First things first - I'm no plumber - and my boiler is a 105E.
Mine has TWO valves - one from inlet (mains) and other to enter pipe into heating system.
There will probably be a flexible pipe linking them both.
Have a look for a second valve. I PRESUME there are 2 in case the flexible pipe needs to be removed.
If sucessful keep an eye on pressure as you transfer water to system. Raise pressure to 1.0-1.5 Bar.
The boiler MAY need resetting as it will have switched off below about 0.5 bar.
Steve
December 2006