BRK electronic SA720 Leaflet

This user’s manual contains important information about your Smoke
Alarm’s operation. If you are installing this Smoke Alarm for use by 
others, you must leave this manual—or a copy of it—with the end user.

Printed in Mexico
M08-0136-001   K1

08/07

Model SA720

Thank you for choosing First Alert

®

for your Smoke Alarm needs. You

have purchased a state of the art Smoke Alarm designed to provide you
with early warning of a fire. Please take the time to read this manual and
make the Smoke Alarm an integral part of your family’s safety plan.

Key Features of the SA720 Smoke Alarm:

Photoelectric Sensing Technology: Photoelectric Sensors are generally
more sensitive than ionization sensors in detecting smoldering fires
which commonly occur in couches or bedding.

OptiPath 360 Technology™: Patented technology provides 360° of
direct access to the smoke sensor.

Single Test/Silence Button: Allows you to test the alarm or silence 
nuisance alarms. Testing the Alarm assures you that the unit is functioning
correctly and ready to protect you and your family. The Alarm can be
silenced for up to 15 minutes in the event of a nuisance alarm.

: Bright escape light activates when this unit goes into

alarm to illuminate your path to safety.

Battery Drawer with “battery missing” lockout: Allows you to easily
replace the battery with out removing the alarm from the ceiling. 
The battery door will not close if a battery has not been inserted thus
alerting you that the unit is not powered and not operating.

Low battery warning: The Alarm will sound a “chirp” once per minute
when the battery needs to be replaced.

Blinking Power Indicator: Confirms that the Smoke Alarm is receiving
power.

© 2007 BRK Brands, Inc., a Jarden Corporation company (NYSE: JAH)
3901 Liberty Street Road, Aurora, IL 60504-8122      All rights reserved.
Consumer Affairs: (800) 323-9005  •  www.firstalert.com

Follow safety rules and prevent hazardous situations: 1) Use smoking
materials properly. Never smoke in bed. 2) Keep matches or lighters 
away from children; 3) Store flammable materials in proper containers; 
4) Keep electrical appliances in good condition and don’t overload elec-
trical circuits; 5) Keep stoves, barbecue grills, fireplaces and chimneys
grease- and debris-free; 6) Never leave anything cooking on the stove
unattended; 7) Keep portable heaters and open flames, like candles,
away from flammable materials; 8) Don’t let rubbish accumulate.

Keep alarms clean, and test them weekly. Replace alarms immediately 
if they are not working properly. Smoke Alarms that do not work cannot
alert you to a fire. Keep at least one working fire extinguisher on every
floor, and an additional one in the kitchen. Have fire escape ladders or
other reliable means of escape from an upper floor in case stairs are
blocked.

Important! Read “Recommended Locations for Smoke Alarms” and
“Locations to Avoid for Smoke Alarms” before beginning. This unit 
monitors the air, and when smoke reaches its sensing chamber, 
it alarms. It can give you more time to escape before fire spreads. 
This unit can ONLY give an early warning of developing fires if it is
installed, maintained and located where smoke can reach it, and where
all residents can hear it, as described in this manual. This unit will not
sense gas, heat, or flame. It cannot prevent or extinguish fires.

Battery powered or electrical? Different Smoke Alarms provide 
different types of protection. See “About Smoke Alarms” for details.

Fire Safety Professionals recommend at least one Smoke Alarm on
every level of your home, in every bedroom, and in every bedroom
hallway or separate sleeping area. See “Recommended Locations
For Smoke Alarms” and “Locations To Avoid For Smoke Alarms” for
details.

A Smoke Alarm can help alert you to fire, giving you precious time to
escape. It can only sound an alarm once smoke reaches the sensor.
See “Limitations of Smoke Alarms” for details.

This Smoke Alarm is designed to be used in a typical single-family
home. It alone will not meet requirements for boarding houses,
apartment buildings, hotels or motels. See “Special Compliance
Considerations” for details.

Ionization technology is generally more sensitive than photoelectric
technology at detecting small particles, which tend to be produced
in greater amounts by flaming fires, which consume combustible

materials rapidly and spread quickly. Sources of these fires may include
paper burning in a wastebasket, or a grease fire in the kitchen.

Photoelectric technology is generally more sensitive than ionization
technology at detecting large particles, which tend to be produced
in greater amounts by smoldering fires, which may smolder for

hours before bursting into flame. Sources of these fires may include 
cigarettes burning in couches or bedding.
For maximum protection, use both types of Smoke Alarms on each
level and in every bedroom of your home.

1. Mounting bracket

2. Mounting slots

3. Battery drawer, install 9V 

battery here

4. Turn this way to remove 

from bracket

5. Turn this way to attach 

to bracket

1. Test/Silence button

2. Battery drawer

3. Power indicator light and

alarm indicator

4. Escape Light

®

1. Hold base firmly and twist the mounting bracket counterclockwise

to separate it from the base.

2. Hold the mounting bracket against the ceiling (or wall) so the 

vertical mounting slot is aligned in the 12 o’clock position and
trace around the inside of the mounting slots (vertical and 
horizontal mounting).

3. Put the unit where it won’t get covered with dust when you drill

the mounting holes.

4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the

oval outlines you traced.

5. Insert the plastic screw anchors (in the plastic bag with screws)

into the holes. Tap the screw anchors gently with a hammer, if 
necessary, until they are flush with the ceiling or wall.

6. Attach the mounting bracket to the ceiling or wall.

7. Install the battery (included). Open the

battery drawer. Match the terminals on the
end of the battery with the terminals on the
unit. Match “+” to “+” and “-” to “-.” Push 
the battery in until it snaps in securely and
cannot be shaken loose. If the battery is 
not snapped in completely, the unit cannot
receive battery power.

8. Attach the Smoke Alarm to the mounting bracket. Line up the

guides on the alarm’s base with the guides on the mounting 
bracket. When guides are lined up, turn the base clockwise (right)
until it snaps into place.

9. Test the Smoke Alarm. See “Weekly Testing.”

Smoke Alarms may not operate properly because of dead, missing or
weak batteries, a build-up of dirt, dust or grease on the Smoke Alarm
cover, or installation in an improper location. Clean the Smoke Alarm as
described in “Regular Maintenance,” and install a fresh battery, then test
the Smoke Alarm again. If it fails to test properly when you use the test
button, or if the problem persists, replace the Smoke Alarm immediately.

If the Smoke Alarm is still not operating properly, and it is still under 
warranty, please see “How to Obtain Warranty Service” in the Limited
Warranty.

BRK Brands, Inc., ("BRK") the maker of First Alert

®

brand products 

warrants that for a period of ten years from the date of purchase, this
product will be free from defects in material and workmanship. BRK, at
its option, will repair or replace this product or any component of the
product found to be defective during the warranty period. Replacement
will be made with a new or remanufactured product or component. 
If the product is no longer available, replacement may be made with a
similar product of equal or greater value. This is your exclusive warranty.

This warranty is valid for the original retail purchaser from the date of 
initial retail purchase and is not transferable. Keep the original sales
receipt. Proof of purchase is required to obtain warranty performance.
BRK dealers, service centers, or retail stores selling BRK products do 
not have the right to alter, modify or any way change the terms and 
conditions of this warranty.

This warranty does not cover normal wear of parts or damage resulting
from any of the following: negligent use or misuse of the product, use on
improper voltage or current, use contrary to the operating instructions,
disassembly, repair or alteration by anyone other than BRK or an 
authorized service center. Further, the warranty does not cover Acts of
God, such as fire, flood, hurricanes and tornadoes or any batteries that
are included with this unit.

BRK shall not be liable for any incidental or consequential damages
caused by the breach of any express or implied warranty. Except to 
the extent prohibited by applicable law, any implied warranty of 
merchantability or fitness for a particular purpose is limited in duration 
to the duration of the above warranty. Some states, provinces or 
jurisdictions do not allow the exclusion or limitation of incidental or 
consequential damages or limitations on how long an implied warranty
lasts, so the above limitations or exclusion may not apply to you. This
warranty gives you specific legal rights, and you may also have other
rights that vary from state to state or province to province.

If service is required, do not return the product to your retailer.

In order to obtain warranty service, contact the Consumer Affairs
Division at 1-800-323-9005, 7:30 AM - 5:00 PM Central Standard Time,
Monday through Friday. To assist us in serving you, please have the
model number and date of purchase available when calling. 
For Warranty Service return to: 25 Spur Drive, El Paso, TX 79906

Battery: BRK Brands, Inc. make no warranty, express or implied, written
or oral, including that of merchantability or fitness for any particular 
purpose with respect to battery.

Installing Smoke Alarms in Single-Family Residences
The National Fire Protection Association (NFPA), recommends one
Smoke Alarm on every floor, in every sleeping area, and in every bed-
room. In new construction, the Smoke Alarms must be AC powered and
interconnected. See “Agency Placement Recommendations” for details.
For additional coverage, it is recommended that you install a Smoke
Alarm in all rooms, halls, storage areas, finished attics, and basements,
where temperatures normally remain between 40˚ F (4˚ C) and 100˚ F 
(38˚ C). Make sure no door or other obstruction could keep smoke from
reaching the Smoke Alarms.

More specifically, install Smoke Alarms:
•

On every level of your home, including finished attics and basements.

•

Inside every bedroom, especially if people sleep with doors closed.

•

In the hall near every sleeping area. If your home has multiple
sleeping areas, install a unit in each. If a hall is over 40 feet (12
meters) long, install an alarm at each end.

•

At the top of the first-to-second floor stairway, and at bottom of
basement stairway.

Specific requirements for Smoke Alarm installation vary from state to
state and from region to region. Check with your local Fire Department
for current requirements in your area. It is recommended AC or AC/DC
units be interconnected for added protection.

For minimum security install one Smoke Alarm as close to each sleeping
area as possible. For more security, put one unit in each room. Many
older mobile homes (especially those built before 1978) have little or no
insulation. If your mobile home is not well insulated, or if you are unsure
of the amount of insulation, it is important to install units on inside walls
only. Smoke Alarms should be installed where temperatures normally
remain between 40˚ F (4˚ C) and 100˚ F (38˚ C).  WARNING: Test units
used in RVs after the vehicle has been in storage, before every trip,
and once a week while in use. Failure to test units used in RVs as
described may remove your protection.

This equipment should be installed in accordance with NFPA (National
Fire Protection Association) 72 and 101. National Fire Protection
Association, One Batterymarch Park, Quincy, MA 02269-9101.
Additional local building and regulatory codes may apply in your
area. Always check compliance requirements before beginning 
any installation. This model is not RV listed with Underwriters
Laboratories Inc.

Smoke Alarms shall be installed in each separate sleeping room, outside
each sleeping area in the immediate vicinity of the bedrooms and on
each additional story of the family living unit, including basements and
excluding crawl spaces and unfinished attics.

In new construction, Alarms shall be so arranged that operation of any
one Alarm shall cause the operation of all Alarms within the dwelling.

Smoke Detection-Are More Smoke Alarms Desirable? The required
number of Smoke Alarms might not provide reliable early warning 
protection for those areas separated by a door from the areas protected
by the required Smoke Alarms. For this reason, it is recommended that
the householder consider the use of additional Smoke Alarms for those
areas for increased protection. The additional areas include the base-
ment, bedrooms, dining room, furnace room, utility room, and hallways
not protected by the required Smoke Alarms. The installation of Smoke
Alarms in kitchens, attics (finished or unfinished), or garages is not 
normally recommended, as these locations occasionally experience 
conditions that can result in improper operation.

Early warning 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,
but outside bedrooms), and Heat or Smoke Alarms in the living rooms,
dining rooms, bedrooms, kitchens, hallways, finished attics, furnace
rooms, closets, utility and storage rooms, basements, and attached
garages.

•

Where combustion particles are produced. Combustion particles
form when something burns. Areas to avoid include poorly ventilated
kitchens, garages, and furnace rooms. Keep units at least 20 feet 
(6 meters) from the sources of combustion particles (stove, furnace,
water heater, space heater) if possible. In areas where a 20-foot 
(6-meter) distance is not possible – in modular, mobile, or smaller
homes, for example – it is recommended the Smoke Alarm be
placed as far from these fuel-burning sources as possible. The 
placement recommendations are intended to keep these Alarms at 
a reasonable distance from a fuel-burning source, and thus reduce
“unwanted” alarms. Unwanted alarms can occur if a Smoke Alarm
is placed directly next to a fuel-burning source. Ventilate these
areas as much as possible.

•

In air streams near kitchens. Air currents can draw cooking smoke
into the sensing chamber of a Smoke Alarm near the kitchen.

•

In very damp, humid or steamy areas, or directly near bathrooms
with showers. Keep units at least 10 feet (3 meters) away from
showers, saunas, dishwashers, etc.

•

Where the temperatures are regularly below 40˚ F (4˚C) or above 
100˚ F (38˚C), including unheated buildings, outdoor rooms, porches,
or unfinished attics or basements.

•

In very dusty, dirty, or greasy areas. Do not install a Smoke Alarm
directly over the stove or range. Keep laundry room Smoke Alarms
free of dust or lint.

•

Near fresh air vents, ceiling fans, or in very drafty areas. Drafts can
blow smoke away from the unit, preventing it from reaching the 
sensing chamber.

•

In insect infested areas. Insects can clog openings to the sensing
chamber and cause unwanted alarms.

•

Less than 12 inches (305mm) away from fluorescent lights. 
Electrical “noise” can interfere with the sensor.

•

In “dead air” spaces. “Dead air” spaces may prevent smoke from
reaching the Smoke Alarm.

“Dead air” spaces may prevent smoke from reaching the Smoke Alarm.
To avoid dead air spaces, follow the installation recommendations
below.

On ceilings, install Smoke Alarms as close to the center of the ceiling
as possible. If this is not possible, install the Smoke Alarm at least 4
inches (102 mm) from the wall or corner.

For wall mounting (if allowed by building codes), the top edge of
Smoke Alarms should be placed between 4 and 12 inches (102 and
305 mm) from the wall/ceiling line, below typical “dead air” spaces.

On a peaked, gabled, or cathedral ceiling, install the first Smoke
Alarm within 3 feet (0.9 meters) of the peak of the ceiling, measured
horizontally. Additional Smoke Alarms may be required depending on
the length, angle, etc. of the ceiling's slope. Refer to NFPA 72 for
details on requirements for sloped or peaked ceilings.

This Smoke Alarm alone is not a suitable substitute for complete fire
detection systems in places housing many people—like apartment 
buildings, condominiums, hotels, motels, dormitories, hospitals, long-
term health care facilities, nursing homes, day care facilities, or group
homes of any kind—even if they were once single-family homes. It is
not a suitable substitute for complete fire detection systems in ware-
houses, industrial facilities, commercial buildings, and special-purpose
non-residential buildings which require special fire detection and alarm
systems. Depending on the building codes in your area, this Smoke
Alarm may be used to provide additional protection in these facilities.

The following information applies to all four building types below:
In new construction, most building codes require the use of AC or
AC/DC powered Smoke Alarms only. In existing construction, AC,
AC/DC, or DC powered Smoke Alarms can be used as specified by
local building codes. Refer to NFPA 101 (Life Safety Code) or NFPA 72
(National Fire Alarm Code), local building codes, or consult your Fire
Department for detailed fire protection requirements in buildings not
defined as “households.” 

1. Single-Family Residence:
Single family home, townhouse. It is recommended Smoke Alarms be
installed on every level of the home, in every bedroom, and in each 
bedroom hallway.

2. Multi-Family or Mixed Occupant Residence:
Apartment building, condominium. This Smoke Alarm is suitable for use
in individual apartments or condos, provided a primary fire detection
system already exists to meet fire detection requirements in common
areas like lobbies, hallways, or porches. Using this Smoke Alarm in 
common areas may not provide sufficient warning to all residents or
meet local fire protection ordinances/regulations.

3. Institutions:
Hospitals, day care facilities, long-term health care facilities. This 
Smoke Alarm is suitable for use in individual patient sleeping/resident
rooms, provided a primary fire detection system already exists to meet
fire detection requirements in common areas like lobbies, hallways, or 
porches. Using this Smoke Alarm in common areas may not provide 
sufficient warning to all residents or meet local fire protection ordinances
/regulations.

4. Hotels and Motels:
Also boarding houses and dormitories. This Smoke Alarm is suitable 
for use inside individual sleeping/resident rooms, provided a primary 
fire detection system already exists to meet fire detection requirements
in common areas like lobbies, hallways, or porches. Using this Smoke
Alarm in common areas may not provide sufficient warning to all 
residents or meet local fire protection ordinances/regulations.

Smoke Alarms have played a key role in reducing deaths resulting from
home fires worldwide. However, like any warning device, Smoke Alarms
can only work if they are properly located, installed, and maintained,
and if smoke reaches them. They are not foolproof.

Smoke alarms may not waken all individuals. Practice the escape
plan at least twice a year, making sure that everyone is involved – from
kids to grandparents. Allow children to master fire escape planning and
practice before holding a fire drill at night when they are sleeping. 
If children or others do not readily waken to the sound of the smoke
alarm, or if there are infants or family members with mobility limitations,
make sure that someone is assigned to assist them in fire drill and in
the event of an emergency. It is recommended that you hold a fire drill
while family members are sleeping in order to determine their response
to the sound of the smoke alarm while sleeping and to determine
whether they may need assistance in the event of an emergency.

Smoke Alarms cannot work without power. Battery operated units
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 units cannot work if the AC power is cut off for any reason
(open fuse or circuit breaker, failure along a power line or at a power 
station, electrical fire that burns the electrical wires, etc.). If you are 
concerned about the limitations of battery or AC power, install both 
types of units.

Smoke from fires in chimneys or walls, on roofs, or on the other

side of closed doors may not reach the sensing chamber and set off the
alarm. That is why one unit should be installed inside each bedroom or
sleeping area—especially if bedroom or sleeping area doors are closed
at night—and in the hallway between them.

Smoke Alarms may not detect fire on another floor or area of the
home. For example, a stand-alone unit on the second floor may not
detect smoke from a basement fire until the fire spreads. This may not
give you enough time to escape safely. That is why recommended 
minimum protection is at least one unit in every sleeping area, and every
bedroom on every level of your home. Even with a unit on every floor,
stand-alone units may not provide as much protection as interconnected
units, especially if the fire starts in a remote area. Some safety experts
recommend installing interconnected AC powered units with battery
back-up (see “About Smoke Alarms”) or professional fire detection 
systems, so if one unit senses smoke, all units alarm. Interconnected
units may provide earlier warning than stand-alone units since all units
alarm when one detects smoke.

Smoke Alarms may not be heard. Though the alarm horn in this unit
meets or exceeds current standards, it may not be heard if: 1) the unit 
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
stereo, TV, traffic, air conditioner or other appliances, 4) residents are
hearing impaired or sound sleepers. Special purpose units, like those
with visual and audible alarms, should be installed for hearing impaired
residents.

Like any electronic device, Smoke

Alarms are made of components that can wear out or fail at any time. 
You must test the unit weekly to ensure your continued protection.
Smoke Alarms cannot prevent or extinguish fires. They are not a 
substitute for property or life insurance.

Smoke Alarms have a limited life. The unit should be replaced 
immediately if it is not operating properly. You should always replace a
Smoke Alarm after 10 years from date of purchase. Write the purchase
date on the space provided on back of unit.

First Alert

®

is a registered trademark of the First Alert Trust.

Battery (DC) operated Smoke Alarms: Provide protection even when
electricity fails, provided the batteries are fresh and correctly installed.
Units are easy to install, and do not require professional installation.

AC powered Smoke Alarms: Can be interconnected so if one unit 
senses smoke, all units alarm. They do not operate if electricity fails. 
AC with battery (DC) back-up: will operate if electricity fails, provided
the batteries are fresh and correctly installed. AC and AC/DC units
must be installed by a qualified electrician.

Smoke Alarms for Solar or Wind Energy users and battery backup
power systems: AC powered Smoke Alarms should only be operated
with true or pure sine wave inverters. Operating this Smoke Alarm with
most battery-powered UPS (uninterruptible power supply) products or
square wave or “quasi sine wave” inverters will damage the Alarm. 
If you are not sure about your inverter or UPS type, please consult with
the manufacturer to verify.

Smoke Alarms for the hearing impaired: Special purpose Smoke
Alarms should be installed for the hearing impaired. They include a 
visual alarm and an audible alarm horn, and meet the requirements of 
the Americans With Disabilities Act. Can be interconnected so if one
unit senses smoke, all units alarm.

Smoke alarms are not to be used with detector guards unless the 
combination has been evaluated and found suitable for that purpose.

All these Smoke Alarms are designed to provide early warning of fires if
located, installed and cared for as described in the user’s manual, and
if smoke reaches them. If you are unsure which type of Smoke Alarm 
to install, refer to Chapter 2 of the National Fire Protection Association
(NFPA) Standard 72 (National Fire Alarm Code) and NFPA 101 (Life
Safety Code). National Fire Protection Association, One Batterymarch
Park, Quincy, MA 02269-9101. Local building codes may also require
specific units in new construction or in different areas of the home.

Printed in Mexico   M08-0136-001   K1

08/07

•

Don’t panic; stay calm. Follow your family escape plan.

•

Get out of the house as quickly as possible. Don’t stop to get
dressed or collect anything.

•

Feel doors with the back of your hand before opening them. 
If a door is cool, open it slowly. Don’t open a hot door. Keep doors 
and windows closed, unless you must escape through them.

•

Cover your nose and mouth with a cloth (preferably damp). 
Take short, shallow breaths.

•

Meet at your planned meeting place outside your home, 
and do a head count to make sure everybody got out safely.

•

Call the Fire Department as soon as possible from outside. 
Give your address, then your name.

•

Never go back inside a burning building for any reason.

•

Contact your Fire Department for ideas on making your home safer.

The Silence Feature can temporarily quiet an unwanted alarm for up to
15 minutes. To use this feature, press the “Push to Test/Silence” button
on the cover. If the unit will not silence and no heavy smoke is 
present, or if it stays in silence mode continuously, it should be
replaced immediately

. The LED will flash every 10 seconds while in

silence.

• Pencil 

• Drill with 3/16” (5 mm) drill bit

• Standard flathead screwdriver

• Hammer

• Pliers to activate optional “tamper-resistant” 

locking features

Do not lock the battery compartment until you have installed the
battery and tested the unit.
1. Install the battery so the terminals 

on the battery match the terminals 
on the Smoke Alarm. Match “+” to
“+” and “-” to “-.” Push the battery in
until it snaps in securely and cannot
be shaken loose. If the battery is 
not snapped in completely, the unit
cannot receive battery power. 

2. Push and hold Test/Silence button

until the alarm sounds: 3 beeps, 
pause, 3 beeps, pause. 
The Escape Light

will turn on. 

LED flashes once every second.

3. Using needle-nose pliers, detach 

one locking pin from the mounting
bracket.

4. Push the locking pin through the 

hole near the battery door latch on
the back of the Smoke Alarm.

1. Using needle-nose pliers,

detach one locking pin from 
the mounting bracket.

2. Insert the locking pin through

the hole on the back of the 
Smoke Alarm as shown in the
diagram.

3. When you attach the Smoke

Alarm to the mounting bracket,
the locking pin’s head will fit
into a notch on the bracket.

These Smoke Alarms have two separate locking features: one to lock the battery compartment, and the other to lock the Smoke Alarm to the mounting
bracket. You can choose to use either feature independently, or use them both.

Both locking features use locking pins, which are molded into the mounting bracket. Depending on which locking 
features you use, remove one or both pins from the mounting bracket using needle-nose pliers.

1. Remove the Smoke Alarm 

from the mounting bracket.
If the unit is locked to the 
bracket, see the section 
“To Unlock the Mounting
Bracket.”

2. Insert a flathead screwdriver

under the head of the locking 
pin, and gently pry it out of the
battery compartment lock. 
(If you plan to relock the battery
compartment, save the locking
pin.)

3. To relock the battery compart-

ment, close the battery door 
and reinsert locking pin in lock.

4. Reattach the Smoke Alarm 

to the mounting bracket.

1. Insert a flathead screwdriver into

the rectangular cut-out on the
mounting bracket nearest to the
locking pin.

2. Pry the Smoke Alarm away from

the bracket by pushing up on 
the screwdriver and turning the
Smoke Alarm counterclockwise
(left) at the same time.

It is important to test this unit every week to make sure it is working
properly. Using the Test/Silence button is the recommended way to
test this Smoke Alarm. Press and hold the Test/Silence button on the
cover of the unit until the alarm sounds and the Escape Light

turns on

(the unit may continue to alarm for a few seconds after you release the
button). If it does not alarm, make sure the unit is receiving power and
test it again. If it still does not alarm, replace it immediately. 
During testing you will hear a loud, repeating horn pattern: 3 beeps,
pause, 3 beeps, pause. The Escape Light

will turn on. LED flashes

once every second.

This unit 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 Smoke Alarm at least once a month; gently vacuum off
any dust using your household vacuum’s soft brush attachment,
and test the Smoke Alarm after cleaning. Never use water, cleaners
or solvents since they may damage the unit.

•

If the Smoke Alarm becomes contaminated by excessive dirt, dust
and/or grime, and cannot be cleaned to avoid unwanted alarms,
replace the unit immediately.

•

Relocate the unit if it sounds frequent unwanted alarms. 
See “Locations to Avoid For Smoke Alarms” for details.

•

When the battery becomes weak, the Smoke Alarm unit will “chirp”
approximately once a minute (the low battery warning). This low 
battery warning should last for up to 30 days, but you should
replace the battery immediately to continue your protection.

Choosing a replacement battery:
Your Smoke Alarm requires one standard 9V battery. The following 
batteries are acceptable as replacements: Duracell #MN1604, (Ultra)
#MX1604; Eveready (Energizer) #522. You may also use a Lithium 
battery like the Ultralife U9VL-J for longer service life between battery
changes. These batteries are available at many local retail stores.

Actual service life depends on the Smoke Alarm and the environment 
in which it is installed. All the batteries specified above are acceptable
replacement batteries for this unit. Regardless of the manufacturer’s 
suggested battery life, you MUST replace the battery immediately once
the unit starts “chirping” (the “low battery warning”).