Brix Posted October 27, 2019 Share Posted October 27, 2019 Power is on. Zone actuators seem to be working as normal - several are open/on. Wilo SB60 bronze pump is not doing anything. Pump is less than three years old. Has been working fine until this afternoon. Thermalstore, hot water, etc.. all working ok. These pumps are about £550 - what goes wrong with them and are they serviceable? Or can anyone think of anything it might be other than the pump itself? Link to comment Share on other sites More sharing options...
PeterW Posted October 27, 2019 Share Posted October 27, 2019 No need for a bronze pump in a heating circuit Undo the centre screw cover and see if you have any water in the gland - some have a slot in the end for you to give it a twist. Or a couple of sharp taps with a hammer although if it was working and is not now, that sounds more electrical. Link to comment Share on other sites More sharing options...
PeterW Posted October 27, 2019 Share Posted October 27, 2019 if it’s knackered, swap it for one of these. £80 and keep the change... https://www.screwfix.com/p/wilo-yonos-pico-25-1-6-130-glandless-circulating-pump-230v/6153x#product_additional_details_container Link to comment Share on other sites More sharing options...
Brix Posted October 27, 2019 Author Share Posted October 27, 2019 Bronze as can't have any ferrous on the system - it corrodes the UFH pipes (Kee Triple Tube, old system, discontinued, lots of documented cases of pipes literally disintegrating). I undid the screw earlier and water came out. I thought the pump was glandless? Link to comment Share on other sites More sharing options...
ProDave Posted October 27, 2019 Share Posted October 27, 2019 Strange choice of pump for UFH. Try turning the speed adjuster switch, sometimes the contact gets dirty and just exercising the switch cleans the contacts. This would do as a replacement if that does not fix it https://www.ebay.co.uk/itm/CENTRAL-HEATING-CIRCULATING-PUMP-Wilo-Pump-1-1-2-6M-180mm-Pump/362783491642?hash=item547794c63a:g:LikAAOSwKINdqDCT Link to comment Share on other sites More sharing options...
ProDave Posted October 27, 2019 Share Posted October 27, 2019 Check carefully, I have a Wilo Yonos pump in mine. They come in lots of different versions, and one of mine has a plastic body so would fit your "non ferous" criterea 1 Link to comment Share on other sites More sharing options...
PeterW Posted October 27, 2019 Share Posted October 27, 2019 10 minutes ago, Brix said: Bronze as can't have any ferrous on the system - it corrodes the UFH pipes (Kee Triple Tube, old system, discontinued, lots of documented cases of pipes literally disintegrating). I undid the screw earlier and water came out. I thought the pump was glandless? Ok so go with a PU bodied Grundfos at £72... https://www.euroboilerparts.co.uk/pu130-5-grundfos-pump-1-12-plastic-body-replacement-for-grundfos-bronze-pump-1205-p.asp 1 Link to comment Share on other sites More sharing options...
Brix Posted October 27, 2019 Author Share Posted October 27, 2019 9 minutes ago, ProDave said: Try turning the speed adjuster switch, sometimes the contact gets dirty and just exercising the switch cleans the contacts. This would do as a replacement if that does not fix it https://www.ebay.co.uk/itm/CENTRAL-HEATING-CIRCULATING-PUMP-Wilo-Pump-1-1-2-6M-180mm-Pump/362783491642?hash=item547794c63a:g:LikAAOSwKINdqDCT Thanks. Tried the adjuster but nothing. Plastic body may be the go. Link to comment Share on other sites More sharing options...
Brix Posted October 27, 2019 Author Share Posted October 27, 2019 2 minutes ago, PeterW said: Ok so go with a PU bodied Grundfos at £72... https://www.euroboilerparts.co.uk/pu130-5-grundfos-pump-1-12-plastic-body-replacement-for-grundfos-bronze-pump-1205-p.asp Nice one. Is that same size and power etc.. (not entirely sure what is essential.) Are plastic bodies a more recent development ? - would explain why not specified in install docs in 2003. Link to comment Share on other sites More sharing options...
Brix Posted October 27, 2019 Author Share Posted October 27, 2019 I certainly will not be sad if I never have to buy another SB60 again! Link to comment Share on other sites More sharing options...
PeterW Posted October 27, 2019 Share Posted October 27, 2019 PB bodies have been around for the past couple of years. Got much cheaper too ..!! Can you get the exact model and also measure from nut to nut as they do both a 130 and a 180mm body SB60 Link to comment Share on other sites More sharing options...
Brix Posted October 27, 2019 Author Share Posted October 27, 2019 Nut to nut on mine is 180. I haven't found that info on the Grundfos. Depth 145 mm Height 180 mm Width 96 mm Weight 2.94 kg Maximum Head 6000 mm Number of Phases 1 Maximum Pressure 10 bar Maximum Flow Rate 1.5 l/s Material Bronze Colour Bronze/Green Voltage 230 V Type Domestic Made To Order N Manufacturer Model No 4035483 Brand Name Wilo Range Description Wilo-SB Link to comment Share on other sites More sharing options...
PeterW Posted October 27, 2019 Share Posted October 27, 2019 Fit an adapter then - takes 2 mins. https://www.toolstation.com/pump-adaptor/p75109 Link to comment Share on other sites More sharing options...
Brix Posted October 27, 2019 Author Share Posted October 27, 2019 Lovely - thanks for the advice. Do I need to worry about any of the other specs - e.g. flow rate, head etc.. The uppermost floor is about 2m above the pump. Servicing 8 zones. Link to comment Share on other sites More sharing options...
PeterW Posted October 27, 2019 Share Posted October 27, 2019 Nope those Grundfos units can do a 6m head comfortably. 1 Link to comment Share on other sites More sharing options...
Temp Posted October 28, 2019 Share Posted October 28, 2019 At very least I'd check it's getting electricity before thinking about replacing it. If it's really faulty I'd want to know what went wrong with it. Link to comment Share on other sites More sharing options...
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