1st time on here so hi to everyone. I'm an electrician who on a recent contract had to design and install a bespoke control system for zoned central heating and hot water. Upon comisioning my bit of the system it became apparent that all was not well with the water side of the system. Layout is as follows:- 103 ish K BTU system boiler with own pump feeding 22mm primarys to the airing cupboard, total length (flow & return) 30M, head 2.5M. In the A/C is a 210L pressurised tank with a 22mm union boost pump feeding 4 x 2 port 22mm valves.
Valve 1 tank estimate 12 K BTU
Valve 2 upstairs rads 33 K BTU
Valve 3 Downstairs rads 15 K BTU
Valve 4 Under floor heat 8 K BTU
Total 68 K BTU
The problem is that with valves 2,3 & 4 open we are struggling for heat at all the rads (UFH set ok) and balancing is a nightmare. Call for hot water and the rads cool(restriction set for tank flow).
I suggest that 28mm primaries are needed from the boiler split through a 28mm manifold to feed the two port valves but opinion seems divided with other plumbers hence this post to see if anyone would like to comment.
If you are wondering why im involved the original plumber has been kicked of site for other reasons and I don't want to abandon the 70 year old + clients.
Thanks
Valve 1 tank estimate 12 K BTU
Valve 2 upstairs rads 33 K BTU
Valve 3 Downstairs rads 15 K BTU
Valve 4 Under floor heat 8 K BTU
Total 68 K BTU
The problem is that with valves 2,3 & 4 open we are struggling for heat at all the rads (UFH set ok) and balancing is a nightmare. Call for hot water and the rads cool(restriction set for tank flow).
I suggest that 28mm primaries are needed from the boiler split through a 28mm manifold to feed the two port valves but opinion seems divided with other plumbers hence this post to see if anyone would like to comment.
If you are wondering why im involved the original plumber has been kicked of site for other reasons and I don't want to abandon the 70 year old + clients.
Thanks