My Wilo Gold pump gave up after a commendable 15 years service and I've installed a Grundfos Alpha 2L 15/50 yesterday afternoon.
The pump services a pressurised heating system within a four bedroomed two story house ( 12 radiators). I've bled the system through and checked that both the hot water and central heating motorised valves are operational. However the radiators seem to take an age to heat up and the hot water is luke warm.
I've left the pump operating in mode III and the majority of the time the discharge pipe work is roasting with the return to the boiler luke warm and the boiler seldom kicking in.
Occasionally there will be a rush in flow (audible throughout the house) and the boiler will kick in resulting in the return leg to the boiler heating up. Then the whole cycle starts over again..
Im beginning to think that the pump isnt big enough and that it's dead heading.
Any guidance would be much appreciated
Thanks
Ian
(Frustrated DIY Man)
The pump services a pressurised heating system within a four bedroomed two story house ( 12 radiators). I've bled the system through and checked that both the hot water and central heating motorised valves are operational. However the radiators seem to take an age to heat up and the hot water is luke warm.
I've left the pump operating in mode III and the majority of the time the discharge pipe work is roasting with the return to the boiler luke warm and the boiler seldom kicking in.
Occasionally there will be a rush in flow (audible throughout the house) and the boiler will kick in resulting in the return leg to the boiler heating up. Then the whole cycle starts over again..
Im beginning to think that the pump isnt big enough and that it's dead heading.
Any guidance would be much appreciated
Thanks
Ian
(Frustrated DIY Man)