I have a 5 year old Ideal Classic Gas Boiler on a sealed system which has been running fine until I decided to get involved (boy, do I regret that now). The pressure had dropped to just below 1 bar so I decided to increase it using the Filling Loop, which seemed to work fine…I increased to 1.5 bar.
However, once I turned the boiler on it continued increasing to 3.5 bar, at which point I used the PRV to reduce it to 1.5 bar again. I turned off the boiler but it still increased to 3 bar over the next 4 – 5 hours. I keep reducing the pressure using the PRV but it gradually increases again, increasing faster if the boiler is on. At one point I reduced the pressure to zero bar by bleeding a rad in the kitchen, when I turned the key the water sprayed out about 5 feet and did not decrease in force that much even when it had reached zero.
Strangely, the Filling Loop is permanently attached to the system, I should probably change this to a detachable loop. I know the wheel is closed tight but it’s always possible that there is a leak into the system. How likely is this and what is the best way to check this.
What are the other possibilities that would cause the system pressure to continually rise? Over the past 2 days I have removed about 12 – 15 litres of water by using the PRV and bleeding the rad. I have a call in to a plumber but he said it would be a couple of days before he can get to me. I’m just worried about the water loss to the system, I don’t want to cause any damage…I am using the system sparingly at the moment.
I read from some of the other posts that it may have something to do with the Expansion Vessel. Not quite sure what this does so any information would be appreciated.
If anyone has a link to a website that explains the workings and configuration of a sealed system, it would help me a lot.
Thanks in advance for your help.
However, once I turned the boiler on it continued increasing to 3.5 bar, at which point I used the PRV to reduce it to 1.5 bar again. I turned off the boiler but it still increased to 3 bar over the next 4 – 5 hours. I keep reducing the pressure using the PRV but it gradually increases again, increasing faster if the boiler is on. At one point I reduced the pressure to zero bar by bleeding a rad in the kitchen, when I turned the key the water sprayed out about 5 feet and did not decrease in force that much even when it had reached zero.
Strangely, the Filling Loop is permanently attached to the system, I should probably change this to a detachable loop. I know the wheel is closed tight but it’s always possible that there is a leak into the system. How likely is this and what is the best way to check this.
What are the other possibilities that would cause the system pressure to continually rise? Over the past 2 days I have removed about 12 – 15 litres of water by using the PRV and bleeding the rad. I have a call in to a plumber but he said it would be a couple of days before he can get to me. I’m just worried about the water loss to the system, I don’t want to cause any damage…I am using the system sparingly at the moment.
I read from some of the other posts that it may have something to do with the Expansion Vessel. Not quite sure what this does so any information would be appreciated.
If anyone has a link to a website that explains the workings and configuration of a sealed system, it would help me a lot.
Thanks in advance for your help.