I have a problem with a new installed UFH system as follows.
One 46kW oil boiler heating two number 12 port manifolds plus DHW and rads and I am having difficulty controlling the TMV on both manifolds.
Having set both manifold mixing valves to around 45* the TMVs don't hold that temp.they both increase in value up to 55/60*
The floor temp probes are turning off the room stat. (protecting wood and tiled floor)
The fact this is on two seperate manifolds suggests the fault is not with an individual TMV
The common denominator is the boiler? or is there something else I have missed
Thanks
Paul C
One 46kW oil boiler heating two number 12 port manifolds plus DHW and rads and I am having difficulty controlling the TMV on both manifolds.
Having set both manifold mixing valves to around 45* the TMVs don't hold that temp.they both increase in value up to 55/60*
The floor temp probes are turning off the room stat. (protecting wood and tiled floor)
The fact this is on two seperate manifolds suggests the fault is not with an individual TMV
The common denominator is the boiler? or is there something else I have missed
Thanks
Paul C