H
honestinjun
I have a Vaillant TurboMax plus 837E combi boiler attached to an old single pipe (cast) system with 10 radiators and a significant volume of water within the pipes alone.
I recently found the pressure vessel was leaking and was incapable of absorbing the pressure rise when the water temperature rose above about 60 degrees.
I replaced the PV with a new identical 10 litre tank from Vaillant which was fitted reasonably easily and pumped to 1 Bar.
On filling the system everything appears to work ok however when the system was running hot with the old PV (while it was still working ok), the pressure rose from 1.5 Bar to about 1.9 Bar. With the new PV fitted, the pressure rises from 1.5 Bar to 2.5 Bar.
Everything seems ok but with an old single (cast) pipe system, I am concerned that running at 2.5 Bar will put old dodgy joints under too much pressure and am also puzzled as to why there should be such a rise in pressure if the faulty PV was the only problem and this is now fixed.
Any suggestions as to why the system (configuration is unchanged) should now register an expansion of 1 Bar when it used to only increase by 0.4 Bar and given that it seems stable, is it ok to keep it running in the red at 2.5 Bar (risk of leaks aside)?
Advice much appreciated.
I recently found the pressure vessel was leaking and was incapable of absorbing the pressure rise when the water temperature rose above about 60 degrees.
I replaced the PV with a new identical 10 litre tank from Vaillant which was fitted reasonably easily and pumped to 1 Bar.
On filling the system everything appears to work ok however when the system was running hot with the old PV (while it was still working ok), the pressure rose from 1.5 Bar to about 1.9 Bar. With the new PV fitted, the pressure rises from 1.5 Bar to 2.5 Bar.
Everything seems ok but with an old single (cast) pipe system, I am concerned that running at 2.5 Bar will put old dodgy joints under too much pressure and am also puzzled as to why there should be such a rise in pressure if the faulty PV was the only problem and this is now fixed.
Any suggestions as to why the system (configuration is unchanged) should now register an expansion of 1 Bar when it used to only increase by 0.4 Bar and given that it seems stable, is it ok to keep it running in the red at 2.5 Bar (risk of leaks aside)?
Advice much appreciated.