[. . . ] Do not connect the appliance to the electrical power supply until installation is completed. [. . . ] Use 20 W max halogen bulbs only, making sure not to touch them with your hands. Open the extractor grille or remove the selfsupporting grease filter (depending on model). To access the carbon filter seat, rotate the knobs 90° and open the lid. Turn the carbon filter locking knob 90° (check that the filter is secured, otherwise rotate it further). Open the extractor grille or remove the selfsupporting grease filter (in this last case wash the filter immediately). After the grease filter has been replaced or cleaned (depending on model), refit the parts in reverse order, making sure the entire extraction surface is covered. [. . . ] Valve open/close switch (only AKR 645): move the switch to the right to open the valve and extract steam and fumes (the hood must be connected to a peripheric extractor unit). [. . . ]