Expansion Tank Location in Primary Secondary System?

Al Letellier_2

> I've been working on "generic" sketches to give <BR>
> out to contractors when we sell a boiler. This <BR>
> one is for a primary - secondary system with a <BR>
> boiler bypass and the air separator in the system <BR>
> loop. My question is whether the air separator <BR>
> and 'point of no pressure change' should be moved <BR>
> direct to the suction side of the system pump? <BR>
> Any thoughts and comments would be <BR>
> appreciated.<BR>
> <BR>
> Thanks,<BR>
> <BR>
> Brant Wininger Cody <BR>
> Sales & Engineering <BR>
<BR>

Dave_12

Expansion Tank Location in a Primary Secondary System?

I've been working on "generic" sketches to give out to contractors when we sell a boiler. This one is for a primary - secondary system with a boiler bypass and the air separator in the system loop. My question is whether the air separator and 'point of no pressure change' should be moved direct to the suction side of the system pump? Any thoughts and comments would be appreciated.

Thanks,

Brant Wininger
Cody Sales & Engineering

Al Letellier_2

moving the air separator

You;ve got the right idea. That's were we always put them.

DanHolohan

Yes,

I'd move the air separator and the compression tank. And I'd have the boiler's circulator pumping into the boiler because that circulator sees the common piping as its point of no pressure change.

hr

All the secondary circs

should pump away from that primary loop. I agree with Dan, switch that boiler pump to flow into the boiler "pumping away" from the loop and expansion tank.

Most low mass and condensing boilers prefer you pump into them, a good habit to get into for this reason and P/S piping.

Nice drawings.

hot rod

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