Best Practice Guide for Warehouses 2008 - (Page 8) WAREHOUSE BUILDINGS • • • Set time delay to at least 10 minutes. Consider the existing circuit layout if retrofitting. If the existing circuiting does not align with needed control groups, then use luminaire-mounted occupancy sensors for controlling luminaires individually. Match daylighting control zone sizes to the functions of the space. Rack Storage Aisles • Use passive infrared occupancy sensors in storage aisles because line-of-sight detection is required for these areas. • Mount occupancy sensors to prevent detection outside the aisle. The mounting location relative to the end of the aisle will depend upon the sensor and luminaire mounting height. Sensors should not be placed where they will detect motion in adjacent aisles. • Set time delay to at least 10 minutes. • If retrofitting, consider the existing circuit layout. If the existing circuiting is perpendicular to the row and does not align with needed control groups, then consider using the HB luminaire-mounted occupancy sensor for controlling luminaires individually, as shown in solution W-WA2.0. • Coordinate the control of electric lighting with the vertical daylight illuminance distribution in aisles, not the horizontal distribution. Illuminance levels on the vertical face of the rack are more critical than horizontal illuminances. • Use daylighting control zone sizes that coincide with the rack aisle area. Main Travel Aisle • Schedule lighting in the main travel aisle so that it turns on when the building becomes occupied, and turns off after normal occupancy hours. • Consider keeping either all, or many, of the main travel aisle luminaires on night light circuits for safety. Shipping and Receiving • Use passive infrared occupancy sensors because line-of-sight detection is required for these areas. • Mount occupancy sensors to the luminaires to facilitate installation and maintenance. This also keeps sensors above the main level of activity and provides optimal coverage. • Use multiple occupancy sensors with overlapping coverage patterns to overcome obstacles such as stacked palettes. Published coverage patterns will need to be derated for these applications to accommodate obstructions; therefore, additional occupancy sensors are typically recommended. • Set time delay to at least 10 minutes. • Consider the existing circuit layout if retrofitting. If the existing circuiting does not align with needed control groups, use luminaire-mounted occupancy sensors for controlling luminaires individually. • Consider keeping some of the luminaires on night light circuits for safety. Walk-in Cooler or Freezer • Use the HB passive infrared occupancy sensors in cold storage areas. Consult factory for application guidance. Refrigerated Warehouses • Use low-temperature passive infrared occupancy sensors such as the HB-C. • Determine the minimum temperature that will occur in the refrigerated areas. This may drive the product selection. • If retrofitting, consider the existing circuit layout. If the existing circuiting is perpendicular to the row and does not align with needed control groups, then consider using the HB-C luminaire mounted occupancy sensor for controlling luminaires individually. 8 Watt Stopper/Legrand
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