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Early warning fire detection is best achieved by the installation of fire detection equipment 
in all rooms and areas of the household as follows: A smoke alarm installed in each separate 
sleeping area (in the vicinity of, but outside of, the bedrooms); and, as appropriate, heat 
or smoke alarms in living rooms, dining rooms, kitchens, hallways, attics, furnace rooms, 
closets, utility storage rooms, basements and attached garages. Test the alarms weekly to 
assure proper operation.

HOW TO INSTALL

IMPORTANT: Read all instructions before using this product.

CAUTION: This smoke alarm is sealed. The cover is not removable.

1.  A mounting bracket is provided on the back of the alarm. Remove the mounting bracket from 

the back of the alarm by holding the mounting bracket and twisting the alarm in the direction 
indicated by the “TWIST TO REMOVE” arrow on the side of the alarm base. 

2.  Attach the mounting bracket in the proper location on the wall or ceiling (screws and anchors 

provided. 

3.  Activate the Permanent Power battery feature by removing and discarding the battery pull tab. 

The alarm will sound one long beep to confirm it is powered up. Once activated, the alarm 

cannot be turned off without permanent deactivation. The alarm will remain on for the next ten 
years (under normal operating conditions).

4.  Press the Test/Silence button. The alarm will sound 3 beeps, 2 second pause, 3 beeps and 

the red power LED will blink in sync with the cycle of 3 beeps and turn off.

5.  Push and twist the alarm clockwise onto the mounting bracket.
6.  The red LED will blink on approx. every 2 minutes to indicate proper operation.
7.  Refer to Locking/Tamper feature to utilize the optional 

alarm 

tamper resistant feature.

This alarm will not work until it is activated and properly installed. This alarm 
should be tested immediately after installation and then tested weekly after 
that. If the alarm ever fails to test correctly, have it replaced immediately. If 
the alarm is not working properly, it cannot alert you to a problem. This alarm 
must have battery power to operate. If the battery is dead, the alarm cannot 
operate. The sealed battery cannot be replaced.

Failure to properly install and activate this alarm will prevent proper operation of this alarm 
and will prevent its response to fire hazards.

Test the alarm following installation and weekly thereafter. The built-in test switch accurately tests 
the alarm operation as required by ANSI/UL217 Standards for Safety. If, at any time, you test the 
alarm and it does not perform as described, replace it immediately. 

CAUTION:

  Due to the loudness 

of the alarm, we suggest that you place your fingers over the sounder opening while testing your 

alarm. Continuous exposure to the high sound level of this alarm over an extended period of time 
may cause hearing loss.

OPTIONAL 

ALARM 

TAMPER RESISTANT FEATURE:

 The tamper resistant locking feature for this   

 

model 

deters someone from removing the alarm from the mounting bracket. The breakaway locking  

pin 

is clearly marked and molded into the mounting bracket. Refer to Figure 1.

TO ACTIVATE THE ALARM LOCKING FEATURE:

 Do not activate the locking feature until you 

have activated the battery, mounted the smoke alarm to the bracket and tested the smoke alarm. 
Refer to OPERATION, TESTING & MAINTENANCE instructions on Page 5.

AVOID THESE LOCATIONS

•  the garage – products of combustion are produced when you start your vehicle.
•  near appliances or areas where normal combustion regularly occurs (kitchens, near furnaces, gas hot 

water heaters). Use smoke alarms with 

U.S.S.T.

®

 or photoelectric sensors, or smoke alarms with Silence 

Feature for these areas.

•  in areas with high humidity, like bathrooms or areas near dishwashers or washing machines. Install at 

least 3 feet (0.9 meters) away from these areas.

•  in areas of turbulent air such as air returns or heating and cooling supply vents, smoke alarms shall 

not be located where airflow prevents smoke from reaching the alarms.

•  in  extremely  dusty,  dirty  or  insect-infested  areas.  Loose  particles  interfere  with  smoke  alarm 

operation.

•  in areas where temperature may fall below 40

0

F (4.4

0

C) or rise above 100

0

F (37.8

0

C).

•  closer than 1 foot (0.3m) from fluorescent lights, electrical "noise" and flickering may affect the alarm's 

operation.

•  closer than 3 feet (0.9m) horizontal path from the tip of the blade of a ceiling suspended (paddle) fan.
•  on a poorly insulated ceiling or exterior wall (mount smoke alarm on an inside wall). 

Summary of Contents for MI3050S

Page 1: ...larm This alarm does not require battery changes The tamper proof permanent power sealed battery which will last for approximately 10 years This manual in cludes important information regarding where to install the alarm how to operate maintenance testing and product features It also in cludes tips and information which can help protect you and your family Conforms to UL Std 217 Single Station Smo...

Page 2: ...ure their lives and properties l SMOKE ALARMS CANNOT DETECT FIRES IF THE SMOKE DOES NOT REACH THEM Smoke from fires may not reach the sensing chamber and set off the alarm One alarm should be installed inside each bedroom or sleeping area Do not obstruct airflow around the smoke alarm or place in areas of obstructed airflow l BEAWARE OF VARIOUS SITUATIONSAGAINST WHICH THE SMOKEALARM MAY NOT BE EFF...

Page 3: ... 4 in 102 mm vertically to the peak Sloped Ceilings Shed Ceilings Smoke alarms or smoke detectors mounted on a sloped ceiling having a rise greater than 1 ft in 8 ft 1 m in 8 m horizontally shall be located within 36 in 914 mm of the high side of the ceiling but not closer than 4 in 102 mm from the adjoining wall surface Tray Shaped Ceilings Smoke Alarms or smoke detectors shall be installed on th...

Page 4: ...ed battery cannot be replaced Failure to properly install and activate this alarm will prevent proper operation of this alarm and will prevent its response to fire hazards Test the alarm following installation and weekly thereafter The built in test switch accurately tests the alarm operation as required by ANSI UL217 Standards for Safety If at any time you test the alarm and it does not perform a...

Page 5: ...t button should sound the alarm immediately after it is pressed There are special conditions that when you press the Test Silence button you will experience a delay of approx 10 15 seconds before the alarm sounds This delay occurs if the Test Silence button is pressed during a self diagnostic period This may occur after initial power up Retest after 10 15 seconds ALARM ORIGINATION The QUICK FIND f...

Page 6: ...e alarm DO NOT paint the alarm Doing so may permanently damage the alarm and interfere with alarm s ability to sense smoke The outside can be wiped with a damp cloth DO NOT use any household cleaning agents solvents or sprays including compressed gas dusters or any other chemical on or near your alarm DO NOT disassemble or attempt to clean inside the alarm This alarm contains no serviceable parts ...

Page 7: ... is located in the mounting bracket of the alarm See Figure2 3 Use a small flat blade tool to remove the deactivation key breakaway from the mounting bracket 4 Push tip of key into the deactivation slot keyhole outline on label and insert fully 5 Turn key clockwise to the off position slowly until you feel the switch actuate and the key stops turning 6 This will discharge the alarm battery and sto...

Page 8: ...rm Code NFPA 72 reads as follows 11 5 1 Required Detection Where required by applicable laws codes or standards for a specific type of occupancy approved single and multiple station smoke alarms shall be installed as follows 1 In all sleeping rooms and guest rooms 2 Outside of each separate dwelling unit sleeping area within 6 4 m 21 ft of any door to a sleeping room the distance measured along a ...

Page 9: ...THIS PRODUCT CONFORMS TO UL STANDARD 217 FOR SAFETY 3 Beeps 2 second pause Repeat Blinks On in sync with Horn If hazard is identified please take all precautions if an alarm sounds by calling an Emergency Service and getting out of the home 3 Beeps 2 second pause Repeat Silence Feature is activated by pressing and releasing the Test Silence button on the initiating alarm while in alarm condition S...

Page 10: ...pplied with this product ALARM RETURNS For replacement of this alarm under the terms of this Warranty contact the Customer Service Department at 800 390 4321 extension 238 to obtain the current postage and handling fees USI does not warrant and specifically disclaims any warranty whether express or implied of fitness for a particular purpose other than the warranty contained herein No implied warr...

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