Manifold Pump

Alex13

I wanted to do a simple maneuver... radiator valves call for heat, manifold pump on.... valves closed, pump off.... My problem is that the wired thermostat doesn't turn the pump on/off at the same time as the demand. ..
When the valves close, the pump continues to work, not working synchronized

policywonk

Is there a dedicated wiring centre for that manifold? Is the manifold pump wired into that?

Normally a UFH manifold wiring centre has a dedicated wiring centre, which translates the relationship between thermostats calling for heat, and valves opening and shutting. It fires the manifold pump when at least one stat calls for heat and shuts it down when all calls have stopped.

Usually there is a pressure differential pump which throttles back when the manifold's pressure stat has decided the flow temperature needs to come down - and that can bring the pump to a crawl, even though all the stats are calling for heat but they are close to hitting their target temp. When the valves are fully open the pump has its foot down and belts heat through the loops as fast as the manifold's pressure stat will allow.

Please clarify the wiring.