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Use only the batteries specified. Use of different batteries may have a detrimental
effect on the CO/Gas alarm. The constant exposures to high or low temperatures
or high humidity may reduce battery life.

IMPORTANT!

The battery backup is designed to provide short-term emergency power to the  alarm.
Actual backup time depends on the strength (freshness) of the battery. The battery
backup will not work unless a good battery is properly installed.

NOTE: WEEKLY TESTING IS RECOMMENDED.

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CO AND NATURAL GAS ALARM LIMITATIONS

Alarms have limitations. Like any other electronic device, CO and Gas Alarms are not foolproof.

CO and Gas Alarms have a limited operational life. Your CO and Gas Alarm must be tested weekly,
because it could fail to operate at any time.  If your CO and Gas Alarm fails to test properly, or if
its self-diagnostic test reveals a malfunction, immediately have the unit replaced (see last page
for warranty information).

CO and Gas Alarms can only sense CO which reaches the alarm's sensor. Carbon monoxide may
be present in other areas without reaching the alarm.

CO or gas could be present on one level of the home and not reach the alarm installed on a different
level. For example, CO or gas in the basement may not reach an alarm on the second level, near
the bedrooms. For this reason, we recommend you provide complete coverage by placing a CO and
Gas Alarm on every level of the home.

This alarm is not a smoke alarm. It will not sense smoke or fire. For early warning of fire, you must
install smoke alarms, even though carbon monoxide can be generated by a fire.

CO and Gas Alarms are not a substitute for property, disability, life or other insurance of any kind.
Appropriate coverage is your responsibility.

POTENTIAL SOURCES OF CO IN THE HOME

Fuel-burning appliances, such as;

  heaters, gas or wood burning fireplaces, gas kitchen ranges

or cooktops, gas clothes dryers.

Damaged or insufficient venting; such as;

 corroded or disconnected water heaters, vent pipes,

leaking chimneys, pipes or flues or cracked heat exchangers, blocked or clogged chimney openings.

Improper use of appliances/devices;

 operating a barbeque grill or vehicle in an enclosed area

(such as a garage or screened porch).

Transient CO Problems: 

"transient" or on-again/off-again CO problems can be caused by outdoor

conditions and other special circumstances.

The following conditions can result in transient CO situations:

1. Excessive spillage or reverse venting of fuel-burning appliances caused by outdoor ambient

conditions, such as:

Wind direction and/or velocity, including high gusts of wind. Heavy air in the vent pipes (cold/
humid air with extended periods between cycles).

Negative pressure differential resulting from the use of exhaust fans.

Simultaneous operation of several fuel-burning appliances competing for limited internal air.

Vent pipe connections vibrating loose from clothes dryers, furnaces or water heaters.

Obstructions in or unconventional vent pipe designs which can amplify the above situations.

2. Extended operation of unvented fuel-burning devices (ranges, ovens, fireplaces).

3. Temperature inversions which can trap exhaust close to the ground.

4. A car idling in an open or closed attached garage or near a home.

Summary of Contents for MCN400

Page 1: ...t Levels of CO Cause anAlarm 2 Basic Safety Information 3 Recommended Location ofAlarms 4 Avoid These Locations 4 How to Install 5 Reset Feature 6 Operation Alarm Characteristics 6 What To Do If The A...

Page 2: ...MINUTES This product is intended for use in ordinary indoor locations of family living units It is not designed to measure compliance with Occupational Safety and HealthAdministration OSHA commercial...

Page 3: ...er gas Carbon monoxide and natural gas may be present in other areas The CO and Natural Gas Alarm will only indicate the presence of CO or natural gas which reaches the sensor The CO and Natural Gas A...

Page 4: ...n particles stove furnace water heater space heater if possible In areas where a 20 foot 6m distance is not possible in modular mobile or smaller homes for example it is recommended the alarm be place...

Page 5: ...which will be used as a gathering place if the alarm sounds Page 5 READ CAREFULLY THIS UNIT IS SEALED THE ALARM COVER IS NOT REMOVABLE Leave your CO and Gas Alarm plugged in year round CO and gas pro...

Page 6: ...ously detected CO and had alarmed The red LED is off and blinks on approx every 5 seconds until reset Follow the reset instructions to remove the latching LED see below GAS ALARM LATCHING LED INDICATO...

Page 7: ...n return to normal operation It will continue to monitor the air for CO Ventilate area After up to 5 minutes depending on the level of CO detected if CO levels remain potentially dangerous the horn wi...

Page 8: ...memory reading is cleared The alarm will chirp once to indicate the reset is now complete The screen will temporarily display 000 when the peak CO level is reset and then return to after several seco...

Page 9: ...install smoke alarms even though carbon monoxide can be generated by a fire CO and Gas Alarms are not a substitute for property disability life or other insurance of any kind Appropriate coverage is y...

Page 10: ...nies and HVAC companies offer appliance inspections for a nominal fee Make regular visual inspections of all fuel burning appliances Check appliances for excessive rust and scaling Also check the flam...

Page 11: ...lete MCND401 and MCND601 Series only To reset the peak CO memory press and hold the PEAK RESET button for 10 seconds until the peak level is cleared The alarm will chirp once to indicate the reset is...

Page 12: ...of this Warranty contact Customer Service at 1 800 390 4321 Ext 238 for current postage and handling fees USI DOES NOT WARRANT AND SPECIFICALLY DISCLAIMS ANY WARRANTY WHETHER EXPRESS OR IMPLIED OF FI...

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