Kidde P4010ACS User manual

1
INTELLIGENT SMOKE
Smoke Alarm User Guide
Photoelectric Smoke with Voice and Hardwire Interconnect
Model P4010ACS
120V HARDWIRE
10YEAR BATTERY BACKUP
VOICE ALARM
AMBIENT LIGHT SENSOR
SMOKE ALARM
AMBIENT LIGHT SENSOR
Alarm samples the ambient light conditions of its location
and, if possible, determines a Night / Day cycle to delay chirps
during the night until the next Day cycle begins.

2
Thank You for Purchasing this Kidde Alarm
Hardwired for 120VAC, this model features a non-replaceable, sealed-in battery backup. It also contains a voice
message system and SMART Hush® Control to temporarily silence nuisance alarms.
Teach children how to respond to the alarm and that they should never play with the unit. This alarm was designed
specifically for use in a residential environment. It is not designed for use in a recreational vehicle (RV) or boat.
NOTE: Please thoroughly read this user guide and save the document for future reference and to pass on to any
subsequent owner.
The National Fire Protection Association (NFPA) and
the manufacturer recommend replacing this alarm
ten years from the date code on back of alarm.
Date Code (on back): ___________________
Date of Purchase: ___________________
Where Purchased: ___________________
Date to Replace: ___________________
Product Support: 800-880-6788
Please write down the below information
and have this at hand when you call.

3
Contents
1. Smoke Alarm: What To Do When The Alarm Sounds . . . . . . . . . . . . 4
2. Carbon Monoxide Alarm: What To Do When The Alarm Sounds . . . . . . . . 5
3. Other Alarm Visual And Audible Indicators . . . . . . . . . . . . . . . 6
4. Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . 7
5. Introduction, Product Features & Specifications . . . . . . . . . . . . . . 8
6. Limitations of Smoke Alarms . . . . . . . . . . . . . . . . . . . . . 9
7. Recommended Locations For Smoke Alarms . . . . . . . . . . . . . . . 10
8. Locations To Avoid. . . . . . . . . . . . . . . . . . . . . . . . . 10
9. Wiring / Installation / Activation . . . . . . . . . . . . . . . . . . . 12
10. Operation And Testing . . . . . . . . . . . . . . . . . . . . . . . 16
11. Recognizing Nuisance Alarms . . . . . . . . . . . . . . . . . . . . 17
12. Battery Back Up . . . . . . . . . . . . . . . . . . . . . . . . . 18
13. Permanently Disable Alarm / Discharge Battery . . . . . . . . . . . . . 19
14. Cleaning Your Alarm. . . . . . . . . . . . . . . . . . . . . . . . 20
15. Good Safety Habits . . . . . . . . . . . . . . . . . . . . . . . . 21
16. Service And Warranty . . . . . . . . . . . . . . . . . . . . . . . 24

4
1. Smoke Alarm: What To Do When the Alarm Sounds
Smoke alarm pattern is three long beeps with voice “Fire!,” a 1.5 second pause, and three long beeps repeating. The red LED
blinks in time with alarm pattern.
•Alert small children in the home as well as anyone else that might have difficulty recognizing the importance of the
alarm sounding or that might have difficulty leaving the area without help.
•Leave immediately by your escape plan. Every second counts, so don’t waste time getting dressed or picking up
valuables.
•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 the inside of the door is cool, place your shoulder
against it, open it slightly and be ready to slam it shut if heat and smoke rush in.
•If the escape route requires you to go through smoke, stay close to the floor where the air is cleaner. Crawl if neces-
sary, and breathe shallowly through a cloth, wet if possible.
•Once outside, go to your selected meeting place and make sure everyone is there.
•Call the fire department from your cell phone outside, or from your neighbor’s home-not from yours!
•Don’t return to your home until the fire officials say that it is all right to do so.
•There are situations where a smoke alarm may not be effective to protect against fire as stated in the NFPA Standard
72. For instance:
a) smoking in bed
b) leaving children home alone
c) cleaning with flammable liquids, such as gasoline
NOTE: See Section RECOGNIZING NUISANCE ALARMS, for nuisance alarm situations.

5
2. Carbon Monoxide Alarm: What To Do When the Alarm Sounds
NOTE: This is not a carbon monoxide (CO) alarm, but will receive and transmit a CO alarm signal (with voice mes-
sage) from an interconnected CO or combination smoke / CO alarm.
Carbon monoxide (CO) alarm pattern is four quick beeps with voice “Warning! Carbon Monoxide” repeating every 5
seconds. The red LED blinks in time with alarm pattern.
WARNING: CARBON MONOXIDE ALARM ACTIVATION INDICATES THE PRESENCE OF CARBON MON
OXIDE CO AT HIGH CONCENTRATIONS WHICH CAN KILL YOU.
1 Operate the Test/Hush® button. NOTE: Pressing the button on the initiating alarm unit (green LED flashing every sec-
ond) will silence the alarm notification, including all interconnected units. If the unit goes into alarm mode again within
six minutes, it is sensing high levels of CO which can quickly become a dangerous situation.
2 Call your emergency services (Fire Department or 911). EMERGENCY PHONE #: _______________________
3 Immediately move to fresh air — outdoors or by an open door / window. Do a head count to check that all persons are
accounted for. Alert small children in the home as well as anyone else that might have difficulty recognizing the impor-
tance of the alarm sounding or that might have difficulty leaving the area without help. Do not reenter the premises nor
move away from the open door/window until the emergency services responders have arrived, the premises have been
aired out, and your alarm remains in its normal condition.
4 After following steps 1-3, if the alarm reactivates within a 24 hour period, repeat steps 1-3 and call a qualified appli-
ance technician to investigate sources of CO from fuel burning equipment and appliances, and to inspect for proper
operation of equipment.
If problems are identified during this inspection, have the equipment serviced immediately. Note any combustion equipment
not inspected by the technician and consult the manufacturer’s instructions, or contact the manufacturer directly for more
information about CO safety and the equipment. Make sure that motor vehicles are not, or have not been, operating in a garage
attached or adjacent to the residence. Never restart the source of a CO problem until it has been corrected. Never ignore the
sound of the alarm! NOTE: See Section RECOGNIZING NUISANCE ALARMS, for nuisance alarm situations.

6
3. Other Alarm Visual and Audible Indicators
Operational Mode Visual Indications Audible Indications Action/Note:
Normal (standby) AC power: Green LED on continuously
during light conditions, or blink every 60 sec
during dark conditions.
DC power: Green LED blink approx every 60 sec.
Test (button press when
no alarm condition is
present)
•4 patterns of Red/Amber/Green.
•Test: Red LED blinks in time with
alarm pattern.
•Green LED fade on/o at test
complete
• Button press sound
•Voice: "Testing, this is very loud.
Press now to cancel test. 5, 4, 3, 2, 1."
•3 long beeps, Voice "Fire!", 3 long
beeps, Voice "Test Complete," Power
on/reset sound.
•Voice "Test Canceled" if button
pushed before test sequence begins.
Perform Test/Hush® button
press once a week to verify
proper alarm operation
* Push/release button before
the countdown ends to
cancel test.
Smoke Alarm Memory
(unit has experienced
a smoke alarm event
within the last hour)
Red and Amber LED alternate on 1
sec, every 10 sec.
After button push: "Smoke previously
detected" only on the initiating
alarm unit.
Push test button to clear
Alarm Memory. NOTE: stan-
dard test sequence will follow.
(Push/release button again to
cancel test).
Smoke Alarm Hush®
Mode, (SMART Hush®
CONTROL)
Red LED blinks every 2 sec. After button push: "Hush® Mode Acti-
vated." Smoke alarm pattern stops.
(If there is too much smoke to allow
Hush®: Voice "Too Much Smoke, Alarm
cannot be Hushed" Smoke alarm
pattern continues.)
This feature is to be used
only when a known alarm
condition, such as smoke from
cooking, activates the alarm.
Smoke Alarm Hush®
Mode Canceled
None Voice message "Hush® Mode
Canceled."
When smoke levels drop
below the alarm threshold,
the voice message "Hush®
Mode Canceled" will occur .
Initiating Alarm,
(Multiple alarms in an
interconnected system)
Green LED blinks once per sec indicating
that this is the unit initiating the alarm in an
interconnected, multiple alarm, system.
Unit in smoke alarm mode. During alarm, the initiating
alarm red blink will be inter-
rupted by a green blink.

7
4. Troubleshooting Guide
Trouble Condition Visual Indications Audible Indications Action:
Low Battery
Amber
LED
blinks
every
5
seconds
Chirp every 60 sec, voice every
30 sec: “Replace alarm.”
Voice stops after 5 mins.
*Remove, discharge, dispose unit, and replace as
soon as possible.
Fault Mode Chirp every 30 sec.
Voice every 30 sec: “Error, see
trouble shooting guide”
After 5 mins: no voice message
*See Cleaning Your Alarm section.
* Push Test/Hush® button once to attempt to reset
the unit .
*Red LED will blink out an error code (number of
blinks) when Test/Hush® button is push/released
once. Report the number of blinks to customer
service if needed.
End of Unit Life Double chirp every 30 sec.
First 5 mins: Voice every 30 sec:
“Replace alarm, press button to
temporarily silence.” Voice stops
after 5 mins. After 7 days: Chirps
continue. Voice every 30 sec for
5 mins: “Replace alarm.”
* Push/release Test/Hush® button to temporarily
silence (see End of Unit Life Hush® Mode section
below)
* Remove, discharge, dispose unit, and replace as
soon as possible.
End of Unit Life Hush®
Mode (after push/
release Test/Hush®
button during End
of Life)
Voice “Temporarily Silenced.”
End of Unit Life chirps silenced
for 24 hrs. (7 days after End of
Unit Life chirps begin, the chirps
cannot be silenced.)
* Remove, discharge, dispose unit, and replace as
soon as possible.
If you require further information please contact Product Support at 1-800-880-6788 or write us at:
Kidde, 1016 Corporate Park Drive, Mebane, NC 27302. Our internet address is www.kidde.com.

8
5. Introduction, Product Features and Specifications
Introduction
This alarm detects products of combustion using photoelectric technology .
Ten (10) years after the unit was installed, this unit will automatically alert you that it is time to replace the unit. This is
called “End of Unit Life” mode. See Troubleshooting Guide. To help identify the date to replace the unit, a label has been
affixed to the side of the alarm. Write the “Install date” in the space provided, and then write in the “Replace by” date
(10 years from initial power up) in permanent marker on the label prior to installing the unit. NOTE: AC power must be
connected to obtain the full 10 year battery and unit life.
Product Features and Specifications:
•Temperature: Operating Range: 40°F (4.4°C) to 100°F (37.8°C)
•Humidity: Operating range: up to 95% RH non-condensing
•Audible Alarm: 85+ dB at 10’ 3.0 to 3.5 KHz pulsing alarm, with voice message “Fire!”
NOTE: This is not a CO alarm, but it will receive and transmit a CO alarm signal (with voice message
“Warning! Carbon Monoxide”) from an interconnected CO or combination smoke/CO alarm.
•Smoke Sensor: Photoelectric
•Voice message system
•Smoke Alarm SMART Hush® Control
•Ambient Light Sensing
•Powered by 120VAC (60 Hz, 53 mA max) wire-in connector with sealed lithium battery backup.
•Hardwire interconnectable to other compatible alarms.
•One large, user- friendly button.

9
6. Limitations of Smoke Alarms
WARNING: PLEASE READ CAREFULLY AND THOROUGHLY
Product Features and Specifications:
•Life safety from fire in residential occupancies is based primarily on early notification to occupants of the need to
escape, followed by the appropriate egress actions by those occupants.
•Fire warning systems for dwelling units are capable of protecting about half of the occupants in potentially fatal
fires. Victims are often intimate with the fire, too old or young, or physically or mentally impaired such that they
cannot escape even when warned early enough that escape should be possible. For these people, other strategies
such as protection-in-place or assisted escape or rescue are necessary.
•Leading authorities recommend that both ionization and photoelectric smoke alarms be installed to help insure
maximum detection of the various types of fires that can occur within the home. Ionization sensing alarms may
detect invisible fire particles (associated with fast flaming fires) sooner than photoelectric alarms. Photoelectric
sensing alarms may detect visible fire particles (associated with slow smoldering fires) sooner than ionization alarms.
•A battery powered alarm must have a battery of the specified type, in good condition and installed properly (This
model has a sealed backup battery).
•Smoke alarms must be tested regularly to make sure the battery and the alarm circuits are in good operating condition.
•Smoke alarms cannot provide an alarm if smoke does not reach the alarm. Therefore, smoke alarms may not sense
fires starting in chimneys, walls, on roofs, on the other side of a closed door or on a different floor.
•If the alarm is located outside the bedroom or on a different floor, it may not wake up a sound sleeper.
•The use of alcohol or drugs may also impair one’s ability to hear the smoke alarm. For maximum protection, a smoke
alarm should be installed in each sleeping area on every level of a home.
This alarm is not intended to alert hearing impaired individuals.

10
7. Recommended Locations for Smoke Alarms
•Locate smoke alarms in all sleeping areas. Try to monitor the exit path as the bedrooms are usually farthest from the
exit. If more than one sleeping area exists, locate additional alarms in each sleeping area.
•Locate additional alarms to monitor any stairway as stairways act like chimneys for smoke and heat.
•Locate at least one alarm on every floor level.
•Locate an alarm in every bedroom.
•Locate an alarm in every room where electrical appliances are operated (i.e. portable heaters or humidifiers).
•Locate an alarm in every room where someone sleeps with the door closed. The closed door may prevent an alarm
not located in that room from waking the sleeper.
•Smoke, heat, and 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.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
NFPA 72 states: “Smoke alarms in rooms with ceiling
slopes greater than 1 ft in 8 ft (.3m in 2.4 m) horizontally
shall be located on the high side of the room.” NFPA 72
states: “A row of detectors shall be spaced and located
within 3 ft (0.9m) of the peak of the ceiling measured
horizontally.”
Figure 7-A
Figure 7-B Figure 7-C

11
•For mobile home installation, select locations carefully to avoid thermal barriers that may form at the ceiling. For
more details, see MOBILE HOME INSTALLATION section.
•When mounting an alarm on the ceiling, locate it at a minimum of 4” (10 cm) from the side wall.
•When mounting the alarm on the wall, use an inside wall with the top edge of the alarm at a minimum of 4” (10 cm)
and a maximum of 12” (30.5 cm) below the ceiling.
•Put smoke alarms at both ends of a bedroom hallway or large room if the hallway or room is more than 30 feet
(9.1 m) long.
•Install Smoke Alarms on sloped, peaked or cathedral ceilings at or within 3ft (0.9m) of the highest point (measured
horizontally).
This equipment should be installed in accordance with the National Fire Protection Association’s 72 (National Fire Protec-
tion Association, Batterymarch Park, Quincy, MA 02269).
Mobile Home Installation
Modern mobile homes have been designed and built to be energy efficient. Install smoke alarms as recommended
above. In older mobile homes that are not well insulated compared to present standards, extreme heat or cold can be
transferred from the outside to the inside through poorly insulated walls and roof. This may create a thermal barrier
which can prevent the smoke from reaching an alarm mounted on the ceiling. In such units, install the smoke alarm on
an inside wall with the top edge of the alarm a minimum of 4” (10 cm) and a maximum of 12” (30.5 cm) below the ceiling.
If you are not sure about the insulation in your mobile home, or if you notice that the outer walls and ceiling are either
hot or cold compared to the room air temperature, install the alarm on an inside wall. NFPA 72 (National Fire Protection
Association) requires smoke alarms be installed in each sleeping area.
WARNING: TEST YOUR ALARM OPERATION AFTER MOBILE HOME HAS BEEN IN STORAGE OR UNOC
CUPIED, AND AT LEAST ONCE A WEEK DURING USE.

12
8. Locations to Avoid
•In the garage. Products of combustion are present when you start your automobile.
•Normal cooking may cause nuisance alarms. If a kitchen alarm is desired, it should have an alarm silence feature or
be a photoelectric type.
•Do not install within 6 ft. of heating or cooking appliances.
•Less than 4” (10cm) from the peak of an “A” frame type ceiling.
•In an area where the temperature may fall below 40ºF or rise above 100ºF, such as garages and unfinished attics.
•In dusty areas. Dust particles may cause nuisance alarm or failure to alarm.
•In very humid areas (above 95% RH, non-condensing). Moisture or steam can cause nuisance alarms.
•In insect-infested areas.
•Smoke alarms should not be installed within 3 ft (.9m) of the door to a bathroom containing a tub or shower, forced
air supply ducts used for heating or cooling, ceiling or whole house ventilating fans, or other high air flow areas.
•Near lights. Electronic “noise” generated by the electronics may cause nuisance alarms.
•Do not install near vents, flues, chimneys.
•Do not install near fans, doors, windows or areas directly exposed to the weather.
9. Wiring / Installation / Activation
Wiring Requirements
•This alarm should be installed on a UL Listed or recognized junction box. All connections should be made by a
qualified electrician and all wiring used shall be in accordance with articles 210 and 300.3(B) of the U.S. National
Electrical Code ANSI/NFPA 70, NFPA 72 and/or any other codes having jurisdiction in your area. The multiple station
interconnect wiring to the alarms must be run in the same raceway or cable as the AC power wiring. In addition, the
resistance of the interconnect wiring shall be a maximum of 10 ohms.
•The maximum wire run distance between the first and last unit in an interconnected system is 1000 feet.

13
•The appropriate power source is 120 Volt AC Single Phase supplied from a non-switchable circuit, which is not
protected by a ground fault interrupter.
•Smoke alarms are not to be used with detector guards unless the combination (alarm and detector guard) have
been evaluated and found suitable for that purpose.
WARNING: THE ALARM CANNOT BE OPERATED FROM POWER DERIVED FROM A SQUARE WAVE,
MODIFIED SQUARE WAVE OR MODIFIED SINE WAVE, INVERTER. THESE TYPES OF INVERTERS ARE
SOMETIMES USED TO SUPPLY POWER TO THE STRUCTURE IN OFF GRID INSTALLATIONS, SUCH AS
SOLAR OR WIND DERIVED POWER SOURCES. THESE POWER SOURCES PRODUCE HIGH PEAK VOLTAGES
THAT WILL DAMAGE THE ALARM.
Wiring Instructions for AC Quick Connect Harness
CAUTION: Turn off the main power to the circuit before wiring the alarm.
•For alarms that are used as single station, DO NOT CONNECT THE RED WIRE TO ANYTHING. Leave the red wire insu-
lating cap in place to make certain that the red wire cannot contact any metal parts or the electrical box.
•When alarms are hardwire interconnected, all interconnected units must be powered from a single circuit.
•A maximum of 24 Kidde Safety devices may be interconnected in a multiple station arrangement. The intercon-
nect system should not exceed the NFPA interconnect limit of 12 smoke alarms and/or 18 alarms total (smoke, CO,
Smoke/ CO Combination, heat, etc.). With 18 alarms interconnected, it is still possible to interconnect up to a total of
6 remote signaling devices and /or relay modules (see below for details on interconnecting Kidde devices).
•Figure 9-A illustrates interconnection wiring. Improper connection will result in damage to the alarm, failure to
operate, or a shock hazard.
•Make certain alarms are wired to a continuous (non-switched) power line.
NOTE: Use standard UL Listed household wire (as required by local codes) available at all electrical supply
stores and most hardware stores.
NOTE: AC power should be turned off at this stage.

14
•After selecting the proper location for your alarm, and wiring the AC QUICK CONNECT harness as described in
the WIRING INSTRUCTIONS, attach the mounting bracket to the electrical box. To ensure aesthetic alignment of
the alarm with the hallway, or wall, the “A” line on the mounting bracket must be parallel with the hallway when
ceiling mounted, or horizontal when wall mounted.
•Pull the AC QUICK CONNECTOR through the center hole in the mounting bracket and secure the bracket, making
sure that the mounting screws are positioned in the small ends of the keyholes before tightening the screws.
•Plug the AC QUICK CONNECTOR into the wiring harness attached to the unit, making sure that the locks on the
connector snap into place. Then push the excess wire back into the electrical box through the hole in the center
of the mounting bracket.
•Install the alarm fully on the mounting bracket by rotating the alarm in a clockwise direction. NOTE: The alarm
will mount to the bracket in 4 positions (every 90 degrees). NOTE: Installing the alarm on the mounting
bracket will automatically activate the battery backup.
•Turn on the AC power. The green AC Power On Indicator should be lit when the alarm is operating from AC power.
Additional
Alarm
REDBLACK
WHITE
Additional
Alarm
RED
BLACK
WHITE
FUSE OR CIRCUIT BREAKER
REDBLACK
WHITE
Kidde Relay Module
SM120X, CO120X
or both
Optional
Accessory
First
Alarm
Figure 9-A, Interconnect Wiring Diagram
Wires on alarm harness: Connected to:
Black: Hot side of AC line
White: Neutral side of AC line
Red: Interconnect lines (red wires) of other
units in the multiple station set-up

15
NOTE: Attaching AC power first, without rotating the alarm onto
the mounting bracket, will result in a low battery trouble condition
chirp (see Troubleshooting Guide). You need to activate the battery
to eliminate the low battery trouble condition chirps. Attach unit to
mounting bracket very soon after applying AC power to avoid false
low battery notification.
NOTE: The battery activation is a one-time feature. After activation,
the battery cannot be turned off, and can only be discharged at the
end of unit life. If the alarm is removed from the mounting plate,
the backup battery will remain active. See Permanently Disable Alarm /
Discharge Battery section.
AC Wired Interconnect Model Capability
This model has AC hardwire interconnect capability. When one hardwired interconnect unit sounds an alarm, all other
compatible hardwired interconnected units will also alarm.
•The following models can be interconnected using the standard AC wiring interconnect: 1235, 1275, 1276, 1285,
i12020, i12020A, i12040, i12040A, i12060, i12060A, i12080, i12080A, i4618, i4618A, i4618AC, KN-SMFM-I,
RF-SM-ACDC, PE120, P12040, Pi2000, Pi2010, KN-COSM-I, KN-COSM-IB, KN-COSM-IBA, KN-COPE-I,
KN-COPE-IC, KN-COB-IC, KN-COP-IC, SL177i, SLED177i, HD135F, SM120X, CO120X, i12010S, i12010SCO,
P4010ACSCO, P4010ACSCO-W, P4010LACS-W, P4010ACS, P4010ACS-W.
The alarm is now activated! After installation/ activation, test your alarm as described in Operation and Testing section.
WARNING: FAILURE TO PROPERLY INSTALL AND ACTIVATE THIS ALARM WILL PREVENT PROPER
OPERATION OF THIS ALARM AND WILL PREVENT ITS RESPONSE TO FIRE HAZARDS.
Existing Kidde
AC Connector
(either connector
can be used for
this model)
AC connector
shipped with
product
AC connector
Figure 9-B

16
10. Operation and Testing
Operation
The alarm is operating once it is activated and testing is complete (see “TESTING” below). When products of combustion
(smoke) are sensed, the unit sounds a loud alarm with voice messages. See Sections 1 and 2 for alarm signal descriptions.
Testing
Test your alarm weekly by pressing and releasing the test button quickly. A quick beep will confirm the button has been
pushed followed by voice prompts that will inform you of the upcoming test sequence. See Other Alarm Visual and
Audible Indicators table. The alarm and voice (and any interconnected units) will sound if the electronic circuitry, horn,
speaker, and battery are working. If the alarm or voice does not sound, or gives erratic or low volume sound, the unit
must be replaced. See Permanently Disable Alarm / Discharge Battery section to determine how to prepare the unit for
shipment or disposal.
WARNING: DUE TO THE LOUDNESS OF THE ALARM, ALWAYS STAND ABOUT 2.5 FEET AWAY FROM
THE UNIT OR USE EAR PROTECTION WHEN TESTING.
WARNING: DO NOT USE AN OPEN FLAME TO TEST YOUR ALARM, YOU COULD DAMAGE THE ALARM
OR IGNITE COMBUSTIBLE MATERIALS AND START A STRUCTURE FIRE.
Ambient Light Sensing
In low light ambient conditions, the green LED ring fades to off, and then blinks approx every 60 seconds. This unit sam-
ples the ambient light conditions of the alarm’s location and, if possible, determines a Night / Day cycle. A valid Night /
Day cycle will delay unit chirps during the night until the next Day cycle begins.

17
When chirping begins during the next Day cycle, you can temporarily
silence End of Unit Life chirps by pressing the Test/Hush® button. Low
Battery chirps cannot be silenced. If a valid Night / Day cycle has not
been established because the unit is located in either a constantly
dark or lighted location, the chirps mentioned above will not be delayed at night. Moving the unit to a different location
might allow the unit to determine a valid Night / Day cycle.
WARNING: REPLACE UNIT AS SOON AS POSSIBLE WHEN IN END OF UNIT LIFE OR LOW BATTERY MODE.
11. Recognizing Nuisance Alarms
Smoke Nuisance
HUSH®: If you know why the alarm is sounding, and you can verify that it is not a life threatening situation, you can
push the button on the initiating unit (green LED flashing every second) to silence the alarm for 8-10 minutes. If the
smoke is not too dense, that unit, and all interconnected units will silence. After the Hush® period, the smoke alarm will
automatically reset and sound the alarm if particles of combustion are still present. You can use Hush® repeatedly until
the air has been cleared of the condition causing the alarm.
NOTE: Dense smoke will override Hush® and sound a continuous alarm. If no fire is present, check to see if
one of the reasons listed in “Locations to avoid” may have caused the alarm. If a fire is discovered, get out and
call the fire department.
This alarm is designed to minimize nuisance alarms. Cigarette smoke will not normally cause the unit to alarm, unless
the smoke is blown directly into the alarm. Combustion particles from cooking may set off the alarm if it is located too
close to a cooking appliance. Large quantities of combustible particles are generated from spills or when broiling. Using
the fan on a range hood which vents to the outside (non-recirculating type) will also help prevent nuisance alarms from
occurring by removing these combustible products from the kitchen.
POSSIBLE CHIRPING REASONS
End of Unit Life: will be delayed at night
Low battery: will be delayed at night

18
Carbon Monoxide (CO) Nuisance
WARNING: THIS UNIT DOES NOT DETECT CO, BUT IT WILL TRANSMIT A CO ALARM SIGNAL FROM AN IN
TERCONNECTED CO OR SMOKE/CO COMBINATION ALARM. IT IS IMPOSSIBLE TO DETERMINE THE SOURCE
OF A CO ALARM USING SIGHT OR SMELL. ALWAYS CONSIDER A CO ALARM EVENT AS DANGEROUS.
•Pushing the button on the initiating CO or Smoke/CO combination alarm will silence that alarm and all compatible
interconnected units.
•Pushing the button on any hard-wire smoke alarm will do nothing to silence an interconnected CO alarm.
12. Battery Backup
This alarm is powered with AC power, but also contains a sealed lithium battery backup system. No battery installation or
replacement is necessary for the life of the alarm.
NOTE: AC power must be connected to obtain the full 10 year battery and unit life. Constant exposure to high
or low humidity or temperatures may reduce battery life.
WARNING: NO SERVICEABLE PARTS INCLUDED. DO NOT ATTEMPT TO OPEN THE ALARM FOR ANY
REASON! DO NOT TRY TO REPAIR THE ALARM YOURSELF.
Low Battery
This alarm is equipped with a low battery monitor circuit. If the battery capacity can no longer provide adequate power
for all alarm functions, the low battery condition will occur. See Troubleshooting Guide. The unit must be replaced with-
in 7 days of the first occurrence of the “Low Battery Warning” to provide continuous alarm protection.

19
13. Permanently Disable Alarm / Discharge Battery
WARNING: FAILURE TO DISCHARGE ALARM BATTERY AS INSTRUCTED PRIOR TO
DISPOSAL MAY CREATE POTENTIAL FOR LITHIUM BATTERY RELATED FIRE OR HAZARD.
WARNING: DISCHARGING THE ALARM BATTERY IS PERMANENT
•Once the alarm battery has been discharged, it cannot be reactivated!
•Once discharged, the alarm will NO LONGER DETECT SMOKE.
•Once the alarm battery is discharged, the battery is depleted and the alarm will no longer function.
•Once the alarm battery has been discharged, the alarm cannot be mounted onto the mounting plate or reactivated.
To Permanently Disable Alarm / Discharge Battery:
•Rotate the alarm counterclockwise to remove it from the mounting
plate.
•Disconnect AC wiring harness.
•Push in the dashed area with a screwdriver to break tab (Figure 13-A).
•After the tab is broken, use the screwdriver to turn the red slotted
arrow to the "Permanently Disable Alarm / Discharge Battery" loca-
tion. This will disable the alarm, stop the low battery or end of unit
life “chirps” and render the alarm safe for disposal by draining the
battery (Figure 13-B).
Figures 13-A (top) and 13-B (bottom)

20
14. Cleaning Your Alarm
Your Alarm Should be Cleaned at Least Once a Year
You can clean the interior of your alarm (sensing chamber) by using compressed air or a vacuum cleaner hose and blow-
ing or vacuuming through the openings around the perimeter of the alarm. The outside of the alarm can be wiped with
a damp cloth. Use only water to dampen the cloth, use of detergents or cleaners could damage the alarm.
If the alarm is in Fault mode and the Red LED is blinking a fault code of 10 or 14 flashes (after a Test/Hush® button push),
the alarm may be in need of cleaning. After cleaning, press the Test/Hush® button. If the fault does not clear, the alarm
needs to be replaced.
•Never use detergent or other solvents to clean the unit.
•Avoid spraying air freshener, hair spray, or other aerosols near the alarm.
•Do not paint the unit. Paint will seal the vents and interfere with the sensor’s ability to detect smoke.
•Never attempt to disassemble the unit or clean inside. This action will void your warranty.
WARNING: REINSTALL THE ALARM AS SOON AS POSSIBLE TO ENSURE CONTINUOUS PROTECTION.