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This gas detector detects methane gas.

When gas is detected, an alarm (fl ashing of red LED, sounding of warning 

alarm) will be activated.

Read, understand and retain this manual for future reference.

User’s Manual

Natural Gas Detector

ML-310

Safety Precautions

Read these precautions before using the product and be sure to follow these 

precautions in order to prevent hazardous situations and property damage.

Precautions are classified with the following symbols according to the 

severity of the hazards and damage that may arise due to incorrect 

handling of this product.

DANGER

This indicates details for which incorrect handling of the 

product is expected to lead to situations having an imminent 

chance of hazards leading to death or serious injury.

WARNING

This indicates details for which incorrect handling of 

the product is expected to lead to situations having a 

chance of hazards leading to death or serious injury.

CAUTION

This indicates details for which incorrect handling of 

the product is expected to lead to situations having a 

chance of injury or property damage.

DANGER

Make sure that the following are observed when a gas alarm sounds. 

There may be a risk of explosion.

Leave the building immediately, opening doors and windows as you leave.  

Take others with you.  

If you are outside when you smell the gas, leave the area immediately.

 

Avoid causing a spark, which might cause the gas to explode:

1.  Do not remove the connector from the lithium battery

2.  Do not light a match or smoke.

3.  Do not turn appliances or lights on or off.

4.  Do not use a fl ashlight.

5.  Do not start a car.

6.  Do not use a telephone.

 

Find a phone away from the area and immediately call 911 and/or your 

natural gas utility.  You can report leaks anonymously.  Always call to 

report the problem.  Do not assume someone else will do it.

 

Do not re-enter the area until the source of the leak is found and corrected. Follow 

directions from utility employees or emergency responders who are on site.

WARNING

 This gas detector is equipped with an End Of Life timer that will expire 

after 5 years from date of installation. Replace any gas detectors for 

which 5 years has passed since their installation with a new gas detector.

 Do not subject the gas detector to water either by submerging it in 

water or spraying water on it.

 Do not disassemble or modify this product.

 Do not subject this product to any impact.

 Do not remove the dedicated lithium battery, except for when disposing 

of the gas detector.

 Never cover this product.

 When removing or installing the gas detector, do so by using a stable 

ladder or step stool and proceed with caution.

 Do not change this product’s installation position.

 Do not place or install objects in front of the gas detector.

 Do not spray cleaning chemicals or insect sprays directly on or near the 

detector, as this may cause the detector to malfunction.

 Do not expose this detector to high concentrations of Freon, other 

CFCs or Volatile Organic Compounds, as over exposure to such 

substances may cause the detector to malfunction.

 Do not expose this detector to silicones, as over exposure to such 

substances may cause the detector to malfunction.

 Do not paint over the Alarm. Doing so may permanently damage the detector.

CAUTION

 Do not listen to alarms with your ear close to the gas detector.

 Do not expose this detector to abnormally strong radio waves/signals, 

like those emitted from amateur radio equipment, as this may cause the 

detector to malfunction.

Target Gas

 This gas detector detects methane gas.

Names and Functions of Parts

Gas Detector Functions

Visual and audible signals will not stop until the product is reset by 

removing and reinstalling the battery.

 

When a gas leak occurs

An alarm sounds when the level of gas in the area of the gas detector 

reaches or exceeds a certain concentration.

 When trouble occurs

When trouble occurs, a trouble alarm sounds.

 When the battery is low

When the battery is low, a low battery alarm sounds.

 When the end of service life is reached

When the end of service life is reached, an end of service life notifi cation is 

issued. 

Usage Instructions

1.  Open the battery cover on the back of the gas detector.

2. Connect the included lithium battery by inserting the battery harness 

connector into the product as shown in the attached illustration.

*  Once the lithium battery is connected, the gas detector’s green LED 

(power) will fl ash once for 1 second.

3.  Insert the lithium battery and close the cover.

4. After the battery is plugged in, the detector will enter an initialization 

period for approximately 30 seconds .  A "Beep" will sound after this 30 

second period and the detector will begin monitoring.

*  The device status will be confi rmed during that 30 second period.

5.  After the 30 second initialization period, press and hold the Test Switch 

for more than 3 seconds to test the alarm.

General Maintenance

This detector has been designed to be as maintenance-free as possible, 

but there are a few simple things you must do to keep it working properly:

 Test it at least once a week.

 Clean the detector at least once a month; gently vacuum the outside 

of the detector using your household vacuum's soft brush attachment. 

Test the alarm. Never use water, cleaners or solvents since they may 

damage the unit.

 Relocate the unit if it sounds frequent unwanted alarms. See "Where 

This Alarm Should Not Be Installed" for details.

 If product enters low battery mode, the batteries must be replaced.  

Batteries in this device are not available in retail. Please call NEW 

COSMOS ELECTRIC CO.,LTD. for replacement batteries.

  In order to replace the battery, open the battery cover on the back of 

the product and gently disconnect the battery harness connector from 

the product.  Follow the Usage Instructions section to install the new 

battery.

4

2

3

1

ML-310INT_(02)_

 Gas detection 

unit

 

Detects a gas 

leak.

 Battery cover 

(transparent)

 

Open to replace 

a battery.

 Production serial number label

 Alarm speaker

 Sounds 

an 

alarm when gas 

leakage, gas 

detector trouble, 

or low battery is 

detected.

 Green LED 

(power)

 

This LED fl ashes 

when the 

test switch is 

pressed.

 Test switch

 

Used to test 

power, alarm 

sounds.

 Red LED 

(alarm)

 

This LED fl ashes 

when gas is 

detected.

 Yellow LED 

(trouble)

 

This LED fl ashes 

when trouble 

occurs, when the 

battery is low, or 

when the end of 

service life has 

been reached.

An alarm sounds every 6 seconds 

stating “Beep Beep Beep Beep 

Danger – gas leak explosion risk – 

evacuate, then call 911.”

Red LED (alarm)

Flashes once every 2 seconds

An alarm sounds every 60 seconds 

stating “Beep Beep Beep Detector 

error”

B y   p r e s s i n g   t h e   s w i t c h   f o r   3 

seconds, an alarm will sound stating 

“Beep Beep Beep Detector error”

An alarm sounds every 60 seconds 

stating “Beep Low Battery”

B y   p r e s s i n g   t h e   s w i t c h   f o r   3 

seconds, an alarm will sound 

stating “Beep Low Battery”

* Batteries in this device are not 

available in retail. Please call 

N E W   C O S M O S   E L E C T R I C 

C O . , L T D . f o r   r e p l a c e m e n t 

batteries.

An alarm sounds every 60 seconds 

stating “Beep Beep Please replace 

detector”

B y   p r e s s i n g   t h e   s w i t c h   f o r   3 

seconds, an alarm will sound 

stating “Beep Beep Please replace 

detector”

Yellow LED (trouble)

Flashes 3 times every 10 seconds

Yellow LED (trouble)

Flashes once every 10 seconds

Yellow LED (trouble)

Flashes twice every 10 seconds

Green LED (power)

Flashes once every second during 

the 30 second initialization period.

A “Beep” sounds 30 seconds after 

power is turned on

Содержание ML-310

Страница 1: ... that the following are observed when a gas alarm sounds There may be a risk of explosion Leave the building immediately opening doors and windows as you leave Take others with you If you are outside when you smell the gas leave the area immediately Avoid causing a spark which might cause the gas to explode 1 Do not remove the connector from the lithium battery 2 Do not light a match or smoke 3 Do...

Страница 2: ...y cause the detector to malfunction Do not paint over the Alarm Doing so may permanently damage the detector CAUTION Do not listen to alarms with your ear close to the gas detector Do not expose this detector to abnormally strong radio waves signals like those emitted from amateur radio equipment as this may cause the detector to malfunction Target Gas This gas detector detects methane gas Names a...

Страница 3: ...then call 911 Red LED alarm Flashes once every 2 seconds An alarm sounds every 60 seconds stating Beep Beep Beep Detector error By pressing the switch for 3 seconds an alarm will sound stating Beep Beep Beep Detector error An alarm sounds every 60 seconds stating Beep Low Battery By pressing the switch for 3 seconds an alarm will sound stating Beep Low Battery Batteries in this device are not avai...

Страница 4: ...maintenance free as possible but there are a few simple things you must do to keep it working properly Test it at least once a week Clean the detector at least once a month gently vacuum the outside of the detector using your household vacuum s soft brush attachment Test the alarm Never use water cleaners or solvents since they may damage the unit Relocate the unit if it sounds frequent unwanted a...

Страница 5: ...Beep Beep Beep When the switch is released Beep Beep Beep Beep Danger gas leak explosion risk evacuate then call 911 will sound twice Red LED alarm Flashes once every 2 seconds What to do when the alarm Beep Beep Beep Beep Danger gas leak explosion risk evacuate then call 911 sounds DANGER Make sure that the following are observed when a gas alarm sounds There may be a risk of explosion Leave the ...

Страница 6: ...ters from the ceiling Air movement around the detector must not be impeded by items hanging from the ceiling or near the ceiling such as curtains drapes ceiling fans The detector should not be installed in the peak of a cathedral ceiling Wall Mounting Tools you will need Drill with 3 16 or 5mm drill bit Phillips head screwdriver hammer 1 Choose a location on the wall between 6 inches 0 15 meters t...

Страница 7: ...oom return or HVAC duct In an area where the temperature will drop below 32 F 0 C or exceed 122 F 50 C In an area that is dusty or dirty In an area where organic solvents exist In a damp or very humid location Troubleshooting Symptom Cause Action The green LED does not flash even when the switch is pressed Battery connector not plugged in Plug in the battery con nector Battery is low Replace the g...

Страница 8: ...LED flashes once every 10 seconds Low battery sounds Beep Low battery every 60 seconds Alarm push button function Product produces Gas alarm signal when the switch is pressed for more than 3 seconds End of service life Yellow LED flashes twice every 10 seconds End of service life sounds Beep Beep Please replace detector every 60 seconds Battery removal indica tor The battery removal indicator will...

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