We have had some problems with our boiler in the student house, we have a Vokera Linea 24. I have managed to re pressurize the boiler using the filling loop, but one of my housemates had twisted a black knob thing that is situated further behind the filling loop, can anyone tell us what that black knob is for? ive tried to look in the manual but it doesn't say what it is and its not on the diagrams! it has little arrows on it saying 'open' and 'close'.
PLEAASEEEE help!
Thanks
PLEAASEEEE help!
Thanks
