BRK electronic CO5120B - Manual (Page 10)

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3. Push the locking pin through the black dot on
the label on the back of the CO alarm.
TO UNLOCK THE BATTERY COMPARTMENT:
IMPORTANT !
Once the CO alarm is installed, you must
disconnect it from the AC power before
unlocking the battery compartment.
DANGER !
ELECTRICAL SHOCK HAZARD. Turn off the
power to the area where the CO alarm is
installed before removing it from the mounting
bracket. Failure to turn off the power first may
result in serious electrical shock, injury or
death.
WARNING !
Always discharge the branch circuit before
servicing an AC or AC/DC CO alarm. First,
turn off the AC power at the circuit breaker or
fuse box. Next, remove the battery from CO
alarms with battery back-up. Finally, press
and hold the test button for 5-10 seconds to
discharge the branch circuit.
1. Remove the CO alarm from the mounting
bracket. If the unit is locked to the bracket,
see the section “To Deactivate the Locking
Feature.”
2. Disconnect the power connector by gently
prying it away from the back of the CO alarm.
3. Insert a flathead screwdriver under the head
of the locking pin, and gently pry it out of the
battery compartment lock. (If you plan to re-
lock the battery compartment, save the
locking pin.)
4. To re-lock the battery compartment, close
the battery door and reinsert the locking pin
in the lock.
5. Reconnect the power connector to the back of
the CO alarm, reattach the CO alarm to the
mounting bracket, and restore the power.
IMPORTANT !
When replacing the battery, always test the CO
alarm before re-locking the battery compartment.