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Carbon Monoxide Alarm
User Guide
Model: KN-COP-DP-10YHCA (900-0284CA)
AC Plug-in Operated with Sealed Lithium Battery Backup
with LED Nightlight
ATTENTION: Please take a few minutes to thoroughly read this
user guide which should be saved for future reference and passed
on to any subsequent owner.
P/N 2548-7202-00 EN
What to do When the Alarm Sounds!
Carbon Monoxide Alarm Procedure
WARNING: Activation of the CO
Alarm indicates the presence of Carbon
Monoxide (CO) which can kill you.
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 ignore the 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.
Note: Many times throughout this User 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, but not for use in a boat or recreational vehicle.
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
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 fire and 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, not for use in boats or
recreational vehicles. 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
an 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 Guide
Information About Carbon Monoxide
Product Features and Specifications
Installation Locations
Installation Instructions
Alarm Characteristics
Operating Characteristics
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
Periodically review this alarm user guide and discuss your CO alarm
emergency procedure with all the members of your family. Never ignore
a CO 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”
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 KN-COP-DP-10YHCA 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
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.
• Blocked chimneys or flues, back drafts and changes in air pressure,
corroded or disconnected vent pipes, loose or cracked furnace
• 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.
1. Information About Carbon Monoxide
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 fuelburning 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.
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
1. Information About Carbon Monoxide
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 are
not 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 a
malfunction, 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.
• CO being 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.
2. Product Features and Specifications
Operating Range: 4.4°C (40°F) to 37.8°C (100°F)
Operating range: 10-95% relative humidity (RH), non-condensing
Audible Alarm:
85+ dB at 10’ @ 3.4±0.5 KHz pulsing alarm
120 volts AC, 60 Hz, 90 mA max, 3 volt sealed lithium battery back-up
Alarm Response Times:
70 PPM = 60-240 min., 150 PPM = 10-50 min., 400 PPM = 4-15 min.
2. Product Features and Specifications
Rotating AC Plug
Deactivation /
Discharge Switch
Red Alarm
Green Operate
Light / Ambient
Light Sensor
Peak Level
/ Light
Nightlight /
Escape Light
Low Battery Warning
If the battery power is low, the unit will chirp every 60 seconds, and
the display will show “Lb” to indicate the alarm must be replaced.
When the unit produces a low battery warning, the Low Battery HUSH®
feature allows you to press the Test/Hush button on the alarm and
disable the “chirp” for a period of approximately 10 hours. This gives
you a chance to replace the alarm 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.
If the alarm does not go into Low Battery Hush, the battery power
is below the Low Battery Hush threshold. REPLACE THE ALARM
Ambient Light Sensor
This alarm includes a feature to determine dark or light conditions. This
feature will;
1. Help prevent low battery chirping at night, (when ambient
conditions are dark).
2. Dim the display in low light conditions, (night time and darker
rooms), and brighten the display in bright light conditions.
3. Turn on the Nightlight LED in low light conditions, (unit must be
plugged into AC for Night light operation).
2. Product Features and Specifications
End of Unit Life Warning
IMPORTANT: Ten (10) years after the initial power up, this alarm
will “beep” two times every 30 seconds to indicate that it is time to
replace the alarm. Display will show “End”.
To help identify the date to replace the alarm, a label has been affixed to
the side of the alarm. Write the “replace by” date (ten years from power
up) in a permanent marker on this label.
End of Unit Life Hush Control
The End of unit Life Hush feature allows you to silence End of Unit life
chirping, for a period of 3 days, by pressing the Test/Hush button. This
feature can be used 10 times within 30 days, allowing you to replace the
alarm at a more convenient time. After 30 days, the alarm will no longer
Night Light / Escape Light Feature
This model is equipped with a night light feature. The brightness of the
night light can be adjusted by the user pushing the peak level button and
holding the button as the digital display cycles through a range of numbers
(settings) from 0 to 10. Release the button at the desired setting number
(brightness). If the night light feature is not wanted, push and hold the
peak level button, and then release the button when the display cycles to
the “Off” setting.
Note: The night light feature does not work if the unit is powered by DC only.
The escape light feature can help people exit rooms during alarm
situations. The escape light will brightly illuminate during alarm, and will
remain lit continuously on AC power as long as the alarm condition exists.
On DC power only, the escape light will remain lit continuously as long as
the alarm condition exists and the low battery level has not been reached.
3. Installation Locations
Recommended Installation Locations
CO alarms should be mounted in or
near bedrooms and living areas. It is
recommended that you install a Kidde
CO alarm on each level of your home.
When choosing your installation
locations, make sure you can hear
the alarm from all sleeping areas. If
you install only one CO alarm in your
home, install it near bedrooms, not in
the basement or furnace room.
Recommended Locations
• The CO alarm plugs into a wall socket. Children must be taught not to
handle the CO alarm.
Locations To Avoid
IMPORTANT: Improper location can affect the sensitive electronic
components in this alarm. To avoid causing damage to the unit, to provide
optimum performance, and to prevent unnecessary nuisance alarms:
• Do not install in kitchens, garages or furnace rooms that may expose the
sensor to substances that could damage or contaminate it.
• Do not install in areas where the temperature is colder than 4.4°C (40°F)
or hotter than 37.8°C (100°F) such as crawl spaces, attics, porches and
• Do not install within 1.5 m (5’) of heating or cooking appliances. (Kidde
recommends 4.5 m (15’) to prevent nuisance alarms).
• Do not install near vents, flues, chimneys or any forced/unforced air
ventilation openings.
• Do not install near ceiling fans, doors, windows or areas directly exposed
to the weather.
• Do not install in dead air spaces, such as peaks of vaulted ceilings or
gabled roofs, where CO may not reach the sensor in time to provide early
• Do not install this unit near deep-cell large batteries. Large batteries have
emissions that can cause the alarm to perform at less than optimum
• Do not obstruct the vents located on the alarm. Do not place the alarm
where drapes, furniture or other objects block the flow of air to the
4. Installation Instructions
How to Install Your Alarm
To install:
1. Remove the switch cover.
2. Choose
a standard 120V unswitched outlet
to plug the alarm into.
3. If outlet is mounted sideways (horizontally),
rotate the plug and plug the alarm in.
Note: This model is equipped with a feature that automatically activates the
battery backup when the alarm is plugged into an AC outlet for the first time.
! CAUTION: Do not rotate the alarm while it is plugged into an outlet, as
damage to plug may result.
5. Alarm Characteristics
Carbon Monoxide Alarm Indicator
When the alarm senses a dangerous level of CO, the unit will emit a loud
alarm pattern. The alarm pattern is 4 quick beeps followed by 5 seconds of
silence. This cycle repeats as long as a dangerous CO conditions exist. The
red Alarm LED will flash the same pattern, the Escape light will illuminate,
and the PPM will be displayed on the digital display.
The digital display will be brightly lit if the unit is in alarm.
WARNING: If at any time you test the alarm and it does not perform as
described, have it replaced immediately.
6.Operating Characteristics
When you first power up the alarm: The red Alarm LED will light and
the alarm will chirp once.
CO alarm power indicators:
AC - Digital display constantly on.
DC Only - Green LED flashes briefly once every 60 seconds.
Within a few minutes, your carbon monoxide alarm will start monitoring
for CO and will continue to do so as long as it receives power.
Whenever the KN-COP-DP-10YHCA is operating, the digital display will display
“0” (with AC applied) to indicate the unit is monitoring for CO. If the alarm
senses dangerous levels of CO, the digital display will alternate between “CO”
and the measured CO concentration in parts per million (PPM), and the alarm
will emit an audible alarm pattern, and the Escape light will illuminate.
6.Operating Characteristics
This alarm will display a “0” if CO concentrations between 0 and 30 PPM have
been detected within the last 15 seconds.
When the unit is first powered up, the digital display will show three “eights” –
indicating the alarm is in the start-up mode. The three “eights” will remain for
approximately 5 seconds. After 5 seconds, the alarm should display “0” and begin
monitoring the air for CO and will continue to do so as long as it receives power.
The digital display will be brightly lit if the unit is in alarm, or in high light, and
then will become dim in the standby condition during low light conditions. The
Night light, in low light conditions with AC applied, will illuminate.
The following table illustrates the possible digital displays, describes the
audible alarm patterns, and the recommended actions to take.
Operating and Alarm Characteristics
LED Display Shows
Alarm Sound Unit Status An alternating display of
“CO” and the
CO concentration from 30-999.
Escape light is on.
4 quick beeps, 5
seconds silence,
Alarm condition.
concentrations of CO
Refer to “What to do
When the Alarm Sounds”
(inside front cover)
“---” then “888”.
Escape light briefly lit.
4 quick beeps,
Self checking (Test
5 seconds silence, button was pressed)
repeated once
None – CO has not been
Steady “0” displayed.
Display alternates between One quick beep
‘Lb” and current CO level, every
60 seconds
Normal AC operation
(sensing no CO) and with
a good battery.
AC powered and
in Low Battery
Replace alarm.
Steady “Err “displayed
One quick beep Unit malfunction
every 30 seconds
If “Err” continues,
unit has malfunctioned
and must be replaced
immediately. Unit will not
respond to CO. Press the
Peak Level button while
unit is in “Err”mode to
obtain error code and call
Product Support line.
An alternating display
of “PCO” and the CO
concentration (PPM)
Unit has detected
100ppm or more CO
Push test/reset button,
check appliances
No display. Green LED
flashes briefly once
every 60 seconds.
Battery backup
operation. Unit
monitoring for CO.
Verify AC power is restored
as soon as possible to
conserve battery.
“End” displayed. Red
LED flashes two times
every 30 seconds
2 quick beeps
End of unit life
every 30 seconds.
Replace unit immediately.
Refer to Section 2 for
End of Life Warning and
Discharge section on the
next page.
6.Operating Characteristics
Peak Level Event Alert
A Peak Level Event occurs whenever CO concentrations are greater than
100 PPM. The display will alternate between “PCO” and the currently
measured CO concentration, (0-999), even if that concentration has
returned to 0 PPM, (see Peak Level Memory section below to display peak
level CO from the event). The display will alternate continuously on AC
power, and will briefly display once every minute on DC only.
1. The unit goes into alarm or,
2. CO concentration level drops below 100 PPM AND the user clears the
Peak CO Memory, (see Peak Level Memory Reset section below).
If the CO concentration is greater than 30 PPM and less than 100 PPM,
the display will indicate the measured CO concentration only.
Peak Level Memory
When the Peak Level button is pressed and held, the display shows the
highest CO reading taken by the CO alarm since its last reset or power
up. The Peak Level display feature will display levels between 30-999
PPM. Although the Peak Level feature will display levels below 30 PPM,
these levels will not result in an alarm no matter how long the device is
exposed to these levels. The Peak Level feature is helpful in identifying if
you have had a CO reading since resetting the alarm.
Concentrations of CO between 1 and 30 PPM can often occur in
normal, everyday conditions. Concentrations of CO below 30 PPM may
be an indication of a transient condition that may appear today and
never reappear. Some CO conditions may start out as low level leaks but
could develop into CO concentrations that may become harmful.
Peak Level Memory Reset
Press and hold the Peak Level button, then press and hold the Test/
Hush button. When the number on the display reads “0”, release
both buttons. The memory will be cleared and the alarm will begin
monitoring for CO.
At end of unit life, locate the deactivation /
discharge switch and push the switch in the
direction shown, until switch clicks into place.
This will silence the end of unit life or low battery
chirping, drain the battery, and render the unit
safe for disposal.
7. Maintenance
NOTE: This unit is sealed. The cover is not removable.
Due to the loudness of the alarm, we suggest that you place your
fingers over the sounder opening while testing your alarm.
! Caution: Continuous exposure to the high sound level of this alarm
over an extended period of time may cause hearing loss.
To test the alarm, press the Test/Hush button. If the unit is operating properly,
you will hear 4 quick beeps – followed by 5 seconds of silence – followed
by 4 quick beeps. The display will show in sequence “---” then “888”, and
the Escape light will illuminate. Within several seconds the unit will return to
monitor for CO.
Note: You do not need to press the Test button to take a CO reading.
Maintenance Tips
To keep your alarm in good working order, you must follow these steps:
• Test the alarm once a week by pressing the Test/Reset button.
• Vacuum the alarm cover once a month to remove accumulated dust.
• Never use detergents or solvents to clean the alarm. Chemicals can
permanently damage or temporarily contaminate the sensor.
• Avoid spraying air fresheners, hair spray, paint or other aerosols near the
• Do not paint the unit. Paint will seal the vents and interfere with proper
sensor operation.
Move the CO Alarm to a remote location, to prevent possible damage or
contamination of the sensor, prior to performing any of the following:
• Staining or stripping floors or furniture, painting or wall-papering
• Using aerosols or adhesives
WARNING: Reinstall the CO Alarm as soon as possible to assure
continuous protection.
The following is a list of substances that at high levels can damage the sensor
or cause temporary readings that are not CO readings:
• Ethylene, ethanol, alcohol, iso-propanol, benzene, toluene, ethyl acetate,
hydrogen, hydrogen sulfide and sulfur dioxide.
• Also most aerosol sprays, alcohol based products, paint, thinner, solvent,
adhesive, hair spray, after shave, perfume, auto exhaust (cold start) and
some cleaning agents.
8. Limited Warranty
Ten Year Limited Warranty
If after reviewing this user guide you feel that your alarm is defective in any way, do not
tamper with the unit. In many cases, the quickest way to exchange your alarm is to return
it to the original place of purchase. Alternatively, you may return it for servicing to Kidde. If
you have questions, call Kidde Customer Service at 1-800-880-6788.
Kidde warrants that the enclosed alarm will be free from defects in material and workmanship
or design under normal use and service for a period of ten years from the date of purchase.
The obligation of Kidde under this warranty is limited to repairing or replacing the alarm or
any part which we find to be defective in material, workmanship or design, free of charge,
upon sending the alarm with proof of date of purchase, postage and return postage prepaid,
to: Kidde Canada Inc., P.O. Box 40, Apsley, ON K0L 1A0.
This warranty shall not apply to the alarm if it has been damaged, modified, abused or
altered after the date of purchase or if it fails to operate due to improper maintenance or
inadequate A.C. power. Any implied warranties arising out of this sale, including but not
limited to the implied warranties of description,merchantability and fitness for a particular
purpose, are limited in duration to the above warranty period. In no event shall the
Manufacturer be liable for loss of use of this product or for any indirect, special, incidental
or consequential damages, or costs, or expenses incurred by the consumer or any other user
of this product, whether due to a breach of contract, negligence, strict liability in tort or
otherwise. The Manufacturer shall have no liability for any personal injury, property damage
or any special, incidental, contingent or consequential damage of any kind resulting from
gas leakage, fire or explosion.
Since some provinces do not allow limitations of the duration of an implied warranty or
do not allow the exclusion or limitation of incidental or consequential damages, the above
limitations or exclusions may not apply to you. While this warranty gives you specific legal
rights, you may also have other rights which vary from province to province. The above
warranty may not be altered except in writing signed by both parties hereto.
IMPORTANT: Do not remove unit back cover. Back cover removal will void warranty.
Your Kidde Carbon Monoxide Alarm is not a substitute for property, disability, life or other
insurance of any kind. Appropriate insurance coverage is your responsibility. Consult your
insurance agent.
Kidde Canada Inc., P.O. Box 40, Apsley, ON K0L1A0
Call our Consumer Hotline at 1-800-880-6788 or contact
us at our website at
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