K
kinlungchan
System Saunier Duval System 400 (25 year old combi boiler)
Boiler has been making a loud thudding whoosh sound which rattles the case when firing back up during normal use. I think they call it "explosive ignition"
The Boiler was serviced by British Gas a few days ago. He told me this was normal. I think the feriocity of the whoosh and rattling of internals has increased since he balanced the radiators. More heat from all 12 radiators and better running system.
The boiler pressure in bars goes from 1 to 4. It's just below 1 before turning on and slowly creeps up to just under 3 in about a hours time of use. Is this normal?
Again the British Gas engineers said the system was fine and signed off the service.
My knowledge and understanding has come from using google over last few days (i'am by no means an expert) and the same things terms & answers seem to come up.
ie you shouldn't see a big increase in pressure during use, explosive ignition problem is not normal and needs checking. The filling loop needs to be disconnected. And loss of charge/pressure in expansion vessel can cause rise in pressure.
Does anyone see a pattern here? I would like to call a local engineer to fault find this and would like some background knowlegde to ask questions.
Thanks in advance Tony.
Boiler has been making a loud thudding whoosh sound which rattles the case when firing back up during normal use. I think they call it "explosive ignition"
The Boiler was serviced by British Gas a few days ago. He told me this was normal. I think the feriocity of the whoosh and rattling of internals has increased since he balanced the radiators. More heat from all 12 radiators and better running system.
The boiler pressure in bars goes from 1 to 4. It's just below 1 before turning on and slowly creeps up to just under 3 in about a hours time of use. Is this normal?
Again the British Gas engineers said the system was fine and signed off the service.
My knowledge and understanding has come from using google over last few days (i'am by no means an expert) and the same things terms & answers seem to come up.
ie you shouldn't see a big increase in pressure during use, explosive ignition problem is not normal and needs checking. The filling loop needs to be disconnected. And loss of charge/pressure in expansion vessel can cause rise in pressure.
Does anyone see a pattern here? I would like to call a local engineer to fault find this and would like some background knowlegde to ask questions.
Thanks in advance Tony.
