I have an open system with a standard boiler and combined feed vent pipe with an air seperator fitted. Recently I was going to drain down, add cleaner, drain, refill etc I have noticed something that I consider odd though.
When the heating and hot water are on there seem to be no circulation in the feed and expansion tank. After 3 hours of heating the tank is not even warm. I was under the impression it should at least get warm? As a result I do not want to add anything to the tank as I dont see how it will enter the rest of the system. I know I can add at other points in the system but this issue is making me curious/concerning me.
Can anyone explain this for me?
PS HW and CH are all working fine.
When the heating and hot water are on there seem to be no circulation in the feed and expansion tank. After 3 hours of heating the tank is not even warm. I was under the impression it should at least get warm? As a result I do not want to add anything to the tank as I dont see how it will enter the rest of the system. I know I can add at other points in the system but this issue is making me curious/concerning me.
Can anyone explain this for me?
PS HW and CH are all working fine.
