Chamberlain CM475 Owner's Manual

OWNER'S MANUAL
WARNING
CAUTION
Battery Backup
Unit (BBU)
1. Mounting the BBU directly to the Ceiling within BBU's
cord lenght
• After the motor unit has been installed, position the BBU next
to the motor unit to a structural support (joist) within BBU's
cord length.
• 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).
2. Connect the BBU to the Motor Unit.
• Disconnect the motor unit from the electrical outlet.
• Connect the BBU cord into the connector on the bottom of
the motor unit.(see picture below) 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.
5
Holes for Ceiling Mount
Side Screw
Slots for
optional mounting
TM
To prevent possible SERIOUS INJURY or DEATH from
electrocution, disconnect ALL electric and battery power BEFORE
performing ANY service or maintenance.
Lag Screw
1-1/2"

OPERATING INSTRUCTIONS

1. Test the installed BBU with the motor unit.
To test the BBU, disconnect the motor unit power cord from the
electrical outlet.
• A solid yellow LED indicates the BBU is operating on battery
power.
• A flashing yellow LED with beep indicates the BBU is
operating on battery power and that the battery charge is low.
• To test the BBU is functioning properly, open and close the
garage door.
• Re-connect the motor unit power cord back into the electrical
outlet.
• Verify that the green LED is flashing on the BBU (indicates
that the BBU is now charging).
• Test completed
2. Charge the battery.
• Allow the batteries 24 to 48 hours to fully charge before using
the BBU system.
A fully charged BBU supplies 24V DC to the motor unit for one
to two days of normal operation during an electrical power
outage. If the battery voltage drops too low, the batteries will
disconnect and the motor unit will no longer operate under
battery power.
After the electrical power has been restored, the batteries will
recharge within 48 hours. Under normal usage batteries will last
3 to 5 years.
To obtain maximum battery life and prevent damage, also
disconnect the battery backup if you unplug the motor unit
while on vacation or any other extended period of time.
NOTE: Door operation may be limited until batteries are fully
charged. The motor unit's lights will not turn on during BBU
mode.
BATTERY BACKUP UNIT
Model CM475
WARNING WARNING
WARNING