11
MAINTENANCE
6 720 803 600 (2012/06)
4. Test whether the filling key is locked properly in closed padlock position by pulling down on the key.
If the key is loose, can be rotated or pulled out of the filling link please repeat steps 1 to 3.
5. With filling key in locked position turn the water mains inlet knob (white) anticlockwise to open.
This fills the heating system with mains water.
6. When the pressure gauge reads 1.5 bar turn the white water mains inlet knob clockwise to close.
7. Turn the filling key anticlockwise to the open padlock position and remove from the charging link.
8. Stow the filling key back inside the bottom panel underneath the boiler.
