Good afternoon,
I am experiencing a pressure issue with my heating system and was hoping to receive additional insight as to what the problem could be.
We have a biomass boiler and stratification tank set up and recently had an issue with boiler pressure dropping off when the system was cold. I checked the PRV and there was no evidence of it releasing water and then checked the boiler's expansion vessel which had failed. Ordered and fitted new vessel (checked pre-charge before doing so) and alas the problem still persists! (The old expansion vessel was definitely faulty).
When the heating system cuts out at temperature and the circulation pump stops, the pressure drops from around 1.6 bar to zero. The new expansion vessel is still charged, the PRV is not bypassing but the pressure still drops down to nothing. It is a 2 pipe system feeding 12 radiators.
The only possible solutions I can ascertain are:
1) the pipe leading to the expansion vessel is blocked
2) there is a massive leak on the central heating side of things - although there is no sign of this so far.
3) I have the Grundfos Alpha2L circ. pump set on the incorrect settings (currently on proportional pressure 2 PP2)
Basically, I was wondering if there are any glaringly obvious issues that I have seemingly overlooked before I start lifting floorboards!
Any assistance or insight would be hugely appreciated.
I am experiencing a pressure issue with my heating system and was hoping to receive additional insight as to what the problem could be.
We have a biomass boiler and stratification tank set up and recently had an issue with boiler pressure dropping off when the system was cold. I checked the PRV and there was no evidence of it releasing water and then checked the boiler's expansion vessel which had failed. Ordered and fitted new vessel (checked pre-charge before doing so) and alas the problem still persists! (The old expansion vessel was definitely faulty).
When the heating system cuts out at temperature and the circulation pump stops, the pressure drops from around 1.6 bar to zero. The new expansion vessel is still charged, the PRV is not bypassing but the pressure still drops down to nothing. It is a 2 pipe system feeding 12 radiators.
The only possible solutions I can ascertain are:
1) the pipe leading to the expansion vessel is blocked
2) there is a massive leak on the central heating side of things - although there is no sign of this so far.
3) I have the Grundfos Alpha2L circ. pump set on the incorrect settings (currently on proportional pressure 2 PP2)
Basically, I was wondering if there are any glaringly obvious issues that I have seemingly overlooked before I start lifting floorboards!
Any assistance or insight would be hugely appreciated.