Chamberlain WD952LD - Manual (Page 32)

32
To prevent possible SERIOUS INJURY or DEATH from
electrocution, disconnect power to motor unit BEFORE
proceeding.
Mounting the battery backup unit (BBU) can be done
using one of two methods. The BBU can be mounted
directly on top of the motor unit or it can be secured on a
structural support just above it.
1.
Mounting the BBU Directly to the Motor Unit.
• Position the BBU on top of the motor unit. Make sure
the motor unit power cord is drawn out from beneath the
BBU. The BBU should sit firmly on top of the motor unit.
Adjust angle iron placement so that it is out of the way
of the BBU’s installation (Figure 1).
• Align the two screw slots on the BBU to the back
chassis holes.
• Secure the BBU to each side of the chassis flanges with
3/4" screws provided.
Holes for Ceiling Mount
Side Screw
Slots for
Chassis Mount
Battery Backup
Unit (BBU)
Lag Screw
1-1/2"
2. Mounting the BBU Directly to the Ceiling Structural
Support.
• After the motor unit has been installed, position the BBU
above the motor unit to a structural support (joist) within
BBU’s cord length of 3' (.91 m) (Figure 2).
• Attach the BBU to the support by using the ceiling
mount holes on either side of the BBU.
• Secure the BBU to the ceiling using 1-1/2" lag screws
(provided).
3. Connect the BBU to the Motor Unit.
• Disconnect the motor unit from the electrical outlet.
• Connect the BBU cord into the connector on the right
side of the end panel on the motor unit. Connect the
motor unit into the electrical outlet. The BBU will activate
and all LEDs will turn on for 3 seconds.
• The green LED will begin flashing indicating the BBU is
charging from the motor unit.
IMPORTANT NOTE: Installation of BBU when permanent
electrical power is not available (such as new construction
and the electricity is not installed) may damage the
batteries. Unplug BBU after testing to prevent damage.
Lag Screws
1-1/2"
Structural
Supports
3/4" Screw
3/4" Screw
Power
Cord
Power
Cord
Antenna
BBU
Connector
?
?
Bring Power Cord
out left side slot Bring BBU Cord out right
side slot away from Antenna
?
Figure 1
Figure 2
BATTERY BACKUP UNIT