Repressurise boiler

[braindead81]

Can't find how to add pressure to boiler after bleeding radiators I think it's the black valve at the back but not shore
There is a switch that says boiler off filling loop but nowhere to connect other end of loop think it's been close off any advice apreciated.

 

[ianmcd]

you have a vokera linea Boiler and someone has altered the filling valves so it wont be as it tells you in the manual, yes the black handled valve , open that untill the pressure is between 1 and 1.5 Bar then close again