Ufh 50 zones !!?

[on31ll]

Anybody know of a controller able to control 5 manifolds with 10 zones on each manifold


back story is its installed in a church 5 manifolds on the wall all fed off a domestic boiler. All manifolds fed in 22mm. The church left the heating on for 3 days solid and it moved up one degree !!!!!

 

[oz-plumber]

When you say the manifolds are fed off 22mm mains, are each manifolds mains taken back to the boiler location or are they al fed off the one set of 22mm mains?

Can you not provide a simple drawing of the installation?

 

[Gray0689]

Pictures please

 

[on31ll]

I havent been back to be able to take pics. Got a rep coming out as he said he has seen this exact install before and there was actuators etc.

There are 5 manifold and theses are mounted in what look like radiator covers in the main church. 2 on the left wall and 3 on the right wall. Directly opposite.

The 22mm leaves the boiler travels 10meters to the first manifold then into the second. Then goes right around the room to connect into the 3rd then 4th then 5th.

 

[Gray0689]

That is literally unbelievable that anyone would do that

 

[on31ll]

And get paid for it ! Shocking

 

[Ermintrude]

22mm cannot even deliver that level of heat. M u p p e t s.

Going to need a re pipe.

I would be running 2" CT round with each manifold off as a VT with a WC driver on the VT.

 

[Nostrum]

2" is a bit excessive for 42kw ain't it?!

 

[Ermintrude]

Barr humbug be a nice circular hedder with plenty of thermal mass to stop boiler cycling. All boiler is doing is banging that 2" round. Flow and returns would need to be slightly apart tho......

 

[on31ll]

The rep is meeting me there at some point. See what he says. We have other stuff to sort anyway. But either way the zones are all in concrete and thats the only bit staying.