I would be very grateful if someone can give me some advice on the following.
I have a Worcester 28Si II combi boiler in the house where I live, the hot water side is working fine, however I have an issue on the radiator heading side.
When the heating is on the bar pressure is going very high, I have filled the system so the bar pressure reads 1 bar at cold, however once the heating is activated the bar pressure is eventually going past 3 bar, at this point I turn the heating off. I have also noticed at this point the relief valve is activated as water is coming from the pressure relief pipe on outside of house, I assume with the high pressure building in the system.
To try and remedy I have checked the air pressure on the car tire type valve on the expansion vessel. The valve was checked by pushing the center pin and only air came out (no water vapor). A car tire pump was used on the valve to attempt to re-pressure the expansion vessel, however I'm not sure what pressure should be used for the expansion vessel, I have been told it should be 0.5 bar however to me this seams quite low. After pressuring the expansion vessel the same issue with system pressure going high still exists.
Could someone please confirm what bar pressure the expansion vessel should be pressurised to?
Also is there anything else I can check to what could be wrong.
Also if it helps, I first noticed the issue when the heating went off, when I checked the boiler the bar pressure was showing 0 (needle was resting on stop), and with a flashing light on boiler. This appeared to happen quick as if something had suddenly failed to cause the issue.
Many thanks for you help.
I have a Worcester 28Si II combi boiler in the house where I live, the hot water side is working fine, however I have an issue on the radiator heading side.
When the heating is on the bar pressure is going very high, I have filled the system so the bar pressure reads 1 bar at cold, however once the heating is activated the bar pressure is eventually going past 3 bar, at this point I turn the heating off. I have also noticed at this point the relief valve is activated as water is coming from the pressure relief pipe on outside of house, I assume with the high pressure building in the system.
To try and remedy I have checked the air pressure on the car tire type valve on the expansion vessel. The valve was checked by pushing the center pin and only air came out (no water vapor). A car tire pump was used on the valve to attempt to re-pressure the expansion vessel, however I'm not sure what pressure should be used for the expansion vessel, I have been told it should be 0.5 bar however to me this seams quite low. After pressuring the expansion vessel the same issue with system pressure going high still exists.
Could someone please confirm what bar pressure the expansion vessel should be pressurised to?
Also is there anything else I can check to what could be wrong.
Also if it helps, I first noticed the issue when the heating went off, when I checked the boiler the bar pressure was showing 0 (needle was resting on stop), and with a flashing light on boiler. This appeared to happen quick as if something had suddenly failed to cause the issue.
Many thanks for you help.