Kidde 900-CUDR-V User manual

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User Guide
Combination Photoelectric
Smoke & Carbon Monoxide Alarm
with Voice
Model 900-CUDR-V
AA BATTERY
SELFTESTING SEE SECTION 10
VOICE MESSAGE SYSTEM
COMBINATION ALARM
P/N: 900-7205-00 Rev. A

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Thank You for Purchasing this Kidde Alarm
This model is powered by two replaceable AA batteries. It also contains a voice message system and
HushTM to temporarily silence nuisance alarms, and “self-testing” features (see section 10).
Teach children how to respond to the alarm and that they should never play with the unit. This alarm is a
multi-criteria device designed to detect both smoke and carbon monoxide from any source of combustion in
a residential environment. It is not designed for use in a recreational vehicle (RV) or boat.
NOTE: Please thoroughly read this user guide and save the document for future reference and to pass on
to any subsequent owner. Images are representative only. Actual product may vary slightly.
The National Fire Protection Association (NFPA) and the manufacturer recommend replacing this alarm
ten years from the date code on back of alarm.
Date Code (on back): ___________________
Date of Purchase: ___________________
Where Purchased: ___________________
Date to Replace: ___________________
Product Support: 1-800-880-6788
Please write down the below information
and have this at hand when you call.

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Contents
1. Smoke Alarm: What To Do When The Alarm Sounds . . . . . . . . . . . . 4
2. Carbon Monoxide Alarm: What To Do When The Alarm Sounds . . . . . . . . 5
3. Other Alarm Visual And Audible Indicators . . . . . . . . . . . . . . . 6
4. Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . 7
5. Introduction, Product Features And Specifications . . . . . . . . . . . . . 8
6. Limitations Of Smoke And Carbon Monoxide Alarms . . . . . . . . . . . . 9
7. Recommended Locations For Smoke And Carbon Monoxide Alarms . . . . . . 11
8. Locations To Avoid. . . . . . . . . . . . . . . . . . . . . . . . . 14
9. Installation and Activation . . . . . . . . . . . . . . . . . . . . . . 15
10. Operation And Testing . . . . . . . . . . . . . . . . . . . . . . . 16
11. Recognizing Nuisance Alarms . . . . . . . . . . . . . . . . . . . . 17
12. Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
13. General Carbon Monoxide (CO) Information . . . . . . . . . . . . . . 19
14. Cleaning Your Alarm. . . . . . . . . . . . . . . . . . . . . . . . 21
15. Good Safety Habits . . . . . . . . . . . . . . . . . . . . . . . . 22
16. Service And Warranty . . . . . . . . . . . . . . . . . . . . . . . 25

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1. Smoke Alarm: What To Do When The Alarm Sounds
The smoke alarm pattern is three long beeps with voice “Fire!,” a 1.5 second pause, and three long beeps repeating.
The red LED blinks in time with the alarm pattern.
The smoke alarm takes precedence when both smoke and carbon monoxide are present.
•Alert small children in the home as well as anyone else that might have difficulty recognizing the
importance of the alarm sounding or that might have difficulty leaving the area without help.
•Plan two ways out! Leave immediately by your escape plan. Don’t waste time getting dressed or picking up
valuables.
•While leaving, don’t open any inside door without first feeling its surface. If hot, or if you see smoke seeping
through cracks, don’t open that door! Instead, use your alternate exit. If the inside of the door is cool, place
your shoulder against it, open it slightly and be ready to slam it shut if heat and smoke rush in.
•If the escape route requires you to go through smoke, stay close to the floor where the air is cleaner.
Crawl if necessary, and breathe shallowly through a cloth, wet if possible.
•Once outside, go to your selected meeting place and make sure everyone is there.
•Call the fire department or 911 from your cell phone outside, or from your neighbor’s home-not from yours!
•Don’t return to your home until the fire officials say that it is all right to do so.
NOTE: See Section RECOGNIZING NUISANCE ALARMS, for nuisance alarm situations.

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2. Carbon Monoxide Alarm: What To Do When The Alarm Sounds
The carbon monoxide (CO) alarm pattern is four quick beeps with voice “Warning! Carbon Monoxide”
repeating every 5 seconds. The red LED blinks in time with the alarm pattern. After 4 minutes in CO alarm
the alarm pattern will only occur every 60s.
WARNING: ACTUATION OF YOUR CO ALARM INDICATES THE PRESENCE OF CARBON
MONOXIDE CO WHICH CAN KILL YOU. IF ALARM SIGNAL SOUNDS:
1 Operate the Test/HushTM button. NOTE: Pressing the button on the alarming unit will silence the
alarm notification. If the unit goes into alarm mode again within six minutes, it is sensing high levels of
CO which can quickly become a dangerous situation.
2 Call your emergency services (Fire Department or 911). EMERGENCY PHONE #:___________
3 Immediately move to fresh air—outdoors or by an open door / window. Do a head count to check
that all persons are accounted for. Alert small children in the home as well as anyone else that might
have difficulty recognizing the importance of the alarm sounding or that might have difficulty leaving
the area without help. Do not reenter the premises or move away from the open door/window until the
emergency services responders have arrived, the premises have been aired out, and your alarm remains
in its normal condition.
4 After following steps 1-3, if the alarm reactivates within a 24 hour period, repeat steps 1-3 and call a
qualified appliance technician to investigate sources of CO from fuel burning equipment and appliances,
and to inspect for proper operation of equipment.
If problems are identified during this inspection, have the equipment serviced immediately. Note any
combustion equipment not inspected by the technician and consult the manufacturer’s instructions,
or contact the manufacturer directly for more information about CO safety and the equipment. Make
sure that motor vehicles are not, or have not been, operating in a garage attached or adjacent to the
residence. Never restart the source of a CO problem until it has been corrected. Never ignore the sound
of the alarm!
NOTE: See Section RECOGNIZING NUISANCE ALARMS, for nuisance alarm situations.

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3. Other Alarm Visual And Audible Indicators
Operational Mode Visual Indications Audible Indications Action/Note
Normal (standby) Green LED blinks approx every
60 sec.
Test (button press when
no alarm condition is
present)
(Note: Test is very loud,
stand a few feet away.)
Red LED blinks in time with
alarm pattern.
• Single beep.
• 3 long beeps, voice “Fire!,”
3 long beeps, 4 quick beeps,
voice “Warning, Carbon Monoxide,”
4 quick beeps.
Perform button press once a week to
verify proper alarm operation.
Smoke or CO Alarm
Memory (unit has
experienced a smoke or
CO alarm event, or has
detected 100ppm CO or
greater.)
Smoke: Red LED blinks
every 15 sec.
CO: 2 red LED blinks
every 15 sec.
After button push, voice ““Caution,
carbon monoxide previously
detected.”
(If CO was detected. No voice for
smoke alarm memory)
NOTE: Alarm memory is only retained
for 24 hrs.
Push button to clear Alarm Memory.
Smoke Alarm HushTM
Mode
Red LED blinks every 2 sec. After button push, voice “Hush
Mode Activated.” Smoke alarm
pattern stops. (If there is too much
smoke to allow HushTM, smoke alarm
pattern continues.)
Voice “Hush mode cancelled”
if button pushed again during
HushTM.
This feature is to be used only when
a known alarm condition, such as
smoke from cooking, activates the
alarm.
Push button during HushTM to clear
HushTM and perform a test.
CO Alarm Reset None. After button push: CO alarm pattern
stops.
Unit is conrming if CO is present or
if it experienced a nuisance situation.
Re-alarm means danger. Move to fresh
air and call 911.

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4. Troubleshooting Guide
3. Other Alarm Visual And Audible Indicators
If you require further information please contact Product Support at 1-800-880-6788 or write us at:
Kidde, 1016 Corporate Park Drive, Mebane, NC 27302. Our internet address is www.kidde.com.
Trouble Condition Visual Indications Audible Indications Action
Low Battery Amber LED blinks every
60 sec.
Chirp and voice “Low Battery” every
60 sec. (After 1 hour, voice occurs only
once every 15 mins)
* Push button once to silence for 24 hrs.
(Pushbutton again to clear HushTM and
perform a test.)
Note: 7 days after Low Battery begins, the
notications cannot be silenced.
* Replace batteries as soon as possible.
Photo Fault Amber LED blinks every
60 sec.
3 chirps every 60 sec. * See Cleaning Your Alarm section.
* Push button once to attempt to reset the unit.
* If error continues, remove alarm,
dispose unit, and replace as soon as possible.
CO Fault Amber LED blinks 2 times
every 60 sec.
3 chirps every 60 sec. * Push button once to attempt to reset the unit.
* If error continues, remove alarm, dispose unit,
and replace as soon as possible.
Memory Fault Amber LED blinks 3 times
every 60 sec.
3 chirps every 60 sec. * Push button once to attempt to reset the unit.
* If error continues, remove alarm, dispose unit,
and replace as soon as possible.
End of Unit Life Amber LED blinks 2 times
every 60 sec.
2 chirps every 60 sec.
Voice “Hush mode activated”
after button push (rst 7 days
only).
* Push button once to silence for 24 hrs. (Push
button again to clear HushTM and perform
a test.)
Note: 7 days after End of Unit Life begins, the
notications cannot be silenced.
* Remove alarm, dispose unit, and replace as
soon as possible.
MCU Failure None Constant Tone * Remove alarm, dispose unit, and replace as soon
as possible.
Stuck Button Amber LED blinks 4 times
every 60 sec.
3 chirps every 60 sec. * Push button to dislodge it from being stuck.
If button cannot be unstuck, remove alarm,
dispose unit, and replace as soon as possible.

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5. Introduction, Product Features And Specifications
Introduction
This alarm detects products of combustion using a photoelectric sensor and carbon monoxide using an electro-
chemical cell. Many times throughout this User Guide, we will refer to Carbon Monoxide as “CO.”
Ten (10) years after the unit was installed, this unit will automatically alert you that it is time to replace the unit.
This is called “End of Unit Life” mode. See Troubleshooting Guide. To help identify the date to replace the unit, a
label has been affixed to the side of the alarm. Write the “Install date” in the space provided, and then write in
the “Replace by” date (10 years from initial power up) in permanent marker on the label prior to installing the unit.
Two labels have been provided that have important information on what to do in case of a CO alarm. Place one
label at eye level on a wall near the alarm after it is mounted, and one near a fresh air source such as a door or
window.
Product Features and Specifications:
•Temperature Operating Range: 40°F (4.4°C) to 100°F (37.8°C)
•Humidity Operating range: 10-95% RH non-condensing
•Audible Alarm: 85+ dB at 10’, 3.0 to 3.5 KHz pulsing alarm, with voice messages “Fire!” and/or
“Warning! Carbon Monoxide”
•Smoke Sensor: Photoelectric
•CO Sensor: Electrochemical
•Smoke Alarm Hush TM
•Powered by two AA batteries.
•Self-testing (see section 10)
•Voice message system

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6. Limitations Of Smoke And Carbon Monoxide Alarms
WARNING: PLEASE READ CAREFULLY AND THOROUGHLY
•Life safety from fire in residential occupancies is based primarily on early notification to occupants of the need to
escape, followed by the appropriate egress actions by those occupants.
•There are situations where a smoke alarm may not be effective to protect against fire as stated in the NFPA
Standard 72. For instance:
a) smoking in bed
b) leaving children home alone
c) cleaning with flammable liquids, such as gasoline
•Fire warning systems for dwelling units are capable of protecting about half of the occupants in potentially fatal
fires. A smoke alarm may not be effective in some situations, such as during incendiary fires where the fire grows so
rapidly that an occupant’s egress is blocked even with properly located smoke alarms, or when victims are intimate
with the fire (for example, when a person’s clothes catch fire while cooking), too old or young, or physically or
mentally impaired such that they cannot escape even when warned early enough that escape should be possible.
For these people, additional strategies such as protection-in-place or assisted escape or rescue are necessary. *
•Leading authorities recommend that both ionization and photoelectric smoke alarms be installed to help ensure
optimal detection of the various types of fires that can occur within the home. Ionization sensing alarms may
detect invisible fire particles (associated with fast flaming fires) sooner than photoelectric alarms. Photoelectric
sensing alarms may detect visible fire particles (associated with slow smoldering fires) sooner than ionization
alarms.
•A battery powered alarm must have a battery of the specified type, in good condition and installed properly (this
model includes two AA replaceable batteries.)
•Smoke alarms must be tested regularly to make sure the battery and the alarm circuits are in good operating
condition.
•Smoke alarms cannot provide an alarm if smoke does not reach the alarm. Therefore, smoke alarms may not sense
fires starting in chimneys, within walls, on roofs, on the other side of a closed door or other obstruction.
•If the alarm is located outside the bedroom or on a different floor, it may not wake up a sound sleeper.
•The use of alcohol or drugs may also impair one’s ability to hear the smoke alarm. For optimal detection, a smoke
alarm should be installed in each sleeping area on every level of a home.
This alarm is not intended to alert hearing impaired individuals.
* Reference National Fire Protection Association (NFPA) standard 72

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WARNING: PLEASE READ CAREFULLY AND THOROUGHLY
•IMPORTANT: This alarm is designed to detect carbon monoxide gas from ANY source of combustion. It is
NOT designed to detect any other gas.
CAUTION: This alarm will only indicate the presence of carbon monoxide gas at the sensor. Carbon
monoxide gas may be present in other areas. Never restart the source of a CO problem until it has been
fixed. NEVER IGNORE THE ALARM!
WARNING: THIS PRODUCT IS INTENDED FOR USE IN ORDINARY INDOOR LOCATIONS OF
FAMILY LIVING UNITS. IT IS NOT DESIGNED TO MEASURE COMPLIANCE WITH OCCUPATIONAL
SAFETY AND HEALTH ADMINISTRATION OSHA COMMERCIAL OR INDUSTRIAL STANDARDS. IT
IS NOT SUITABLE FOR INSTALLATION IN HAZARDOUS LOCATIONS AS DEFINED IN THE NATIONAL
ELECTRIC CODE. IT IS NOT DESIGNED FOR USE IN A RECREATIONAL VEHICLE RV OR BOAT.
•The installation of this device should not be used as a substitute for proper installation, use, and
maintenance of fuel burning appliances, including appropriate ventilation and exhaust systems.
•This alarm does not prevent CO from occurring, nor can it solve any existing CO problem.
WARNING: THIS DEVICE IS DESIGNED TO HELP PROTECT INDIVIDUALS FROM ACUTE EFFECTS
OF CARBON MONOXIDE EXPOSURE. IT WILL NOT FULLY SAFEGUARD INDIVIDUALS WITH
SPECIFIC MEDICAL CONDITIONS. IF IN DOUBT, CONSULT A MEDICAL PRACTITIONER.
INDIVIDUALS WITH MEDICAL PROBLEMS MAY CONSIDER USING WARNING DEVICES WHICH
PROVIDE AUDIBLE AND VISUAL SIGNALS FOR CARBON MONOXIDE CONCENTRATIONS
UNDER 30 PPM. *
•This alarm has not been investigated for carbon monoxide detection below 70 PPM.
•This device requires a continuous supply of electrical power from a healthy battery or AC connection,
depending on the model. It will not work without power.
* Reference Underwriters Laboratories (UL) standard 2034

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7. Recommended Locations For Smoke And Carbon Monoxide
Alarms
•Locate smoke alarms in all sleeping areas. Try to monitor the exit path as the bedrooms are usually farthest
from the exit. If more than one sleeping area exists, locate additional alarms in each sleeping area.
•Locate additional alarms in stairways, because stairways act like chimneys for smoke and heat.
•Locate at least one alarm on every floor level.
•Locate an alarm in every bedroom.
•Locate an alarm in every room where electrical appliances are operated (i.e. portable heaters or humidifiers).
•Locate an alarm in every room where someone sleeps with the door closed. The closed door may prevent
an alarm not located in that room from waking the sleeper.
•Smoke, heat, and combustion products rise to the ceiling and spread horizontally. Mounting the smoke
alarm on the ceiling in the center of the room places it closest to all points in the room. Ceiling mounting is
preferred in ordinary residential construction.
•For all alarm locations, be sure to choose a flat, solid surface for mounting, with no holes or gaps under the
mounting bracket.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.
Not within 6 feet of appliances
Smoke Alarms for Required Detection
Smoke Alarms for Additional Detection
Figure 7-A
ACCEPTABLE
TOP OF DETECTOR
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the detector.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.

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ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.
Not within 6 feet of appliances
Smoke Alarms for Required Detection
Smoke Alarms for Additional Detection
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.
Not within 6 feet of appliances
Smoke Alarms for Required Detection
Smoke Alarms for Additional Detection
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.
Not within 6 feet of appliances
Smoke Alarms for Required Detection
Smoke Alarms for Additional Detection
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.
Not within 6 feet of appliances
Smoke Alarms for Required Detection
Smoke Alarms for Additional Detection
NFPA 72 states: “Smoke alarms in rooms with ceiling slopes greater than 1 ft in 8 ft (0.3m in 2.4 m) horizontally
shall be located on the high side of the room.” NFPA 72 states: “A row of detectors shall be spaced and located
within 3 ft (0.9m) of the peak of the ceiling measured horizontally.”
Figure 7-B Figure 7-C

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•For mobile home installation, select locations carefully to avoid thermal barriers that may form at the ceiling.
For more details, see MOBILE HOME INSTALLATION section.
•When mounting the alarm on the wall, use an inside wall with the top edge of the alarm at a maximum
of 12” (30.5 cm) below the ceiling.
•Put smoke alarms at both ends of a bedroom hallway or large room if the hallway or room is more than 30
feet (9.1 m) long.
•Install Smoke Alarms on sloped, peaked or cathedral ceilings at or within 3ft (0.9m) of the highest point
(measured horizontally).
•Industry experts recommend a CO alarm be installed on each level of the home-ideally on any level with
fuel burning appliances and outside of sleeping areas.
This equipment should be installed in accordance with the National Fire Protection Association’s 72 (National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269).
Mobile Home Installation
Modern mobile homes have been designed and built to be energy efficient. Install smoke alarms as recom-
mended above. In older mobile homes that are not well insulated compared to present standards, extreme heat
or cold can be transferred from the outside to the inside through poorly insulated walls and roof. This may create
a thermal barrier which can prevent the smoke from reaching an alarm mounted on the ceiling. In such units,
install the smoke alarm on an inside wall with the top edge of the alarm a maximum of 12” (30.5 cm) below the
ceiling.
If you are not sure about the insulation in your mobile home, or if you notice that the outer walls and ceiling are
either hot or cold compared to the room air temperature, install the alarm on an inside wall. NFPA 72 (National
Fire Protection Association) requires smoke alarms be installed in each sleeping area.
WARNING: TEST YOUR ALARM OPERATION AFTER MOBILE HOME HAS BEEN IN STORAGE OR
UNOCCUPIED, AND AT LEAST ONCE A WEEK DURING USE.

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8. Locations To Avoid
(See Figures 7-A, 7-B, & 7-C for recommended locations)
•In the garage. Products of combustion are present when you start your automobile.
•Normal cooking may cause nuisance alarms. If a kitchen alarm is desired, it should have an alarm silence
feature and should not be installed within 6 ft of cooking appliances.
•Do not install within 6 ft of heating appliances.
•Less than 4” (10cm) from the peak of an “A” frame type ceiling.
•In an area where the temperature may fall below 40ºF or rise above 100ºF, such as garages and unfinished
attics.
•In dusty areas. Dust particles may cause nuisance alarms or a failure to alarm.
•In very humid areas (above 95% RH, non-condensing) as moisture or steam can cause nuisance alarms.
•In insect-infested areas.
•Smoke alarms should not be installed within 3 ft (0.9m) of the door to a bathroom containing a tub or
shower, forced air supply ducts used for heating or cooling, ceiling or whole house ventilating fans, or other
high air flow areas.
•Near lights. Electronic “noise” generated by the lights may cause nuisance alarms.
•Do not install near vents, flues, or chimneys.
•Do not install near fans, doors, windows or areas directly exposed to the weather.
•Do not install DC (battery only) alarms on top of AC electrical junction boxes.
•Avoid installing where the unit will be exposed to direct sunlight.

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Figure 9 -A
PULL OUT TAB TO ACTIVATE
BATTERIES.
Figure 9-B
When mounting
in a hallway,
the "A" line should
be parallel with the
hallway. When wall
mounting, the "A"
line should be
horizontal.
Alignment Marks
(”A” Line) on
Mounting
Bracket
Figure 9-C
Mark and drill
two 3/16" (5mm)
holes for wall
anchors.
Figure 9-D
Remove
Install
9. Installation and Activation
NOTE: A dust cover has been provided with this alarm. Install the
dust cover over the alarm if construction projects are ongoing. Do not
remove the dust cover until all construction has been completed for
at least 24 hours (drywall, painting, varnishing, mounting plate install,
etc). Construction dust and chemicals can cause contamination
and false alarms.
WARNING: DUST COVER MUST BE REMOVED FOR ALARM TO OPERATE.
NOTE: Pull out the battery pull tab first to activate the batteries (see Figure 9-A). Battery activation is confirmed
with a beep and voice “Push test button.” If the beep and voice do not occur when the battery pull tab is re-
moved, remove the batteries and reinstall them. Confirm the battery activation beep and voice.
•Kidde alarms are not designed, agency tested or certified for recessed mounting and should not be installed
in this manner. Recessed mounting impedes smoke entry into the smoke chamber, which may prevent the
alarm from sounding in a timely manner. This could endanger the lives of occupants in the residence. Kidde
alarms are designed, tested and certified for wall (if applicable) and ceiling surface mount only.
•After selecting the proper location for your alarm, attach the mounting bracket to the wall or ceiling. To
ensure aesthetic alignment of the alarm with the hallway, or wall, the “A” line on the mounting bracket should
be parallel with the hallway when ceiling mounted, or horizontal when wall mounted (Figures 9-B and 9-C)
•Install the alarm fully on the mounting bracket by rotating the alarm in a clockwise direction(Figure 9-D).
NOTE: The alarm will mount to the bracket in 4 positions (every 90 degrees).
The alarm is now activated! After installation /activation, test your alarm as described in Operation and Testing section.
WARNING: FAILURE TO PROPERLY INSTALL AND ACTIVATE THIS ALARM WILL PREVENT
PROPER OPERATION OF THIS ALARM AND WILL PREVENT ITS RESPONSE TO FIRE HAZARDS.

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10. Operation And Testing
Operation
Testing
IMPORTANT: Retail canned smoke products vary by manufacturer and produce inconsistent results. If the unit
does not alarm when canned smoke is applied conduct a push-to-test to verify proper operation. Over-applica-
tion of canned smoke can permanently damage the alarm.
Self-Testing
This model is equipped with internal, self-testing components that are always checking to ensure the device
is operating as expected. (Weekly manual testing is still required. See below.) If the device is not operating as
expected, a fault signal will be generated. (see troubleshooting guide)
Manual Testing
Test your alarm weekly by pressing and releasing the button quickly. A quick beep will confirm the button has
been pushed followed by the test sequence. See Other Alarm Visual and Audible Indicators table. The alarm and
voice will sound if the electronic circuitry, horn, speaker, and batteries are working. If the alarm or voice does not
sound, or gives erratic or low volume sound, the unit must be replaced.
WARNING: DUE TO THE LOUDNESS OF THE ALARM, ALWAYS STAND ABOUT 2.5 FEET AWAY
FROM THE UNIT OR USE EAR PROTECTION WHEN TESTING.
WARNING: DO NOT USE AN OPEN FLAME TO TEST YOUR ALARM, YOU COULD DAMAGE THE
ALARM OR IGNITE COMBUSTIBLE MATERIALS AND START A STRUCTURE FIRE.
Chirping
When End of Unit Life or Low Battery chirping begins, you can temporarily silence these chirps by pressing
the button.
WARNING: REPLACE UNIT AS SOON AS POSSIBLE WHEN IN END OF UNIT LIFE.
CO ALARM SENSOR RESPONSE TIMES
At 70 PPM, the unit must alarm within 60-240 minutes.
At 150 PPM, the unit must alarm within 10-50 minutes.
At 400 PPM, the unit must alarm within 4-15 minutes.
The alarm is operating once it is activated and
testing is complete (see “TESTING” below). When
products of combustion (smoke or CO) are sensed,
the unit sounds a loud alarm with voice messages.
See Sections 1 and 2 for alarm signal descriptions.
In high levels of CO, the unit will go into alarm in a
shorter period of time than at low levels of CO.

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11. Recognizing Nuisance Alarms
Smoke Nuisance
HUSHTM : If you know why the alarm is sounding, and you can verify that it is not a life threatening situation, you
can push the button on the initiating unit to silence the alarm for 8-10 minutes. If the smoke is not too dense, that
unit will silence. After the HushTM period, the smoke alarm will automatically reset and sound the alarm if particles
of combustion are still present. You can use HushTM repeatedly until the air has been cleared of the condition
causing the alarm.
NOTE: Dense smoke will override HushTM and sound a continuous alarm. If no fire is present, check to
see if one of the reasons listed in “Locations to avoid” may have caused the alarm. If a fire is discovered,
get out and call the fire department or 911.
This alarm is designed to minimize nuisance alarms. Cigarette smoke will not normally cause the unit to alarm,
unless the smoke is blown directly into the alarm. Combustion particles from cooking may set off the alarm if it
is located too close to a cooking appliance. Large quantities of combustible particles are generated from spills or
when broiling. Using the fan on a range hood which vents to the outside (non-recirculating type) will also help
prevent nuisance alarms from occurring by removing these combustible products from the kitchen.
Carbon Monoxide (CO) Nuisance
RESET: Pushing the button during CO alarm allows the unit to reset calculations and double check for the
presence of CO. If the unit re-alarms within 6 minutes, it is sensing high levels of CO which can quickly become a
dangerous situation. Move to fresh air and call 911.
WARNING : Although RESET can be used for CO alarm events, it is impossible to
determine the source of a CO alarm using sight or smell. Always consider a CO alarm event as dangerous.

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12. Batteries
This alarm is powered by two replaceable AA batteries.
NOTE: Constant exposure to high or low humidity or temperatures may reduce battery life.
WARNING: THE ALARM IS SEALED AND THE COVER IS NOT REMOVABLE!
Low Battery
This alarm is equipped with a low battery monitor circuit. If the battery capacity is nearing the point where
it can no longer provide adequate power for all alarm functions, the low battery condition will occur. See
Troubleshooting Guide. The batteries must be replaced within 7 days of the first occurrence of the “Low
Battery Warning” to provide continuous alarm detection.
Replace batteries with one of the following approved brands:
Energizer E91, Gold Peak 15A or Golden Power GLR6A.
These batteries can be purchased at your local retailer.
WARNING: Use only the batteries specified. Use of different batteries may have a detrimental effect on
the alarm. Do not mix old and new batteries. Do not mix alkaline, standard, or rechargeable batteries.
NOTE: Do not use lithium batteries in this unit. A good safety measure is to replace the batteries at least
once a year, or at the same time you change your clocks for daylight saving time. A missing or improperly
installed battery will render the unit inoperable.

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13. General Carbon Monoxide (CO) Information
Carbon monoxide (CO) is a colorless, odorless, and tasteless poison gas that can be fatal when inhaled. CO inhib-
its the blood’s capacity to carry oxygen.
Possible Sources of CO
Inside your home, appliances used for heating and cooking are the most likely sources of CO. Vehicles and other
combustion engines running in an attached garage and using a charcoal/gas grill or hibachi in an enclosed area
are all possible sources of CO. CO can be produced when burning any fossil fuel: gasoline, diesel, propane, natural
gas, oil and wood. It can be produced by any fuel-burning appliance that is malfunctioning, improperly installed,
or not ventilated correctly, such as: Furnaces/boilers, gas ranges/stoves, gas clothes dryers, water heaters, por-
table fuel burning space heaters, fireplaces, wood-burning stoves and certain swimming pool heaters. Blocked
chimneys or flues, back drafting and changes in air pressure, corroded or disconnected vent pipes, or a loose or
cracked furnace heat exchanger can also release CO into your building.
The following conditions can result in transient CO situations:
Excessive spillage or reverse venting of fuel-burning appliances caused by outdoor ambient conditions such as:
Wind direction and/or velocity, including high gusts of wind, heavy air in the vent pipes (cold/humid air with
extended periods between cycles), negative pressure differential resulting from the use of exhaust fans, simul-
taneous operation of several fuel-burning appliances competing for limited internal air, vent pipe connections
vibrating loose from clothes dryers, furnaces/boilers, or water heaters, obstructions in, or unconventional, vent
pipe designs which can amplify the above situations, extended operation of unvented fuel-burning devices
(range, oven, fireplace, etc.), temperature inversions which can trap exhaust gases near the ground, car idling in
an open or closed attached garage, or near a home.
CO Safety Tips
Every year, have the heating system, vents, chimney and flue inspected and cleaned by a qualified technician.
Always install appliances according to manufacturer’s instructions and adhere to local building codes. Most
appliances should be installed by professionals and inspected after installation. Regularly examine vents and
chimneys for improper connections, visible rust, or stains, and check for cracks in furnace heat exchangers. Verify
that the color of flame is blue on pilot lights and burners. An amber or orange flame is a sign that the fuel is not
burning completely and may be releasing CO. Teach all household members what the alarm sounds like and

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how to respond. Fire Departments, most utility companies and HVAC contractors will perform CO inspections.
Some contractors may charge for this service. It’s advisable to inquire about any applicable fees prior to having
the service performed. Kidde will not pay for, or reimburse the owner or user of this product, for any repair or
dispatch calls related to the alarm sounding.
Symptoms of CO Poisoning
Initial carbon monoxide poisoning symptoms are similar to the flu with no fever and can include dizziness,
severe headaches, nausea, vomiting and disorientation. Everyone is susceptible but experts agree that unborn
babies, pregnant women, senior citizens and people with heart or respiratory problems are especially vulnerable.
If symptoms of carbon monoxide poisoning are experienced seek medical attention immediately. CO poisoning
can be determined by a carboxyhemoglobin test.
The following symptoms are related to CARBON MONOXIDE POISONING and should be discussed
with ALL members of the household:
1. MILD EXPOSURE: Slight headache, nausea, vomiting, fatigue (often described as “Flu-like” symptoms).
2. MEDIUM EXPOSURE: Severe throbbing headache, drowsiness, confusion, fast heart rate.
3. EXTREME EXPOSURE: Unconsciousness, convulsions, cardio respiratory failure and death.
The above levels of exposure relate to healthy adults. Levels differ for those at high risk. Exposure to high levels
of carbon monoxide can be fatal or cause permanent damage and disabilities. Many cases of reported carbon
monoxide poisoning indicate that while victims are aware they are not feeling well, they become so disoriented
they are unable to save themselves by either exiting the building, or calling for assistance. Also, young children
and household pets may be the first affected. Familiarization with the effects of each level is important.