Hello
I have a newly installed closed central heating system that has a difficult to find pressure loss problem.
The boiler is a Vaillant ecotec 612 which has an internal auto air vent - AAV.
I notice the installer has also included two further AAVs one the main supply and return pipes, about 4 metres from the boiler and before the motorised valves.
I am wondering if the extra AAV on the return pipe could have anything to do with the pressure loss problem?
BTW the pressure loss appears to be random and overnight when the system is not running.
Any ideas much appreciated.
I have a newly installed closed central heating system that has a difficult to find pressure loss problem.
The boiler is a Vaillant ecotec 612 which has an internal auto air vent - AAV.
I notice the installer has also included two further AAVs one the main supply and return pipes, about 4 metres from the boiler and before the motorised valves.
I am wondering if the extra AAV on the return pipe could have anything to do with the pressure loss problem?
BTW the pressure loss appears to be random and overnight when the system is not running.
Any ideas much appreciated.