It can't be right!

KABOOM

Hello,
Interesting place you have here!

I did a drawing after doing a little research, but I am not sure I have it correct and I know I am missing where the shut off valves, unions, gauges, etc...go.

I am needing to use (hoping to use) circulators in the Grudfos Alpha or some other variation B&G or Taco ECM's because the studio runs off battery power (and generator to keep the batteries topped up) so if we can keep the power use down, this would be great.
What are the chances I can use these pumps on this boiler and floor?

Here are the specifics.

Studio/office
Slab on grade
One zone
4 loops
each loop is 230' (+/-)
The boiler is an Allied Boiler (Super Hot) Mini Gas-50 http://alliedboilers.com/wp-content/ProductDocuments/MG/MG Installation & Service Manual (S9361A).pdf

Thanks for any additions!

Is this a reasonable start?

STEVEusaPA

i think one of these designs would be better

KABOOM

Good Morning Steve,
Thanks for that.

I am having the non o2 pex issue, so isolation is a must. Or at least this is the impression I get. Though I have had others tell me it is is overblown as an issue. Though I tend to lean to the side of better to be safe than blown up.

Ironman

What's gonna control the SWT to the slab?

Zman

The cast iron boilers and ecm circulators are a good choice given your energy restraints.

You might consider using a taco I series 3way valve on the other (radiant) side of the heat exchanger instead of the valve you have on the boiler side. Moving the valve would give you consistent flow though the boiler and provide some control "finesse" on the slab side.

You could put the return water sensor on the boiler side to prevent boiler condensation and the supply temp sensor on the radiant supply in order to get your outdoor reset control.

Rich_49

What is the design load of the Studio to be heated ?

Will you be using outdoor reset ?

What temp do you require for the radiant at design conditions ?