Kidde Carbon Monoxide Alarm 2508 7201 07 User Manual

Users Guide for Models KN-COSM-I and KN-COSM-IB  
Combination  
Smoke and  
Carbon Monoxide  
Alarm  
• 120V AC  
• 9V Battery Backup  
(model KN-COSM-IB)  
• 2-LED Display  
• Peak Level Memory  
• Hush®  
• Voice Message System  
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:  
READ AND SAVE THIS USER’S GUIDE  
Manual P/N 810-1512 Rev. N  
2508-7201-07  
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Introduction  
Thank you for purchasing the Kidde Combination Smoke and  
Carbon Monoxide Alarm model # KN-COSM-I or # KN-COSM-IB.  
This alarm is suitable as a Single Station and/or Multiple Station  
(24 devices) alarm. This alarm has a seven-year limited warranty.  
Please take a few minutes to thoroughly read this users 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 27 will help you  
determine the correct location of safety products that will help  
keep your home a safer place.  
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Product View  
FRONT  
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Product View  
BACK  
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Features  
• Loud 85 decibel alarm.  
• Permanent independent smoke and carbon monoxide sensors.  
Smoke alarm takes precedence when both smoke and  
carbon monoxide are present.  
• Powered by 120V AC (60 Hz, 25 mA max) wire-in connector.  
Model KN-COSM-IB is also equipped with a 9V battery backup.  
• Model KN-COSM-IB is equipped with Battery Pull Tab that  
allows for easy battery connection. Simply pull tab out, and  
battery is connected!  
• Interconnectable to other Kidde/Nighthawk brand smoke and  
CO alarms (see page 16 for details).  
• 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!". This continues until the  
unit is reset or the CO eliminated. While powered by battery  
only, after four minutes the alarm/voice pattern will sound  
once every minute. The red Light Emitting Diode (LED) light will  
flash while in alarm/voice mode.  
LOW BATTERY(model KN-COSM-IB only): 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 and will continue for at least seven days.  
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Features  
• Voice Message System that alerts user to the following  
conditions:  
– System announces “HUSH MODE ACTIVATED” when  
the unit is first put into HUSH Mode.  
– System announces “HUSH MODE CANCELLED” when  
unit resumes normal operation after Hush Mode has  
been cancelled.  
– System announces “CARBON MONOXIDE PREVIOUSLY  
DETECTED” when the unit has detected CO  
concentrations of 100 ppm or higher.  
– System announces “PUSH TEST BUTTON” when the unit  
is powered up, reminding user to activate the Test  
Button.  
• 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.  
Test/Reset button performs the following functions:  
Tests the units electronics and verifies proper unit  
operation  
– Resets the unit during CO alarm  
– Activates HUSH Feature  
– Activates Peak Level Memory Feature  
• HUSH Control Feature that silences the unit during nuisance  
alarm situations (see page 15).  
• Peak Level Memory Feature which alerts user when the unit  
has detected CO concentrations of 100 ppm or greater (see  
page 16).  
• Alarm Memory Feature that gives visual indication when an  
alarm has sensed a hazardous condition.  
• Green and red LED lights that indicate normal operation and  
alarm status (see page 17 for details).  
Tamper Resist Feature that deters children and others from  
removing the alarm (see page 17).  
• Model KN-COSM-IB is equipped with a battery reminder flag  
that prohibits installation when battery is not present.  
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Features and General Information  
• Seven (7) years after initial 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.  
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.  
WARNING: PLEASE READ CAREFULLY AND  
THOROUGHLY  
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 warning 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.  
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Features and General Information  
• 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.  
• 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 ones 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 (see page 21 for alarm times). 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.  
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Installation Instructions  
Step 1  
Installation Guide:  
IMPORTANT: THIS ALARM MUST BE MOUNTED ON A  
CEILING OR WALL. IT WAS NOT DESIGNED FOR USE AS A  
TABLETOP DEVICE! INSTALL ONLY AS DETAILED!  
A. Recommended Installation Locations:  
Kidde Safety 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 figure  
1). 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 figure  
1).  
FIGURE 1  
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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).  
FIGURE 2  
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 2). 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!  
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Installation Instructions  
THIS EQUIPMENT SHOULD BE INSTALLED IN ACCORDANCE  
WITH THE NATIONAL FIRE PROTECTION ASSOCIATION’S  
STANDARD 72 (National Fire Protection Association,  
Batterymarch Park, Quincy, MA 02269).  
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  
bathrooms! INSTALL AT LEAST 5 FEET AWAY FROM ANY  
FUEL BURNING APPLIANCE.  
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 ares. 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  
sensor. 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. Keep out of  
damp and humid areas.  
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.  
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Installation Instructions  
Step 2  
Wiring Instructions:  
WIRING REQUIREMENTS  
• This smoke alarm should be installed on a U.L. listed or  
recognized junction box. All connections should be made by a  
qualified electrician and all wiring used shall be in accordance  
with articles 210 and 300.3(B) of the U.S. National Electrical  
Code ANSI/NFPA 70, NFPA 72 and/or any other codes having  
jurisdiction in your area. The multiple station interconnect  
wiring to the alarms must be run in the same raceway or cable  
as the AC power wiring. In addition, the resistance of the  
interconnect wiring shall be a maximum of 10 ohms.  
• The appropriate power source is 120 Volt AC Single Phase  
supplied from a non-switchable circuit, which is not protected  
by a ground fault interrupter.  
• Smoke alarms are not to be used with detector guards unless  
the combination (alarm and detector guard) have been  
evaluated and found suitable for that purpose.  
WARNING: The alarm cannot be operated from power derived  
from a square wave, modified square wave or modified sine  
wave, inverter. These types of inverters are sometimes used to  
supply power to the structure in off grid installations, such as  
solar or wind derived power sources. These power sources  
produce high peak voltages that will damage the alarm.  
WIRING INSTRUCTIONS FOR AC QUICK CONNECT HARNESS  
CAUTION! TURN OFF THE MAIN POWER TO THE CIRCUIT  
BEFORE WIRING THE ALARM.  
• For alarms that are used as single station, DO NOT CONNECT  
THE RED WIRE TO ANYTHING. Leave the red wire insulating  
cap in place to make certain that the red wire cannot contact  
any metal parts or the electrical box.  
• When alarms are interconnected, all interconnected units must  
be powered from a single circuit.  
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Installation Instructions  
• A maximum of 24 Kidde Safety devices may be interconnected  
in a multiple station arrangement. The interconnect system  
should not exceed the NFPA interconnect limit of 12 smoke  
alarms and/or 18 alarms total (smoke, CO, Smoke/ CO  
Combination, heat, etc.). This Smoke/CO combination alarm  
must be counted as a smoke alarm when determining the  
number of units on an interconnect line. With 18 alarms  
interconnected, it is still possible to interconnect up to a total  
of 6 remote signaling devices and /or relay modules (see page  
15 for details on interconnecting Kidde devices).  
• The maximum wire run distance between the first and last unit  
in an interconnected system is 1000 feet.  
• Figure  
3
illustrates interconnection wiring.  
Improper  
connection will result in damage to the alarm, failure to  
operate, or a shock hazard.  
• Make certain alarms are wired to a continuous (non-switched)  
power line. NOTE: Use standard UL Listed household wire (as  
required by local codes) available at all electrical supply stores  
and most hardware stores.  
FUSE OR CIRCUIT BREAKER  
BLACK  
WHITE  
RED  
BLACK  
WHITE  
RED  
CONNECTOR  
CONNECTOR  
Kidde  
Relay Module  
SM120X  
Additional  
Alarm  
First  
Alarm  
Additional  
Alarm  
A
A
LA  
L
R
A
M
R
M
Optional  
Accessory  
O
O
PE  
P
R
E
A
R
T
A
E
T
E
FIGURE 3 Interconnect Wiring Diagram  
WIRES ON ALARM HARNESS  
Black  
CONNECTED TO  
Hot Side of AC Line  
White  
Red  
Neutral Side of AC Line  
Interconnect Lines (Red Wires) of  
Other Units in the Multiple Station  
Set up  
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Installation Instructions  
Step 3  
Mounting Instructions:  
CAUTION: YOUR SMOKE/CO ALARM IS SEALED AND THE  
COVER IS NOT REMOVABLE!  
1. 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.  
2. Remove the mounting bracket from the back of the alarm by  
holding the mounting bracket and twisting the alarm in the  
direction indicated by the “OFF”arrow on the alarm cover.  
3. After selecting the proper location for your Smoke/CO Alarm,  
as described on Pages 8-10, and wiring the AC QUICK  
CONNECT harness as described in the WIRING  
INSTRUCTIONS, attach the mounting bracket to the electrical  
box. To ensure aesthetic alignment of the alarm with the  
hallway, or wall, the “A” line on the mounting bracket must  
be parallel with the hallway when ceiling mounted, or  
horizontal when wall mounted.  
4. Pull the AC QUICK CONNECTOR  
through the center hole in the  
mounting bracket and secure  
the bracket, making sure that  
the mounting screws are  
positioned in the small ends of  
the keyholes before tightening  
the screws.  
5. Plug the AC QUICK CONNECTOR  
into the back of the alarm (see  
figure 4), making sure that the  
FIGURE 4 Installing AC  
Quick Connect  
locks on the connector snap into place. Then push the excess  
wire back into the electrical box through the hole in the center  
of the mounting bracket.  
6. Install the alarm on the mounting bracket and rotate the  
alarm in the direction of the “ON” arrow on the cover until  
the alarm ratchets into place (this ratcheting function allows  
for aesthetic alignment). Note: The alarm will mount to the  
bracket in 4 positions (every 90 degrees).  
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Installation Instructions  
7. Turn on the AC power. The green AC Power On Indicator  
should be lit when the alarm is operating from AC power.  
8. 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 service 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.  
9. For model KN-COSM-IB only: Pull the Battery Pull Tab (yellow  
tab protruding from unit) completely out of unit. This will  
automatically connect the battery.  
Step 4  
Testing the Alarm  
CAUTION: Due to the loudness (85 decibels) of the alarm,  
always stand an arms length away from the unit when  
testing.  
The test/reset button has four purposes. It tests the units  
electronics, resets the CO alarm, activates the HUSH feature, and  
activates the Peak Level Memory Feature.  
After installation, TEST THE UNIT’S ELECTRONICS by pressing and  
releasing the test/reset button. 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.  
Weekly testing is required! If at anytime it does not perform as  
described, verify power is connected correctly and that the  
battery doesn’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.  
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Operating Instructions  
Interconnect Feature  
Your Combination Smoke/CO Alarm is interconnectable to other  
multiple station Kidde, Nighthawk and Kidde/Fyrnetics products:  
• When compatible smoke alarms and heat alarms are  
interconnected to your Smoke/CO Alarm, they will only  
respond to a smoke related event.  
• When mixing compatible models with battery backup with  
models without battery backup, be advised that the models  
without battery backup will not respond during an AC power  
failure.  
• This unit is only approved to interconnect with other  
Kidde/Nighthawk products. It is NOT approved to interconnect  
with any other brand of detection product.  
• This alarm is interconnect compatible with the following alarms  
and accessories:  
– Smoke alarms: 1235, 1275, 1276, 1285, 1296, i12020,  
i12040, i12060, i12080, PE120, PI2000, PI2010  
KN-COSM-IB, KN-COSM-I, KN-SMFM-I, and RF-SM-ACDC.  
Firex: 4618, 4518, 4480, 460 and 484.  
Kidde/Firex: i4618, i4718, and i5000  
– Heat alarm: HD135˚F  
– CO alarms: KN-COB-IC, KN-COP-IC, KN-COPF-I  
– Relay modules: 120X, SM120X, CO120X  
– Strobe Light: SL177i  
See Users Guides for specific application information.  
• For more information about compatible interconnect units and  
their functionality in an interconnect system, visit our web site  
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. If the smoke is not too dense, the alarm will silence  
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Operating Instructions  
immediately, the unit will verbally announce “HUSH MODE  
ACTIVATED”, and the green LED 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,  
it will verbally announce “HUSH MODE CANCELLED”, and sound  
the alarm 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.  
NOTE: DENSE SMOKE WILL OVERRIDE THE HUSH CONTROL  
FEATURE AND SOUND A CONTINUOUS ALARM.  
CAUTION: BEFORE USING THE ALARM HUSH FEATURE,  
IDENTIFY THE SOURCE OF THE SMOKE AND BE CERTAIN A  
SAFE CONDITION EXISTS.  
Reset Feature  
If the 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).  
Peak Level Memory  
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 announce “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, or higher, during your absence.  
Pushing the test/reset button resets the memory. Its also reset  
when the power is removed.  
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Operating Instructions  
LED Indicator Operation  
Red LED  
Red LED will flash in conjunction with the alarm beep.  
Therefore, the red LED will flash during a smoke alarm, a CO  
alarm, a low battery mode chirp and a unit error mode chirp.  
Green LED  
The green LED will flash as described below under the following  
conditions:  
– Standby Condition (powered by AC and battery backup):  
The LED will be constantly on.  
– Standby Condition (for model KN-COSM-IB only-powered  
by only battery backup): The LED will flash every 30  
seconds..  
– Alarm Memory Condition: The LED will flash every  
second during alarm. When the alarm condition goes  
away, the originating alarm unit will flash the LED every  
15 seconds until the test/reset button is pressed, thus  
resetting the alarm. Note: to conserve battery power,  
the Alarm Memory feature does not work when the unit  
is in low battery condition.  
– HUSH MODE Condition: The LED will flash every 2  
seconds while the alarm is in HUSH mode.  
Tamper Resist Feature  
To make your smoke/CO 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 5A). 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 5B).  
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Operating Instructions  
A
A
Posts  
FIGURE 5A  
FIGURE 5B  
NEVER IGNORE THE SOUND OF THE ALARM!  
Determining what type of alarm has sounded is easy with your  
Nighthawk Combination Smoke/CO Alarm. The voice message  
warning system will inform you of the type of situation occurring.  
Refer to the Features section on pages 4-7 for a detailed  
description of each alarm pattern.  
What To Do If The Alarm Sounds  
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. 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 kitchen.  
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What To Do If The Alarm Sounds  
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.  
• Leave immediately using one of your planned escape routes  
(see page 26). 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 its 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, 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 neighbors  
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 stated in the NFPA  
Standard 72. For instance:  
a) smoking in bed  
b) leaving children unsupervised  
c) cleaning with flammable liquids, such as gasoline  
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What To Do If The Alarm Sounds  
When the carbon monoxide alarm sounds:  
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/reset button  
2) Call your emergency  
PHONE NUMBER  
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 call a  
qualified appliance technician  
to investigate for sources of  
PHONE NUMBER  
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 been  
fixed. NEVER IGNORE THE ALARM!  
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Alarm Removal and Battery Replacement  
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.  
Its advisable to inquire about any applicable fees prior to having  
the service performed. Kidde Safety will not pay for, or reimburse,  
the owner or user of this product, for any repair or dispatch calls  
related to the alarm sounding.  
Alarm Removal  
IF TAMPER RESIST FEATURE HAS BEEN ACTIVATED, REFER  
TO TAMPER RESIST FEATURE DESCRIPTION ON PAGE 19 FOR  
REMOVAL INSTRUCTIONS.  
Remove the alarm from the mounting bracket by rotating the  
alarm in the direction of the “OFF” arrow on the cover. To  
disconnect the AC power harness, squeeze the locking arms on  
the sides of the Quick Connector while pulling the connector  
away from the bottom of the alarm (see page 13, figure 4).  
Battery Replacement  
(For model KN-COSM-IB only)  
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, 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 1-800-880-6788 for  
instructions on how to return the unit.  
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Alarm Removal and Battery Replacement  
CAUTION: YOUR SMOKE/CO ALARM IS SEALED AND THE  
COVER IS NOT REMOVABLE!  
To replace the battery you must first remove the alarm from the  
mounting bracket by following the ALARM REMOVAL  
instructions at the beginning of this section. After the alarm has  
been removed, you can open the battery door and replace the  
battery.  
Battery installation instructions are provided on the inside of the  
battery door.  
Battery  
finger  
FIGURE 6 Battery Replacement  
When installing the battery, press the battery reminder finger  
down into the battery compartment and install the battery (see  
figure 6).  
CAUTION! IF THE BATTERY REMINDER FINGER IS NOT HELD  
DOWN IN THE BATTERY COMPARTMENT BY THE BATTERY,  
THE BATTERY DOOR WILL NOT CLOSE, THE AC QUICK  
CONNECTOR WILL NOT ATTACH TO THE ALARM, AND THE  
ALARM WILL NOT ATTACH TO THE MOUNTING BRACKET.  
After installing or changing the battery, reinstall your alarm. Test  
your alarm by using the test/reset button and check that the  
green LED is on.  
Replace batteries with one of the following approved brands:  
Duracell MN1604, MX1604, Energizer 522, Gold Peak 1604A,  
Ultralife U9VL-J. These batteries can be purchased at your local  
retailer.  
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General Maintenance  
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 battery at least once a  
year, or at the same time yo 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.  
REPLACE IMMEDIATELY! IT WILL NOT DETECT CO IN THIS  
CONDITION.  
To keep your Smoke/CO Alarm in good working order, please  
follow these simple steps:  
• Verify the unit's alarm and LED lights 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. REINSTALL IMMEDIATELY  
AFTER CLEANING AND THEN TEST USING THE TEST/RESET  
BUTTON!  
• Never use detergents or other solvents to clean the unit.  
• Avoid spraying air fresheners, hair spray, or other aerosols near  
the Smoke/CO Alarm.  
Do not paint the unit. Paint will seal the vents and interfere with  
the sensors 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 place in another location prior to  
performing any of the following:  
• Staining or stripping wood floors or furniture  
• Painting  
• Wall papering  
• Using adhesives  
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General Maintenance  
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, iso-butane, 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  
bloods 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 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  
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Carbon Monoxide Safety Information  
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 manufacturers 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 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:  
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Carbon Monoxide Safety Information  
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 important.  
Fire Safety Information  
Escape Plan  
Familiarize everyone with the sound of the smoke alarm and train  
them to leave the home when they hear it. Practice a fire drill at  
least every six months, including fire drills at night. Ensure that  
small children hear the alarm and wake when it sounds. They  
must wake up in order to execute the escape plan. Practice  
allows all occupants to test your plan before an emergency. You  
may not be able to reach your children. It is important they know  
what to do. 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!  
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.  
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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 its 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.  
Industry Safety Standards  
NFPA (National Fire Protection Association)  
For your information, the National Fire Protection Associations  
Standard 72, reads as follows:  
Smoke Detection. Where required by applicable laws, codes, or  
standards for the specified occupancy, approved single- and  
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 two-family 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  
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Industry Safety Standards  
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 garages.  
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.  
NRC  
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.  
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Warranty and Service Information  
Limited Warranty  
SEVEN YEAR LIMITED WARRANTY  
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 seven 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 Dr., 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.  
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.  
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Warranty and Service Information  
The above warranty may not be altered except in writing signed  
by both parties hereto.  
Your Nighthawk 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  
individuals.  
During the specified warranty period Kidde Products will repair or  
replace, at its discretion any defective Nighthawk Combination  
Smoke & CO Alarms that are returned in a postage paid package  
to the following address: Kidde Products Attn: Warranty Returns,  
1016 Corporate Park Dr., 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.  
Product Registration  
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  
Products, 1016 Corporate Park Dr., Mebane, NC 27302.  
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QUESTIONS OR FOR MORE INFORMATION  
Call our Consumer Hotline at 1-800-880-6788 or contact  
us at our website at www.kidde.com  
Kidde 1016 Corporate Park Drive, Mebane, NC 27302  
Custom Assembled in China with U.S. and Foreign Components  
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