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Thank you for purchasing the Kidde Combination
Smoke and Carbon Monoxide Alarm model # KN-
COSM-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 monox-
ide 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 25 will help you
determine the correct location of safety products that
will help keep your home a safer place.
Introduction ...........................................Page 1
Product View ..........................................Pages 2-3
Features ................................................Pages 4-8
Operating/Installation Instructions
Step 1 Installing Batteries ............................Page 8-9
Step 2 Installation Instructions:
A. Recommended Installation Locations ..........Pages 9-12
B. Where Not to Install ............................Page 12-13
C. How to Install ..................................Page 13-14
D. Tamper Resist Feature ..........................Page 15
Step 3 Testing the Alarm .............................Page 16
Step 4 Peak Level Memory .......................... Page 17
What to do if the Alarm Sounds
Smoke Alarm . ........................................Pages 17-18
Carbon Monoxide Alarm .............................Pages 19-20
Battery Replacement ..................................Pages 20-21
General Alarm Maintenance .........................Pages 21-22
Carbon Monoxide Safety Information
General CO Information ............................. Page 22-23
Possible Sources ..................................... Page 23
CO Safety Tips ....................................... Page 24
Symptoms of CO Poisoning ..........................Page 24-25
Fire Safety Information
Escape Plan .......................................... Page 25
Fire Prevention .......................................Page 26
Industry Safety Standards
National Fire Protection Association ..................Page 27
California State Fire Marshall .......................Page 27
Consumer Product Safety Commission .............. Page 28
NRC ..................................................Page 28
Limited Warranty and Service Information ........Pages 28-31
Table of Contents
Introduction