Hi,
I recently moved into a new house with a Puma 80e combi boiler running the heating system. Since moving in, the radiator in bathroom was cold at the top so one day I bled it, releasing air as expected and this fixed the radiator problem although a day or two later the boiler 'low pressure warning' light came on and the gauge was in the red, below 0.5 bar. Having read bits of the manual and looked through posts on the site, I located the filling loop and got the pressure back up to the right level (approx 1.5 bar) where guide needle was. However, not too long after, the pressure fell again and there was very little pressure in the hot tap.
On this occasion (early in the morning), opening the filling loop valve did not seem to do anything - no sound of water coming in and accidentally, this was left open all day while I went to work (other half's fault!)... so when I returned, the new neighbours thought I had a burst pipe as water was coming out a drain in the back of the house, flooding their garden. I immediately shut the filling loop valve, stopping the flow of water and noted the pressure was way up above the 3 bar mark - from what I've read, there is a pressure relief valve, acting as a safety valve which has restricted the pressure, discharging the water outside instead of breaking the boiler! Is this right?
Anyway, this little incident seemed to serve the purpose of flushing the whole system with new water. I then proceeded to bleed some radiators around the house, reducing the pressure back to the desired level and we ran the heating and all seemed well and the radiators all heated while the hot water also worked with no problems. However, when checking the pressure gauge, it had risen again back to around the 3 bar mark! However, when turning the heating off, the pressure falls and keeps falling in to the red zone and sits around 0-0.5 bar causing the low pressure warning light to come on and this is the situation I've got now. I need to fill it a little in order to get pressure to use the heating and when the heating is on, it rises too much and when off, it falls too much. Can anyone explain? I know it's not right to keep filling the system but don't know what to do to fix the problem.
Has leaving the filling loop open and new water in the system caused this perhaps and maybe it will takea while for the pressure to stabalise? Have I maybe broken the PRV by having too much pressure over too long a time? Also, with the new water in the system being fresh and clean, should I be putting in some chemicals to stop corrosion and if so, how do I get these into the closed system?
Sorry for how long this post is and thanks if you're still reading! As you can tell, I'm more or less a complete novice here so any help would be greatly appreciated.
Cheers.
I recently moved into a new house with a Puma 80e combi boiler running the heating system. Since moving in, the radiator in bathroom was cold at the top so one day I bled it, releasing air as expected and this fixed the radiator problem although a day or two later the boiler 'low pressure warning' light came on and the gauge was in the red, below 0.5 bar. Having read bits of the manual and looked through posts on the site, I located the filling loop and got the pressure back up to the right level (approx 1.5 bar) where guide needle was. However, not too long after, the pressure fell again and there was very little pressure in the hot tap.
On this occasion (early in the morning), opening the filling loop valve did not seem to do anything - no sound of water coming in and accidentally, this was left open all day while I went to work (other half's fault!)... so when I returned, the new neighbours thought I had a burst pipe as water was coming out a drain in the back of the house, flooding their garden. I immediately shut the filling loop valve, stopping the flow of water and noted the pressure was way up above the 3 bar mark - from what I've read, there is a pressure relief valve, acting as a safety valve which has restricted the pressure, discharging the water outside instead of breaking the boiler! Is this right?
Anyway, this little incident seemed to serve the purpose of flushing the whole system with new water. I then proceeded to bleed some radiators around the house, reducing the pressure back to the desired level and we ran the heating and all seemed well and the radiators all heated while the hot water also worked with no problems. However, when checking the pressure gauge, it had risen again back to around the 3 bar mark! However, when turning the heating off, the pressure falls and keeps falling in to the red zone and sits around 0-0.5 bar causing the low pressure warning light to come on and this is the situation I've got now. I need to fill it a little in order to get pressure to use the heating and when the heating is on, it rises too much and when off, it falls too much. Can anyone explain? I know it's not right to keep filling the system but don't know what to do to fix the problem.
Has leaving the filling loop open and new water in the system caused this perhaps and maybe it will takea while for the pressure to stabalise? Have I maybe broken the PRV by having too much pressure over too long a time? Also, with the new water in the system being fresh and clean, should I be putting in some chemicals to stop corrosion and if so, how do I get these into the closed system?
Sorry for how long this post is and thanks if you're still reading! As you can tell, I'm more or less a complete novice here so any help would be greatly appreciated.
Cheers.
