Hi,
I read in the manual of the vaillant boiler has A.A.V (automatic air vent) cap on the pump which should loosened when commissioning it. So i guessing this should stay loosened all the time?
So if there is any air in the sealed system it will take it out?
I read in the manual of the vaillant boiler has A.A.V (automatic air vent) cap on the pump which should loosened when commissioning it. So i guessing this should stay loosened all the time?
So if there is any air in the sealed system it will take it out?