Radiators / changing pump


Postby ampo2128 » Tue Jan 15, 2008 1:03 pm

Hope someone can help me.... I have 2 large double rads at the front of the house (11 Rads in total) and they are struggling to warm up, after a while they get luke warm. If I turn a rad off in another part of the house the warm up considerable, yet when i open the closed rad again the heat goes. I am toying with the idea of changing the heating pump from a grudfos 15-50 to a 15-60 to help the water get around the system better.

I have a Worcester condensing boiler fitted about 2 years ago.

the hot water is find so cannot see a problem with the boiler....

If anyone has any advise it would be very helpful
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Postby htg engineer » Tue Jan 15, 2008 6:23 pm

is the pump speed set to III ? it could just be the age of the pump.
A 15-60 pump would help, 11 radiators is quite a large system.
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Postby coupedummy » Wed Jan 16, 2008 9:38 am

id say the radiators need balancing out.mens restricting the flow to the nearest radiators to enhance flow to ones futher in the system.
Google it,try that first before removing pump
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Postby ampo2128 » Wed Jan 16, 2008 9:54 am

The pump is set on III, the pump was inplace when we moved in 2 years ago, at the time of the boiler change i was told the pump was fine. I have a 3 bedroom house with a large extension on the side that has 3 rads ( 1 in the kitchen and 2 in the dining area)...
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