Multiple boiler piping

gpjazz · August 30

Few questions in regards to multiple boiler piping..

1st is about system circulator.. I included a quick drawing with 2 options for circulator location. Can anyone suggest the proper (or better) location for the system circulator ??

And this job is gonna have 3 boilers installed, obviously each with it's own circulator…

So question 2, is there a preference as to which side of the boiler each boiler circulator should be ? On supply or return of boiler?

And 3rd, does each individual boiler need a check valve in the piping ? Again, is it preferred on supply or return of boiler?

Thanks for any advice.

boiler piping sketch.pdf

hot_rod · August 30

What type of boiler?

What type of distribution?

With conventional CI boilers, pumps could be on either Sor R

With high pressure drop mod cons, pump into the turn.

A hydraulic separator make for a nice installation, giving you air, dirt, mag, and hydraulic separation.

If it is a high mass distribution, CI boiled may need return protection.

EBEBRATT-Ed · August 30

Option 2 I like better regardless of the boiler as far as the system circ goes.

As far as the boiler(s) circulators I would put them on the return if it is a mod con with a high pressure drop. CI boilers it probably doesn't matter.

gpjazz · August 31

They will be cast iron boilers

hot_rod · August 31

The expansion on the inlet side of the boiler and system pump.

Air purger at supply from boilers

Multiple boiler piping

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