No zone heat! Help!

DIYsparky

so.. first off I’m an electrician.. bought a house doing it all myself ripped out the boiler and replaced it..with Weil McClain eco tec 150,000 followed manufacturer schematic for piping and installation, the boiler fires up with the call from the thermostat.. heats up, but the circulator pumps do not pull heat up through the zone although they are running, suggestions!? I have purged the system and right now I have 3/4 zones closes just trying to get at least one goi

ng!

EBEBRATT-Ed

most likely air is trapped in the system

mattmia2

I assume the valves in the return that are closed in the picture are actually open. is the boiler pump running? Is the boiler loop hot?

mattmia2

We have seen a few people here where their mod con has a strainer in it that they have managed to plug up.

mattmia2

You don't have a circulator for the boiler loop. You either need to connect the boiler at the corner where the supply and return come together or add a circulator to the loop where the boiler connects. The boiler circulator will move water between the 2 tees connected to the boiler but there is nothing to move water through the loop that the tees are connected to.

Or close off the bypass between the supply and return manifolds

mattmia2

But it looks pretty and is pretty close for a first attempt.

hot_rod

looks like you have multiple primary loops one without a circ? I can’t see the piping left of the air scoop well enough

HVACNUT

WM gave you the Low Loss Header, but you installed an additional one. Remove yours. The boiler circulator is just pumping to your LL header, and back to the boiler. It's not going to the zone loops.

Not sure about the manifold sizes, either. Looks reduced.

Zman

You have primary/secondary on top of primary/secondary and the water between the boiler and the zones cannot move. If you put a closed valve or 2 caps on the "X", life will be good.

Is that an outdoor sensor strapped to the pipe in the bottom right? I've never seen that before. does it read true?

HomerJSmith

Ya, your piping is unconventional. I think you have a possibility for a significant pressure loss. The common pipe for the primary loop (that's the one with the EX tank) should be generously sized. It looks to be 3/4". It should be no less than 1" and I would do it in 1 1/4" Too many press fittings. I would have done this with a hydro-sep which would have simplified things. Check valves on the zone returns would prevent ghost flows and you definitely need them on the pump volutes, but I do see them (ProPress). You have two closely spaced tees and you only needed one and none if you had a hydro-sep. You had one (closely spaced tees) on the boiler and one on the primary loop. I can't see if you are doing an indirect tank (DHW).

You don't have the Pro Press check valve install backward or one in the volute ,too? I do see an IFC label.

Wired correctly, fuses good?

mattmia2

https://forum.heatinghelp.com/discussion/comment/1810003#Comment_1810003

there is one on what is supposed to bet the return too so i think they are remote swt and rwt sensors.