DSC WS4913 - Installation Manual
WS4913 Series Wireless
Carbon Monoxide Alarm
Installation and Operating Instruction
This Manual shall be left with the
Owner / User of this equipment.
This product is intended for INDOOR USE
in Non-hazardous locations ONLY.
Read this instruction sheet thoroughly before installation and
use of the WS4913 wireless carbon monoxide alarm
The WS4913 is a wireless electrochemical Carbon Monoxide alarm,
which is effective for detecting any buildup of carbon monoxide, also
known as CO gas, in your home or office. Your CO alarm includes the
following features (See figure 1 as below):
(1) Easy to install
(2) Continuous monitoring for presence of carbon monoxide
(3) A loud (85 dB) alarm when a buildup of carbon monoxide is detected
(4) A test button to provide visual and audible indication that the unit is
(5) Self-diagnostics to immediately indicate any troubles
(6) Seamless integration with DSC controls panels using the panel bell
and system keypad to annunciate carbon monoxide build up or
(7) Compliant with the requirements of UL Standard 2075
The green LED flashes approx. once every 60 seconds, indicating that the
device has power and is actively sampling the carbon monoxide level in
During the first 5 minutes after inserting the battery, the orange LED
will flash every 10 seconds and the unit will chirp every 60 seconds to
indicate that the unit is in warm up mode.
The CO alarm will go into alarm when the concentration of carbon
monoxide (CO) in the air around the device exceeds the 'alarm' threshold,
During an alarm, the red LED light flashes rapidly and buzzer sounds with
repeating 4 quick beeps and pause 5 seconds and then 4 quick beeps.
After 4 minutes of being in alarm the pause between beeps will change to
60 seconds. The alarm will continue to sound until the concentration of CO
in the air around the CO alarm drops below the ‘alarm’ threshold or the
reset button is pressed.
When properly enrolled on a DSC control panel, which supports the
WS4913 Wireless Carbon Monoxide Alarm, the CO alarm will be
wirelessly communicated to the control panel. The control panel will then
annunciate the CO alarm using the control panel bell output and display
the alarm and zone number which generated the alarm on the system
keypad. At the same time the control panel will communicate the alarm
to the central station to dispatch the appropriate authorities. Please refer
to your control panel installation manual for details
The removal of the CO alarm from the mounting plate initiates a 'tamper'
The built in sounder on the WS4913 will chirp once per minute and the
yellow LED will be ON steady.
Placing the unit on the mounting plate will restore the tamper condition.
When properly enrolled on a DSC control panel the Tamper will be
annunciated. Please refer to the PC9155-433
The WS4913 is powered by a 3 V DC Duracell Ultra DL123AB
Use only the batteries as specified above. Use
of a different battery may have a detrimental effect on alarm
(See figure 2 as below):
(1) Open the battery cover to expose the battery compartment.
(2) Remove the old battery and properly dispose of it as recommended by
the battery manufacturer.
(3) Note the polarity of the battery and ensure it is correctly installed as
per the polarity markings indicated on both sides of the battery
compartment, make sure to carefully seat the red battery warning flag
in the recess of the battery compartment.
(4) Gently close the battery cover. The battery cover of CO alarm will not
close if the battery is not properly installed.
Constant exposures to high or low temperatures or
high humidity may reduce battery life.
This carbon monoxide alarm is designed to detect carbon monoxide gas
from ANY source of combustion. It is NOT designed to detect smoke,
fire or any other gas, unless the product has been investigated and
determined to comply with the applicable requirements.
The WS4913 has been designed to ensure that there is at least 30 days
of battery life remaining once the ‘low battery’ condition has been
annunciated and transmitted to the DSC control panel.
When the battery voltage is low the built in sounder on the WS4913 will
'chirp' once every 60 seconds and the yellow LED will flash once per
minute until battery failure. When properly enrolled on a DSC control
panel the ‘Low Battery’ will be annunciated on the system keypad and the
zone will show as being in Fault. Please refer to the panel
for details. Replace the battery as soon as possible after low
battery indication is provided.
If the WS4913 self-diagnostics function detects a trouble condition it will be
indicated by the trouble indicator LED.
Malfunction (Error) mode
The yellow LED flashes 3 times and the
built in sounder chirps once every minute. This trouble indicates an internal
fault and the unit will need to be replaced.
Low sensitivity mode
The yellow LED flashes 2 times and the built in
sounder chirps once every minute. This trouble indicates an internal fault
and the unit will need to be replaced.
End of life signal mode
The yellow LED flashes 4 times and the built
in sounder chirps once every minute. This indicates that the WS4913 CO
Detector is reaching the end of this useful life (around 6 years after the unit
is purchased), please replace with a new WS4913 CO detector.
When properly enrolled on a DSC control panel the ‘trouble condition’ will
be annunciated on the system keypad. Please refer to the PC9155-433
panel Installation Manual
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Locations to install your CO alarm
Since CO gas moves freely in the air, the suggested location is in or as
near as possible to sleeping areas of the home. The human body is most
vulnerable to the effects of CO gas during sleeping hours. For maximum
protection, a CO alarm should be located outside primary sleeping areas
or on each level of your home.
below indicates the suggested
locations in the home. The electronic sensor detects carbon monoxide,
measures the concentration and sounds a loud alarm before a potentially
harmful level is reached.
Do not place the CO alarm in the following areas:
(a) Where the temperature may drop below 4.4
or exceed 37.8
(b) Near paint thinner fumes
(c) Within 5 feet (1.5 meter) of open flame appliances such as furnaces,
stoves and fireplaces
(d) In exhaust streams from gas engines, vents, flues or chimneys
(e) Do not place in close proximity to an automobile exhaust pipe; this
will damage the Alarm
(f) Keep the CO alarm away from excessively dirty, dusty or greasy
areas such as kitchens and garages. Ensure adequate ventilation
when using household cleaners and chemicals as these can affect
Installing the CO Alarm
The WS4913 CO alarm is easy to install to protect you and your family in
your home, cottage, cabin and/or office.
To install the CO alarm (See figure 4. as below):
1. For a wall mounted location, the detector should be at least six
inches(15cm) from the ceiling; for a ceiling mounted location, the
detector should be at least 12 inches (30.5cm) from any wall.
2. Prior to mounting the WS4913 in its final location be sure to perform the
wireless device placement test to ensure reliable communication with
the control panel. Refer to the
At the place where you are going to install the alarm, draw a straight
line four (4) inches (10cm) long.
4. Remove the mounting bracket from your unit by rotating it
5. Place the bracket so that the two longest hole slots are aligned on the
line. In each of keyhole slots, draw a mark to locate a mounting plug
6. Remove the bracket.
Using a 3/16-inch (5mm) drill bit, drill two holes at the marks and insert
Using the two screws and wall plugs supplied, attach the bracket to
Carefully center the WS4913 on the mounting bracket and turn it
clockwise to fix it into place. Pull outward on the alarm to make sure it
is securely attached to the mounting bracket.
The 6 digit serial number located on the back of the CO alarm housing
must be used to enroll the CO alarm onto the alarm control panel using
Installers programming mode. To ensure there is no interference with
similar systems in the adjacent units of a multilevel multiunit dwelling such
as an apartment building, the PC9155-433 has been designed such that
each installation has a unique System Identification code which works in
conjunction with the device serial numbers. Please refer to your control
You should know about Carbon Monoxide
Carbon monoxide, also known as "CO" by the chemical form, is considered to
be a highly dangerous poisonous gas, because it is colorless, odorless or
tasteless and very toxic. In general, biochemistry phenomena have shown that
the presence of CO gas inhibits the blood's capacity to transport oxygen
throughout the body, which can eventually lead to brain damage. In any
enclosed space (home, office) even a small accumulation of CO gas can be
Although many products of combustion can cause discomfort and adverse
health effects, it is CO gas which presents the greatest threat to life.
Carbon monoxide is produced by the incomplete combustion of fuels such as
natural gas, propane, heating oil, kerosene, coal, charcoal, gasoline, or wood.
The incomplete combustion of fuel can occur in any device which depends on
burning for energy or heat such as furnaces, boilers, room heaters, hot water
heaters, stoves, grills, and in any gasoline powered vehicle or engine (e.g.
generator set, lawnmower). Tobacco smoke also adds CO to the air you
When properly installed and maintained, your natural gas furnace and hot
water heater do not pollute your air space with CO. Natural gas is known as a
"clean burning" fuel because under correct operating conditions, the
combustion products are water vapor and carbon dioxide (CO
), which is not
toxic. The products of combustion are exhausted from furnaces and water
heaters to the outside by means of a fuel duct or chimney.
Correct operation of any burning equipment requires two key conditions:
(a) An adequate supply of air for complete combustion.
(b) Proper venting of the products of combustion from the furnace
through the chimney, vent or duct to the outside.
Typical carbon monoxide gas problems are summarized here:
(a) Equipment problems, due to defects, poor maintenance, damaged
and cracked heat exchangers.
(b) Collapsed or blocked chimneys or flues, dislodged, disconnected or
(c) Downdraft in chimneys or flues. This can be caused by very long or
circuitous flue runs, improper location of flue exhaust or wind
(d) Improper installation or operation of equipment, chimney or vents
(e) Air tightness of house envelop/inadequate combustion of air
Inadequate exhaust of space heaters or appliances
(g) Exhaust ventilation/fireplace competing for air supply.
Potential sources of carbon monoxide in your home or office include clogged
chimney, wood stove, wood or gas fireplace, automobile and garage, gas
water heater, gas appliance, gas or kerosene heater, gas or oil furnace, and
More information about conditions which result in transient
1.Excessive spillage or reverse venting of fuel burning appliances caused by
(a.)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)
(b.)Negative pressure .differential resulting from the use of exhaust fans.
(c.)Simultaneous operation of several fuel burning appliances competing
for limited internal air.
(d.)Vent pipe connection vibrating loose from clothes dryers, furnaces, or
(e.)Obstructions in or unconventional vent pipe designs which amplify the
2. Extended operation of unventilated fuel burning devices (range, oven,
3.Temperature inversions which can trap exhaust gases near the ground.
4. Car idling in an open or closed attached garage, or near a home
Possible symptoms of Carbon Monoxide Poisoning
Carbon monoxide is colorless, odorless, tasteless, and very toxic. When
inhaled, it produces an effect known as chemical asphyxiation. Injury is due to
the combining of CO with the available hemoglobin in the blood, lowering the
oxygen-carrying capacity of the blood. In the presence of CO gas, the body is
quickly affected by oxygen starvation.
The following symptoms are related to CO poisoning and should be discussed
with all members of the household:
(a) Mild exposure: slight headache, nausea, vomiting, fatigue (often
described as "Flu-like" symptoms).
(b) Medium exposure: severe throbbing headache, drowsiness,
confusion, fast heart rate
(c) Extreme exposure: unconsciousness, convulsions, cardio-
respiratory failure, death.
(d) Many cases of reported
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. Young children and household
pets are typically the first affected.
Figure 3: Location for placing CO
alarm in a multi-floor
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Many victims of carbon monoxide poisoning indicate that while they were aware
that they were ill , they became so disoriented and confused that they were
unable to help themselves by either exiting the building or calling for a
assistance. Young children and household pets may be the first affected.
Exposure during sleep is particularly dangerous, because the victim usually
does not awaken.
Actions to take when CO alarm sounding
Actuation of your CO alarm indicates the presence
of carbon monoxide (CO) which can kill you. If alarm sounds:
1. Operate test/reset button
2. Call your emergency services(___ _______) or fire department
3. Immediately move to fresh air –outdoors or by an open door
Do a head count to check that all persons are
accounted for. 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.
After following steps 1-3, if your alarm reactivates within a 24 hour
period, repeat steps 1-3 and call a qualified appliance technician
( ) to investigate for sources of CO from fuel burning
equipment and appliances, and inspect for proper operation of
this 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
manufacturers’ instruction, or contact the manufacturers directly,
for more information about CO safety and this equipment. Make
sure that motor vehicles are not, and have not been, operating in
an attached garage or adjacent to the residence.
In case of harmful levels of CO gas being detected, your CO alarm
WS4913 will go into a CO alarm mode as mentioned above. In “CO Alarm
Mode” take the following necessary actions immediately:
(a) If there is anyone experiencing the effects of carbon monoxide
poisoning such as headache, dizziness, nausea or other flu-like
symptoms, call your fire department right away or 911. You should
evacuate all the people in the premises immediately. Do a head
count to check that everybody is accounted for.
(b) Do not re-enter the premises until the problem has been corrected
and the CO gas has been dispersed out and a safe level is reached.
(c) If no symptoms exist, immediately
ventilate the home by opening
windows and doors. Turn off fuel burning appliances and call a
qualified technician or your utility company to inspect and repair
your problem before restarting appliances.
Normally an activation of the CO alarm indicates the presence of CO gas.
However, the CO gas can be extremely fatal, if it is not detected. The
source of the CO gas may come from several possible situations, please
refer to the list of sources of carbon monoxide on page 2.
This CO alarm will only indicate the presence of CO
gas at the sensor. However, you have to be aware that the CO gas may
be present in other areas in the premises.
Actions to take after the problem is corrected
Once the source of CO gas in the premises has been eliminated, the
alarm of the CO alarm unit should be off. After waiting for 10 minutes,
push the Test button to test the CO alarm unit so that you can make sure
that it is working properly again.
Test and silence your CO alarm
Follow the test procedure described here or contact your CO alarm
dealer or installer for testing instructions . DSC recommends that
you test the entire alarm system at least one a week to verify the
operation of all functions.
The test/reset button is used to test if the CO alarm is working properly
and to mute the unit during alarm.
Test the unit
Press the test button and you should hear 4 short beeps with a
corresponding 3 LED flashes, in 5 seconds this cycle will repeat one more
time. No alarm signal will be generated at the panel.
Familiarize yourself and your family members with this alarm
pattern as this testing simulates an actual CO alarm condition
Silence the unit
While the CO alarm is sounding, pressing the test/reset button will silence
the alarm however the red LED will continue to flash. After 4 minutes, if
the CO concentration that caused the alarm still remains at dangerous
levels, the audible CO alarm will reactivate.
The WS4913 CO alarm is designed to require minimum maintenance,
however, we recommend the following to ensure your CO alarm
continues to function properly:
(a) Use a vacuum cleaner to clean the CO alarm cover once a month,
using the soft brush attachment, never use water, cleaners as they
may damage the unit.
(b) Press the Test/reset button to test its operating function once every
The red, green and yellow LED lights and built in sounder turn on and/or
off to indicate various situations. The CO Alarm provides the following
Warm Up Mode:
During the first 5 minutes after inserting the
battery, the orange LED will flash
every 10 seconds and the unit
will chirp every 60 seconds to indicate that the unit is in warm up
Power on mode:
(three) LEDs blink and the built in sounder
beeps for 0.5 second as soon as the battery is installed.
The green LED flashes once every 60 seconds, which
means the unit is receiving power and also indicates it is functioning
CO Alarm mode
When the unit senses the concentration of carbon
monoxide (CO) in the air around the device exceeds the 'alarm' threshold ,
the red LED light flashes rapidly and built in sounder activates loudly
repeating a sequence of 4 quick beeps followed by a 5 second pause.
ow battery warning mode
Every 1 (one) minute the yellow LED
flashes once and the built in sounder chirps once. This warning will
continue for up to 30 days, but the battery must be replaced as soon as
possible to ensure proper operation of the detector.
The built in sounder chirps once every 1 (one) minute
and the yellow LED is on continuously until the WS4913 is mounted on
the back plate bracket properly. If this trouble occurs ensure the device is
If every 1 (one) minute the built in sounder chirps and the yellow LED
times, an internal trouble has occurred and the CO
Alarm will need to be replaced. (See Trouble conditions on page 1).
If this trouble occurs contact your
to have the
When properly enrolled on a DSC control panel the control panel will also
provide indication of various conditions. Your control panel installer will
inform you of the indications the panel provides.
Never disassemble the CO Alarm; there are no user serviceable parts
inside the unit. You may only remove CO Alarm from back plate to
replace battery if not serviced by installer. When replacing the battery,
follow the instructions specified within the Installation Instructions,
This product uses a lithium battery, improper han-
dling may result in HEAT, EXPLOSION or FIRE causing personal
injury. DO NOT recharge batteries. Follow the battery manufacturer’s
safety instructions. Dispose of used batteries in accordance with the
regulations in your area.
Never paint the unit. Paint may prevent CO gas from entering the
This is a safety issue the CO alarm must not be removed .
The WS4913 Wireless Carbon Monoxide Alarm has been designed to
provide an alarm based on various exposure times at different levels of
carbon monoxide concentrations
as per UL 2034 standard:
This CO alarm WS4913 meets following mentioned response times:
70ppm, the unit must alarm within 60-240 minutes.
At 150ppm, the unit must alarm within 10-50 minutes.
the unit must alarm within 4-15 minutes.
Digital Security Controls, 95 Bridgeland Ave. Toronto,
Ontario, Canada, M6A 1Y7.
Name and address of firm to whom alarm is to be sent for servicing:
Digital Security Controls, 95 Bridgeland Ave. Toronto, Ontario, Canada,
Electrochemical carbon monoxide sensor
Height (including base)
provided by one 3V lithium battery Model Duracell Ultra
DL123AB. Battery life : 1 year under typical operating conditions.
85dB at 3m
PC9155-433, PC9155D-433 & PC9155G-433
4.4 ºC to 37.8 ºC
Low Battery Detection:
Low battery with a minimum 30 days remaining
Duracell Ultra DL123AB
The maximum altitude:
2000 meters above sea level.
WARNING AND LIMITATION
This product is intended for use in ordinary indoor
locations of family living units. It is not designed to measure compliance
with Occupational Safety and Health Administration (OSHA) commercial
or industrial standards.
Individuals with a medical problem may consider using warning devices which
provide audible and visual signals for carbon monoxide concentrations less
than 30 ppm.
This CO alarm is not suitable as a smoke or fire alarm /detector. This CO
alarm is not suitable to install in a hazardous location, as defined in the
National Electrical Code.
This CO alarm will not work without power. WS4913 series Carbon Monoxide
Alarm will not work if the battery power is disconnected or cut off for any
reason. Additionally, carbon monoxide must reach the CO alarm unit for the
proper performance of CO gas detection.
Carbon monoxide alarms may wear out because they contain electronic parts
that fail at any time. Test your CO alarm at least every week (see the section
"TEST AND SILENCE YOUR CO ALARM").
Digital Security Controls warrants that for a period of twelve months from
the date of purchase, the product shall be free of defects in materials and
workmanship under normal use and that in fulfillment of any breach of
such warranty, Digital Security Controls shall, at its option, repair or
replace the defective equipment upon return of the equipment to its repair
depot. This warranty applies only to defects in parts and workmanship
and not to damage incurred in shipping or handling, or damage due to
causes beyond the control of Digital Security Controls such as lightning,
excessive voltage, mechanical shock, water damage, or damage arising
out of abuse, alteration or improper application of the equipment.
The foregoing warranty shall apply only to the original buyer, and is and
shall be in lieu of any and all other warranties, whether expressed or
implied and of all other obligations or liabilities on the part of Digital
Security Controls. Digital Security Controls neither assumes responsibility
nor authorizes any other person purporting to act on its behalf to modify
or to change this warranty, nor to assume for it any other warranty or
liability concerning this product.
In no event shall Digital Security Controls be liable for any direct, indirect
or consequential damages, loss of anticipated profits, loss of time or any
other losses incurred by the buyer in connection with the purchase,
installation or operation or failure of this product.
Digital Security Controls recommends that the entire
system be completely tested on a regular basis. However, despite
and due to, but not limi
ted to, criminal tampering or
electrical disruption, it is possible for this product to fail to perform as
Changes or modifications not expressly
approved by Digital Security Controls could void the user‘s authority to
operate this equipment.
FCC Compliance Statement
Changes or modifications not expressly approved by
DSC could void your authority
to use this equipment.
This equipment generates and uses radio frequency energy and if not
installed and used properly, in strict accordance with the manufacturer‘s
instructions, may cause interference to radio and television reception. It
has been type tested and found to comply with the limits for Class B
device in accordance with the specifications in Subpart C of Part 15 of
FCC rules, which are designed to provide reasonable protection against
such interference in any residential installation. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause interference to television or radio reception, which
can be determined by turning the equipment off and on, the user
encouraged to try to correct the interference by one or more of the
Re-orient the receiving antenna.
Relocate the alarm control with respect to the receiver.
Move the alarm control away from the receiver.
Connect the alarm control into a different outlet so that alarm control
and receiver are on different circuits.
If necessary, the user should consult the dealer or an experienced
radio/television technician for additional suggestions. The user may find
the following booklet prepared by the FCC helpful “How to identify and
resolve Radio/Television Interference Problems”, this booklet is available
from the U.S. Government Printing Office, Washington, D.C, 20402,
Industry Canada Compliance Statement : This class B digital apparatus
meets all requirement of the Canadian interference-causing equipment
Cet appareil numérique de la Classe B respecte toutes les
exigences de règlement sur le matériel brouilleur du Canada.
IC RSS210 ; IC: 160A-WS4913
Canada technical specifications were met.
Manual part # MCD33109205 Rev. A
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da, and the language of the
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AND INJURY TO PROPERTY. WARNING
DSC recommends that the entire system be completely tested on a regular basis. However, despite frequent
testing, and due to, but not limited to, criminal tampering or electrical disruption, it is possible for this SOFTWARE PRODUCT
to fail to perform as expected.
CE CLASS 1.20