Installation and Maintenance

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Introduction

Proper installation of a control system is critical to obtain a fully operating and properly functioning system. Many manufacturers are working toward a plug and play approach where the control system operates out of the box once it is connected and power is activated. One caution with this approach is that for many systems, default performance will not be optimized unless further calibration or adjustments are made. This step is often referred to as control system commissioning, where system operation is calibrated or adjusted. System performance in terms of both energy savings and occupant acceptance depends on the system settings that are entered when the system is calibrated or commissioned.

Some examples of systems that require initial commissioning or calibration include the following:

Occupancy/Vacancy Sensors : Sensor sensitivity and directional adjustments need to be set to achieve proper coverage across a space while avoiding false readings from within a space or outside a space, such as through an opening into an adjacent hallway.

Photosensors : Daytime calibration under a representative sky condition is required to calibrate the photosensor reading under a daylight condition to a dimmed light or switch setting to establish the control relationship for the electric lighting zone in response to daylight. This calibration is usually performed for a critical work plane point. Self calibrating systems should be checked to ensure they are operating properly. If self calibration does not provide the desired control, these systems should be manually calibrated.

Scene Control : The output settings for each control group, or each controlled luminaire in the case of a digital control system, must be established for each desired lighting scene.

Different lighting control systems have different configurations for the type and arrangement of the various wires that are required to be run between the different system components. It is important for the system installers to have a thorough understanding of how these systems need to be installed to allow the installation to proceed smoothly and correctly. Troubleshooting may be required to correct any errors or problems as the lighting control system installation proceeds.

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