A
AndyTh
Hi all. First post - be gentle.
I have added major extension to existing house. There are two pumps each supplying a separate CH and HW zone valves. The boiler is a Worchester CDi conventional. The boiler has an overun circuit that keeps the pumps runing for 3 min after the Heating demand stops.
My problem is that when the programmer or stat stops, all the valves close while the pump keeps running for 3 mins. Pump is deadheading and there is no flow through boiler.
How should the pump be wired?
Note that there are two in fact two pumps, how would I control these separately, both for normal operation and during boiler overrun.
Appreciate any help. Cheers
Tried to insert Picture of circuit here, but rejected. How can I share a picture?
I have added major extension to existing house. There are two pumps each supplying a separate CH and HW zone valves. The boiler is a Worchester CDi conventional. The boiler has an overun circuit that keeps the pumps runing for 3 min after the Heating demand stops.
My problem is that when the programmer or stat stops, all the valves close while the pump keeps running for 3 mins. Pump is deadheading and there is no flow through boiler.
How should the pump be wired?
Note that there are two in fact two pumps, how would I control these separately, both for normal operation and during boiler overrun.
Appreciate any help. Cheers
Tried to insert Picture of circuit here, but rejected. How can I share a picture?