Kidde TRUSENSE SMOKE User manual

1
TRUSENSE SMOKE
User Guide
Multi-Criteria Optical Sensor Smoke Alarm
Model 2040-DSR
Model 2040-DSR-5B (oversized mounting bracket)
9V BATTERY
SMOKE ALARM
2040DSR 2040DSR5B
P/N: 2040-7202-01 RevB
RED = ALARM
GREEN = OPERATE
AMBER = FAULT
RED = ALARM
GREEN = OPERATE
AMBER = FAULT
P
U
S
H
T
O
T
E
S
T
W
E
E
K
L
Y
O
R
T
O
H
U
S
H
SMOKE ALARM
Advanced Smoke Detection Technology
SENSE
P
U
S
H
T
O
T
E
S
T
W
E
E
K
L
Y
O
R
T
O
H
U
S
H
SMOKE ALARM
Advanced Smoke Detection Technology
SENSE
Helps Reduce Cooking
Nuisance Alarms
UL 217 8
th
Ed.
1

2
Thank You for Purchasing this Kidde Smoke Alarm
This model is powered by a 9V battery. It also contains 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. Your Kidde Smoke Alarm was designed 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: 1-800-880-6788
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. Other Alarm Visual And Audible Indicators . . . . . . . . . . . . . . . . 5
3. Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . 6
4. Introduction, Product Features And Specifications . . . . . . . . . . . . . 7
5. Limitations Of Smoke Alarms . . . . . . . . . . . . . . . . . . . . . 8
6. Recommended Locations For Smoke Alarms . . . . . . . . . . . . . . . 10
7. Locations To Avoid . . . . . . . . . . . . . . . . . . . . . . . . . 14
8. Installation And Activation . . . . . . . . . . . . . . . . . . . . . . 15
9. Operation And Testing . . . . . . . . . . . . . . . . . . . . . . . 16
10. Recognizing Nuisance Alarms . . . . . . . . . . . . . . . . . . . . 17
11. Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
12. Cleaning Your Alarm . . . . . . . . . . . . . . . . . . . . . . . . 19
13. Good Safety Habits . . . . . . . . . . . . . . . . . . . . . . . . 20
14. Service And Warranty . . . . . . . . . . . . . . . . . . . . . . . 23

4
1. Smoke Alarm: What To Do When The Alarm Sounds
The smoke alarm pattern is three long beeps, a 1.5 second pause, and three long beeps
repeating. The red LED blinks in time with the 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.
•While 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 alter-
nate 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 necessary, 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 or 911 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.
NOTE: See Section RECOGNIZING NUISANCE ALARMS, for nuisance alarm situations.

5
2. Other Alarm Visual And Audible Indicators
Operational Mode Visual Indications Audible Indications Action/Note
Normal (standby) Green LED blinks
approx every
60 sec.
Test (button press
when no alarm
condition is
present)
(Note: Test is very
loud, stand a few
feet away.)
Red LED blinks in time
with alarm pattern.
• Single beep.
•3 long beeps, pause,
3 long beeps.
• Single beep.
Perform button press once
a week to verify proper
alarm operation.
Smoke Alarm
Memory (unit has
experienced a
smoke alarm event)
Red LED blinks every
15 sec.
NOTE: Alarm memory is
only retained for 24 hrs.
Push test button to clear
Alarm Memory.
Smoke Alarm Hush
Mode (SMART
HUSH®
CONTROL)
Red LED blinks every
2 sec.
Smoke alarm pattern
stops.
(If there is too much
smoke to allow Hush:
Smoke alarm pattern
continues.)
This feature is to be used
only when a known alarm
condition, such as smoke
from cooking, activates
the alarm.
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.

6
3. Troubleshooting Guide
Trouble
Condition
Visual
Indications Audible Indications Action
Low
Battery
Amber LED
blinks every
30 sec.
Chirp every 60 sec. * Push button once to silence for 24 hrs.
(Push button again to clear Hush and
perform a test.)
* Replace battery as soon as possible.
Note: 7 days after Low Battery begins, the
chirps cannot be silenced.
Photo Fault Amber LED
blinks 4 times
every 30 sec.
Chirp every 30 sec. * See Cleaning Your Alarm section.
* Push button once to attempt to reset
the unit.
* If error continues, remove, dispose unit,
and replace as soon as possible.
Memory
Fault
Amber LED
blinks 3 times
every 30 sec
Chirp every 30 sec. * Push button once to attempt to reset
the unit.
* If error continues, remove, dispose unit,
and replace as soon as possible.
End of Unit
Life
Amber LED
blinks twice
every 30 sec.
Double chirp every
30 sec.
* Push button once to silence for 24 hrs.
(Push button again to clear Hush.)
Note: 7 days after End of Unit Life begins,
the chirps cannot be silenced.
* Remove, dispose unit, and replace as soon
as possible.
Stuck Button Amber LED
blinks every
4 sec.
Chirp every 4 sec. * Push button to dislodge it from being
stuck. If button cannot be unstuck,
remove, dispose unit, and replace
as soon as possible.
MCU Failure None Constant Tone * Remove, dispose unit, and replace as soon
as possible.

7
4. Introduction, Product Features And Specifications
Introduction
This alarm detects products of combustion using a multi-criteria optical sensor.
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.
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
•Smoke Sensor: Multi-Criteria Optical
•Smoke Alarm SMART HUSH® Control
•Powered by 9V battery
•Model 2040-DSR-5B uses an oversized (5 in) mounting bracket.

8
5. Limitations Of Smoke Alarms
WARNING: PLEASE READ CAREFULLY AND THOROUGHLY
•Life safety from fire in residential occupancies is based primarily on early notification to occu-
pants of the need to escape, followed by the appropriate egress actions by those occupants.
•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
•Fire warning systems for dwelling units are capable of protecting about half of the occupants
in potentially fatal fires. A smoke alarm may not be effective in some situations, such as
during incendiary fires where the fire grows so rapidly that an occupant’s egress is blocked
even with properly located smoke alarms, or when victims are intimate with the fire (for
example, when a person’s clothes catch fire while cooking), too old or young, or physically or
mentally impaired such that they cannot escape even when warned early enough that es-
cape should be possible. For these people, additional strategies such as protection-in-place
or assisted escape or rescue are necessary.
•For maximum detection of the various types of fires that can occur within the home, includ-
ing fast flaming and slow smoldering, it is recommended that multi criteria smoke alarms
be installed. This model meets the latest residential smoke alarm standards, which includes
enhanced resistance to nuisance alarms from cooking.
•A battery powered alarm must have a battery of the specified type, in good condition and
installed properly.

9
•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, within walls, on roofs, on the other side of a
closed door or other obstruction.
•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
6. 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 in stairways, because 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 construc-
tion.
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.”

11
Figure 6-A
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.
Not within 6 feet of appliances
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.

12
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.
Figure 6-B Figure 6-C
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
Not within 6 feet of appliances
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.

13
•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 the alarm on the wall, use an inside wall with the top edge of 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 Protection 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 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 UNOCCUPIED, AND AT LEAST ONCE A WEEK DURING USE.

14
7. Locations To Avoid
(See Figures 6-A, 6-B, & 6-C for recommended locations.)
•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 and should not be installed within 6 ft of cooking appliances.
•Do not install within 6 ft of heating 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 alarms or a failure to alarm.
•In very humid areas (above 95% RH, non-condensing) as 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 lights may cause nuisance alarms.
•Do not install near vents, flues, or chimneys.
•Do not install near fans, doors, windows or areas directly exposed to the weather..
NOTE: Smoke alarms are not to be used with detector guards unless the combination
(alarm and detector guard) has been evaluated and found suitable for that purpose.

15
8. Installation And Activation
After selecting the proper location for your alarm,
attach the mounting bracket to the wall or ceiling.
To ensure aesthetic alignment of the alarm with the
hallway, or wall, the “A” line on the mounting bracket
should be parallel with the hallway when ceiling
mounted, or horizontal when wall mounted.
(Figures 8-A and 8-B)
•To activate the battery, pull out the battery pull tab.
Battery activation is confirmed by a single chirp.
If the chirp does not occur, remove the battery and
re-install it. Confirm the battery activation chirp
occurs.
NOTE : If the battery compartment is empty,
the alarm cannot mount on the mounting bracket.
•Install the alarm fully on the mounting bracket by
rotating the alarm in a counter clockwise direction.
(Figure 8-C)
NOTE : The alarm will mount to the bracket in 2
positions.
•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 .
Figure 8-A
When mounting
in a hallway, the
“A” line should
be parallel with
the hallway.
Alignment Marks
(”A” Line) on
Mounting
Bracket
Figure 8-B
When wall
mounting, the
“A” line should
be horizontal.
Figure 8-C
A A
Remove
Install

16
9. 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.
See Section 1 for alarm signal descriptions.
Testing
Test your alarm weekly by pressing and releasing the button quickly. A quick beep will
confirm the button has been pushed followed by the test sequence. See Other Alarm Visual
and Audible Indicators table. The alarm will sound if the electronic circuitry, horn, and
battery are working. If the alarm does not sound, or gives erratic or low volume sound, the
unit must be replaced.
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.
Chirping
When End of Unit Life or Low Battery chirping begins, you can temporarily silence these
chirps by pressing the button.
WARNING: REPLACE UNIT AS SOON AS POSSIBLE WHEN IN END OF UNIT LIFE
OR LOW BATTERY MODE.

17
10. 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 to silence the alarm for 8-10 minutes. If the
smoke is not too dense, that unit 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 or 911.
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.

18
11. B at t er y
This alarm is powered by a replaceable 9V battery. Under normal conditions, a fresh
battery should last at least one year.
NOTE: Constant exposure to high or low humidity or temperatures may reduce battery life.
WARNING: THE ALARM IS SEALED AND THE COVER IS NOT REMOVABLE!
Low Battery
This alarm is equipped with a low battery monitor circuit. If the battery capacity is near-
ing the point where it can no longer provide adequate power for all alarm functions,
the low battery condition will occur. See Troubleshooting Guide. The unit must be
replaced within 7 days of the first occurrence of the “Low Battery Warning” to provide
continuous alarm protection.
Replace battery with one of the following approved brands:
ENERGIZER 522; DURACELL MN1604, PC1604; GOLD PEAK 1604A.
These batteries can be purchased at your local retailer.
WARNING: Use only the batteries specified. Use of different batteries may have a
detrimental effect on the alarm.
NOTE: Do not use lithium batteries in this unit. A good safety measure is to replace the
battery at least once a year, or at the same time you change your clocks for daylight
saving time. A missing or improperly installed battery will render the unit inoperable.

19
12. 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 vac-
uum cleaner hose and blowing 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 , the alarm may be in need of cleaning. After cleaning, press the
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 to clean inside. This action will void your
warranty.
WARNING: REINSTALL THE ALARM AS SOON AS POSSIBLE TO ENSURE
CONTINUOUS PROTECTION.

20
13. Good Safety Habits
Develop and Practice a Plan of Escape
Prepare and practice a home escape plan twice a year, including drills at night. Know two
ways out of every room (door & window) and identify a meeting place outside the home
where everyone will gather once they have exited the residence. When two people have
reached the meeting place, one should leave to call 911 while the second person stays to
account for additional family members. Establish a rule that once you’re out, you never
re-enter under any circumstance!
•Make a floor plan indicating all doors and windows and at least two (2) escape routes
from each room. Stories above ground level may need a rope or chain ladder.
•Have a family meeting and discuss your escape plan, showing everyone what to do in
case of fire and where to meet after they leave the house.
•Ensure that small children hear the alarm and wake when it sounds. They must wake
up in order to execute the escape plan. Practice allows all occupants to test your plan
before an emergency. You may not be able to reach your children. It is important they
know what to do.
•Familiarize everyone with the sounds of the smoke alarm and train them to leave your
home when they hear it.
•Current studies have shown smoke alarms may not awaken all sleeping individuals,
and that it is the responsibility of individuals in the household that 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.
•Install and maintain fire extinguishers on every level of the home and in the kitchen,
basement and garage. Know how to use a fire extinguisher prior to an emergency.