MC-350EN&SPT_(03)_
2-in-1 Natural Gas and Carbon Monoxide Alarm
Model DD623NCV
User's Manual
Thank you for purchasing this DeNova Detect 2-in-1 Natural Gas and Carbon
Monoxide Alarm. Please thoroughly read and understand this user's manual
content before using this Gas Alarm and retain it for future reference. When natural
gas (methane) or carbon monoxide is detected, alarm warnings will be activated.
The alarm consists of a flashing red LED light, sounding of a warning alarm and a
recorded message.
DANGER: ASPHYXIATION & EXPLOSION
NATURAL GAS LEAK ALARM INDICATES AN
EMERGENCY SITUATION AND RISK OF EXPLOSION
• Leave building immediately, open doors and windows as you leave.
Take others with you. If you are outside when you hear the alarm,
leave the area immediately.
• Avoid creating any sparks.
• Find a phone AWAY FROM THE AREA and immediately call 911
and/or your gas utility Company.
• Do not re-enter the area until the source of the leak is found and
corrected.
Follow directions from utility employees or emergency responders
on site.
DANGER: ELECTROCUTION
• Do not subject this Gas Alarm to water or liquid by submerging it,
spraying liquid on it or otherwise.
• Do not disassemble this alarm or attempt to remove the front cover.
DANGER: FIRE & EXPLOSION
Improper Gas Alarm disposal may result in fire or explosion.
DANGER: HAZARDOUS CONDITIONS
Follow these instructions completely. Failure to do so may result
in an undetected natural gas leak or carbon monoxide or other
hazardous conditions that may cause serious injury or death.
DANGER: HEARING DAMAGE
Do not place ear directly against or in close proximity to Gas Alarm.
Audible alarms may damage hearing.
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