Hi, this 'problem' has been happening for years but I have decided to get it seen to....
My gran has a Baxi Bermuda Inset BS/TS BBU and the pipes seen to 'bang' loudly when the CH is on.
Decided to do a bit of Inspector Clueso tonight...
When there is a demand for heat from the room thermostat, the pump kicks in and the boiler will fire in quick succession. However when the demand is satisfied, and you hear the thermostat 'click' off the pump immediately stops but the boiler burner remains on. After a few seconds, the pipes from the boiler begin to 'bang' loudly, echoing throughout the system then the boiler will shut off after around ten seconds and the noise will gradually fade away.
I assume this is happening because the pump is shutting off but not the burner, thus not taking heat away form the boiler, maybe an overheat stat. or something is cutting the burner off. When the banging is happening just after the burner shuts off, you can immediately silence it by turning the room stat. up, kicking the pump to life and taking the heat away form the boiler.
Is this boiler meant to work like this, or is there supposed to be a pump overrun, as the pump is certainly not overrunning?
My gran has a Baxi Bermuda Inset BS/TS BBU and the pipes seen to 'bang' loudly when the CH is on.
Decided to do a bit of Inspector Clueso tonight...
When there is a demand for heat from the room thermostat, the pump kicks in and the boiler will fire in quick succession. However when the demand is satisfied, and you hear the thermostat 'click' off the pump immediately stops but the boiler burner remains on. After a few seconds, the pipes from the boiler begin to 'bang' loudly, echoing throughout the system then the boiler will shut off after around ten seconds and the noise will gradually fade away.
I assume this is happening because the pump is shutting off but not the burner, thus not taking heat away form the boiler, maybe an overheat stat. or something is cutting the burner off. When the banging is happening just after the burner shuts off, you can immediately silence it by turning the room stat. up, kicking the pump to life and taking the heat away form the boiler.
Is this boiler meant to work like this, or is there supposed to be a pump overrun, as the pump is certainly not overrunning?