pex manifold locations

[gogolf0401]

Hi Guys,
So I have a 40x88' pole barn that I will be adding radiant heat to. I would like to have 3 zones. 1 zone for a game room and bathroom, 1 zone for wood shop, and 1 zone for the rest which will be storage and mechanics shop.

I'm looking for ideas on where to locate the manifold(s) and what the pump setup should be.

Blue Ridge Company sold me 3 manifolds, 1 for each zone. I've always seen manifolds pretty close together along with the boiler and pump right there. I am unsure how to do it with multiple zones though. I still assume the manifolds need to be close to each other, but how do you do that if you can only use the outside walls (interior walls won't be up till after concrete) to mount the manifolds prior to pour?

Blue Ridge also said I would need 3 pumps, 1 for each zone. I always thought I could just use 1 pump, 1 boiler and use shutoff valves to control which zones get heat.

If any of you have had a similar situation I would be grateful to hear what you guys did. See my floorplan attached.

Thanks!

 

[rburke65]

Only one zone here but you might consider locating the close to your utilities...Walter supply, electric, N. gas, etc.

 

[gogolf0401]

Has anyone brought their pex up out of the concrete to where they were planning to have an interior wall put up? If so, how did you suspend the pex during the concrete pour? Did you hang your manifold from the ceiling or something so you could pressure test before and during the pour?

Given my layout, it would seem best if my mechanicals were installed on the interior walls, that way the 3 manifolds (1 for each zone) can be located relatively close together.

Thoughts?

 

[50cal]

Use a couple 2x4s and a sheet of plywood to suspend from the floor joists.

 

[blackfly]

See photo

 

[gogolf0401]

Use a couple 2x4s and a sheet of plywood to suspend from the floor joists.

I don't have floor joists to attach to.. this is a slab on grade.

 

[gogolf0401]

See photo

This pic appears to show a setup against an outside wall. I need to know how people do it on an interior wall location that is not there yet until after the concrete is poured/cured.

Is this simply not an option? Has no one ever done this?

 

[dfiler2]

I've seen it done, there is a strip of concrete left out, say 12" x 48" the tubing is held up by a couple of posts. Then after the rest is poured the forms are torn out and that area gets poured.

 

[jlckmj]

I used a 2x6 and drilled the holes for the pex, then pushed it down close to where the finished concrete would be and drove 1 1/2 inch angle into the ground to hold it in position. 2x6 is still there, they hand troweled under it to finish.

Jim

 

[rburke65]

You could do 2 pieces of rebar or angle and a 2x between to support the pex.

 

[akpolaris]

I placed 2 vertical pieces of rebar and tied 2 horizontal pieces between them. 1 right a the slab and the other about 24' up. Tied the pex to each horizontal piece paired up so I could easily identify the loops.