Document No. 540-743
Installation Instructions
September 10, 2009
Mounting Information
Locate the sensor:
•
according to design specifications and local
regulations.
•
where the air circulates around it freely (not
in recessed areas or behind doors).
•
allowing a minimum of 4 inches (100 mm)
free space above and below for proper
airflow, the front cover removal tool, and the
computer communication cable.
•
away from drafts caused by doors, windows,
outside walls, air registers, pipes, return air
plenums, etc.
•
away from heat sources such as strong
lights, fireplaces, direct sunlight, etc.
•
on an inside wall (preferably), about 5 feet
(1.5 m) above the finished floor.
NOTE:
While not recommended, if you must mount
the sensor on exterior brick or cement-type
walls, see
Accessories
.
Drywall Mounting (No Rough-in),
Typical
1. Mark the center (cable) hole and the mounting
hole locations using the sensor base plate as a
template. See Figure 2.
CAUTION:
For drywall mounting, only use the top
and bottom holes.
2. Drill two 3/16-inch (4.8 mm) mounting holes.
3. Cut a 1-inch (25 mm) center hole with a hole
saw.
4. If using screws to attach the sensor, insert two
plastic wall anchors.
5. Pull about three inches (75 mm) of the cable
through the mounting hardware in the order
shown. See Figure 2.
Figure 2. Drywall Mounting (No Rough-in), Typical.
6. Mount the sensor base plate on the wall, noting
the UP arrow on the stabilizer plate:
a. Install either the two mounting screws
provided, the drive rivets provided, or
spring clips, but do not tighten.
CAUTION:
Pounding too hard or over-tightening may
cause the sensor base plate to crack or
bend.
b. Level the sensor base plate for
appearance.
c. Tighten the two mounting screws to the
sensor base plate.
7. Cut the cable, leaving about 3 inches (75 mm)
on the sensor side of the drywall.
CAUTION:
For retrofits: Before cutting the cable,
make sure it is disconnected from the
UC/MBC/RBC.
8. Unplug the terminal block from the back of the
printed circuit board (PCB) and terminate the
cable wires at the sensor terminal block. For six-
position terminal blocks, see Figure 3. For four-
position terminal blocks, see Figure 4. Also see
Figure 5 (MBC/RBC) or Figure 6 (UC). Reinstall
the terminal block.
Siemens Building Technologies, Inc.
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