Best Practice Guide for Warehouses 2008 - (Page 6) WAREHOUSE BUILDINGS Energy Efficiency With rising energy costs, making warehouse facilities operate as efficiently as possible is of increasing importance. Good lighting control design not only reduces costs, but helps preserve non-renewable resources that are used to create energy. Sustainable Building Practices The U.S. Green Buildings Council’s LEED program encourages architects to use a holistic building design approach. This includes optimizing daylight penetration and views to the exterior as well as designing well-integrated systems that maximize energy savings. In a green building design, lighting controls are important for three primary reasons. First, they enable compliance with ASHRAE 90.1-2004, a stated prerequisite under LEED v2.2. Second, LEED encourages architectural daylighting design, which can actually increase a building’s energy consumption if not accompanied by automatic controls that dim or turn off electric lights when adequate daylight exists. Third, electrical energy usage can be further reduced by integrating the operation of lighting and mechanical systems. Safety and Security Providing lighting when and where it is needed is a key factor of safety and security. Proper design and use of lighting controls is an integral part of addressing these concerns. Location and accessibility of manual controls, adequate emergency lighting, timely exterior lighting control, reliable system operation as well as other lighting control elements all play a part in ensuring safety and security in commercial office buildings. Warehouse Building Lighting Control Design Guidelines A well-designed control system requires the consideration of energy codes, the occupants’ and building owner’s control needs, building use patterns and the types of lamps, ballasts and luminaries that will be used in each space. Most energy standards require implementing automatic lighting control systems for turning lights off when they are not needed. This may be accomplished using either time-based controls or occupancy sensors. Occupancy sensors are commonly used for controlling lighting in individual areas or rooms, such as warehouse rack areas, individual bays in bulk storage areas, private offices, restrooms and conference rooms. Lighting control panels with an integral time clock that turns low-voltage relays off at predetermined times are commonly used when occupancy-based control does not suit the project needs, or when control of large lighting zones, or multiple circuits, is needed. Examples of these types of areas include large open office areas and exterior and site lighting. Listed below are some general lighting control best practice principles for lamps and ballasts, daylighting, and spaces commonly found in warehouses. General Lighting Control Guidelines • • • • • • Always mount passive infrared occupancy sensors so that the sensor has a direct line-of-sight view to the motion in the area. Mount them so that the sensor views motion only in the defined room area. Many lighting control devices have specific voltage and load ratings requirements. Be sure to specify the model that matches the correct voltage and load rating for the application. In spaces of high occupant ownership such as private offices and conference rooms, always include switches for local off control of the lighting. Use manual-on control for added energy savings. Use daylighting control zone sizes that are matched to the daylight distribution and to the space use functions. Use stepped switching or continuous dimming to maintain the minimum design illuminance on the task (horizontal and vertical). Use stepped dimming (on/off, or hi/lo switching) in warehouse areas. Use continuous dimming in office areas. In warehouse areas, use open loop daylighting control. 6 Watt Stopper/Legrand
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