning on using tanks with a coil.

Tom Sawyer · Feb 28, 2011

bob, I would probably stage fire the boilers and run the water tanks in paralell

BobScott · Feb 28, 2011

What does it mean to stage fire the boilers?
Thank you.

Tom Sawyer · Feb 28, 2011

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.

Tk03 · Feb 28, 2011

I would agree with Tom about stage firing. I would probably pipe them as reverse return to balance the flow between the tanks.

Tom Sawyer · Mar 1, 2011

Post a diagram of that reverse return for the tanks. I wann see that one LOL

Hot water boiler installation

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