Chamberlain 475M Owner's Manual

INSTALLATION
Mounting the standby power unit (SPU) can be done using one
of two methods. The SPU 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 SPU Directly to the Motor Unit.
• Position the SPU on top of the motor unit. Make sure the
motor unit power cord is drawn out from beneath the SPU.
The SPU should sit firmly on top of the motor unit. Adjust
angle iron placement so that it is out of the way of the SPU's
installation (Figure 1).
• Align the two screw slots on the SPU to the back chassis
holes.
• Secure the SPU to each side of the chassis flanges with 3/4"
screws provided.
2. Mounting the SPU Directly to a Structural Support.
• After the motor unit has been installed, the SPU can be
mounted to either the ceiling or a wall within 3' (.9 m) of the
motor unit.
• Position the SPU as desired to a structural support (ceiling
joist or wall stud) (Figure 2).
• Attach the SPU to the support using the mounting holes on
either side of the SPU.
• Secure the SPU using the 1-1/2" lag screws (provided).
3. Connect the SPU to the Motor Unit.
• Disconnect the motor unit from the electrical outlet.
• Connect the SPU cord into the connector on the
end panel on the motor unit. Connect the motor
unit to the electrical outlet. The SPU will activate
and all LEDs will turn on for 3 seconds.
• The green LED will begin flashing, indicating the
SPU is charging from the motor unit.
IMPORTANT NOTE: Installation of SPU when
permanent electrical power is not available (such as
new construction and the electricity is not installed)
may damage the batteries. Unplug SPU after testing
to prevent damage.
Holes for
Ceiling
Mount
Standby Power
Unit (SPU)
Side Screw
Slots for
Lag
Chassis Mount
Screw
1-1/2"
STANDBY POWER UNIT
Model 475LM Owner's Manual
To prevent possible SERIOUS INJURY or DEATH from
electrocution, disconnect ALL electric and battery power
BEFORE performing ANY service or maintenance.
ALWAYS wear protective gloves and eye protection
when changing the battery or working around the battery
compartment.
Lag Screws
1-1/2"
475LM Standby
Power Unit
Power Cord
Bring Power
Bring SPU Cord out right
Cord out left
side slot away from Antenna
side slot
3/4" Screw
3/4" Screw
SPU Cord
SPU Cord
Power Cord
Figure 1
Structural
Supports
Figure 2
475LM Standby
Power Unit
SPU
Connector