OBSTRUCTION LIGHTING FOR STACK These recommendations are based on Chapter 6 of Annex 14 of ICAO (International Civil Aviation Organization latest edition) As per FAA and ICAO aerodrome design manual, 3 lights may be required per level if the diameter is less than 6 meters, 4 lights if the diameter is between 6 and 30 meters, 6 lights if the diameter is between 30 and 60 meters and 8 lights if it is above 60 meters Day and night operation (stack without red and white stripes) 45 to 105 meters high Dual color medium intensity up to 6 meters below the top of the stack (red flashing at night, white flashing during daytime) Low intensity type B or FAA L-810(F) at mid level (red at night, off the day) Power cabinet and photocell Position DescriptionModel 1 & 4 ICAO dual color medium intensity type A/B and L-865/L-864 kit including 3 lights and cabinets at top and bottomOFI120-RW-48-240-U 2 Low intensity type B NAVILITE (3 units)NAVILITE-IR-FAA-120-240V 3 Photocell (day/night switch)PHOTOCELL DC Night only operation (stack with red and white stripes) up to 45 meters high 3 or more low intensity type B or FAA L-810 close to the top 45 to 105 meters high 3 or more red medium intensity up close to the top of the stack 3 or more low intensity type B or FAA L-810(F) at mid level In case of medium intensity, control cabinet and photocell oriented to the North should be present at bottom PositionDescriptionModel 1 Medium intensity type B (3 units) 2 Low intensity type B (3 units) 3 Controller 4 Photocell (night only operation) Chimney higher than 150 meters high Below the top and around the perimeter of the chimney, high-intensity type A obstruction lights shall be installed, with levels spaced at a maximum interval of 105m. The number of lights per level depends on the diameter of the chimney: 3 lights if the diameter is less than or equal to 6m 4 lights if the diameter is between 6m and 30m 6 lights if the diameter is between 30m and 60m 8 lights if the diameter is greater than 60m High intensity obstruction lights are synchronized white flashing lights operating permanently with three luminous intensity levels varying according to: Day: 200,000 candelas Twilight: 20,000 candelas Night: 2,000 candelas At the base, a controller equipped with a day/twilight/night photocell ensures the automatic switching of luminous intensity and the monitoring of the beacons. DescriptionPart number At each level of the chimney high intensity type A obstruction lightsOFH-120-RW-240 At the bottom of the chimney ControllerOFH-CTR-CAN Photocell for day/twilight/night changePHOTOCELL DC
