The boiler
The casing of the boiler consists of metal and synthetic material which can be cleaned with a normal cleanser. At the left front side of the
boiler is an opening door panel. You can already see a part of the control lights and the display through the dark transparant window. After
opening the door, the control panel with the function keys is clearly visible. The control panel is provided with a number of push-buttons with
corresponding lights. The meaning of these push-buttons is explained hereunder.
