Thank you for purchasing the Kidde Combination Smoke andCarbon 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 respondto the alarms, and that they should never play with the unit.Your Kidde Smoke/CO Alarm was designed to detect bothsmoke and carbon monoxide from any source of combustionin a residential environment. It is not designed for use in arecreational vehicle (RV) or boat. If you have any questionsabout the operation or installation of your alarm, please call ourtoll free Consumer Hotline at 1-800-880-6788. The guide onPage 29 will help you determine the correct location of safetyproducts that will help keep your home a safer place.Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1Product View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 2-3Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 4-7Installation InstructionsStep 1 Installation Instructions:A. Recommended Installation Locations . . . . . . Pages 8-10B. Where Not to Install . . . . . . . . . . . . . . . . . . . . Page 11-12Step 2 Wiring Instructions . . . . . . . . . . . . . . . . . . . Page 12-13Step 3 Mounting Instructions. . . . . . . . . . . . . . . . . Page 14-15Step 4 Testing the Alarm . . . . . . . . . . . . . . . . . . . . . Page 16Operating InstructionsInterconnect Feature . . . . . . . . . . . . . . . . . . . . . . . . Page 17HUSH Control Feature . . . . . . . . . . . . . . . . . . . . . . . Page 18Reset Feature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18Peak Level Memory . . . . . . . . . . . . . . . . . . . . . . . . . Page 19LED Indicator Operation . . . . . . . . . . . . . . . . . . . . . Page 19Tamper Resist Feature . . . . . . . . . . . . . . . . . . . . . . . Page 20What to do if the Alarm SoundsSmoke Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 21-22Carbon Monoxide Alarm . . . . . . . . . . . . . . . . . . . . . Pages 22-23Alarm Removal/Battery Replacement . . . . . . . . . Pages 23-25General Alarm Maintenance . . . . . . . . . . . . . . . . . . Pages 26Carbon Monoxide Safety InformationGeneral CO Information . . . . . . . . . . . . . . . . . . . . . Page 27Possible Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27CO Safety Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28Symptoms of CO Poisoning . . . . . . . . . . . . . . . . . . Page 28Fire Safety InformationEscape Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29-30Fire Prevention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30Industry Safety StandardsNational Fire Protection Association . . . . . . . . . . . Page 30California State Fire Marshall . . . . . . . . . . . . . . . . . . Page 31Consumer Product Safety Commission. . . . . . . . . . Page 31NRC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32Limited Warranty and Service Information . . . . Pages 32-34Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . Page 34Table of Contents Introduction1