Hi Louis
Filling the system is easy. With the boiler off and cold just open the two valves at the ends of the sliver braided hose. Allow the system to reach a pressure of between 1 and 1 1/2 bar on the pressure guage. Do not go over this as it could open the pressure relief valve once the system is hot
Also under the gas safety installation an use regulations your landlord must provide you with an anual gas safety inspection certificate and ensure thast all gas burning appliences are in a good working order. If not he is failing in his duty as a landlord and is reportable to the HSE. This is the LAW and he must follow it.
Marc
October 2007