Two examples are shown here, a public restroom (top) with a single sensor and an open office (bottom) with multiple networked sensors. Researchers are now exploring even more ways to detect occupants, such as light-differential sensing. Other methods include microwave sensors, which emit low-power microwaves and detect changes in occupancy, and camera-based sensors, which take multiple images of the coverage area per second. Dual-technology (DT) sensors combine PIR with ultrasonic or acoustic sensing. The most common single-technology methods are passive infrared (PIR) and ultrasonic (US). Shown here is a coverage pattern for a wall switch ultrasonic sensor. The value is typically a maximum, which may be adjusted based on sensitivity setting, room dimensions, mounting height, presence of obstacles and other factors. This allows meaningful product comparison. NEMA WD-7 offers testing and reporting methods for coverage areas and patterns, which compliant manufacturers report in their literature. Coverage shape is the resulting shape of these boundaries, which may be a circle, rectangle, ellipse, tear drop, etc. Coverage area defines the boundaries within which the sensor can detect motion. The resulting coverage is expressed as coverage area and pattern. The sensor’s sensitivity defines at what distance it can detect major (i.e., body) and minor (i.e., hand) motion. While ON/OFF is more common, light reduction is well suited to applications where the lights must stay ON but are frequently unoccupied, such as this stairwell, or where the lamp does not start quickly, as in the case of HID lamps. Occupancy and vacancy sensors may turn the lights OFF or reduce the lighting via stepped switching or dimming.
Full-ON sensors provide convenience, which may be regarded as an amenity. Manual- and partial-ON sensors tend to save more energy because the occupant may want to leave the lights OFF or at a lower level.
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Full-ON sensors activate the lights at full output. Partial-ON sensors activate the lights to a designated level such as 50%, and the occupant then uses a switch to bring the lights to full output.
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Manual-ON sensors (also called vacancy sensors) require the occupant to turn the lights ON using a manual switch, which may be integral to the sensor (shown here is an example). The majority of commercial building energy codes require manual- or partial-ON operation. Within 15 minutes I was able to finish the whole project but had to wait few hours to get this photo of everything back together.Occupancy sensors may be specified as manual-, partial- or full-ON devices. Might as well replace them all while I’m at it. In this image, I’ve placed the three old light bulbs I’ve replaced on the right with a new one on the left. The new light bulb is on the left, and the burnt out old on the right. With a simple switch of that small flat blade screwdriver, I was able to remove the H3’s HVAC light blub. The back cover came off with very little effort by starting one end and slowly working my way to the other end. I’ve now disconnected the wires so that the HVAC Cluster is detached from the dash panel so that it’s easier to work with.Ĭarefully I used a very small flat blade screwdriver to separate the back cover of the HVAC. I used a 7mm socket to remove the HVAC Control System from the dash panel. After which you’ll need to remove four bolts that hold the HVAC Control to the dash with a 7mm socket (or at least that is what I used). I know it sounds weird, but trust me it works amazingly. The HVAC Instrument Panel Light Bulbs are for sale in my store for $20.00 for five of them.īegin with putting your finger in the cigarette lighter socket and put up to release the dash. Now I’m on the hunt to purchase a large quantity of them so that I can sell them to on my websites shop. Replacing the light bulbs only took about 15 minutes of my time.
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Expensive and very wasteful I found out how to get my hands on the light bulbs from a guy on eBay. 15840354 CONTROL, A/C Instrument Panel, or with the part ACDelco 15-73909 GM Original Equipment Heating and Air Conditioning Control Panel with Rear Window Defogger Switch. I called up GM about getting it fixed but all they want to do is completely replace the GM Part No. A few months later, I had two light bulbs that didn’t illuminate on my HVAC (Heating, Ventilation, and Air Conditioning) Control Panel which began to make choosing the setting on the instrument panel difficult at night. About year ago in my dashboard a light bulb for controlling the vents went out on my H3 Hummer, making it difficult to see which setting I had the ventilation on.
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