W-plan pump run on Son recently moved into a 20 year old house with what appears to be a W-plan system using, I think a Worcester Bosch Greenstar gas boiler
He noticed that the rads were getting hot when the HW was on and I diagnosed the 2 position diverter valve (not 3 position valve!) was well and truly seized in the open position.
Having replaced tis expensive (£150) item HW now gets hot and the rads dont......until the cylinder thermostat temp is reached and the valve moves to the CH position which all seems correct.....but the pump continues to run for several minutes as I believe it should during which time it is now pumping the residual heat around the rads !
Cant see any way around that apart from changing to a mid position valve and Y-plan which, having just fitted a new one I dont really want to do as it may well involve additional wiring as well as wasted ££££
Is that simply a disadvantage of the W-plan system that we have to live with ???? seems rather daft if it is
W-plan pump run on to read more on the original thread at Plumbing Advice
See also UK Plumbing Advice for all UK plumbing advice needs.
He noticed that the rads were getting hot when the HW was on and I diagnosed the 2 position diverter valve (not 3 position valve!) was well and truly seized in the open position.
Having replaced tis expensive (£150) item HW now gets hot and the rads dont......until the cylinder thermostat temp is reached and the valve moves to the CH position which all seems correct.....but the pump continues to run for several minutes as I believe it should during which time it is now pumping the residual heat around the rads !
Cant see any way around that apart from changing to a mid position valve and Y-plan which, having just fitted a new one I dont really want to do as it may well involve additional wiring as well as wasted ££££
Is that simply a disadvantage of the W-plan system that we have to live with ???? seems rather daft if it is
W-plan pump run on to read more on the original thread at Plumbing Advice
See also UK Plumbing Advice for all UK plumbing advice needs.
