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Page 5

OPERATION, TESTING & MAINTENANCE

OPERATION:

 The smoke alarm is operating once the battery power is connected by removing the 

pull-tab. When products of combustion are sensed, the alarm sounds a loud alarm which continues 
until the air is cleared.
This alarm incorporates the NFPA recognized horn signal for evacuation. During alarm mode, the 
horn produces three beeps followed by a two second pause and then continually repeats.

READY/ACTIVE CONDITION:

 The red LED blinks on once approx. every 2 minutes to indicate 

the alarm is properly functioning.

ALARM CONDITION:

 The alarm emits a loud, pulsating alarm sound and the red LED blinks on 

in sync with horn.

NUISANCE ALARMS:

 

The smoke alarm is designed to minimize nuisance alarms. Smoking will 

not normally set off the alarm unless smoke is blown directly into the smoke alarm. Combustion 
particles from cooking may set off the alarm if the smoke alarm is located close to the kitchen cooking 
surface. Large quantities of combustion particles are generated from spills or broiling.

If the smoke alarm does sound, check for fires first. If a fire is discovered, get out and call the fire 
department. If no fire is present, check to see if one of the reasons listed above may have caused 

the alarm. Use the Silence Feature if it is a nuisance alarm, or reset the alarm by pressing and 
holding the Test/Silence button for ten seconds. Refer to RESET below.

NOTE:

  It  is  best  to  "reset"  the  alarms  before  initial  test  is  performed.  See  below  for  Reset 

procedures.

TESTING:

 Test  by  pressing  the Test/Silence  button  on  the  smoke  alarm  cover  until  the  alarm 

sounds, then release. The alarm sounds if all electronic circuitry, horn and battery are working. If 
no alarm sounds, the alarm may have a power supply failure. 

Test the smoke alarm weekly to 

assure proper operation. IMPORTANT: 

Under normal conditions, the test 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

®

  feature  will  allow  you  to  immediately  locate  the 

originating  alarm  (once  the  alarm  has  stopped  sounding).  To  initiate  QUICK  FIND

®

,  press  the 

Test/Silence button on each alarm. After releasing the button, the originating alarm will continue to 
sound for 60 seconds. It is necessary to test each alarm to determine the originating alarm.

RESET:

 

To reset the QUICK FIND

®

 Alarm Origination condition, press and hold the Test/

Silence button on any alarm for at least 10 seconds and then release. This will clear alarm 
origination indicator. Reset after each alarm activation.
END-OF-SERVICE LIFE NOTIFICATION:

 A majority of home fire deaths are a result of no smoke 

alarms or no 

working

 smoke alarms. In addition to the "replace by date" stamped on the back of 

your alarm, your alarm contains a unique audible end-of-service life notification feature. When it 

is time to replace your alarm, which is after approximately 10 years of operation from initial power 
up, the alarm will sound 2 chirps approx. every 60 seconds and the red LED will blink on once 
approx. every 2 minutes. The alarm should be replaced immediately.

2.  Insert the pin into the hole in the side of the alarm after the alarm has been installed on the 

mounting plate. Refer to the diagram below for correct placement.

1.  Detach the breakaway alarm locking pin from the mounting bracket.

TO DEACTIVATE THE LOCKING FEATURES:

 To remove the smoke alarm for cleaning or servicing, 

you must first remove the locking pin, if it has been installed.

1.  Use long nose pliers to pull the locking pin out of the hole.
2.  It is now possible to remove the smoke alarm.

INSERT ALARM 

LOCKING PIN HERE

(optional)

FIGURE 1

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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