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The optional locking features are designed to prevent unauthorized removal of the battery or alarm. It is not necessary to activate the
locks in single-family households where unauthorized battery or alarm removal is not a concern.
These CO Alarms have two separate locking features: one locks the battery compartment, and the other locks the CO Alarm to the mounting
bracket. You can choose to use either feature independently, or use them both.
Tools you will need:
• Needle-nose pliers • Standard/Flathead screwdriver.
Both locking features use locking pins, molded into the mounting bracket. Using needle nose pliers or a utility knife, remove one or both pins,
depending on which locking features you use.
USING THE OPTIONAL LOCKING FEATURES
Locking Pin
THE BATTERY COMPARTMENT LOCK:
TO LOCK THE BATTERY COMPARTMENT:
Do not lock the battery compartment until you have activated the battery and
tested the battery back-up.
1. Activate the battery back-up by removing the “Pull to Activate Battery Back-
Up” tab. Push and hold the test button on the CO Alarm’s cover until you
hear an acknowledge chirp and the alarm sounds: 4 beeps, pause, 4 beeps,
pause.
If the unit does not alarm during testing, DO NOT lock the battery com-
partment! Install a new battery and test again. If it still does not alarm,
replace the CO Alarm immediately.
2. Using needle-nose pliers or a utility knife, detach one locking
pin from the mounting bracket.
3. Push the locking pin through the black dot on the label on the
back of the CO Alarm.
TO UNLOCK THE BATTERY COMPARTMENT:
Once the CO Alarm is installed, you must disconnect it from the AC power before unlocking the battery
compartment.
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.
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 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 bat-
tery 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.
When replacing the battery, always test the CO Alarm before re-locking the battery compartment.
THE MOUNTING BRACKET LOCK
Tools you will need:
• Needle-nose pliers
• Standard/Flathead screwdriver
TO ACTIVATE THE BRACKET LOCK:
1. Using needle-nose pliers, detach one locking pin from the mounting bracket.
2. Insert the locking pin into the lock located on the pivoting
hinge of the battery door.
3. When you attach the CO Alarm to the mounting bracket,
the locking pin’s head will fit into a notch on the bracket.
TO DEACTIVATE THE BRACKET LOCK:
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 electri-
cal shock, injury or death.
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 Alarms with battery back-up.
Finally, press and hold the test button.
1. Insert a flathead screwdriver between the mounting bracket pin and the
mounting bracket.
2. Pry the CO Alarm away from the bracket by turning both the screwdriver
and the CO Alarm counterclockwise (left) at the same time.
TO PERMANENTLY REMOVE THE BRACKET LOCK:
Insert the flathead screwdriver between the locking pin and the
lock, and pry the pin out of the lock.
