THANK YOU for purchasing this combination alarm. It is designed to detect carbon monoxide and
natural gas (methane) which reaches the sensor. It is not designed to detect fire, heat, flames or any
other gas. 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!
Table of Contents:
Page #
What You Should Know About CO .......................................... 2
What You Should Know About Natural Gas ............................. 2
What Levels of CO Cause an Alarm ........................................ 2
Basic Safety Information ......................................................... 3
Recommended Location of Alarms .......................................... 4
Avoid These Locations ............................................................ 4
How to Install .......................................................................... 5
Reset Feature ......................................................................... 6
Operation & Alarm Characteristics .......................................... 6
What To Do If The Alarm Sounds ............................................. 7
CO Alarm Silence Feature ....................................................... 7
Testing & Maintenance ............................................................ 8
Battery Replacement .............................................................. 8
CO & Natural Gas Alarm Limitations ....................................... 9
Operational Summary ............................................................11
Warranty ................................................................. Back Cover
120 VAC, 60 Hz, 100 mA Maximum
Single Station Carbon Monoxide Alarm
Also suitable as a Residential Gas Detector
Models MCN400, MCN400L,
MCND401, MCND401L
Plug-In Carbon Monoxide &
Natural Gas Alarm with
Backup Battery Protection
Models MCN600, MCN600L,
MCND601, MCND601L
Certified to Standards
UL 2034 & UL 1484
Single Station
Carbon Monoxide Alarm
Also Suitable as a
Residential Gas Detector
