Kidde 900-0235 User manual

Manual P/N 820-1562 Rev.A08/2008
ATTENTION: Please take a few minutes to thoroughly read this
user’s guide which should be saved for future reference and
passed on to any subsequent owner.
Carbon Monoxide Alarm
User’s Guide
900-0235 and 900-0234
KN-COB-DP-LS-CA
CarbonMonoxide Alarm
Carbon Monoxide Alarm
SINGLE STATION CARBON
MONOXIDE ALARM
AC Plug-in Operated with 9 V Battery Backup
KN-COP-DP-LS-CA
with Digital Display
900-0234
900-0235

Carbon Monoxide Alarm Procedure
If alarm sounds 4 quick beeps, 5 seconds off:
1) Immediately move to fresh air - outdoors or by an open
door/window. Do a head count to check that all persons are
accounted for. Do not re-enter 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.
2) Call your emergency services (Fire Department or 911);
Never restart the source of a CO problem until it has been
corrected. Never ignorethe sound of the alarm!
If the alarm is sounding, pressing the test/reset button will
terminate the alarm. If the CO condition that caused the alert
in the first place continues, the alarm will reactivate. If the
unit alarms again within six minutes, it is sensing high levels
of CO which can quickly become a dangerous situation.
WARNING: Activation of the CO
Alarm indicates the presence of Carbon
Monoxide (CO) which can kill you.
PHONE NUMBER:
What to do When the Alarm Sounds!

Welcome
Note: Many times throughout this User’s Guide, we will refer to
Carbon Monoxide as “CO”.
This Kidde carbon monoxide (CO) alarm is an important part of your
family’s home safety plan. This alarm has been designed and tested to
detect CO buildup in a residential environment. Your alarm is for use
specifically in the home. As an owner of a CO alarm, there are some
basic facts you should know about for your protection.
Many people think that CO alarms operate like smoke alarms. Like
smoke alarms, CO alarms monitor the air in your home and sound a
loud alarm to warn you of trouble. The way you respond to a CO alarm
is quite different than a smoke alarm. That’s because a house fire and a
CO problem are two distinctly different situations. If your smoke alarm
were to alarm, you would quickly be able to judge the level of danger
you were in with your senses. You can see and smell the smoke, feel the
heat, see, and possibly hear the fire burning. You can also readily see if
your smoke alarm is alarming in a non-emergency situation. Because
your sense of sight, smell, hearing and touch give you information, you
can almost instantly judge what action to take if you hear your smoke
alarm.
CO is an invisible, odorless, tasteless and non-irritating gas – completely
undetectable to your senses. That’s why it is important to your safety
that you have a CO alarm.
Important Warning Statements
IMPORTANT: This carbon monoxide alarm is designed to detect
carbon monoxide from ANY source of combustion. It is NOT
designed to detect smoke, fire, or any other gas.
WARNING: Carbon monoxide alarms are not smoke alarms. This
carbon monoxide alarm is not a substitute for installing and
maintaining an appropriate number of smoke alarms in your
home.
This carbon monoxide alarm will not sense smoke, fire, or any
poisonous gas other than carbon monoxide even though carbon
monoxide can be generated by fire. For this reason you must
install smoke alarms to provide early warning of fire and to
protect you and your family from fireand its related hazards.
CAUTION: This alarm will only indicate the presence of carbon
monoxide at the sensor. Carbon monoxide may be present in
other areas.

Important Warning Statements
WARNING: This product is intended for use in ordinary indoor
locations of family living units. It is not designed to measure
compliance with commercial or industrial standards. It is not
suitable for installation in hazardous locations as defined in your
local building code.
The installation of this device should not be used as a substitute
for proper installation, use and maintenance of fuel burning
appliances, including appropriate ventilation and exhaust
systems. It does not prevent CO from occurring, nor can it solve
and existing CO problem.
WARNING: This device is designed to protect individuals from
acute effects of carbon monoxide exposure. It may not fully
safeguard individuals with specific medical conditions. If in doubt,
consult a medical practitioner.
Individuals with medical problems may consider using warning
devices which provide audible and visual signals for carbon
monoxide concentrations under 30 PPM.
This carbon monoxide alarm requires a continuous supply of
electrical power – it will not work without power.Models
without battery backup will not operate during power failure.
This alarm has not been investigated for carbon monoxide
detection below 70 PPM.
Contents of This User’sGuide
1. Information About Carbon Monoxide
2. Product Features and Specifications
3. Installation Locations
4. Installation Instructions
5. Alarm Characteristics
6. 900-0235 Operating Characteristics
7. 900-0234 (with digital display) Operating Characteristics
8. Maintenance
9. 900-0235 Limited Warranty
10. 900-0234 Limited Warranty

1. Information About Carbon Monoxide
General Carbon Monoxide Information
Carbon monoxide is a colorless, odorless and tasteless poison gas that
can be fatal when inhaled. CO inhibits the blood’s capacity to carry
oxygen.
Periodically review this alarm manual and discuss your CO alarm
emergency procedure with all the members of your family. Never ignore
aCO alarm. A true alarm is an indication of potentially dangerous levels
of CO. CO alarms are designed to alert you to the presence of CO
before an emergency – before most people would experience symptoms
of CO poisoning, giving you time to resolve the problem calmly.
Determine if anyone in the household is experiencing symptoms of CO
poisoning. Many cases of reported CO poisoning indicate that while
victims are aware they are not well, they become so disoriented they are
unable to save themselves by either exiting the building or calling for
assistance. Also, young children and household pets may be the first
affected. You should take extra precautions to protect high-risk persons
from CO exposure because they may experience ill effects from CO at
levels that would not ordinarily affect a healthy adult.
Symptoms of CO Poisoning
The following common symptoms are related to CO poisoning and
should be discussed with ALL members of the household.
Mild Exposure:
Slight headache, nausea, vomiting, fatigue (often described as “flu-like”
symptoms).
Medium Exposure:
Severe throbbing headache, drowsiness, confusion, fast heart rate.
Extreme Exposure:
Unconsciousness, convulsions, cardio-respiratory failure, death.
If you experience even mild symptoms of CO poisoning, consult your
doctor immediately!

1. Information About Carbon Monoxide
Carbon Monoxide PPM Levels
(model 900-0234 with digital display only)
Model 900-0234 is equipped with a digital display that shows levels of
CO (displayed in PPM – parts per million). Learn the difference between
dangerous, high, mid and low levels.
Dangerous Levels:
When someone is experiencing symptoms of CO poisoning and CO
readings are generally above 100 PPM. Anytime someone is experiencing
the symptoms of CO poisoning this should be treated as an emergency.
See “What to do When the Alarm Sounds” (inside front cover).
High Levels:
Generally above 100 PPM, with no one experiencing symptoms. This
should be treated as an urgent situation. See “What to do When the
Alarm Sounds” (inside front cover).
Mid Levels:
Generally between 50 PPM to 100 PPM. This should be cause for
concern and should not be ignored or dismissed. See “What to do
When the Alarm Sounds” (inside front cover).
Low Levels:
Generally below 50 PPM. Kidde recommends you take action to
eliminate the source of CO. See “What to do When the Alarm Sounds”
(inside front cover).
IMPORTANT: The 900-0235 does not have a digital display and
does not display carbon monoxide levels in PPM. If the alarm
sounds, it should be treated as a potentially serious condition.
See “What to do When the Alarm Sounds” (inside front cover).
Possible Sources of Carbon Monoxide
Inside your home, appliances used for heating and cooking are the most
likely sources of CO. Vehicles running in attached garages can also
produce dangerous levels of CO.
CO can be produced when burning any fossil fuel, such as gasoline,
propane, natural gas, oil and wood. It can be produced by any fuel-
burning appliance that is malfunctioning, improperly installed, or not
ventilated correctly, such as:
•Automobiles, furnaces, gas ranges/stoves, gas clothes dryers, water
heaters, portable fuel burning space heaters and generators,
fireplaces, wood-burning stoves and certain swimming pool heaters.

1. Information About Carbon Monoxide
•Blocked chimneys or flues, back drafts and changes in air pressure,
corroded or disconnected vent pipes, loose or cracked furnace
exchangers.
•Vehicles and other combustion engines running in an open or closed
garage, attached or near a home.
•Burning charcoal or fuel in grills and hibachis in an enclosed area.
Conditions That Can Produce Carbon Monoxide
The following conditions can result in transient CO situations:
•Excessive spillage or reverse venting of fuel-burning appliances caused
by outdoor ambient conditions, such as, wind direction and/or
velocity, including high gusts of wind, heavy air in the vent pipes
(cold/humid air with extended periods between cycles).
•Negative pressure resulting from the use of exhaust fans.
•Simultaneous operation of several fuel-burning appliances competing
for limited internal air.
•Vent pipe connections vibrating loose from clothes dryers, furnaces, or
water heaters.
•Obstructions in, or unconventional, vent pipe designs which can
amplify the above situations.
•Extended operation of unvented fuel-burning devices (range, oven,
fireplace, etc.).
•Temperature inversions which can trap exhaust gases near the ground.
•Vehicle idling in an open or closed garage, or near a home.
To be safe, know the possible sources of CO in your home. Keep fuel-
burning appliances and their chimneys and vents in good working
condition. Learn the early symptoms of exposure, and if you suspect CO
poisoning, move outside to fresh air and get emergency help. Your first
line of defense is an annual inspection and regular maintenance of your
appliances. Contact a licensed contractor or call your local utility
company for assistance.
Information About Carbon Monoxide Alarms –
What They Can and Cannot Do:
CO alarms provide early warning of the presence of CO, usually before a
healthy adult would experience symptoms. This early warning is possible,
however, only if your CO alarm is located, installed and maintained as
described in this guide.

1. Information About Carbon Monoxide
Because carbon monoxide is a cumulative poison, long-term exposures
to low levels may cause symptoms, as well as short-term exposures to
high levels. This Kidde unit has a time-weighted alarm – the higher the
level of CO present, the sooner the alarm will be triggered.
This CO alarm can only warn you of the presence of CO. It does not
prevent CO from occurring, nor can it solve an existing CO problem. If
your unit has alarmed and you’ve provided ventilation by leaving your
windows and doors open, the CO buildup may have dissipated by the
time help responds. Although your problem may appear to be
temporarily solved, it’s crucial that the source of the CO is determined
and that the appropriate repairs are made.
This CO alarm is designed to act as a monitor; it is not designed for use
as a short-term testing device to perform a quick check for the presence
of CO.
CO alarms have limitations. Like any other electronic device, CO alarms
arenot fool-proof. CO alarms have a limited operational life. You must
test your CO alarm weekly, because it could fail to operate at any time.
If your CO alarm fails to test properly,or if its self-diagnostic test reveals
amalfunction, immediately have the unit replaced. This alarm will not
monitor CO levels while in an error condition.
CO alarms can only sense CO that reaches the unit’s sensor. It’s possible
that CO may be present in other areas without reaching the alarm. The
rate and ability that which CO reaches the alarm may be affected by:
•Doors or other obstructions.
•Fresh air from a vent, an open window or other source.
•CObeing present on one level of the home and not reach a CO alarm
installed on a different level. (For example, CO in the basement may
not reach an alarm on the second level, near the bedrooms).
For these reasons, we recommend you provide complete coverage by
placing a CO alarm on every level of the home. Please carefully read all
information on properly installing this CO alarm.
CO alarms should not be used to detect the presence of natural gas
(methane), propane, butane, or other combustible fuels.

Tamper-Resist Feature
This is an alert to notify consumers the unit has been unplugged or has
come loose from the outlet. This feature is not activated for two minutes
after power is first supplied to give you time to plug the unit in after
activating the battery. This feature is also disabled once the battery
voltage has reached a level to cause a low battery warning chirp. This
can be defeated for two minutes by pressing the Test button while the
unit is removed from the plug to allow the battery to be changed
without the 85dB alarm sounding. The feature can also be disabled by
pressing in the Tamper-Resist Activation switch and moving the disable
slide towards the switch. Use the included screw to secure the battery
cover and increase tamper resistance.
2. Product Features and Specifications
Model 900-0235 Sounder
Alarm
Green
Operate
Light
Test/Reset
Button
Peak
Level
Red
Alarm
Light Model 900-0234
Tamper-Resist
Activation Switch
(see Normal Operating
Characteristics)
Tamper-Resist
Disable Switch
9Volt
Battery Door
Screw
(used with
Tamper-Resist
Feature)

2. Product Features and Specifications
Low Battery Warning
If the 9V battery is missing or battery power is low, the unit will chirp
every 15 seconds to indicate the battery must be replaced. If the battery
is depleted beyond the point of having the capacity to operate the unit,
it will chirp every 30 to 45 seconds and will NOT respond to the test
button being pressed if operating on battery power. THE BATTERY
MUST BE REPLACED IMMEDIATELY!
Low Battery HUSH®CONTROL
When the battery needs to be replaced, the unit will produce a low
battery warning. The Low Battery HUSH®feature allows you to press the
button on the alarm and disable the “chirp” for a random period of up
to 12 hours. This gives you a chance to replace the battery at a more
convenient time without sacrificing your safety by disconnecting the
alarm from power. During this Low Battery HUSH®period, your alarm is
monitoring for CO.
IMPORTANT:Seven (7) years after the initial power up, this alarm
will “beep” every 30 seconds to indicate that it is time to replace
the alarm. Replace the alarm immediately! It will not detect CO in
this condition.
Tohelp identify the date to replace the alarm, a label has been affixed to
the side of the alarm. Write the “replace by” date (seven years from
power up) in a permanent marker on this label.
Temperature:
Operating Range: 4.4°C(40°F) to 37.8°C (100°F)
Humidity:
Operating range: 10-95% non-condensing
Audible Alarm:
85+ dB at 10’ @ 3.4±0.5 KHz pulsing alarm
Sensor:
Electrochemical
Power:
120 volts AC, 60 Hz, 60 mA max, 9 volt battery back-up
Alarm Response Times:
70 PPM = 60-240 min., 150 PPM = 10-50 min., 400 PPM = 4-15 min.