Table of Contents:
Page #
What You Should Know About CO .........................................................2
What You Should Know About Natural Gas............................................2
Recommended Location of Alarms.........................................................2
Basic Safety Information.........................................................................3
Where Alarm Should Not Be Installed ....................................................4
Installation Instructions ...........................................................................5
Electrical Shock Hazard .........................................................................5
Locking / Tamper Feature .......................................................................5
Wiring Instructions ..............................................................................5, 6
Operation, Testing & Maintenance .........................................................7
QUICK FIND
®
Alarm Originating Feature & Reset .................................8
What To Do If The Alarm Sounds ...........................................................8
CO Alarm Silence Feature ......................................................................9
Testing & Maintenance .....................................................................9, 10
Battery Backup Replacement ...............................................................10
CO & Natural Gas Alarm Limitations .................................................... 11
Operational Summary.....................................................................12, 13
Warranty ................................................................................ Back Cover
MODEL MCN108, MCN108L
CARBON MONOXIDE ALARM AND
NATURAL GAS ALARM
WITH SILENCE FEATURE
THANK YOU for purchasing this combination alarm. This manual includes important information
regarding where to install the alarm, how to operate, maintenance, testing and product features. It
also includes tips and information which could help protect you and your family.
PLEASE READ AND SAVE!
288-3508-07
©
2012 UNIVERSAL SECURITY INSTRUMENTS, INC., Rev. 07/2016 CD
Printed in China
SEVEN-YEAR LIMITED WARRANTY
MODELS MCN
108 and
MCN
108L
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defects in material and workmanship for a period of seven (7) years from the date of purchase.
This warranty shall not apply to any batteries used in the product or to any damage which may be
caused by such batteries. This warranty applies only to the original consumer purchaser and only
to products used in normal residential use and service. If this product is found to be defective,
USI’s only obligation, and your exclusive remedy, is the repair or replacement of the product, at
USI’s discretion, provided the product has not been damaged through misuse, abuse, accident,
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instructions supplied with the product.
ALARM RETURNS
For replacement of this alarm under the terms of this Warranty, contact Customer Service at
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a particular purpose, other than the warranty contained herein. No implied warranty on this product,
created by state law, shall extend beyond the term of this warranty unless such law otherwise
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incidental loss or damage, including, but not limited to, damages to any equipment with which this
product is used. Some states do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitations or exclusions may not apply to you. No agent, representative,
dealer, or employee of the company has the authority to increase or alter the obligations or terms
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which vary from state to state. This Warranty is only valid for merchandise purchased from outlets
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LITHIUM BATTERY LIMITED WARRANTY
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alarm ONLY and are not warranted in any other device. Submit your warranty claim through the
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11407 Cronhill Drive, Suite A
Owings Mills, Maryland 21117 USA
Visit Us on the Web!
www.USI Electric.com