58 replies to this topic

[Tamworthbay]

We have a problem with our boiler, as of today we are not getting hot water and the rads don't get warm with the heating on. I have done a few checks and think its the pump. The boiler is a glow worm micron 50ff(known for PCB failures) and after a short time on comes up with a lockout code for overheating. When I checked the pump it was very hot and I could not hear or feel any movement. I let the system cool down and tried again, the pump got very hot very quickly even though the pipes leading to and from it are still Luke warm. I think this suggests that the pump has seized.

Are there any experts who can give an opinion on whether I am right or not?

[cradley-heathen]

im not an expert mate but i did plumb in my solid fuel system last year and i was an engineer for about 18 months.

 

there is a plug on the top of the pump which you can unscrew and stick a screwdriver down to see if the pump is seized or not. i used to have to do this every autumn when first firing up on our old gas system that i took out.

 

the plug head is about the size of a 10p coin and has a big flat slot in the top to undo it with.

 

if the pump turns its obviously not seized but the motor could still be kaput.

[Tamworthbay]

im not an expert mate but i did plumb in my solid fuel system last year and i was an engineer for about 18 months.
 
there is a plug on the top of the pump which you can unscrew and stick a screwdriver down to see if the pump is seized or not. i used to have to do this every autumn when first firing up on our old gas system that i took out.
 
the plug head is about the size of a 10p coin and has a big flat slot in the top to undo it with.
 
if the pump turns its obviously not seized but the motor could still be kaput.

Looked at that but sadly my British gas installed one has a captive 10mm bolt not the slotted cap so can't work it out that way. Thanks anyway.

[ShaunaFTW]

Yeah it sounds like your pump is deaders. What pump have you got in there? If you isolate the flow and return then take the head of the pump off you'll be able to see if it's seized.

[Tamworthbay]

Yeah it sounds like your pump is deaders. What pump have you got in there? If you isolate the flow and return then take the head of the pump off you'll be able to see if it's seized.

would that be the Allen headed bolts by any chance? It says its a British gas multi head 2.

[ShaunaFTW]

 

Yeah it sounds like your pump is deaders. What pump have you got in there? If you isolate the flow and return then take the head of the pump off you'll be able to see if it's seized.

would that be the Allen headed bolts by any chance? It says its a British gas multi head 2.

 

 

 

Yeah it sounds like your pump is deaders. What pump have you got in there? If you isolate the flow and return then take the head of the pump off you'll be able to see if it's seized.

would that be the Allen headed bolts by any chance? It says its a British gas multi head 2.

 

Most pumps have four allen bolts, I've never worked with Glow worms so I couldn't tell you without knowing what make pump was on there.

[Tamworthbay]

Yeah it sounds like your pump is deaders. What pump have you got in there? If you isolate the flow and return then take the head of the pump off you'll be able to see if it's seized.

would that be the Allen headed bolts by any chance? It says its a British gas multi head 2.

 

Yeah it sounds like your pump is deaders. What pump have you got in there? If you isolate the flow and return then take the head of the pump off you'll be able to see if it's seized.

would that be the Allen headed bolts by any chance? It says its a British gas multi head 2.

Most pumps have four allen bolts, I've never worked with Glow worms so I couldn't tell you without knowing what make pump was on there.

Thanks mate, I will give it a look. The only writing on the pump that makes sense to be is the British gas multihead 2, there is loads of other stuff on there but it doesn't look like a name. I guess its British Gas's own make perhaps? Having a look on eBay the pumps seem to be a fairly standard fitment. It looks a fairly straightforward job to swap it over, any potential pitfalls?

[CityEPete]

BG dont make any parts they just have their branding and sometimes colour put on them, I think the mutlihead 2 is one of these?

http://www.anchorpum...turers/grundfos but painted blue? If you can identify it to the exact one it will make the job loads easier! What system do you have there a Y plan? If it has isolation valves either side then simply shut them off, swap the pump and open the valves. The main issue you might get is an airlock. by the way I am a heating controls installer for BG :-D

[CityEPete]

https://www.google.c...7785588;300;225

 

This should be the one? same as the red grundfos 15-60 which is now been replaced but you might pick up a new old stock one off ebay for a good price.

Edited by CityEPete, 14 May 2014 - 08:50 PM.

[Tamworthbay]

BG dont make any parts they just have their branding and sometimes colour put on them, I think the mutlihead 2 is one of these?
http://www.anchorpum...turers/grundfos but painted blue? If you can identify it to the exact one it will make the job loads easier! What system do you have there a Y plan? If it has isolation valves either side then simply shut them off, swap the pump and open the valves. The main issue you might get is an airlock. by the way I am a heating controls installer for BG :-D

do you do foreigners? it has isolation valves either side, not sure on the Y plan but if that means a post pump split for heating and hot water via an electrical valve then yes.

[Tamworthbay]

https://www.google.c...7785588;300;225

I think its this one:

http://i.ebayimg.com...rHqJ,!lwFHDHVGt)bBR2sDWJ2LQ~~60_35.JPG

It seems there were more than one type with the same name though as some come up with the slot on the front.

[CityEPete]

I stay away from the water side of things! If it has a single 3 port valve it is a Y plan, if it has two 2 port valves it is an S plan (generally incase we have any pedants!) so yep its a Y plan I think.

[CityEPete]

I cant get the image to come up, if it has a big sticker on the front pull it off and see if there is a large flat head screw to remove, if so take it out, you might get a dribble of water, some have an allen head inside on the end of the impeller give it a spin and try putting the power on after replacing the cap.

[CityEPete]

Could be this one http://www.anchorpum...s2-15-50-60-130

 

or there is a squarer one, trying to think which model it is as a non BG one....I think you might be describing the other one you know. Dont try and split it to swap the head, its not worth it.

Edited by CityEPete, 14 May 2014 - 08:58 PM.

[Tamworthbay]

I cant get the image to come up, if it has a big sticker on the front pull it off and see if there is a large flat head screw to remove, if so take it out, you might get a dribble of water, some have an allen head inside on the end of the impeller give it a spin and try putting the power on after replacing the cap.

in the middle there is a 10mm bolt which is captive, I will peel the sticker off tomorrow as its dark as hell in the airing cupboard. If i do it how do I avoid the potential airlock you mentioned?