FEATURES
This CO Alarm is designed to be hard-wired and
mounted on any standard size junction box, up to 4”
size. 120V AC power to the junction box must not be
controlled by a dimmer or switch (other than a circuit
breaker.)
MODEL CO5120PDB—USER’S MANUAL
AC POWERED CARBON MONOXIDE ALARM
WITH BATTERY BACK-UP AND
DIGITAL DISPLAY
This CO Alarm samples the air and takes a new read-
ing about every second. A microchip inside the unit
stores each reading, and remembers the levels of CO
it has been exposed to over time. The unit goes into
alarm mode when it has been exposed to a “critical”
level of CO (measured in parts per million or “ppm”)
within a specified time (measured in minutes).
General features: This Alarm features a permanently
installed sensor, a red indicator light (LED), and an
85 dB alarm horn.
9V Battery Back-Up. If AC power is interrupted,
the CO Alarm will continue to operate for a short
time, provided the 9V battery is fresh and correctly
installed.
Silence Feature. The Silence feature temporarily
quiets the alarm.
Low Battery Silence Feature. Temporarily silences
the Low Battery Warning “chirp” for up to 8 hours if
AC power is present.
120VAC 60 Hz 0.09A
Digital Display. Shows levels of CO, measured in
parts per million present and any stored peak levels.
Model
CO5120PDB
Malfunction Warning. This unit performs
self-diagnostic tests approximately every second.
If the alarm malfunctions, it should be replaced
immediately.
PLEASE READ CAREFULLY AND SAVE:
This unit was shipped with a user’s manual
that contains important information about its
operation. If you are installing this unit for use
by others, you must leave this manual—
or a copy of it—with the user.
M06-1060-000 08/01
Basic safety information (continued)...
HOW YOUR CO ALARM WORKS
THE COVER OF YOUR CO ALARM
NEVER ignore any alarm. Refer to Chapter 3 for
more information on how to respond to an alarm.
Failure to respond can result in injury or death.
5
2
3
Test this Carbon Monoxide Alarm once a week. If
it ever fails to test correctly, have it replaced
immediately! If the alarm is not working properly, it
cannot alert you to a problem.
4
1
Do not paint over the CO Alarm. Paint may clog
the openings to the sensing chamber and prevent
the sensors from operating properly.
This product is intended for use in ordinary indoor
locations of family living units. It is not designed to
measure CO levels in compliance with
Occupational Safety and Health Administration
(OSHA) commercial or industrial standards.
Individuals with medical conditions may consider
using warning devices which provide audible and
visual signals for carbon monoxide concentrations
under 30 ppm.
1.
Test/Silence/Scroll Button: Press and
release to select mode (Test, Memory,
Clear Memory); Press and hold to activate
mode, or to silence the alarm.
2.
3.
4.
POWER/ALARM Light (RED)
Air Vents
(Behind the Cover) Alarm Horn: 85db
audible alarm for test, alarm, and unit
malfunction warning.
Disconnect AC power before changing battery.
Shock hazard exists if AC power is miswired.
5.
Digital Display
1
UNDERSTANDING YOUR CO ALARM
WHAT YOU SEE AND HEAR UNDER
DIFFERENT CONDITIONS
BASIC POWER CONDITIONS
During a power failure (in battery back-up)
Horn
Chirps briefly
Alarm
Low / missing
battery warn-
ing
Display
The word “bat”
Alarm
operating on
AC power
is displayed
operating on
emergency
battery back-up
POWER/
ALARM Light minute
Flashes once a
WHAT YOU SEE AND HEAR DURING INSTALLATION
Under normal conditions (AC power)
Horn
Silent
When the electricity comes back on
Display
Dash remains lit
at “READY”
Horn
Chirps briefly
POWER/
Shines
Display
Dash appears by
“READY” within
a minute
ALARM Light continuously
POWER/
Shines
When you test the CO Alarm
Horn
ALARM Light Continuously
Sounds loudly -
4 beeps, pause,
4 beeps, pause
Display
Flashes “888”
briefly
POWER/
Flashes once
Continued...
ALARM Light per second
2
What You See and Hear Under Different
Conditions (continued)...
WHAT YOU SEE AND HEAR IF CO IS DETECTED
Pre-Alarm Levels
If battery becomes low or is missing
Horn
Silent
Horn
Chirps once
a minute*
Display
Shows CO levels
detected in ppm
Display
The word “bat”
flashes on and off
POWER/
Shines
ALARM Light continuously
POWER/
Flashes once a
ALARM Light minute
*Note: If the battery becomes very weak, you will
hear extra “chirps.” Replace the battery immediately!
Alarm levels of CO are detected (Over 70 ppm)
Horn
Sounds loudly -
4 beeps, pause,
4 beeps, pause.
This sequence
repeats for as
long as the unit
is in alarm*
Disconnect AC power before changing battery.
Shock hazard exists if AC power is miswired.
If the CO alarm is not operating properly
Horn
Three rapid chirps
every minute
Display
Shows CO levels
detected in ppm
Display
Displays “Err”
POWER/
Flashes once
POWER/
Flashes three
ALARM Light per second
ALARM Light times in sync with
the horn
*Note: If unit goes into alarm under battery back-up
power, the regular 4 beeps-brief pause cycle will
repeat for four minutes. After four minutes, the pause
will increase to 1 minute.
Continued)...
3
What You See and Hear If CO Is Detected
(continued)...
The “Latching Alarm” Indicator
Horn
Silent
If you silence the alarm
Display
Dash remains lit
at “READY”
Horn
Silent for about
4 minutes*
POWER/
Flashes once every
Display
Shows CO levels
detected in ppm
ALARM Light 5 sec., on initiating
unit in an intercon-
nected series
POWER/
ALARM Light per second
Flashes once
USING THE CO MEMORY
The CO Memory Feature lets you check
the highest level of CO recorded.
*Note: After 4 minutes, if CO levels drop below alarm
levels, the unit will remain silent and return to normal
operation. If CO present still indicates a potentially
dangerous situation, the horn will sound again. If CO
levels increase during the silence period, the horn will
resume sounding.
To check CO Memory:
1. Press and release the
Test/Silence/Scroll button until
dash scrolls to “MEMORY.”
2. Press and hold Test/Silence/Scroll
button to display Memory CO level.
If alarm levels of CO are detected by an
interconnected (remote) alarm
To clear CO Memory:
1. Press and release the
Horn
Sounds loudly -
4 beeps, pause,
4 beeps, pause.
This sequence
repeats for as
Test/Silence/Scroll button until the
dash scrolls to “CLEAR MEMORY.”
2. Press and hold the
long as the remote
Test/Silence/Scroll button until the
display shows “CLr.”
unit is in alarm*
NOTE: The highest CO level will be
saved, even after a power interruption,
until you clear it. DO NOT clear the CO
Memory reading if you plan to call
Display
Dash remains lit
at “READY”
POWER/
ALARM Light continuously
Shines
someone to investigate a CO problem!
Clear the CO Memory reading only
after the investigator has checked your home.
4
CO ALARM SPECIFICATIONS
Gas Detection at Typical Temperature and
Humidity Ranges: The CO Alarm is not formulated to
detect CO levels below 30 ppm typically. UL tested
for false alarm resistance to Methane (500 ppm),
Butane (300 ppm), Heptane (500 ppm), Ethyl Acetate
(200 ppm), Isopropyl Alcohol (200 ppm) and Carbon
Dioxide (5000 ppm). Values measure gas and vapor
concentrations in parts per million.
During Alarm: Repeating alarm horn pattern:
4 beeps, pause, 4 beeps, pause.
• Stand-alone unit: red light (LED) flashes once
per second.
• Interconnected series: red light (LED) flashes
once per second on the Initiating alarm. The
red light (LED) on all other alarms will shine
continuously.
Required Alarm Levels: Before 10% COHb exposure
at levels of 30% to 70% Relative Humidity (RH):
Warranty: 5-year limited warranty.
• 400 ppm CO between 4 and 15 minutes
• 150 ppm CO between 10 and 50 minutes
• 70 ppm CO between 60 and 240 minutes
Standards: Underwriters Laboratories Inc. Single and
Multiple Station carbon monoxide alarms UL2034.
According to Underwriters Laboratories Inc. UL2034,
Section 1-1.2: “Carbon monoxide alarms covered by
these requirements are intended to respond to the
presence of carbon monoxide from sources such as,
but not limited to, exhaust from internal-combustion
engines, abnormal operation of fuel-fired appliances,
and fireplaces. CO alarms are intended to alarm at
carbon monoxide levels below those that could cause
a loss of ability to react to the dangers of Carbon
Monoxide exposure.” This CO Alarm monitors the air,
and is designed to alarm before CO levels become life
threatening. This allows you precious time to leave the
house and correct the problem. This is only possible if
alarms are located, installed, and maintained as
described in this manual.
When exposed to a constant level of 30 ppm of CO,
this CO Alarm was tested not to go into alarm for at
least 30 days.
Audible Alarm: 85dB minimum at 10 feet.
Power: Powered by 120VAC. The 9V battery back-up
provides 8 hours of standby and sounds alarm for 12
hours with fresh battery. When AC power is on, red
light (LED) shines continuously. Under battery power,
red light flashes once a minute.
Malfunction: Horn chirps and light blinks 3 times (in
rapid succession) every minute and digital display
shows “Err”.
Dimensions: 5.4” diameter (approx.)
Supply Voltage: 120VAC 60Hz, 0.09A.
5
CHAPTER 2: INSTALLATION
WHERE TO INSTALL CO ALARMS
IN A MULTI-LEVEL HOME:
• Install at least one CO Alarm near or within each
The National Fire Protection Association (NFPA) rec-
ommends that a CO Alarm should be centrally locat-
ed outside of each separate sleeping area in the
immediate vicinity of the bedrooms. For added pro-
tection, install additional CO Alarms in each separate
bedroom, and on every level of your home.
separate sleeping area.
• For added protection, install at least one CO
Alarm on each level of the home. If you have a
basement, install that CO Alarm at the top of the
basement stairs.
If your bedroom hallway is longer than 40 feet, install
a CO Alarm at BOTH ends of the hallway.
• For added protection, install an additional CO
Alarm at least 20 feet (6 meters), where possi-
ble*, away from the furnace or fuel burning
heat source.
(*)In smaller homes or in manufactured homes and
RV’s where this distance cannot be maintained, install
the Alarm as far away from the furnace or other fuel
burning source. Installing the Alarm closer than 20
feet (6 meters) will not harm the Alarm, but may
increase the frequency of nuisance alarms.
BEDROOM
KITCHEN
BEDROOM
BEDROOM
GARAGE
HALL
LIVING ROOM
This Alarm must have AC or battery power to
operate. If the AC power fails, the battery back-up
will power the Alarm for a short time if the 9V
battery is fresh and correctly installed. If AC power
fails, and the battery is dead or missing, the Alarm
cannot operate.
BASEMENT
REQUIRED TO MEET NFPA RECOMMENDATIONS
SUGGESTED AREAS FOR INSTALLING ADDITIONAL CO ALARMS
IN A SINGLE-LEVEL HOME:
• Install at least one CO Alarm near or within each
separate sleeping area.
• For added protection, install an additional CO
Alarm at least 20 feet (6 meters), where possible*,
away from the furnace or fuel burning heat source.
6
WHERE NOT TO INSTALL THIS ALARM
DO NOT locate this CO Alarm:
This CO Alarm is designed for use inside a single-
family home or apartment. It is not meant to be
used in common lobbies, hallways, or basements
of multi-family buildings unless working CO
Alarms are also installed in each family living unit.
CO Alarms in common areas may not be heard
from inside individual family living units.
•
In garages, kitchens, furnace rooms, crawl spaces
and unfinished attics. Avoid extremely dusty, dirty
or greasy areas.
•
The CO Alarm should be at least 5 feet (2 meters),
preferably 20 feet (6 meters) from sources of
combustion particles such as stoves, furnaces,
and vehicles.
•
•
Avoid poorly ventilated kitchens, garages, and
furnace rooms.
In extremely humid areas. This alarm should be at
least 10 feet (3 meters) from a shower, sauna,
humidifier, vaporizer, dishwasher, laundry room,
utility room, or other source of high humidity.
This CO Alarm alone is not a suitable substitute
for complete detection systems in places which
house many people, like hotels or dormitories,
unless a CO Alarm is also placed in each unit.
•
Where the temperatures are regularly below 40˚ F
(4˚C) or above 100˚ F (38˚ C) including unheated
buildings, outdoor rooms, porches, or unfinished
attics or basements. Extreme temperatures may
shorten component or battery life.
In turbulent air, like near ceiling fans or open win-
dows. Blowing air may prevent CO from reaching
the sensors.
DO NOT use this CO Alarm in warehouses,
industrial or commercial buildings, special-
purpose non-residential buildings, RVs, boats, or
airplanes. This CO Alarm is specifically designed
for residential use, and may not provide adequate
protection in non-residential applications.
•
•
In direct sunlight.
7
USING THE OPTIONAL LOCKING FEATURES
The optional locking features are designed to pre-
vent 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.
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.
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.
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 the
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.
alarm sounds: 4 beeps,
pause, 4 beeps, pause.
If the unit does not alarm during testing, DO
NOT lock the battery compartment! 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 mount-
ing bracket.
Locking Pin
Continued on next page...
8
To Lock the Battery Compartment (continued)...
3. Push the locking pin through the black dot on the
label on the back of the CO Alarm.
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.)
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 elec-
trical shock, injury or death.
4. To re-lock the battery compartment, close the bat-
tery 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
Always discharge the branch circuit before servic-
ing 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.
When replacing the battery, always test the CO Alarm
before re-locking the battery compartment.
9
TO DEACTIVATE THE BRACKET LOCK:
THE MOUNTING BRACKET LOCK
Tools you will need:
• Needle-nose pliers
• Standard/Flathead screwdriver
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 elec-
trical shock, injury or death.
TO ACTIVATE THE BRACKET LOCK:
1. Using needle-nose pliers, detach one locking pin
from the mounting bracket.
Always discharge the branch circuit before servic-
ing 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. Insert a flathead screwdriver between the mount-
ing bracket pin and the mounting bracket.
2. Insert the locking pin into the lock located on the
pivoting hinge of the battery door.
Continued on next page...
3. When you attach the CO Alarm to the mounting
bracket, the locking pin’s head will fit into a notch
on the bracket.
10
To Deactivate the Bracket Lock (continued)...
HOW TO INSTALL
YOUR CO ALARM
2. Pry the CO Alarm away from the bracket by turn-
ing both the screwdriver and the CO Alarm
counterclockwise (left) at the same time.
This unit is designed to be mounted on any standard
wiring junction box up to a 4-inch diagonal size, on either
the ceiling or wall. Read “Where to Install CO Alarms”
and “Where Not To Install CO Alarms” before you begin
installation. If a junction box is not already in place, install
one using standard #12 or #14 gauge copper wire.
This Alarm must have AC or battery power to
operate. If the AC power fails, the battery back-up
will power the Alarm for a short time if the 9V bat-
tery is fresh and correctly installed. If AC power
fails, and the battery is dead or missing, the Alarm
cannot operate.
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.
BEFORE YOU BEGIN INSTALLATION
Find the pair of self-adhesive labels included with this
CO Alarm.
• On each label write in the phone number of your
emergency responder (like 911) and a qualified
appliance technician.
• Place one label near the CO Alarm, and the
other label in the “fresh air” location you plan to
go if the alarm sounds.
NOTE: A qualified appliance technician is defined as
“a person, firm, corporation, or company that either in
person or through a representative, is engaged in and
responsible for the installation, testing, servicing, or
replacement of heating, ventilation, air conditioning
(HVAC) equipment, combustion appliances and
equipment, and/or gas fireplaces or other decorative
combustion equipment.”
11
THE PARTS OF THIS CO ALARM
SINGLE-STATION INSTALLATION
Tools needed: Standard/Flathead screwdriver.
1
3
ELECTRICAL SHOCK HAZARD. Turn off power to
the area where you will install this unit at the circuit
breaker or fuse box before beginning installation.
Failure to turn off the power before installation may
result in serious electrical shock, injury or death.
2
2
6
CEILING MOUNTING:
3
1. Remove the mounting bracket from the
base. Position the screw slots on the
mounting bracket over the screws in the
junction box. Tighten the screws.
4
5
7
8
2. Using wire nuts, connect the power
connector to the AC power.
• Connect the white wire on the power
connector to the neutral wire in the
junction box.
9
• Connect the black wire on the
power connector to the hot wire in
the junction box.
• Tuck the violet wire inside the junction
box. It is used for interconnect only.
1
2
3
4
5
6
7
8
9
Mounting Bracket
Mounting Slot and Screw
Locking Pins (break out of bracket)
Hot (Black) AC Wire
3. Plug the power connector into back of the unit.
4. Position the base of the Alarm over the mounting
bracket and turn. The Alarm can be
positioned over the bracket every
60°. Turn the unit clockwise (right)
until the unit is in place.
5. Make sure CO Alarm is secured to
mounting bracket.
Neutral (White) AC Wire
Interconnect Wire (Violet)
Lever to Open Battery Compartment
Swing-Out Battery Compartment
Quick-Connect Power
6. If you are only installing one unit, restore power to
the junction box.
12
5. Position the base of the Alarm
over the mounting bracket so
display is rotated approximately
30º left of center. Turn the unit
clockwise (right) until display is
horizontal and the unit is in place.
6. Make sure CO Alarm is secured
to mounting bracket.
ELECTRICAL SHOCK HAZARD. Do not restore
power until the CO Alarm is completely installed.
Restoring power before installation is complete may
result in serious electrical shock, injury or death.
7. Make sure the unit is receiving AC power. Under
normal operation, the red indicator light will shine
continuously. Display shows a dash under “READY”.
8. If the red power indicator light does not light,
TURN OFF POWER TO THE JUNCTION BOX
and recheck all connections. If all connections are
correct and the red power indicator still does not
light when you restore the power, the unit should
be replaced immediately.
7. If you are only installing one unit,
restore power to the junction box.
ELECTRICAL SHOCK HAZARD. Do not restore
power until the CO Alarm is completely installed.
Restoring power before installation is complete may
result in serious electrical shock, injury or death.
WALL MOUNTING:
8. Make sure the unit is receiving AC power. Under
normal operation, the red indicator light will shine
continuously. Display shows a dash under “READY”.
9. If the red power indicator light does not light,
TURN OFF POWER TO THE JUNCTION BOX
and recheck all connections. If all connections are
correct and the red power indicator still does not
light when you restore the power, the unit should
be replaced immediately.
1. Position the junction box face
plate so screw holes are posi-
tioned as shown at right.
2. Remove mounting bracket
from the base. Position the
screw slots on the mounting
Enlarged view
bracket over the screws in the
junction box. Tighten the
screws.
3. Using wire nuts, connect the
power connector to the AC
ACTIVATING THE BATTERY BACK-UP
power.
• Connect the white wire on the power connector
to the neutral wire in the junction box.
• Connect the black wire on the power connector
to the hot wire in the junction box.
• Tuck the violet wire inside the junction box. It is
used for interconnect only.
Activate the battery back-up by removing the “Pull to
Activate Battery Back-Up” tab. You do not need to
open the battery compartment and reposition the bat-
tery during installation. DO NOT remove the battery
activation tab until AC power is turned on to con-
serve battery power. Test the alarm. Press and hold
the test button on the cover until the alarm sounds: 4
beeps, pause, 4 beeps, pause.
4. Plug the power connector into back of the unit.
13
INTERCONNECTING MULTIPLE CO ALARMS
Interconnected units can provide earlier warning of a
CO problem than stand-alone units, especially if the
problem starts in a remote area of the dwelling. If any
unit in the series senses CO, all units will alarm. To
determine which CO Alarm initiated an alarm, refer to
the table.
Interconnecting Multiple CO Alarms
6
7
B
A
}
}
8
5
4
3
5
On Initiating Alarm
Red LED Flashes Once per
Second
4
3
2
On All Other Alarms Red LED Shines Continuously
1
1
All wiring must conform to all local electrical codes
and Article 760 of the National Electrical Code. Refer
to NFPA, Chapter 2 and/or your local building code
for further connection requirements.
A
B
Unswitched 120VAC 60 Hz source
To Additional Model CO5120B or CO5120PDB
CO Alarms, Maximum = 18 alarms
AC and AC/DC CO Alarms can be interconnected.
Under AC power, all units will alarm when one
senses CO. When power is interrupted, only the
AC/DC units in the series will continue to send
and receive signals. AC powered CO Alarms will
not operate.
1
2
3
4
5
6
7
8
Carbon Monoxide Alarm
Ceiling or wall
Power connector
Wire nut
Interconnect units within a single family residence
only. Otherwise all households will experience
unwanted alarms when you test any unit in the series.
Interconnected units will only work if they are wired
to compatible units and all requirements are met.
It is recommended only BRK Electronics® carbon
monoxide alarms CO5120B, and CO5120PDB be
interconnected.
Junction box
Neutral (White) AC wire
Interconnect wire (Violet)
Hot (Black) AC wire
14
3. Using wire nuts, connect the power con-
nector to the AC power.
Interconnected units must meet ALL of the
following requirements:
• Connect the white wire on the power
connector to the neutral wire (usually
white) in the junction box.
• A maximum of 18 units total may be
interconnected. (See page 14 for details.)
• Connect the black wire on the power
connector to the hot wire (usually
black) in the junction box.
• Connect the violet wire on the power
connector to the interconnect wire in
the junction box. Repeat for each unit
you are interconnecting. Never connect
the hot or neutral wires in the junction
box to the violet interconnect wire.
• The same fuse or circuit breaker must power
all interconnected units.
• The total length of wire interconnecting the
units should be less than 1000 feet. The
interconnect wire should be Type 18 gauge
AWM or larger, rated at least 300V.
• If an interconnect wire is not already part of
your household wiring, you will need to
install one.
4. Plug the power connector into the back
of the CO Alarm.
Failure to meet any of the above requirements
could damage the units and cause them to
malfunction, removing your protection.
5. Position the base of the
alarm over the mounting
bracket and turn. The Alarm
can be positioned over the
bracket every 60°. Turn the
unit clockwise (right) until
the unit is in place.
MULTIPLE-STATION INSTALLATION
6. Make sure CO Alarm is secured
to the mounting bracket.
ELECTRICAL SHOCK HAZARD. Turn off power to
the area where you will install this unit at the circuit
breaker or fuse box before beginning installation.
Failure to turn off the power before installation may
result in serious electrical shock, injury or death.
ELECTRICAL SHOCK HAZARD. Do not restore
power until all CO Alarms are completely installed.
Restoring power before installation is complete may
result in serious electrical shock, injury or death.
7. Make sure each unit is receiving AC power. Under
normal operation, the red light (LED) will shine con-
tinuously. Display shows a dash under “READY”.
CEILING MOUNTING:
1. Remove the mounting bracket from the base.
Position the screw slots on the mounting bracket
over the screws in the junction box. Tighten the
screws.
2. Strip off about 1/2” of the plastic coating on the
violet interconnect wire on the power connector.
15
8. If the red power indicator light does not light,
TURN OFF POWER TO THE JUNCTION BOX
and recheck all connections. If all connections are
correct and the red power indicator still does not
light when you restore the power, the unit should
be replaced immediately.
9. Test each CO Alarm. Press and hold the test
button until the unit alarms: 4 beeps, pause,
4 beeps, pause.
5. Plug the power connector into
the back of the CO Alarm.
6. Position the base of the
Alarm over the mounting
bracket so display is rotated
approximately 30º left of
center. Turn the unit clock-
wise (right) until display is
horizontal and the unit is in
place.
30˚
WALL MOUNTING:
1. Position the junction box face
plate so screw holes are posi-
tioned as shown at right.
7. Make sure CO Alarm is
2. Remove mounting bracket
secured to the mounting bracket.
from the base. Position the
Enlarged view
screw slots on the mounting
bracket over the screws in the
junction box. Tighten the
screws.
ELECTRICAL SHOCK HAZARD. Do not restore
power until the CO Alarm is completely installed.
Restoring power before installation is complete may
result in serious electrical shock, injury or death.
3. Strip off about 1/2” of the
plastic coating on the violet
interconnect wire on the power connector.
8. Make sure each unit is receiving AC power. Under
normal operation, the red light (LED) will shine con-
tinuously. Display shows a dash under “READY”.
4. Using wire nuts, connect the power connector to
the AC power.
• Connect the white wire on the power connector
to the neutral wire (usually white) in the junction
box.
9. If the red power indicator light does not light,
TURN OFF POWER TO THE JUNCTION BOX
and recheck all connections. If all connections are
correct and the red power indicator still does not
light when you restore the power, the unit should
be replaced immediately.
• Connect the black wire on the power connector
to the hot wire (usually black) in the junction
box.
• Connect the violet wire on the power connec-
tor to the interconnect wire in the junction box.
Repeat for each unit you are interconnecting.
Never connect the hot or neutral wires in the
junction box to the violet interconnect wire.
10. Test each CO Alarm. Press and hold the test
button until the unit alarms: 4 beeps, pause,
4 beeps, pause.
16
ACTIVATING THE BATTERY BACK-UP
In a series of interconnected Alarms, you must test
each Alarm separately by pressing and holding the
test button. Make sure all units alarm when each
one is tested.
Activate the battery back-up by remov-
ing the “Pull to Activate Battery Back-
Up” tab. You do not need to open the
battery compartment and reposition
the battery during installation.
DO NOT remove the battery activation tab until AC
power is turned on to conserve battery power.
If any unit in the series does not alarm during testing,
TURN OFF POWER and recheck connections. If it does
not alarm when you restore power, replace it immediately.
Test the alarm. Press and hold the test button on the
cover until the alarm sounds:
4 beeps, pause, 4 beeps, pause.
CHAPTER 3: IF YOUR CO ALARM SOUNDS
(Do not remove or disconnect the alarm!)
Actuation of your CO Alarm indicates the presence
of carbon monoxide (CO) which can kill you. When
your CO Alarm sounds, you must not ignore it!
4. After following steps 1-3, if your CO Alarm reacti-
vates within a 24-hour period, repeat steps 1-3
and call a qualified appliance technician to
investigate for sources of CO from fuel-burning
equipment and appliances, and inspect for proper
operation of this equipment. If problems are iden-
tified during this inspection have the equipment
serviced immediately. Note any combustion equip-
ment not inspected by the technician, and consult
the manufacturers’ instructions, or contact the
manufacturers directly, for more information about
CO safety and this equipment. Make sure that
motor vehicles are not, and have not, been operat-
ing in an attached garage or adjacent to the resi-
dence. Write down the number of a qualified appli-
ance technician here:
IF THE ALARM SOUNDS:
1. Operate the Test/Silence button to silence the alarm.
2. Call your emergency services, fire department
or 911. Write down the number of your local
emergency service here:
________________________________________
3. Immediately move (everyone) to fresh air—out-
doors or by an open door or window. Do a head
count to check that all persons are accounted for.
Do not re-enter the premises, or move away from
the open door or window until the emergency
services responder has arrived, the premises have
been aired out, and your CO Alarm remains in its
normal condition.
_______________________________________
17
Display Shows...
It Means...
USING THE SILENCE FEATURE
30
Developing CO problem. Display will
only show levels of carbon monoxide
30 ppm or higher.
(or higher)
NEVER disconnect the power to your CO Alarm
to silence the horn—use the silence feature.
Disconnecting the CO Alarm removes your
protection! See previous page for details on
responding to an alarm.
70
The unit is calibrated to sound an alarm
before 240 minutes have passed when
exposed to this level.
(or higher)
150
(or higher)
The unit is calibrated to sound an alarm
before 50 minutes have passed when
exposed to this level. At this level, an
average healthy adult may feel a
headache within 90 minutes.
The Silence feature is intended to temporarily silence
your CO Alarm’s alarm horn while you correct the
problem—it will not correct a CO problem. While the
alarm is silenced, it will continue to monitor the air for
CO. When CO reaches the “Alarm” level, it will
sound— repeating horn pattern: 4 beeps, a pause, 4
beeps, etc. Press and hold the Test/Silence button
until the horn is silent. The Silence cycle will last
approximately 4 minutes.
400
(or (higher)
The unit is calibrated to sound an alarm
before 15 minutes have passed when
exposed to this level. This level may be
life threatening to a normal healthy
adult within three hours.
A number higher Over 450 ppm has been detected.
than 450 Evacuate immediately!
To silence an interconnected series of Alarms, you
must press the Test/Silence button on the initiating
alarm (the unit with the flashing red light). If you press
the Test/Silence on any other Alarm, it will only
silence that unit, not the whole interconnected series.
NOTE: After the 4-minute silence cycle, the CO Alarm
re-evaluates present CO levels and responds accord-
ingly. If CO levels remain potentially dangerous—or
start rising higher—the horn will start sounding again.
While the CO Alarm is silenced:
If the CO Alarm...is silent for only 4 minutes, then starts
sounding loudly—4 beeps, then a pause, 4 beeps, then
a pause. Red light (LED) continues flashing...
This means...CO levels are still potentially dangerous.
If the CO Alarm...remains silent....
This means...unit has returned to normal operation.
18
FINDING THE SOURCE OF CO AFTER AN ALARM
Because CO may dissipate by the time an investigator arrives, it may be difficult to locate the source of CO. See
Chapter 5 “What You Need to Know About CO.” BRK Brands, Inc. shall not be obligated to pay for any carbon
monoxide investigation or service call.
THE “LATCHING ALARM” INDICATOR:
KEY:
LATCHING ALARM:
Unit was exposed
to alarm levels of CO
BEDROOM
BEDROOM
GARAGE
BEDROOM
KITCHEN
LATCHING NOT ACTIVATED:
Unit was not exposed
to alarm levels of CO
HALL
LIVING ROOM
BASEMENT
The Latching Alarm Indicator is activated after a
CO Alarm is exposed to alarm levels of carbon
monoxide. After CO levels drop below alarm levels,
the red LED will begin to flash once every 5 seconds.
It will continue to flash or “latch” until you clear it by
pressing the test button.
Interconnected Alarms
Latching Alarm Indicator shows which Alarm(s) in
the series were exposed to alarm levels of carbon
monoxide.
The Latching Alarm Indicator stays ON until you clear
it, so it can alert you to a CO Alarm that occurred
while you were away from home, even though CO
present in the air has dropped below alarm levels.
This feature helps emergency responders, investiga-
tors, or service technicians identify which unit(s) in
your home were exposed to alarm levels of carbon
monoxide. This can help investigators pinpoint the
source of CO.
19
CHAPTER 4: TESTING AND MAINTENANCE
THE LOW (OR MISSING) BATTERY WARNING:
WEEKLY TESTING
Push and hold the Test/Silence button until a loud
alarm sounds— 4 beeps, pause, 4 beeps. This
sequence should last for 10 seconds. If the Alarm ever
fails to test properly, replace it immediately. If the Alarm
is not working properly, refer to “Limited Warranty”.
The horn will “chirp” once a
minute and the word “bat” will
flash on and off on the display.
NOTE: You should replace the battery immediately to
continue your protection.
•
Test/Silence button is the only proper way to
test the CO Alarm. NEVER use vehicle exhaust!
Exhaust may cause permanent damage and
voids your warranty.
LOW BATTERY SILENCE FEATURE. If AC power is on,
press the Test/Silence button to silence the low battery
“chirp” for up to 8 hours. The alarm will continue to
operate as long as AC power is supplied. However,
replace the battery as soon as possible, to maintain
protection in event of a power outage.
Choosing a replacement battery: This unit requires
one standard 9V alkaline battery. The following alkaline
batteries are acceptable as replacements. This list sup-
plements the list on the carbon monoxide alarm battery
door: Eveready #522 (Energizer); Duracell #MN1604,
MX1604 (Ultra). You may also use a Lithium battery like
an Ultralife U9VL-J for longer service between battery
changes. These batteries are available at many local
retail stores. Replacement batteries are commonly
available at local retail stores.
• DO NOT stand close to the Alarm when the
horn is sounding. Exposure at close range
may be harmful to your hearing. When test-
ing, step away when horn starts sounding.
REGULAR MAINTENANCE
To keep the CO Alarm in good working order:
• Test it every week using the Test/Silence button.
• Vacuum the CO Alarm cover at least twice a
year, using the soft brush attachment. Test the
alarm again after vacuuming.
Household cleaners, aerosol chemicals and other con-
taminants can affect sensor. When using any of these
materials near Alarm, make sure room is well ventilated.
Use only the alkaline or lithium replacement batteries
listed. The unit may not operate properly with other
batteries. Never use rechargeable batteries since they
may not provide a constant charge.
DO NOT spray cleaning chemicals or insect sprays
directly on or near the Alarm. DO NOT paint over the
Alarm, this may permanently damage the Alarm. DO
NOT expose the Alarm to strong fumes such as
painting or fumigating.
Disconnect AC power before changing battery.
Shock hazard exists if AC power is miswired.
20
CHAPTER 5: WHAT YOU NEED TO KNOW ABOUT CO
WHAT IS CO?
CO is an invisible, odorless, tasteless gas produced
when fossil fuels do not burn completely, or are
exposed to heat (usually fire). Electrical appliances
typically do not produce CO.
Some individuals are more sensitive to CO
than others, including people with cardiac or
respiratory problems, infants, unborn babies,
pregnant mothers, or elderly people can be more
quickly and severely affected by CO. Members of
sensitive populations should consult their doctors
for advice on taking additional precautions.
These fuels include:
Wood, coal, charcoal, oil, natural gas, gasoline,
kerosene, and propane.
FINDING THE SOURCE OF CO
AFTER AN ALARM
Carbon monoxide is an odorless, invisible gas, which
often makes it difficult to locate the source of CO
after an alarm. These are a few of the factors that can
make it difficult to locate sources of CO:
Common appliances are often sources of CO. If they
are not properly maintained, are improperly ventilated,
or malfunction, CO levels can rise quickly. CO is a
real danger now that homes are more energy
efficient. “Air-tight” homes with added insulation,
sealed windows, and other weatherproofing can
“trap” CO inside.
• House well ventilated before the
investigator arrives.
SYMPTOMS OF CO POISONING
These symptoms are related to CO POISONING and
• Problem caused by “backdrafting.”
should be discussed with ALL household members.
• Transient CO problem caused by
special circumstances.
Mild Exposure:
Slight headache, nausea, vomiting, fatigue (“flu-like”
BRK Brands, Inc. shall not be obligated to pay for
any carbon monoxide investigation or service call.
symptoms).
Medium Exposure:
Throbbing headache, drowsiness, confusion, fast
heart rate.
Extreme Exposure:
Convulsions, unconsciousness, heart and lung failure.
Exposure to Carbon Monoxide can cause brain dam-
age, death.
21
POTENTIAL SOURCES OF CO IN THE HOME
The following conditions can result in transient
CO situations:
1. Excessive spillage or reverse venting of fuel
appliances caused by outdoor conditions such as:
• Wind direction and/or velocity, including
high, gusty winds. Heavy air in the vent pipes
(cold/humid air with extended periods
between cycles).
• Negative pressure differential resulting from
the use of exhaust fans.
• Several appliances running at the same time
competing for limited fresh air.
• Vent pipe connections vibrating loose from
clothes dryers, furnaces, or water heaters.
• Obstructions in or unconventional vent pipe
designs which can amplify the above situations.
Fuel-burning appliances like: portable heater, gas or
wood burning fireplace, gas kitchen range or cooktop,
gas clothes dryer.
2. Extended operation of unvented fuel burning
devices (range, oven, fireplace).
3. Temperature inversions, which can trap exhaust
close to the ground.
4. Car idling in an open or closed attached garage,
or near a home.
These conditions are dangerous because they can
trap exhaust in your home. Since these conditions
can come and go, they are also hard to recreate dur-
ing a CO investigation.
Damaged or insufficient venting: corroded or dis-
connected water heater vent pipe, leaking chimney
pipe or flue, or cracked heat exchanger, blocked or
clogged chimney opening.
Improper use of appliance/device: operating a bar-
becue grill or vehicle in an enclosed area (like a
garage or screened porch).
Transient CO Problems: “transient” or on-again-off-
again CO problems can be caused by outdoor condi-
tions and other special circumstances.
22
• Check for exhaust backflow from CO sources.
Check the draft hood on an operating furnace
for a backdraft. Look for cracks on furnace heat
exchangers.
HOW CAN I PROTECT MY FAMILY?
A CO Alarm is an excellent means of protection.
It monitors the air and sounds a loud alarm before
carbon monoxide levels become threatening for
average, healthy adults.
• Check the house or garage on the other side of
shared wall.
A CO Alarm is not a substitute for proper
maintenance of home appliances.
• Keep windows and doors open slightly. If you
suspect that CO is escaping into your home,
open a window or a door. Opening windows and
doors can significantly decrease CO levels.
To help prevent CO problems and reduce the risk of
CO poisoning:
In addition, familiarize yourself with the enclosed
checklist, read this manual in its entirety, and
make sure you understand what to do if your CO
Alarm sounds.
• Clean chimneys and flues yearly. Keep them free
of debris, leaves, and nests for proper air flow.
Also, have a professional check for rust and cor-
rosion, cracks, or separations. These conditions
can prevent proper air movement and cause
backdrafting. Never “cap” or cover a chimney in
any way that would block air flow.
• Test and maintain all fuel-burning equipment
annually. Many local gas or oil companies and
HVAC companies offer appliance inspections for
a nominal fee.
• Make regular visual inspections of all fuel-burn-
ing appliances. Check appliances for excessive
rust and scaling. Also check the flame on the
burner and pilot lights. The flame should be
blue. A yellow flame means fuel is not being
burned completely and CO may be present.
Keep the blower door on the furnace closed.
Use vents or fans when they are available on all
fuel-burning appliances. Make sure appliances
are vented to the outside. Do not use
portable/outdoor grills or barbecue indoors, or in
garages or on screen porches.
23
CHAPTER 6: UNDERWRITERS LABORATORIES INC. UL2034
WHAT LEVELS OF CO CAUSE AN ALARM?
Underwriters Laboratories Inc. UL2034 defines 3
specific alarm points by which all residential CO
Alarms must alarm. They are measured in parts per
million (ppm) of CO over time (in minutes).
This CO Alarm measures exposure to CO over time. It
alarms if CO levels are extremely high in a short peri-
od of time, or if CO levels reach a certain minimum
over a long period of time. The CO Alarm generally
sounds an alarm before the onset of symptoms in
average, healthy adults.
UL2034 Required Alarm Points:
• If the Alarm is exposed to 400 ppm
of CO, IT MUST ALARM BETWEEN
4 and 15 MINUTES
Why is this important? Because you need to be
warned of a potential CO problem while you can still
react in time. In many reported cases of CO exposure,
victims may be aware that they are not feeling well,
but become disoriented and can no longer react well
enough to exit the building or get help. Also, young
children and pets may be the first affected. The
average healthy adult might not feel any symptoms
when the CO Alarm sounds. However, people with
cardiac or respiratory problems, infants, unborn
babies, pregnant mothers, or elderly people can be
more quickly and severely affected by CO. If you
experience even mild symptoms of CO poisoning,
consult your doctor immediately!
• If the Alarm is exposed to 150 ppm
of CO, IT MUST ALARM BETWEEN
10 and 50 MINUTES.
• If the Alarm is exposed to 70 ppm
of CO, IT MUST ALARM BETWEEN
60 and 240 MINUTES.
CO Alarms are designed to alarm before there is an
immediate life threat. Since you cannot see or smell
CO, never assume it’s not present.
• An exposure to 100 ppm of CO for 20 minutes
may not affect average, healthy adults, but after
4 hours the same level may cause headaches.
This product is intended for use in ordinary indoor
locations of family living units. It is not designed
to measure CO levels in compliance with
Occupational Safety and Health Administration
(OSHA) commercial or industrial standards.
• An exposure to 400 ppm of CO may cause
headaches in average, healthy adults after 35
minutes, but can cause death after 2 hours.
24
CHAPTER 7: TROUBLESHOOTING GUIDE
ELECTRICAL SHOCK HAZARD. Turn off the power to the area where the CO Alarm is installed BEFORE
removing it from the mounting bracket or checking any electrical connections! Failure to turn off the power
first may result in serious electrical shock, injury or death.
The following guide can help you identify a potential problem with the installation or operation of your CO Alarm. It
is not meant to be an all-inclusive list of all CO Alarm conditions. If you are experiencing a condition not covered in
the next several pages, please contact Consumer Affairs.
If your CO Alarm does this...
This means...
You should...
Red light is OFF. Unit will not alarm when
you press the Test/Silence button.
Unit may not be receiving any power.
Check the AC power supply. Make sure
the power connector is securely
attached to the Alarm. Make sure a
fresh 9V battery is installed to power
the battery back-up.
Red light flashes once a minute (horn is
Alarm is not receiving AC power.
Low battery warning.
Unit is operating on DC battery back-
up. Check the AC power supply.
silent). Display shows “bat”.
Once a minute, the red light flashes and
the horn “chirps” and flashing “bat”
displays continuously.
Replace the 9V battery in the battery
back-up. Disconnect AC power before
changing the battery.
Once a minute, the alarm sounds 3
quick “chirps”, and the red light flashes
quickly three times and display reads
“Err”.
Based on its Self Test diagnostics, the
unit has detected a malfunction. The
unit needs to be replaced.
Units under warranty should be
returned to manufacturer for
replacement. See “Limited Warranty”
for details.
CO Alarm goes back into alarm
4 minutes after you press the
Test/Silence button.
CO levels are still potentially dangerous.
Refer to Chapter 3 “If Your CO Alarm
Sounds” for details on how to respond to
an alarm. If anyone is feeling ill, EVACU-
ATE your home immediately and call 911.
CO Alarm sounds frequently even
though no high levels of CO are
revealed in an investigation.
The CO Alarm may be improperly
located. Refer to “Where to Install
Your CO Alarm.”
Relocate your Alarm. If frequent alarms
continue, have home rechecked for
potential CO problems. You may be
experiencing an intermittent CO problem.
If you have any questions that cannot be answered by reading this manual, call Consumer Affairs:1-800-323-9005.
25
CHAPTER 8: GENERAL LIMITATIONS OF CO ALARMS
This CO Alarm is intended for residential use. It is not intended for use in industrial applications where
Occupational Safety and Health Administration (OSHA) requirements for carbon monoxide detectors must be met.
CO Alarms will not work without power. This CO
Alarm requires a continuous supply of AC power, and
a fresh, correctly installed 9V battery to power the
battery back-up.
CO Alarms are not a substitute for a smoke alarm.
Although fire is a source of carbon monoxide, this
CO Alarm does not sense smoke or fire. This CO
Alarm senses CO that may be escaping unnoticed
from malfunctioning furnaces, appliances, or other
sources. Early warning of fire requires the installation
of smoke alarms.
This CO Alarm will not sense carbon monoxide
that does not reach the sensor. This CO Alarm will
only sense CO at the sensor. CO may be present in
other areas. Doors or other obstructions may affect
the rate at which CO reaches the CO Alarm. For this
reason, if bedroom doors are usually closed at night,
we recommend you install a CO Alarm in each bed-
room and in the hallway between them.
CO Alarms are not a substitute for life insurance.
Though these CO Alarms warn against increasing
CO levels, BRK Brands, Inc. does not warrant or
imply in any way that they will protect lives from
CO poisoning. Homeowners and renters must still
insure their lives.
CO Alarms may not sense CO on another level of
the home. For example, a CO Alarm on the second
level, near the bedrooms, may not sense CO in the
basement. For this reason, one CO Alarm may not
give adequate warning. Complete coverage is recom-
mended. Place CO Alarms on each level of the home.
CO Alarms have a limited life. Although the CO
Alarm and all of its parts have passed many stringent
tests and are designed to be as reliable as possible,
any of these parts could fail at any time. Therefore,
you must test your CO Alarm weekly.
CO Alarms may not be heard. The Alarm horn loud-
ness meets or exceeds current UL standards of 85 dB
at 10 feet. However, if the CO Alarm is installed out-
side the bedroom, it may not wake up a sound sleep-
er or one who has recently used drugs or has been
drinking alcoholic beverages. This is especially true if
the door is closed or only partly open. Even persons
who are awake may not hear the alarm horn if the
sound is blocked by distance or closed doors. Noise
from traffic, stereo, radio, television, air conditioner, or
other appliances may also prevent alert persons from
hearing the alarm horn. This CO Alarm is not intended
for people who are hearing impaired.
CO Alarms are not foolproof. Like all other electron-
ic devices, CO Alarms have limitations. They can only
detect CO that reaches their sensors. They may not
give early warning to rising CO levels if the CO is
coming from a remote part of the home, away from
the CO Alarm.
26
27
LIMITED WARRANTY
Coverage: BRK Brands, Inc. ("BRK")
hibited by applicable law, any implied warranty of
merchantability or fitness for a particular purpose is
limited in duration for to the duration of the above
warranty. Some states, provinces, or jurisdictions do
not allow the exclusion or limitation of incidental or
consequential damages or limitations on how long an
implied warranty lasts, so the above limitations or
exclusion may not apply to you. This warranty gives
you specific legal rights, and you may also have other
rights that vary from state to state, or province to
province.
the maker of BRK Electronics® brand
products, warrants that for a period of
5 years from the date of purchase,
this product will be free from defects
in material and workmanship. BRK, at
its option, will repair or replace this product or any
component of the product found to be defective dur-
ing the warranty period. Replacement will be made
with a new or remanufactured product or component.
If the product is no longer available, replacement may
be made with a similar product of equal or greater
value This is your exclusive warranty.
How to Obtain Warranty Service:
Service: If service is required, do not return the prod-
uct to your retailer. In order to obtain warranty service,
contact the Consumer Affairs Division at 1-800-323-
9005, 7:30 AM to 5:00 PM, Central Standard Time,
Monday through Friday. To assist in serving you,
please have the model number and date of purchase
available when calling.
This warranty is valid for the original retail purchaser
from the date of initial retail purchase and is not
transferable. Keep the original sales receipt. Proof of
purchase is required to obtain warranty performance.
BRK dealers, service centers, or retail stores selling
BRK products do not have the right to alter, modify
or any way change the terms and conditions of this
warranty.
3920 Enterprise Court, Aurora, IL 60504-8132.
Battery: BRK Brands, Inc. make no warranty, express
or implied, written or oral, including that of mer-
chantability or fitness for any particular purpose with
respect to battery.
This warranty does not cover normal wear of parts or
damage resulting from any of the following: negligent
use or misuse of the product, use on improper voltage
or current, use contrary to the operating instructions,
disassembly, repair or alteration by anyone other than
BRK or an authorized service center. Further, the war-
ranty does not cover acts of God, such as fire, flood,
hurricanes and tornadoes or any batteries that are
included with this unit.
Please record Date and Where Purchased:
_____________________________________________
BRK shall not be liable for any incidental or conse-
quential damages caused by the breach of any
express or implied warranty. Except to the extent pro-
BRK Electronics® is a registered trademark
of BRK Brands, Inc.
M06-1060-000 08/01
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