Kidde KN-COSM-IB User manual

Combination
Smoke and
Carbon Monoxide
Alarm
Manual P/N 810-1512 Rev. H
For questions concerning your Smoke and Carbon Monoxide
Alarm, please call our Consumer Hotline at 1-800-880-6788.
User’s Guide for Models KN-COSM-I and KN-COSM-IB
• 120V AC
• 9V Battery Backup
(model KN-COSM-IB)
• 2-LED Display
• Peak Level Memory
• Hush®
• Voice Message System
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

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1
Product View . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 2-3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 4-7
Installation Instructions
Step 1: Installation Instructions:
A. Recommended Installation Locations . . Pages 8-10
B. Where Not to Install . . . . . . . . . . . . . . . Page 10
Step 2: Wiring Instructions . . . . . . . . . . . . . . . . Page 11-12
Step 3: Mounting Instructions.. . . . . . . . . . . . . . Page 13-14
Step 4: Testing the Alarm. . . . . . . . . . . . . . . . . . Page 14
Operating Instructions
Interconnect Feature . . . . . . . . . . . . . . . . . . . . . Page 15
HUSH Control Feature . . . . . . . . . . . . . . . . . . . . Page 15-16
Reset Feature. . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16
Peak Level Memory . . . . . . . . . . . . . . . . . . . . . . Page 17
LED Indicator Operation. . . . . . . . . . . . . . . . . . . Page 17
Tamper Resist Feature . . . . . . . . . . . . . . . . . . . . Page 17-18
What to do if the Alarm Sounds
Smoke Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 18-19
Carbon Monoxide Alarm. . . . . . . . . . . . . . . . . . Pages 20
Alarm Removal/Battery Replacement . . . . . . . . Pages 21-22
General Alarm Maintenance . . . . . . . . . . . . . . . Pages 26-27
Carbon Monoxide Safety Information
General CO Information . . . . . . . . . . . . . . . . . . Page 24
Possible Sources . . . . . . . . . . . . . . . . . . . . . . . . Page 24
CO Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . Page 25
Symptoms of CO Poisoning . . . . . . . . . . . . . . . Page 25-26
Fire Safety Information
Escape Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 26
Fire Prevention. . . . . . . . . . . . . . . . . . . . . . . . . . Page 27
Industry Safety Standards
National Fire Protection Association . . . . . . . . . Page 27-28
California State Fire Marshall . . . . . . . . . . . . . . . Page 28
Consumer Product Safety Commission. . . . . . . . Page 28
NRC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28
Limited Warranty and Service Information. . . . Pages 29-30
Product Registration . . . . . . . . . . . . . . . . . . . . . . Page 30
Table of Contents

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 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 combus-
tion 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.
Introduction
1

Product View
FRONT
2

Product View
BACK
3

• 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 back-
up.
• 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 fol-
lowed by the verbal warning message “FIRE! FIRE!” This pat-
tern 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 bat-
teries 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.
Features
4

• Voice Message System that alerts user to the following condi-
tions:
– 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.
Features
5

• Seven (7) years after initial power up, this unit will “chirp”
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 possi-
ble. 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 sens-
ing 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.
Features and General Information
6

• 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 bat-
teries 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 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 insur-
ance 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 pres-
ence 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.
Features and General Information
7

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, includ-
ing every bedroom, hallways, finished attics and basements. Put
alarms at both ends of bedroom, hallway or large room if hall-
way 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 com-
bustion 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 ceil-
ing, 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).
Installation Instructions
8FIGURE 1

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 horizontal-
ly). 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 locat-
ed 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 horizon-
tally” (see 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 fig-
ure 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!
Installation Instructions
9
FIGURE 2

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).
B. Where Not to Install:
Do not install in garages, kitchens, furnace rooms or bath-
rooms! 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 chemi-
cals 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, elec-
tronic noise may cause nuisance alarms. Do not place in direct
sunlight and keep out of insect infested areas. Extreme temper-
atures 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.
Installation Instructions
10
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.
!

Step 2
Wiring Instructions:
WIRING REQUIREMENTS
• This smoke alarm should be installed on a U.L. listed or rec-
ognized 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 evalu-
ated and found suitable for that purpose.
•WARNING: The alarm cannot be operated from power
derived from a square wave, modified square wave or modi-
fied sine wave, inverter. These types of inverters are some-
times used to supply power to the structure in off grid instal-
lations, 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.
Installation Instructions
11

• A maximum of 24 Kidde Safety devices may be interconnect-
ed in a multiple station arrangement. The interconnect sys-
tem 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 16 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 connec-
tion 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.
Installation Instructions
12
FUSE OR CIRCUIT BREAKER
REDBLACK
WHITE
CONNECTOR
REDBLACK
WHITE
CONNECTOR
First
Alarm Additional Alarm
Kidde
Relay Module
SM120X
Additional
Alarm
Optional
Accessory
ALARM
OPERATE
ALARM
OPERATE
WIRES ON ALARM HARNESS CONNECTED TO
Black Hot Side of AC Line
White Neutral Side of AC Line
Red Interconnect Lines (Red Wires) of
Other Units in the Multiple Station
Set up
FIGURE 3 Interconnect Wiring Diagram

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 CON-
NECT 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 posi-
tioned in the small ends of the
keyholes before tightening the
screws.
5.Plug the AC QUICK CONNEC-
TOR into the back of the alarm
(see figure 4), making sure that
the 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). 13
Installation Instructions
FIGURE 4 Installing AC
Quick Connect

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 impor-
tant 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 unit’s elec-
tronics, 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 bat-
tery 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.
Installation Instructions
14

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 inter-
connected 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 intercon-
nect 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, KN-COSM-IB,
KN-COSM-I and RF-SM-ACDC
– Heat alarm: HD135˚F
– CO alarms: KN-COB-IC, KN-COP-IC
– Relay modules: 120X, SM120X, CO120X
– Strobe Light: SL177i
See User’s Guides for specific application information.
• For more information about compatible interconnect units
and their functionality in an interconnect system, visit our
web site at www.kidde.com.
HUSH Control Feature
The HUSH feature has the capability of temporarily desensitizing
the smoke alarm circuit for approximately 10 minutes. This fea-
ture 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 but-
ton. If the smoke is not too dense, the alarm will silence imme-
15
Operating Instructions

Operating Instructions
16
diately, the unit will verbally announce “HUSH MODE ACTIVAT-
ED”, and the green LED will flash every 2 seconds for approxi-
mately 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 CON-
TROL 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. It’s
also reset when the power is removed.

Operating Instructions
17
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, but will flicker every 30
seconds when a CO reading is taken.
– Standby Condition (for model KN-COSM-IB only –
powered by only battery backup):
The LED will flash every 5 seconds.
– Alarm Memory Condition: The LED will flash every
second signifying that the alarm sensed a smoke or CO
hazard. It will continue to flash every second until the
test/reset button is pressed, thus resetting the alarm.
– 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 brack-
et. 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 brack-
et. 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).

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 occur-
ring. 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 cook-
ing 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.
Operating Instructions
18
FIGURE 5A
FIGURE 5B
AA
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