How do I fill the water tank on the L48Acw20?

First, unplug the unit from the mains socket, then turn the water tank switch anticlockwise at the rear of the unit and slide the water tank out. Pour water in, keeping it below the MAX level, and optionally add ice boxes to improve cooling performance. Slide the water tank back in and turn the water tank switch downwards to lock it securely. (Page 9)