What is this noise??

[MummyBear]

hi All

We had a new cylinder fitted yesterday. A really loud noise started this morning when I ran a bath. The noise only stopped when we switched the boiler off at the wall.

Any ideas if this is normal? If not what the problem is? I have a video of the noise but can't work out how to upload

Thanks!

 

[MummyBear]

This is the new cylinder

 

[Crofton Gas]

That is not a finished install and shouldnt be used.

Regards

 

[Madrab]

Yup, your installer should have told you not to use that. It should never have been commissioned into the hot and cold and it's heat source enabled without its safety devices connected!!

Can't see how it's was working though with the cold water turned off and the expansion open?? is that picture as it is at the moment?

 

[MummyBear]

Hello. Sorry that was a pic taken during installation. I just wanted to show the type of cylinder. Will try and upload the video of it now

 

[MummyBear]

 

[Crofton Gas]

Is the pump new? Is there pressure in the system?

 

[MummyBear]

Pump is not new but I understood the pump was just for the radiators and radiators weren't on this morning

 

[Madrab]

The circulating pump also feeds the primary HW circuit too (sends HW through the cylinder to heat it up), don't use the boiler - just use the electrical immersion heater just now just for hot water and get the installers back in ASAP!!

 

[MummyBear]

Thanks Madrab. Do you think it's a problem with the pump or the installation?

 

[crank39]

Sounds like big end bearings to me

 

[Madrab]

That sounds mechanical so something to do with the pump possibly, whether it's been run dry or it's not been bled. At the right hand side in behind the cylinder is the circulator pump (red/black body), put your hand on the body, is it really hot and vibrating/rumbling?

 

[Beeb2501]

That sounds mechanical so something to do with the pump possibly, whether it's been run dry or it's not been bled. At the right hand side in behind the cylinder is the circulator pump (red/black body), put your hand on the body, is it really hot and vibrating/rumbling?

Perhaps one of the valves either side of the pump is shut?

It sounds a lot like this.

Or even this (play from 52 secs ish).

 

[AGAS]

try undoing the screw on front of the pump to let some water out with everything turned of for now . but your pump sounds fooked

 

[Beeb2501]

....but your pump sounds fooked

I agree - judging by the appalling noises its making, the pump needs replacing ASAP.

I think the existing pump is a fire risk so I'd shut the boiler down immediately (off at boiler itself and MCB/RCD off at fusebox) and I wouldn't fire it up again until a new pump is in place. I'd also replace the two gate valves either side of the pump and (while you're at it) fit as new motorised valve.