[. . . ] ­ If your unit is installed in a ducting hood, prepare the air exhaust hole. When installing ducting hoods, to achieve the best possible conditions use an air exhaust pipe that : is as short as possible, has a minimum of curves (maximum angle: 90°), is made of a material that complies with the standards (which vary from nation to nation) and is smooth on the inside. It is also advisable to avoid any drastic changes in pipe section (diameter: 150 mm). ASSEMBLING - Using the special drilling template, drill the holes for fixing to the ceiling on the vertical side of your hob. [. . . ] ASSEMBLING - Using the special drilling template, drill the holes for fixing to the ceiling on the vertical side of your hob. carefully observe all the indications for final positioning of the apparatus. Take into account that one of the template axes must correspond to the axis of the hood controls. Fix the bracket to the ceiling using the screws and screw anchors provided (Fig. Be careful, because the position of the bracket determines the final position of the apparatus: the side with the slot B corresponds to the side opposite the controls. Ducting version: Fix the telescopic structure to the bracket by means of 4 screws (provided), running the air evacuation pipe through the telescopic structure and the electric power cable through the special hole in the bracket (Fig. 6), taking into account that the height of the hood is 45 mm and that the distance between the hood and the hob must be at least 650 mm (Fig. Take the upper flue (with the round slots) and fit it on the telescopic structure with the slots facing upwards; fit the flue to the bracket with 2 screws (Fig. Take the lower flue and fit it in the same manner as before; slide it to the top and stop it in that position using a adhesive tape (Fig. 10H) and assemble it onto the opening of the hood for air venting, pressing slightly. When the sensor activated, the hood switches on automatically in the presence of any kinds of odours or vapours, smokes or heat, caused by the cooking process and also in the presence of possible and anomalous gas emissions in environment. To deactivate the Air Refresh function, press the button P3 until the icon D7 goes off. Starting the function Air Refresh, the hood recycles the air in the environment in perfect silence, starting every 5 minutes (for 10 minutes, at the first speed). NOTE: The Sensor and Air Refresh functions can be activated simultaneously by pressing the button P3 until both the icons (D4 and D7) come on. The icon switches on when the engine is at the first, second or third speed. To the fourth speed, the icon switches off and the icon starts working to the maximum speed (icon D3). It switches on when it is time to replace the charcoal filter/s (after about 120 working hours). One time the charcoal filter/ s is replaced, to make the hours calculation start again press the button P4. Sensor sensitivity: the sensor sensitivity can be modified by simultaneously pressing the buttons P3 and P4 (the value set appears on the display D5 and may be between 1 and 9). Warning: in order to avoid damaging the sensor, never use silicone products near the hood! [. . . ] Sensor sensitivity: the sensor sensitivity can be modified by simultaneously pressing the buttons P3 and P4 (the value set appears on the display D5 and may be between 1 and 9). Warning: in order to avoid damaging the sensor, never use silicone products near the hood!Grease filters: the grease filter/s require particular care and must periodically be cleaned in relation to use. 18) appears on the control display every 30 hours of hood operation to indicate that the grease filter/s need to be cleaned. [. . . ]