echoflex MOS-21 Series Installation Manual page 4

1. Select a location to the mount the sensor on the ceiling by identifying the
movement patterns that will be the most common in the space.
• For smaller office spaces where hand motion on a desktop is common,
locate the sensor off to one end of the desk, in line with the desk edge
or slightly behind so the PIR lens has direct line-of-sight to the keyboard
desktop area. Insure that the PIR lens does not have direct line-of-sight
out a doorway where walk-by traffic could trigger the sensor.
• Larger offices where larger body motion is more common, placement of
the sensor is less critical.
2. For the best sensor performance, mount the sensor so at least one of
the solar cells is facing a light fixture. The sensor will operate in low light
levels however for best performance, a minimum of 4 foot candles must
be maintained. If the controlled lights in the space are dimmable either
manually of via daylight harvesting, insure the light level at the lowest
dimmed level meets this 4 FC requirement. If the light value does not meet
this requirement, install a battery.
3. Remove the cover by pushing upwards on the cover. Using a small
screwdriver for leverage, insert under the clear plastic lens at one of the
relief tabs in the base plate and pull up. You will need to repeat with at
least two tabs until the lens pops free.
4. Choose a mounting method. The sensor can be mounted:
• With the screws and anchors (not provided) to a wall-board ceiling. Use
a pencil to mark the mounting base key hole locations and remove the
sensor. Using a drill, bore the two holes and insert the anchors. Install
the screws, leaving them loose while you place the sensor. Tighten the
screws.
• With double sided tape or Velcro™, not provided. Cut two lengths of
tape and remove the backing. Place on the mounting surface of the
sensors back plate, pressing down. Remove the backing from the tapes
other side and place the sensor on the ceiling surface, pressing firmly.
5. Replace the sensor cover aligning the button hole with the teach button
and press in place.
6. Refer to the section titled Linking the Sensor to a Receiver.
Linking the Sensor to a Receiver
This process requires the controller or receiver to be mounted and powered and
within range of the sensor to be linked.
1. Activate LEARN or LINK mode at the receiver, if necessary refer to the
manufacturers documentation.
2. Tap the sensors TEACH button once.
3. Deactivate LEARN mode at the receiver.
NOTE: If the sensor is already linked to a controller, linking again will un-link the sensor.
Installing or Replacing the Start Assist Battery
The battery is not required for normal operation of the MOS-21xA and MOS-
21xB models. The battery (model CR2032) may be useful for installation
purposes (test mode operation and linking) or for applications where there are
long periods of no light.
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