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Occupancy sensor detects occupancy based on the temperature difference between the occupant
and its surroundings.
To be precise, to enhance the sensitivity of the sensor to occupant movements, the occupancy
sensor is designed to detect the changes in the amount of infrared light emitted from an object in
the detection zone, including human bodies.
The occupancy sensor will not detect occupancy if no movements exist.
The sensor also becomes less sensitive to occupancy when the temperature difference between
the occupant and its surroundings is small.
• Select the installation location carefully to avoid false detection.
Factors that contribute to false detection by the occupancy sensor
• Direct sunlight to the remote controller
• Supply air directed straight toward the remote controller
• Fireplace in the detection zone
• Portable heater (e.g., oscillating electric heater) in the detection zone
• Excessive vibrations or large impact inflicted on the remote controller
• Strong electrical noise
• Movements of small animals, such as cats and dogs
Handling precautions
• Keep the lens scratch-free.
• Do not place adhesive tape or labels over the lens.
• Use a soft cloth to clean the lens.
Brightness sensor
Horizontal direction Vertical direction
44°
Remote
controller
Wall
Figure 3
44°
22°
22°
Remote
controller
Floor
Wall
Figure 4
Do not install the controller in a place where
the difference between the remote controller
surface temperature and the actual room
temperature will be great.
If the temperature difference is too high,
room temperature may not be adequately
controlled.
To avoid deformation and malfunction, do
not install the remote controller in direct
sunlight, where the ambient temperature
may rise above 40ºC (104°F) or drop below
0ºC (32°F), or where the relative humidity
may rise above 90% or drops below 20%.
To reduce the risk of malfunctions, do not
install the controller in a place where water
or oil may come into contact with the
controller, or in a condensing or corrosive
environments.
Do not install the remote controller directly
onto electrically conductive objects such as
metal plate that has not been painted.
To use the Energy Saving Assist function in
a system with both main and sub remote
controllers, activate the function only on the
remote controller whose coverage area is
the largest.
Important
WT06829X02.book Page 7 Wednesday, June 26, 2013 4:03 PM