null  User manual
User’s Guide for Model KN-COSMXTR-B
Smoke and
Carbon Monoxide
• Nuisance Alarm Reduction
• Advanced Ion Fire
• Battery Operated
• 2-LED Display
• Hush®
• Peak Level Memory
For questions concerning your Smoke and Carbon Monoxide
Alarm, please call our Consumer Hotline at 1-800-880-6788.
For your convenience, write down the following information. If you call
our consumer hotline, these are the first questions you will be asked:
Alarm Model Number
(located on back of the alarm):
Date of Manufacture
(located on back of the alarm):
Date of Purchase:
Where Purchased:
ATTENTION: Please take a few minutes to thoroughly read this user’s
guide which should be saved for future reference and passed on to any
subsequent owner.
Manual P/N 820-1417 Rev. B
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating/Installation Instructions
Step 1: Installing Batteries . . . . . . . . . . . . . . . . . . .
Step 2: Installation Instructions:
A. Recommended Installation Locations . . . . . .
B. Where Not to Install . . . . . . . . . . . . . . . . . . .
C. How to Install . . . . . . . . . . . . . . . . . . . . . . . .
D. Tamper Resist Feature . . . . . . . . . . . . . . . . . .
Step 3: Testing the Alarm . . . . . . . . . . . . . . . . . . .
Step 4: Hush® Control Feature . . . . . . . . . . . . . . . .
Step 5: Peak Level Memory . . . . . . . . . . . . . . . . . .
What to do if the Alarm Sounds
Smoke Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carbon Monoxide Alarm . . . . . . . . . . . . . . . . . . . .
Alarm Response Times . . . . . . . . . . . . . . . . . . . . . .
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . .
General Alarm Maintenance . . . . . . . . . . . . . . . . .
Carbon Monoxide Safety Information
General CO Information . . . . . . . . . . . . . . . . . . . .
Possible Sources . . . . . . . . . . . . . . . . . . . . . . . . . .
CO Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symptoms of CO Poisoning . . . . . . . . . . . . . . . . . .
Fire Safety Information
Escape Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fire Prevention . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Industry Safety Standards
National Fire Protection Association . . . . . . . . . . . .
California State Fire Marshall . . . . . . . . . . . . . . . . .
Consumer Product Safety Commission . . . . . . . . .
NRC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty and Service Information . . . . . . . . . . . .
Thank you for purchasing the Kidde Combination Smoke
and Carbon Monoxide Alarm model KN-COSMXTR-B. This
alarm has a five-year limited warranty. Please take a few
minutes to thoroughly read this user’s guide, and save for
future reference. Teach children how to respond to the
alarms, and that they should never play with the unit.
Your Kidde Smoke/CO Alarm was 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.
If you have any questions about the operation or installation of your alarm, please call our toll free Consumer
Hotline at 1-800-880-6788. The guide on page 26 will help
you determine the correct location of safety products that
will help keep your home a safer place.
Product View
(Light Emitting Diode)
Alarm Sounder
Green LED
(Light Emitting Diode)
Product View
Battery Chamber
AA Battery
AA Battery
AA Battery
Battery Placement
• Permanent independent smoke and carbon monoxide
• Smoke alarm takes precedence when both smoke
and carbon monoxide are present.
• Alarm/Voice message warning system that alerts you of
the following conditions in the manner described
below, thus eliminating any confusion over which
alarm is sounding:
– FIRE: The alarm/voice pattern is three long alarm
beeps followed by the verbal warning message
“FIRE! FIRE!”. This pattern is repeated until the
smoke is eliminated. The red LED light will flash
while in alarm/voice mode.
– CARBON MONOXIDE: The alarm/voice pattern is
four short alarm beeps followed by the verbal
warning message “WARNING! CARBON
MONOXIDE!”. After four minutes the alarm/voice
pattern will sound once every minute until the
unit is reset, or the CO eliminated. The red LED
light will flash while in alarm/voice mode.
– LOW BATTERY: When the batteries are low and
need replacing the red LED light will flash and the
unit will “chirp” one time, followed by the warning
message “LOW BATTERY”. This cycle will occur once
every minute for the first hour. After the first hour
the red LED light will continue to flash every minute
accompanied by the “chirp” only sound. The voice
message “LOW BATTERY” will sound once every
fifteen minutes during the “chirp” only cycle.
This will continue for at least seven days.
• One “chirp” every 30 seconds is an indication that
the alarm is malfunctioning. If this occurs call the
Consumer Hotline at 1-800-880-6788.
• After seven (7) years of cumulative power up, this unit
will “chirp” twice every 30 seconds. This is an "operational end of life" feature which will indicate that it is time
to replace the alarm.
• Loud 85 decibel alarm
• Nuisance alarm reduction
• Advanced ion fire detection
• Oversized test button for easy activation
• Test button performs the following functions:
– Tests the units electronics and verifies proper unit
– Resets the unit during CO alarm
– Peak Level Memory (see page 16)
– Activates or Cancels Hush® Feature (see page 16)
• Mounting bracket designed for easy orientation
of the unit
• Green and red LED lights that indicate normal
operation and alarm status
– Green Light: The green LED light flashes every 30
seconds to indicate the unit is operating properly
and once every 2 seconds to indicate the unit is in
HUSH® mode. The green light also flashes before a
CO reading is taken and when any button is
– Red Light: When a dangerous level of smoke or
carbon monoxide is detected the red LED light will
flash and the corresponding alarm pattern
(depending on the source) will sound. If the unit
malfunctions, the red LED light will flash and the
unit will chirp every 30 seconds indicating a system
• Powered by three (3) AA batteries
• Battery lockout system that prohibits installation
without using three batteries
• Tamper Resist Feature that deters children and others
from removing the alarm
Smoke Alarm Features
Smoke Alarm
The smoke alarm monitors the air for products of combustion that are produced when something is burning or smoldering. When smoke particles in the smoke sensor reach a
specified concentration, the alarm/voice message warning
system will sound, and be accompanied by the flashing red
LED light. The smoke alarm takes precedence when
both smoke and carbon monoxide are present.
NFPA 72 states: 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. Fire warning systems for
dwelling units are capable of protecting about half of the
occupants in potentially fatal fires. Victims are often intimate with the fire, 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, other strategies such as protection-in-place or
assisted escape or rescue are necessary.
• Smoke alarms are devices that can provide early warn
ing of possible fires at a reasonable cost; however,
alarms have sensing limitations. 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. Home fires develop in
different ways and are often unpredictable. For
maximum protection, Kidde recommends that both
Ionization and Photoelectric alarms be installed.
• A battery powered alarm must have a battery of the
specified type, in good condition and installed properly.
• AC powered alarms (without battery backup) will not
operate if the AC power has been cut off, such as by
an electrical fire or an open fuse.
• Smoke alarms must be tested regularly to make sure
the batteries and the alarm circuits are in good
operating condition.
Carbon Monoxide Alarm Features
• Smoke alarms cannot provide an alarm if smoke does
not reach the alarm. Therefore, smoke alarms may not
sense fires starting in chimneys, walls, on roofs, on the
other side of a closed door or on a different floor.
• 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 maximum
protection, a smoke alarm should be installed in each
sleeping area on every level of a home.
• Although smoke alarms can help save lives by
providing an early warning of a fire, they are not a
substitute for an insurance policy. Home owners and
renters should have adequate insurance to protect their
lives and property.
Carbon Monoxide (CO) Alarm
The carbon monoxide (CO) alarm monitors the air for the
presence of CO. It will alarm when there are high levels of
CO present, and when there are low levels of CO present
over a longer period of time. When a CO condition matches either of these situations, the alarm/voice message warning system will sound, and be accompanied by the flashing
red LED light. The carbon monoxide sensor uses an electrochemical technology.
CAUTION: This alarm will only indicate the presence
of carbon monoxide gas at the sensor. Carbon monoxide gas may be present in other areas.
Individuals with medical problems may consider using warning devices which provide audible and visual signals for carbon monoxide concentrations under 30 ppm.
Operating and Installation Instructions
Step 1: Installing Batteries
Batteries were not installed at the factory and must
be installed for the unit to operate! Install the three (3)
AA batteries in the back of the Smoke/CO Alarm.
• The mounting plate must be removed from the back of
the unit to install batteries. To remove, hold the
mounting plate and twist counterclockwise (left).
Batteries Must Be Installed in Order Shown Below:
2 Install
1 Install
AA Battery
AA Battery
AA Battery
3 Install
• The battery polarity markings
on the bottom of the battery
compartment must be adhered to.
• Batteries must be installed in the
sequence shown. If the batteries
seem difficult to install, they’re
not being installed in the proper
• Smoke/CO Alarm will not engage to bracket unless
all three batteries are installed. Removal of any or all
batteries will render the Smoke/CO Alarm inoperative!
• After the batteries are correctly installed the unit
will beep once and the red LED light will flash. After
20-30 seconds the green LED light will flash indicating
the unit is now operational.
CAUTION: Your Smoke/CO Alarm is sealed and the
cover is NOT removable!
Operating and Installation Instructions
Step 2: Installation Instructions
A. Recommended Installation Locations:
Kidde recommends the installation of a Smoke/CO Alarm in
the following locations. For maximum protection we suggest an alarm be installed on each level of a multilevel
home, including every bedroom, hallways, finished attics
and basements. Put alarms at both ends of bedroom, hallway or large room if hallway or room is more than
30 ft. (9.1m) long. If you have only one alarm, ensure it is
placed in the hallway outside of the main sleeping area, or
in the main bedroom. Verify the alarm can be heard in all
sleeping areas.
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 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.
When mounting an alarm on the ceiling, locate it at a
minimum of 4” (10cm) from the side wall (see diagram A).
If installing the alarm on the wall, use an inside wall with
the top edge of the alarm at a minimum of 4” (10cm) and
a maximum of 12” (30.5cm) below the ceiling (see
Diagram A).
Operating and Installation Instructions
Sloped Ceiling Installation:
The following information is from the National Fire
Protection Association and is listed in Fire Code 72. Install
Smoke Alarms on sloped, peaked or cathedral ceilings at, or
within 3 ft (0.9m) of the highest point (measured horizontally). NFPA 72 states “Smoke alarms in rooms with ceiling
slopes greater than 1 ft to 8 ft (.3 m-2.4 m) horizontally
shall be located on the high side of the room”. NFPA 72
states “A row of alarms shall be spaced and located within
3 ft (0.9 m) of the peak of the ceiling measured horizontally” (See figure 2).
Operating and Installation Instructions
Mobile Homes:
Modern mobile homes have been designed and built to be
energy efficient. Install Smoke/CO alarms as recommended
above (refer to Recommended Installation Instructions and
figure 1). In older mobile homes that are not well insulated,
extreme heat or cold can be transferred from the outside to
the inside through poorly insulated walls and roof. This may
cause a thermal barrier, which can prevent smoke from
reaching an alarm mounted on the ceiling. In such mobile
homes install your Smoke/CO Alarm on an inside wall with
the top edge of the alarm at a minimum of 4 inches (10cm)
and a maximum of 12 inches (30.5cm) below the ceiling
(See figure 1). 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, install your alarm on an inside
wall ONLY!
Association, Batterymarch Park, Quincy, MA 02269).
Operating and Installation Instructions
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.
B. Where Not to Install:
Do not install in garages, kitchens, furnace rooms or
Do not install within 3 ft (.9m) of the following: The door
to a kitchen, or a bathroom that contains 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. Avoid excessively dusty, dirty or greasy areas. Dust,
grease or household chemicals can contaminate the alarm’s
sensors, causing it to not operate properly.
Place the alarm where drapes or other objects will not block
the sensors. Smoke and CO must be able to reach the sensors to accurately detect these conditions. Do not install in
peaks of vaulted ceilings, “A” frame ceilings or gabled
roofs (see diagram A). Keep out of damp and humid areas.
Operating and Installation Instructions
Install at least one (1) foot away from fluorescent lights,
electronic noise may cause nuisance alarms. Do not place in
direct sunlight and keep out of insect infested areas.
Extreme temperatures will effect the sensitivity of the
Smoke/CO Alarm. Do not install in areas where the temperature is colder than 40 degrees Fahrenheit (4.4 Celsius)
or hotter than 100 degrees Fahrenheit (37.8 Celsius), such
as garages and unfinished attics. Do not install in areas
where the relative humidity (RH) is above 85%. Place away
from doors and windows that open to the outside.
Smoke alarms are not to be used with detector guards
unless the combination (alarm and guard) has been evaluated and found suitable for that purpose.
C. How to Install:
To help identify the date to replace the unit, a label has
been affixed to the side of the alarm. Write the “Replace
by” date (7 years from initial power up) in permanent marker on the label. See Alarm Replacement section for additional information.
Remove mounting plate from the back of the unit by holding the rim of the mounting plate and twisting counterclockwise (left). See Diagram C. Hold the mounting plate
against the selected installation location (wall or ceiling) and
mark the center of the holes with a pencil.
Operating and Installation Instructions
To ensure aesthetic alignment of the alarm with the hallway
or wall, the “A” line on the mounting plate should be parallel with the hallway when ceiling mounting, or horizontal
when wall mounting. See Diagram D.
Drill a hole through the pencil
marks and use the enclosed
screws and anchors (see diagram E) to secure (use 3/16”
drill bit for anchor holes). Align
the Smoke/CO Alarm with the
mounting plate and rotate
clockwise (right) until the unit
is aligned. Screw and anchor
accessories are supplied.
Two labels are included with your alarm. They have important information on what to do in case of an alarm. Add the
phone number of your emergency provider (Fire Department
or 911) in the space provided. Place one label next to the
alarm after it is mounted, and one label near a fresh air
source such as a door or window.
Operating and Installation Instructions
D. Tamper Resist Feature:
To make your smoke alarm tamper resistant, a tamper resist
feature has been provided. Activate the tamper resist feature by breaking off the four posts in the square holes in
the trim ring (see figure A). When the posts are broken off,
the tamper resist tab on the base is allowed to engage the
mounting bracket. Rotate the alarm onto the mounting
bracket until you hear the tamper resist tab snap into place,
locking the alarm on the mounting bracket. Using the
tamper resist feature will help deter children and others
from removing the alarm from bracket. NOTE: To remove
the alarm when the tamper resist tab is engaged, press
down on the tamper resist tab, and rotate the alarm off of
the bracket (see figure B).
Operating and Installation Instructions
Step 3: Testing the Alarm
The test button has four purposes. It tests the unit’s electronics, resets the alarm, activates the Hush® feature, and
activates the peak level memory.
CAUTION: Due to the loudness (85 decibels) of the
alarm, always stand an arms length away from the
unit when testing.
• To test: Press and release the test/reset button and a
series of beeps will sound, followed by the message
“Fire! Fire!”, then another two series of beeps and the
message “Warning! Carbon Monoxide”, followed by 4
additional short beeps.
• Reset: If the Smoke/CO Alarm is sounding a CO alarm,
pressing the test/reset button will silence the alarm. If the
CO condition that caused the alert continues, the alarm
will reactivate. Reactivation times depend on the amount
of CO present. See page 21.
• Hush®: If the Smoke/CO Alarm is sounding a Smoke
alarm, pressing the test/reset button will temporarily
silence the alarm. If the smoke level continues to build,
the alarm will reactivate. See Step 4: Hush® Control
• Peak Level Memory: If the green LED is blinking once
every 16 seconds, the unit has detected a hazardous
condition. If the unit has detected a CO level of 100
PPM or greater, pushing the Test/Reset button will result
in a voice message “Caution, carbon monoxide previously detected”. Peak level also happens if the unit detects
smoke and then comes out of alarm. However, there is
no voice message if the unit is in peak level due to
smoke. When the Test/Reset button is pushed, the unit
exhibits a normal PTT if in peak level due to smoke.
Weekly testing is required! If at anytime it does not perform as described, verify the three batteries are installed
correctly and that they don’t need replacing. Clean dust
and other buildup off the unit. If it still doesn’t operate
properly call the Consumer Hotline at 1-800-880-6788.
Operating and Installation Instructions
Step 4: Hush® Control Feature
The Hush® feature has the capability of temporarily desensitizing the smoke alarm circuit for approximately 10 minutes. This
feature is to be used only when a known alarm condition, such
as smoke from cooking, activates the alarm. You can put your
Smoke/CO Alarm in Hush® mode by pushing the test/reset button. The unit will give a voice message "Hush mode activated." If the smoke is not too dense, the alarm will silence
immediately and the green LED light will flash every 2 seconds
for approximately 10 minutes. This indicates that the smoke
alarm is in a temporarily desensitized condition. Your
Smoke/CO Alarm will automatically reset after approximately
10 minutes. When the unit returns to normal operation after
being in Hush® mode the alarm will sound if smoke is still present. The Hush® feature can be used repeatedly until the air has
been cleared of the condition causing the alarm. While the
unit is in Hush® mode, pushing the test/reset button on the
alarm will also end the Hush® period. The unit will give a voice
message "Hush mode cancelled."
Step 5: Peak Level Memory
if the green LED is blinking once every 16 seconds, the unit has
detected a hazardous condition. If the CO sensor has detected
a CO level of 100 PPM or higher since last reset, it will be
recorded by the Peak Level Memory function. To access the
Peak Level Memory press the test/reset button. If a reading of
100 PPM or higher has been recorded the unit will give a voice
message "Caution, Carbon Monoxide previously detected." If
you’ve been away from home this feature allows you to check
if there was a CO reading of 100 PPM, or higher, during your
absence. Pushing the test/reset button resets the memory. It’s
also reset when the batteries are removed. There is no voice
message associated with peak level due to smoke. When the
test/reset button is pushed, the unit exhibits a normal PTT if
the peak level is due to smoke.
What To Do When The Alarm Sounds!
Determining what type of alarm has sounded is easy with
your Kidde Combination Smoke/CO Alarm. The voice message warning system will inform you of the type of situation occurring. Refer to the Features section on page 4 for a
detailed description of each alarm pattern.
When the smoke alarm sounds:
Smoke alarms are designed to minimize false alarms.
Cigarette smoke will not normally set off the alarm, unless
the smoke is blown directly into the alarm. This unit contains advanced technology designed to reduce nuisance
alarms, such as from cooking particles. However, large
quantities of combustible particles from spills or broiling
could still cause the unit to alarm. Careful location of the
unit away from the kitchen area will give the maximum nuisance alarm protection. Combustion particles from cooking
may set off the alarm if located too close to the cooking
area. 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 remove these combustible products from the
If the alarm sounds, check for fires first. If a fire is discovered follow these steps. Become thoroughly familiar with
these items, and review with all family members!
• Alert small children in the home. Children sleep very
sound and may not be awakened by the sound of the
smoke alarms.
• Leave immediately using one of your planned escape
routes (see page 25). Every second counts, don’t stop
to get dressed or pick up valuables.
• Before opening inside doors look for smoke seeping in
around the edges, and feel with the back of your hand
If the door is hot use your second exit. If you feel it’s
safe, open the door very slowly and be prepared to
close immediately if smoke and heat rush in.
• If the escape route requires you to go through smoke,
What To Do When The Alarm Sounds!
crawl low under the smoke where the air is clearer.
• Go to your predetermined meeting place. When two
people have arrived one should leave to call 911 from
a neighbor’s home, and the other should stay to
perform a head count.
• Do not reenter under any circumstance until fire
officials give the go ahead.
• There are situations where a smoke alarm may
not be effective to protect against fire as noted
by the NFPA and UL. For instance:
- Smoking in bed.
- Leaving children unsupervised.
- Cleaning with flammable liquids, such as gasoline.
- Fires where the victim is intimate with a flaming
initiated fire; for example, when a person's
clothes catch fire while cooking.
- Fires where the smoke is prevented from reaching the detector due to a closed door or other
- Incendiary fires where the fire grows so rapidly
that an occupant's egress is blocked even with
What To Do When The Alarm Sounds
properly located detectors.
Actuation of your CO Alarm
indicates the presence of
Carbon Monoxide (CO)
which can kill you.
When the carbon monoxide alarm sounds:
If alarm signal sounds:
1) Operate the test/reset button
2) Call your emergency
services (Fire Dept. or 911)
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. Do not reenter the
premises nor move away from the open door/
window until the emergency services responders
have arrived, the premises has been aired out, and
your alarm remains in its normal condition.
4) After following steps 1-3, if your alarm reactivates
within a 24 hour period, repeat steps 1-3 and
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 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’s directly,
for more information about CO safety and this
equipment. Make sure that motor vehicles are not,
and have not been, operating in an attached
garage or adjacent to the residence.
Never restart the source of a CO problem until it has
Alarm Response Time
The CO sensor meets the alarm response time requirements
of UL standard 2034. Standard alarm times are as follows:
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.
This carbon monoxide alarm is designed to detect
carbon monoxide gas from ANY source of combustion. It is NOT designed to detect any other gas.
Fire Departments, most utility companies and HVAC contractors will perform CO inspections, some 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.
Battery Replacement
If any form of battery failure is detected the red LED light will
flash and the unit will “chirp” one time, followed by the
warning message “LOW BATTERY”. This cycle will occur once
every minute for the first hour. After the first hour, the red
LED light will continue flashing accompanied by the chirp
only sound every 60 seconds. The voice message “LOW
BATTERY” will sound once every fifteen minutes during the
chirp only cycle, and will continue for at least seven days.
If the red LED light flashes along with a chirp every 30
seconds, and is not followed by the voice message
“LOW BATTERY” as described above, your unit has
malfunctioned. Call our toll free Consumer Hotline at 1800-880-6788 for instructions on how to return the unit.
Refer to Step 1 on page 8 for information on
installing the batteries.
Replace batteries with one of the following approved
brands: Duracell MN1500, MX1500 or Energizer E91.
These batteries can be purchased at your local retailer.
Battery Replacement
WARNING! Use only the batteries specified. Use of different batteries may have a detrimental effect on the
Smoke/CO alarm. A good safety measure is to replace the
batteries twice a year, at the same time you change your
clocks for daylight saving time.
Alarm Replacement
Seven years after initial power-up, this unit will “chirp”
twice every 30 seconds to indicate that it is time to replace
the alarm. A label has been provided on the side of the
alarm that has “Replace by” printed on it. Write the replace
by date on the label. The date written on the label should
be after seven (7) years of cumulative power.
General Maintenance
To keep your Smoke/CO Alarm in good working order,
please follow these simple steps:
• Verify unit alarm, lights and battery operation by
pushing the test/reset button once a week.
• Remove the unit from mounting bracket and vacuum
the alarm cover and vents with a soft brush
attachment once a month to remove dust and dirt.
• Never use detergent or other solvents to clean the unit.
• Avoid spraying air freshener, hair spray, or other
aerosols near the Smoke/CO Alarm.
Do not paint the unit. Paint will seal the vents and interfere
with the sensor’s ability to detect smoke and CO. Never
attempt to disassemble the unit or clean inside. This action
will void your warranty. Move the Smoke/CO Alarm and
General Maintenance
place in another location prior to performing any of the
• Staining or stripping wood floors or furniture
• Painting
• Wall papering
• Using adhesives
Storing the unit in a plastic bag during any of the above
projects will protect the sensors from damage. Do not
place near a diaper pail.
WARNING: Reinstall the Smoke/CO Alarm as soon as possible to assure continuous protection.
When household cleaning supplies or similar contaminates
are used, the area must be well ventilated. The following
substances can effect the CO sensor and may cause false
readings and damage to the sensor: Methane, propane, isobutane, iso-propanol, ethyl acetate, hydrogen sulfide, sulfide dioxides, alcohol based products, paints, thinner, solvents, adhesives, hair spray, after shave, perfume, and some
cleaning agents.
Carbon Monoxide Safety Information
General CO Information
Carbon Monoxide (CO) is a colorless, odorless, and tasteless
poison gas that can be fatal when inhaled. CO inhibits the
blood’s capacity to carry oxygen.
Possible Sources
CO can be produced when burning any fossil fuel: gasoline,
propane, natural gas, oil and wood. It can be produced by
any fuel-burning appliance that is malfunctioning, improperly installed, or not ventilated correctly. Possible sources
include furnaces, gas ranges/stoves, gas clothes dryers,
water heaters, portable 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, and a loose or cracked furnace exchanger can also
Carbon Monoxide Safety Information
cause 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.
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, simultaneous operation of several
fuel-burning appliances competing for limited internal 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,
extended operation of unvented fuel-burning devices (range,
oven, fireplace, etc.), temperature inversions which can trap
exhaust gasses 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 the color of flame on pilot lights
and burners is blue. A yellow or orange flame is a sign that
the fuel is not burning completely. Teach all household
members what the alarm sounds like and how to respond.
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
Carbon Monoxide Safety Information
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,
cardiorespiratory failure, 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
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 effected. Familiarization with the effects of each level is
Fire Safety Information
Escape Plan
Prepare and practice a home escape plan twice a year,
including drills at night. Know two ways out of every room
(door & window) and identify a meeting place outside the
home where everyone will gather once they have exited the
residence. When two people have reached the meeting
place, one should leave to call 911 while the second person
stays to account for additional family members. Establish a
rule that once you’re out, you never reenter under
any circumstance!
Fire Safety Information
Fire Prevention
Never smoke in bed, or leave cooking food unattended.
Teach children never to play with matches or lighters! Train
everyone in the home to recognize the alarm pattern, voice
message warning and to leave the home using their escape
plan when it’s heard. Know how to do
“Stop, Drop and Roll” if clothes catch
on fire, and how to crawl low under
smoke. Install and maintain fire extinguishers on every level of the home and
in the kitchen, basement and garage.
Know how to use a fire extinguisher
prior to an emergency. Second level
and higher occupied rooms with windows, should have an escape ladder.
Current studies have shown smoke alarms may not awaken
all sleeping individuals, and that it is the responsibility of
individuals in the household that are capable of assisting
others to provide assistance to those who may not be
awakened by the alarm sound, or to those who may be
incapable of safely evacuating the area unassisted.
Industry Safety Standards
NFPA (National Fire Protection Association)
For your information, the National Fire Protection
Association’s Standard 72, reads as follows:
Smoke Detection. Where required by applicable laws, codes,
or standards for the specified occupancy, approved singleand multiple-station smoke alarms shall be installed as follows: (1) In all sleeping rooms Exception: Smoke alarms shall
not be required in sleeping rooms in existing one- and twofamily dwelling units. (2) Outside of each separate sleeping
area, in immediate vicinity of the sleeping rooms. (3) On
each level of the dwelling unit, including basements
Exception: In existing one- and two-family dwelling units,
approved smoke alarms powered by batteries are permitted.
Smoke Detection–Are More Smoke Alarms Desirable?
The required number of smoke alarms might not provide
reliable early warning protection for those areas separated
by a door from the areas protected by the required smoke
alarms. For this reason, it is recommended that the householder consider the use of additional smoke alarms for
those areas for increased protection. The additional areas
include the basement, bedrooms, dining room, furnace
room, utility room, and hallways not protected by the
required smoke alarms. The installation of smoke alarms in
kitchens, attics (finished or unfinished), or garages is not
normally recommended, as these locations occasionally
experience conditions that can result in improper operation.
California State Fire Marshall
Early warning fire detection is best achieved by the installation of fire detection equipment in all rooms and areas of
the household as follows: A smoke alarm installed in each
separate sleeping area (in the vicinity, but outside the bedrooms), heat or smoke detectors in the living rooms, dining
rooms, bedrooms, kitchens, hallways, attics, furnace rooms,
closets, utility and storage rooms, basements and attached
Industry Safety Standards
Consumer Product Safety Commission
The Consumer Product Safety Commission (CPSC) recommends the use of at least one CO Alarm per household,
located near the sleeping area.
Ionization type smoke alarms use a very small amount of a
radioactive element in the sensing chamber to enable
detection of visible and invisible combustion products. The
radioactive element is safely contained in the chamber and
requires no adjustments or maintenance. This smoke alarm
meets or exceeds all government standards. It is manufactured and distributed under license from the U.S. Nuclear
Regulatory Commission.
Warranty and Service Information
Kidde warrants that the enclosed alarm (but not the battery) will be free from defects in material and workmanship
or design under normal use and service for a period of five
years from the date of purchase. The obligation of Kidde
under this warranty is limited to repairing or replacing the
alarm or any part which we find to be defective in material,
workmanship or design, free of charge, upon sending the
alarm with proof of date of purchase, postage and return
postage prepaid, to Warranty Service Department, Kidde,
1016 Corporate Park Drive, Mebane, NC 27302.
This warranty shall not apply to the alarm if it has been
damaged, modified, abused or altered after the date of
purchase or if it fails to operate due to improper maintenance or inadequate AC or DC power. Any implied warranties arising out of this sale, including but not limited to
the implied warranties of description, merchantability and
fitness for a particular purpose, are limited in duration to
the above warranty period. In no event shall the
Manufacturer be liable for loss of use of this product or for
any indirect, special, incidental or consequential damages,
or costs, or expenses incurred by the consumer or any other
user of this product, whether due to a breach of contract,
negligence, strict liability in tort or otherwise. The
Manufacturer shall have no liability for any personal injury,
property damage or any special, incidental, contingent or
consequential damage of any kind resulting from gas leakage, fire or explosion.
Since some states do not allow limitations of the duration
of an implied warranty or do not allow the exclusion or limitation of incidental or consequential damages, the above
limitations or exclusions may not apply to you. While this
warranty gives you specific legal rights, you may also have
other rights which vary from state to state.
Warranty and Service Information
Also, Kidde makes no warranty, express or implied, written
or oral, including that of merchantability or fitness for any
particular purpose, with respect to the battery.
The above warranty may not be altered except in writing
signed by both parties hereto.
Your Kidde Combination Smoke & CO Alarm is not a substitute for property, fire, disability, life or other insurance of
any kind. Appropriate insurance coverage is your responsibility. Consult your insurance agent. Removal of the front
cover will void the warranty.
This alarm is not intended to alert hearing impaired
Service Information
During the specified warranty period Kidde will repair or
replace, at its discretion any defective Kidde Combination
Smoke & CO Alarms that are returned in a postage paid
package to the following address: Kidde, Attn: Warranty
Returns, 1016 Corporate Park Drive, Mebane, NC 27302,
USA. Please include your name, address and phone number along with a brief description of what is wrong with the
unit. For further assistance please call our toll free
Consumer Hotline at 1-800-880-6788. Damage from neglect, abuse or failure to adhere to any of the enclosed
instructions will result in termination of the warranty, and
the unit will not be replaced or repaired.
This manual and the products described herein are copyrighted, with all rights reserved. Under these copyright laws,
no part of this manual may be copied for use without the
written consent of Kidde. If you require further information
please contact out Consumer Hotline at 1-800-880-6788 or
write us at: Kidde, 1016 Corporate Park Drive, Mebane, NC
27302. Our internet address is
Call our Consumer Hotline at 1-800-880-6788 or contact
us at our website at
Kidde, 1016 Corporate Park Drive, Mebane, NC 27302
Made in China
U.S. Patents 6,160,487 and 6,753,786
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