Universal Security Instruments 3303 User manual

SMOKE & FIRE ALARM WITH SILENCE FEATURE
AND ALARM ORIGINATION FEATURE
Table of Contents:
Page #
Smoke Alarm Limitations and Functions ................................. 2
Recommended Location of Alarms ......................................... 3
Avoid These Locations ........................................................... 4
Early Warning ......................................................................... 4
Installation Instructions ........................................................... 4
Electrical Shock Hazard ......................................................... 4
Locking/Tamper Feature ......................................................... 4
Wiring Instructions .................................................................. 5
Operation, Testing & Maintenance .......................................... 6
QUICK FIND®Alarm Originating Feature & Reset .................. 6
Cautions/Warnings ................................................................. 7
Develop and Practice a Plan of Escape .................................. 8
Operational Summary ............................................................. 9
Warranty ................................................................. Back Cover
SECURITY INSTRUMENTS, INC.
MODEL 3303
MODEL 3885
READ ALL INSTRUCTIONS

SMOKE ALARM LIMITATIONS AND FUNCTIONS
There are three basic smoke alarm types: IoPhic , Ionization and Photoelectric.
IoPhic is an ionization alarm containing a patent-pending Universal Smoke Sensing Technology.
IoPhic alarms are very effective at detecting fast flaming fires and also respond very quickly to
slow smoldering fires - up to 87% faster than the maximum allowable alarm limit (UL217 Smoldering
Smoke Test on 5/26/2010, Underwriters Laboratories Project #09CA38078).
Ionization smoke alarms are typically more effective at detecting fast flaming fires - fires which consume
combustible materials rapidly and spread quickly. Sources of these fires may include paper burning in a
wastebasket, or kitchen grease fires.
Photoelectric smoke alarms, on the other hand, are typically more effective at detecting slow smoldering
fires - fires which burn for hours before bursting into flame. Sources of these fires may include cigarettes
burning in couches or bedding.
Installing IoPhic smoke alarms ensures maximum detection of both types of fires from a single alarm,
while eliminating the need for a combination of ionization and photoelectric smoke alarms.
The enclosed alarm is a Photoelectric smoke alarm.
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SMOKE ALARMS WILL NOT WORK DURING A LOSS OF POWER. SINCE A SMOKE ALARM WILL
NOT WORK WITHOUT POWER, having an alarm(s) that works from two completely different power
sources, such as an AC direct wire with battery backup smoke alarm, can give you an extra measure of
protection in case of an AC power failure or a dead battery. Battery operated alarms cannot work if the
batteries are missing, disconnected or dead, if the wrong type of batteries are used or if the batteries are
not installed correctly. AC (only) powered alarms cannot work if the AC power is cut off for any reason. If
you are concerned about the limitations of the battery or AC power, install both types of alarms.
USING AN IONIZATION SMOKE ALARM IN A SMOKY AREA, SUCH AS A KITCHEN, OR IN A HIGH
HUMIDITY AREA NEAR A SHOWER, CAN CAUSE NUISANCE FALSE ALARMS. IT IS PREFERABLE
TO USE PHOTOELECTRIC ALARMS IN THESE AREAS. DO NOT TURN OFF THE AC POWER TO
QUIET THE ALARM. A SMOKE ALARM WILL NOT HELP PROTECT YOU IF IT IS NOT POWERED.
Properly locate your alarm to avoid nuisance alarms.
A SMOKE ALARM MAY NOT ALWAYS WARN YOU ABOUT FIRES CAUSED BY CARELESSNESS
AND SAFETY HAZARDS LIKE SMOKING IN BED, VIOLENT EXPLOSIONS, ESCAPING GAS,
IMPROPER STORAGE OF FLAMMABLE MATERIALS, OVERLOADED ELECTRICAL CIRCUITS,
CHILDREN PLAYING WITH MATCHES, NATURAL CAUSES SUCHAS LIGHTNING, OR ARSON. FIRE
PREVENTION IS YOUR BEST SAFEGUARD.
INSTALLING SMOKE ALARMS MAY MAKE YOU ELIGIBLE FOR LOWER INSURANCE RATES, BUT
SMOKE ALARMS ARE NOT ASUBSTITUTE FOR INSURANCE. Homeowners and renters alike should
continue to insure their lives and properties.
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.
BE AWARE OF VARIOUS SITUATIONS AGAINST WHICH THE SMOKE ALARM MAY NOT BE
EFFECTIVE. For example: (1) Fires where the victim is intimate with a flaming initiated fire; for example,
when a person's clothes catch fire while cooking; (2) Fires where the smoke is prevented from reaching
the alarm due to a closed door or other obstruction or (3) Incendiary fires where the fire grows so rapidly
that an occupant's egress is blocked even with properly located alarms.
SMOKE ALARMS MAY NOT DETECT FIRE ON ANOTHER FLOOR OR AREA OF THE HOME.
Recommended minimum protection is at least one smoke alarm in every sleeping area and every bedroom
on every level of your home. Interconnected smoke alarms may provide earlier warning than stand-alone
smoke alarms since all smoke alarms alarm when one detects smoke.
SMOKEALARMS MAY NOT BE HEARD. The alarm horn in this alarm meets or exceeds current standards,
but it may not be heard if: (1) the smoke alarm is located outside a closed or partially closed door; (2)
residents recently consumed alcohol or drugs; (3) the alarm is drowned out by noise from stereos, TV's,
air conditioners or other appliances; (4) residents are hearing impaired or (5) if residents are sleeping.
CURRENT STUDIES HAVE SHOWN SMOKE ALARMS MAY NOT AWAKEN ALL SLEEPING
INDIVIDUALS AND THAT IT IS THE RESPONSIBILITY OF INDIVIDUALS IN THE HOUSEHOLD WHO
ARE CAPABLE OF ASSISTING OTHERS TO PROVIDE ASSISTANCE TO THOSE WHO MAY NOT BE
AWAKENED BY THE ALARM SOUND OR TO THOSE WHO MAY BE INCAPABLE OF SAFELY
EVACUATING THE AREA UNASSISTED.
SMOKE ALARMS ARE NOT FOOLPROOF. You must test the smoke alarm weekly to ensure your
continued protection. Smoke alarms cannot prevent or extinguish fires.
SMOKE ALARMS HAVE A LIMITED LIFE. The smoke alarm should be replaced immediately if it is not
operating properly. You should always replace a smoke alarm after 10 years.
SMOKE ALARMS ARE NOT TO BE USED WITH DETECTOR GUARDS UNLESS THE COMBINATION
HAS BEEN EVALUATED AND FOUND SUITABLE FOR THAT PURPOSE.

RECOMMENDED LOCATION OF ALARMS
• Locate the first smoke alarm in the immediate area of the bedrooms. Try to protect the escape
route as the bedrooms are usually farthest from an exit. If more than one sleeping area exists,
locate additional smoke alarms in each sleeping area. If a hall is more than 40 feet (12 meters)
long, install a smoke alarm at each end.
• Locate additional smoke alarms to protect any stairway as stairways act like chimneys for
smoke and heat.
• Locate at least one smoke alarm on every floor level.
• Locate a smoke alarm in any area where a smoker sleeps or where electrical appliances are
operated in sleeping areas.
• Smoke, heat and other combustion products rise to the ceiling and spread horizontally. Mounting
the smoke alarm on the ceiling in the center of the room places it closest to all points in the room.
Ceiling mounting is preferred in ordinary residential construction. However, in mobile homes, wall
mounting on an inside partition is preferred to avoid the thermal barrier that may form at the ceiling.
• When mounting smoke alarm on the ceiling, locate it a minimum of 4" (10cm) from a side wall or
corner (see Diagram A).
• When mounting smoke alarm on a wall, if local codes allow, use an inside wall with the top edge
of the smoke alarm a minimum of 4" (10cm) and a maximum of 12" (30.5cm) below the ceiling/
wall intersections (See Diagram A).
Page 3
Sloped Ceilings (Peaked Ceilings):
Smoke alarms or smoke detectors mounted on a peaked ceiling shall be located within 36 in. (914 mm)
horizontally of the peak, but not closer than 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 the highest portion of the ceiling or on the sloped
portion of the ceiling within 12 in. (305 mm) vertically down from the highest point.
Mobile Home Installation:
For minimum protection, smoke alarms should be installed in compliance with H.U.D. Manufactured Home
Construction Safety Standards, Title 24 CFR, Section 3280.208 and Section 3282. For additional protection,
see Single Story Residence smoke alarm requirements/recommendations for Existing Homes and New
Construction Homes.
Note: For mobile homes built before 1978, install smoke alarms on inside walls between 4” and 12” from
the ceiling (older mobile homes have little or no insulation in the ceiling). This is especially important if the
ceiling is unusually hot or cold.
Install a smoke alarm inside each bedroom and in the hallway outside each separate sleeping area.
Existing Homes:
The NFPA requires a smoke alarm on every level and outside each sleeping area in existing construction.
An existing household with one level and one sleeping area is required to have one smoke alarm.
New Construction Homes and Manufactured Homes:
The NFPA requires AC-powered, interconnected smoke alarms to be installed inside each bedroom, outside
each bedroom area, and on every level of the home. They also require a minimum of two AC-powered,
interconnected smoke alarms in any new construction home.

THIS SMOKE ALARM WILL NOT WORK WITHOUT 120 VAC POWER. THE
SMOKE ALARM SHOULD BE TESTED WHEN INSTALLED AND THEN TESTED
WEEKLY AFTER THAT.
INSTALLATION INSTRUCTIONS: CAUTION!! READ CAREFULLY.
Installation of this alarm must conform to the electrical codes in your area; Article 760 of the
National Electrical Code, NFPA 72, 101; SBC (SBCCI); UBC (ICBO); NBC (BOCA): OTFDC
(CABO), and any other local or building codes that may apply. Wiring and installation must
be performed by a licensed electrician. Failure to follow these guidelines may result in injury
or property damage.
This alarm must be powered by a 24-hour, 120VAC 60Hz circuit. Be sure the circuit cannot be
turned off by a switch, dimmer or ground fault circuit interrupter. Failure to connect this
alarm to a 24-hour circuit may prevent it from providing constant protection.
IMPORTANT: Do not subject this smoke alarm to megger, high voltage or high-pot tests.
Remove the smoke alarm(s) before high-potting tests occur on the circuit or system.
(Ref. Section 550-17, National Electric Code, 2002 Edition).
ELECTRICAL SHOCK HAZARD
Turn off power to the area where you will install this alarm at the circuit breaker or fuse box
before beginning installation. Failure to turn off the power before installation may result in
serious electrical shock, injury or death.
CAUTION: THIS SMOKE ALARM IS SEALED. THE COVER IS NOT REMOVABLE!
• 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 "TWISTTO REMOVE" arrow on the side of the
alarm base.
OPTIONAL TAMPER RESISTANT FEATURE: There is a separate tamper resistant locking feature
provided for this model. Activating this feature deters someone from removing the smoke alarm
from the mounting bracket. The breakaway locking pin is clearly marked and molded into the mounting
bracket. Refer to the diagram on the next page.
TO ACTIVATE THE LOCKING FEATURE: Do not activate the locking feature until you have mounted
the smoke alarm to the bracket and tested the smoke alarm. Refer to OPERATION, TESTING &
MAINTENANCE instructions on Page 6.
1. Detach the breakaway alarm locking pin from the mounting bracket.
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 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 400F (4.40C) or rise above 1000F (37.80C).
• 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).
Page 4
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.

DO NOT TAMPER WITH WIRES WHEN POWER IS ON!
For alarms that are used as single smoke alarms, do not connect the yellow wire to anything.
Insulate this wire (tape it) in place to make certain the yellow wire cannot contact any metal parts.
IInterconnected alarms can provide earlier warning of fire than stand-alone alarms, especially
if a fire starts in a remote area of the dwelling. When alarms are interconnected, all alarms
will sound when one alarm first goes into alarm. This alarm may be interconnected with a
total of not more than 24 interconnected devices, i.e., as many as 11 other USI ELECTRIC or
UNIVERSAL model smoke alarms or combination smoke and carbon monoxide (CO) alarms;
6 other initiating smoke alarms which may be a combination of USI ELECTRIC or UNIVERSAL
CO Alarms and Heat Alarms; and six other non-initiating devices such as USI ELECTRIC
Relay Modules. Compatible models include: 2995, 5304, MI100, MI106, MDS101, MDS107,
MDS211, 2985, 5303, MI200, MI210 USI-1103, USI-1203, USI-1204, USI-1208 (Part #USI-1209),
USI-1213, USI-3204, USI-7385, USI-7390, USI-7485, USI-7490, USI-7795, USI-2430, USI-960,
SS-785, SS-790, SS-795, SS-2795, SS-2895, CD-9385, CD-9390, CD-9485, CD-9490, CD-9795,
HD-130, RM-100.
Interconnected CO alarms or CO alarm circuit of combination smoke and CO alarms will only
respond if a CO alarm / event initiates the alarm. All other alarms remain silent.
Interconnected smoke alarms, heat alarms and relay modules will only respond if a smoke
alarm / event or heat alarm / event initiates the alarm. All CO alarms remain silent.
Note that smoke alarms without battery backup will not respond during an AC power failure.
NOTE: Relay Modules/USI-960 will not respond if a CO alarm / event initiates the alarm.
2. Insert the pin into the hole for the feature you are activating. Refer to the diagram below for
correct placement.
TO DEACTIVATE THE LOCKING FEATURE: To remove the smoke alarm for cleaning or servicing,
you must first remove the locking pin, if it has been installed.
1. Turn off AC power to the circuit.
2. Use long nose pliers to pull the locking pin out of the hole.
3. It is now possible to remove the smoke alarm.
WIRING INSTRUCTIONS:
1. a. The appropriate power supply is 120 Volt single phase power supplied from a non-switchable
circuit NOT protected by a ground fault circuit interrupter.
b. Turn off AC power to the circuit before wiring the smoke alarm.
c. There are three pigtail wires (black, white and yellow) coming from the AC QUICK
CONNECTOR. The proper wire connection is as follows:
WIRES FROM QUICK CONNECTORCONNECT TO
BLACK "HOT" side of AC line
WHITE "NEUTRAL" side of AC line
YELLOW Interconnect wires of other smoke alarms
Page 5
INSERT ALARM
LOCKING PIN HERE
ALARM/BRACKET
LOCKING PIN

OPERATION, TESTING & MAINTENANCE
OPERATION: The smoke alarm is operating once theAC power is connected and turned on. 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 40-45 seconds to indicate
the alarm is properly functioning.
LOCAL ORIGINATING ALARM CONDITION: The red LED blinks on approx. every 2 seconds and
the alarm emits a loud, pulsating alarm sound.
NON-ORIGINATING ALARM CONDITION: The red LED is off and the alarm emits a loud, pulsating
alarm.
GREEN LED: The green LED is on whenever AC power is turned on.
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 button for ten seconds. Refer to RESET on Page 7.
TESTING: Test by pushing the Test button on the smoke alarm cover until the alarm sounds, then
release. If no alarm sounds, the alarm may have a power supply failure. Test the smoke alarm
weekly to assure proper operation.
ALARM ORIGINATION: The QUICK FIND®Alarm Origination Feature allows the user to identify
the initiating alarm smoke alarms in an interconnected alarm system. If an interconnected alarm
system is initiated by one of the alarms, when the alarm system exits alarm condition, the user can
identify the initiating alarm by:
a. Pressing and releasing the test button on any alarm in the system.
b. Interconnected alarms will sound and then stop.
c. The originating smoke alarm will continue to sound 60 seconds to allow ample time to quickly
find originating alarm.
Page 6
The yellow wire is used only for multiple station operations with USI ELECTRIC or UNIVERSAL
Model alarms only. Connecting this yellow wire to any other circuits may result in damage
and alarm malfunction. When alarms are interconnected, all alarms must be powered from a
single AC branch circuit. If local codes do not permit, be sure the neutral wire is common to
both phases. The maximum wire run distance between the first and last alarm/device in an
interconnected system is 1,000 feet. NOTE: Use standard household wire (18 gauge or larger,
rated at least 300V, as required by local codes) available at all electrical supply/hardware
stores.
The wiring to be used shall be in accordance with the provisions of Articles 210 and 300.3(B)
of the National Electrical Code, ANSI/NFPA 70. In addition, the resistance of the interconnecting
wiring shall be a maximum of 10 Ohms.
2. Attach the mounting bracket to the electrical junction box.
3. Plug the AC QUICK CONNECTOR into the alarm base. Push and twist the alarm clockwise
onto the mounting bracket.
4. See "OPTIONAL TAMPER RESISTANT FEATURES" and "TO ACTIVATE THE LOCKING
FEATURES" instructions on Page 4.
5. Turn on AC power and check the LED's for proper operation. The green LED should be on to
indicate AC power. The red LED blinks on once approx. every 40 seconds to indicate proper
operation.

Page 7
RESET: To reset the QUICK FIND®Alarm Origination condition, press and hold the Test button
on any alarm for at least 10 seconds and then release. Reset after each alarm. The reset
feature will reset all interconnected units.
TROUBLE/SERVICE ALARM: If the smoke alarm beeps 3 times approx. every 40 seconds after
the red LED flashes and cannot be restored to normal operation, the smoke alarm should be replaced.
If you choose to use an aerosol smoke product to test the smoke alarm, be certain to use one
that has been Listed to Underwriters Laboratories, Inc. Safety Standards and use it only as
directed. Use of non-UL Listed products or improper use of UL Listed products may affect
the smoke alarm's sensitivity.
NUISANCE ALARM SILENCE FEATURE: This feature is to be used only when a known alarm
condition, such as smoke from cooking, activates the smoke alarm. The smoke alarm Silence
Feature is activated by pushing and releasing the Silence button on the smoke alarm cover while in
alarm condition. The smoke alarm will automatically reduce sensitivity and the red LED will blink on
approx. every 2 seconds to indicate the alarm is in the Silence mode. The smoke alarm will gradually
regain normal sensitivity and sound the alarm if particles of combustion are still present. The Silence
feature may be used repeatedly until the air has cleared, by pushing and releasing the Silence
button again. Resetting the smoke alarm after a nuisance alarm is recommended.
NOTE: If the Test button is pressed and held during the Silence mode, the smoke alarm will be
tested normally. Upon the release of the Test button, the Silence mode will be restarted.
Before using the alarm Silence Feature, identify the source of smoke and be certain that safe
conditions exist.
(UTHA) MAINTENANCE:
The smoke alarm is virtually maintenance free. However, under dusty conditions, a vacuum hose
may be used to clear the sensing chamber of dust.
Clean the smoke alarm at least once a month to remove dust, dirt, insects or debris. Always turn
off power to smoke alarm before cleaning. Using a soft brush or wand attachment to a vacuum
cleaner, vacuum all sides and cover of smoke alarm. Be sure all the vents are free of debris.
If the smoke alarm is false alarming and cannot be restored to normal operation, the smoke alarm
should be replaced.
NEVER use an open flame of any kind to test this smoke alarm. You might accidentally damage
or set fire to the smoke alarm or to your home. The built-in test switch accurately tests the
smoke alarm's operation as required by Underwriters Laboratories Inc. (UL).
(UTHA) Sensitivity Indicating Means
The sensitivity indicating means for this Smoke and Fire Alarm is the use of the analyzer for Smoke
Detectors Model 501-A or 501-A/Bat Aerosol Generator Manufactured by Gemini Scientific Corp.,
1122-B Aster Ave., Sunnyvale, CA 94086.
The Equivalent UL 268 Light obscuration %/Ft as measured by this instrument must be within the
obscuration listed on the back of this alarm.
(UTHA) Go/No-Go Field Test
The Go/No-Go test for this smoke and fire alarm is to use one of the following UL listed can-type
aerosol smoke alarm testers. The instructions for use are printed on the canister. Home Safeguard,
Model 25S.

DEVELOP AND PRACTICE A PLAN OF ESCAPE
BASICS OF ESCAPE PLAN
o Make a floor plan indicating all doors and windows and at least two escape routes from each
room. Second story windows may need a rope or chain ladder.
o Have a family meeting and discuss your escape plan, showing everyone what to do in case of fire.
o Determine a place outside your home where all of you can meet if a fire occurs.
o Familiarize everyone with the sound of the smoke alarm and train them to leave your home when
they hear the sound.
o Identify children's bedrooms with red stickers placed in the upper left corner of the windows. They
are available from your local fire department.
o Practice a fire drill at least every six months. Practice allows you to test your plan before an
emergency. You may not be able to reach your children. It is important they know what to do!
WHAT TO DO WHEN THE ALARM SOUNDS
o Leave immediately by your plan of escape. Every second counts, so don't waste time getting
dressed or picking up valuables.
o In leaving, don't open any inside door without first feeling its surface. If hot, or if you see smoke
seeping through cracks, don't open that door! Instead, use your alternate exit. If inside door is
cool, place your shoulder against it, open it slightly and be ready to slam it shut if heat and smoke
rush in.
o Stay close to the floor if air is smoky. Breathe shallowly through a cloth, wet if possible.
o Once outside, go to your selected meeting place and make sure everyone is there.
o Call the fire department from your neighbor's home – not from yours!
o Don't return to your home until fire officials say that it is all right to do so.
Page 8
REPAIRS AND SERVICES
If the smoke alarm is defective in any way, do not tamper with the smoke alarm. Return the smoke
alarm for servicing. (See warranty for instructions or in-warranty returns.) There will be a service
charge for repairing out of warranty smoke alarms.
NATIONAL FIRE PROTECTION ASSOCIATION REQUIRED INFORMATION
For your information, the National Fire Alarm 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 path of travel
(3) On every level of a dwelling unit, including basements.
(4) On every level of a residential board and care occupancy (small facility), including basements
and excluding crawl spaces and unfinished attics
(5) *In the living area(s) of a guest suite
(6) In the living area(s) of a residential board and care occupancy"
The equipment should be installed using wiring methods in accordance with the
National Fire Protection Association's Standard 72.
(National Fire Protection Association, Batterymarch Park, Quincy, MA 02269)
FCC PART 15 RADIO FREQUENCY DEVICES
This equipment has been tested and found to comply with the limits for a Class B digital device
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications,

However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
CAUTION (AS REQUIRED BY THE CALIFORNIA STATE FIRE MARSHAL)
"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 heat or smoke detectors in the living rooms, dining rooms, bedrooms, kitchens, hallways, attics, furnace
rooms, closets, utility and storage rooms, basements and attached garages.
THIS PRODUCT IS LISTED TO UL STANDARD FOR SAFETY,
UL217 BY UNDERWRITERS LABORATORIES, INC.
Page 9
Blinks On once
approx every
40-45 seconds
Stays On AC Power is present.
Off Off AC Power is not present. Check the breaker or fuse
box for power. If the breaker or fuse box looks normal,
call a licensed electrician for assistance.
OPERATIONAL SUMMARY
Silent
Silent
Blinks On
approx every
2 seconds
Stays On Nuisance Alarm - If there is no hazard present, verify
the alarm is mounted in the correct location (see User's
Manual, "AVOID THESE LOCATIONS" section). Reset
alarm as instructed below.
Horn does not
sound when other
alarms are active
or horn does not
sound when
inter-connected
alarm's test
button is pressed
Blinks On once
approx every
40-45 seconds
Stays On
or Off
Press and hold the smoke alarm Test/Silence button
for at least 5 seconds. If still no alarm, turn offAC Power
at the circuit breaker or fuse box and disconnect the
alarm from the mounting bracket and make sure the
connector plug is securely attached on units that did
not alarm. If still no alarm, have a licensed electrician
check to see if the yellow wire is connected to the neutral
wire.
3 Beeps,
2 second pause,
Repeat
Blinks On
approx every
2 seconds
Stays On Originating Smoke Alarm - 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
Off Stays On Non-originating Smoke Alarm -Another interconnected
smoke alarm has sensed smoke, causing all
interconnected units to sound.
Blinks On once
approx every
40-45 seconds
(normal operation
mode) or Blinks on
once approx every
10 seconds
(silence mode)
Stays On
Stays On To Reset the Alarm - Hold the Test/Silence button for 10
seconds. This will clear alarm origination and clear
Silence mode. Reset after each smoke alarm event.
Silent
3 Beeps,
2 second pause,
Repeat
3 Beeps,
2 second pause,
Repeat
Stays On Silence Feature is activated by pressing and releasing
the Test/Silence button on the initiating alarm while in
alarm condition. Silence mode will last for approx 8-12
minutes.
Blinks On
approx every
2 seconds
Silent
(alarmed
previously)
CONDITION OF ALARM AUDIBLE & VISUAL SIGNALS BEFORE SOLUTION / RECOMMENDATION
SOLUTION / RECOMMENDATION
HORN RED LED GREEN LED
Blinks On once
approx every
40-45 seconds
(normal operation
mode) or Blinks on
once approx every
10 seconds
(silence mode)
QUICK FIND®Alarm Origination - In an interconnected
system, it is difficult to determine which alarm initiated
the alarms to sound. The QUICK FIND®feature will
allow you to immediately locate the originating alarm
(once the alarms have stopped sounding). To initiate
QUICK FIND®, press the Test/Silence button on any
alarm; and, after releasing the button, the originating
alarm will continue to sound for approx 60 seconds.
Reset the originating alarm. NOTE: In a non-
interconnected installation, it is necessary to test each
alarm to determine the originating alarm.
Blinks On once
approx every
40-45 seconds
3 Chirps approx
every 40 seconds
after LED flashes
Stays On Trouble/Service Alarm. Replace Alarm.

*
288-3477-00
©2010, UNIVERSAL SECURITY INSTRUMENTS, INC.
Printed in China
Visit Us on the Web! www.UsiElectric.com
11407 Cronhill Drive, Suite A
Owings Mills, Maryland 21117 USA
THREE YEAR LIMITED WARRANTY
MODELS 3303, 3885
USI ELECTRIC, INC./UNIVERSAL SECURITY INSTRUMENTS, INC. ("USI") warrants
your USI product to be free from defects in material and workmanship for a period of
three (3) years from the date of purchase.
This warranty applies only to the original consumer purchaser and only to products used in
normal residential use and service. If this product is found to be defective, USI's only
obligation, and your exclusive remedy, is the repair or replacement of the product, at USI's
discretion, provided that the product has not been damaged through misuse, abuse, accident,
modifications, alteration, neglect or mishandling. This Warranty shall not apply to any product
which is found to have been improperly installed, set-up, or used in any way not in accordance
with the instructions supplied with the product.
ALARM RETURNS:
For replacement of this alarm under the terms of this Warranty, contact our Customer
Service line 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 FITNESS FOR A PARTICULAR PURPOSE,
OTHER THAN THE WARRANTY CONTAINED HEREIN. NO IMPLIED WARRANTY ON
THIS PRODUCT, CREATED BY STATE LAW, SHALL EXTEND BEYOND THE TERM OF
THIS WARRANTY UNLESS SUCH LAW OTHERWISE PROVIDES. USI SPECIFICALLY
DISCLAIMS ANY LIABILITY AND SHALL NOT BE LIABLE FOR ANY CONSEQUENTIAL
OR INCIDENTAL LOSS OR DAMAGE, INCLUDING, BUT NOT LIMITED TO, DAMAGES
TO ANY EQUIPMENT WITH WHICH THIS PRODUCT IS USED.
Some states do not allow the exclusion or limitation of incidental or consequential damages
so the above limitations or exclusions may not apply to you.
No agent, representative, dealer, or employee of the company has the authority to increase
or alter the obligations or terms of this Warranty.
This Warranty gives you specific legal rights and you may also have other rights which vary
from state to state.
This Warranty is only valid for merchandise purchased from outlets in the United States
and Canada.