Table of Contents:Page #What You Should Know About CO ... 2What You Should Know About Natural Gas

Page 10BACKUP BATTERY REPLACEMENTDisconnect AC power before changing battery. Shock hazard exists if AC power ismiswired.The alarm uses a 9 Volt batte

Page 11CO AND NATURAL GAS ALARM LIMITATIONSAlarms have limitations. Like any other electronic device, CO and Natural Gas alarms are not foolproof.CO a

Page 12GASBLUE LEDAUDIBLE & VISUAL SIGNALSPOWERGREEN LEDHORNOPERATIONAL SUMMARYCONDITION / RECOMMENDATIONSilentOffOn and BlinksOff approxevery 20s

Page 13GASBLUE LEDAUDIBLE & VISUAL SIGNALSPOWERGREEN LEDHORNOPERATIONAL SUMMARY (continued)CONDITION / RECOMMENDATIONCORED LEDSilent(alarmedprevio

288-3508-05©2012 UNIVERSAL SECURITY INSTRUMENTS, INC., Rev. 08/2013Printed in ChinaPRODUCT SEVEN-YEAR LIMITED WARRANTYMODELS MCN108, MCN108LMODELS MCN

WHAT YOU SHOULD KNOW ABOUT COCarbon monoxide (CO) is an insidious poison. It is a colorless, odorless, tasteless gas. It is acumulative poison. Even l

BASIC SAFETY INFORMATION• This combination Carbon Monoxide and Natural Gas alarm has separate alarms. This alarm isnot designed to detect smoke, heat

Page 4NOTE: For any location, make sure no door or other obstruction could prevent the carbon monoxideor gas from reaching the alarm.WHERE THIS ALARM

Page 5THIS ALARM WILL NOT WORK WITHOUT 120 VAC POWER AND A GOODBATTERY PROPERLY INSTALLED. THE ALARM SHOULD BE TESTED WHENINSTALLED AND THEN TESTED WE

DO NOT TAMPER WITH WIRES WHEN POWER IS ON!For alarms that are used as single non-interconnected, stand-alone alarms, do not connect theyellow wire to

The yellow wire is used only for multiple station operations with USI ELECTRIC or UNIVERSALModel alarms only. Connecting this yellow wire to any other

WHAT TO DO IF CARBON MONOXIDE IS DETECTED:Actuation of your CO Alarm indicates the presence of carbon monoxide (CO), which can kill you. Inother words

Page 9If the unit alarms and you are not testing the unit, it is warning you of a potentially dangeroussituation which requires your immediate attenti