Hi just fill the system until 1 bar on the front of the boiler then bleed 1 rad then check the pressure again and top back up too 1 bar. Do this until all rads are free of air and the pressure reads 1 bar when finished on the front of the boiler. Hope this helps.
Hi, as long as the filling loop under your boiler is connected at both ends(cold water mains one end and return ch the other) then your pressure should read 1 bar min. If its under that your boiler will not work. Hope this helps.
