SITERWELL ELECTRONICS CO.,LIMITED GS883-A User manual

0905
Combo Smoke/CO Alarm Instruction
Manual
Model No.: GS88 -A
Thank you for purchasing this Combination
Smoke/CO alarm GS883-A. This evice is a pro uct
that has been built using state-of-the-art technology.
This evice is battery operate an features a non-
replaceable, seale battery an smart silence
nuisance alarms.
This instruction manual contains important
information on starting operation an using the
evice. Store this instruction manual in a safe place
for future reference.
This instruction manual is a part of this evice –
bear this in min if you pass on this evice to
others.
Please take a few minutes to thoroughly rea the
instruction manual an familiarise yourself an your
family with its operation.
Table of Contents
1. What to do if the smoke alarm sounds
2. What to do if the CO alarm sounds
. Product important information
4. Installation instructions
5. Understanding your Combo Smoke/CO alarm
6. General maintenance
7. Carbon monoxide overview
8. Battery information
9. Product Specifications
10. Deactivation of alarm
11. Good safety habits - develop and practice a
plan of escape
12. Manufacturer and Customer service
information
1 . Warranty Information
14. Warranty card
1. What to do if the smoke alarm
sounds
Smoke alarm pattern is three long
beeps, repeating every 1.5 seconds.
The ALARM indicator(red) will flash
the same pattern.
The smoke alarm takes precedence when both
smoke and carbon monoxide are present.
1.1 What to do in case of fire
1. Do not panic; stay calm.
2. Leave the buil ing as quickly as possible. Touch
oors to feel if they are hot, o not open but use an
alternate exit that is not hot. Crawl along the floor
an o not stop to collect anything.
3. Meet at a pre-arrange meeting place outsi e the
buil ing.
4 . C a l l t h e f i r e e p a r t m e n t f r o m o u t s i e t h e
buil ing.
5. Do not go back insi e a burning buil ing. Wait
for the fire epartment to arrive.
NOTE: These guidelines will assist you in the
event of a fire, however, to reduce the chance that
fires will start, practice fire safety rules and
prevent hazardous situations.
1.2 Practice fire safety
If the smoke alarm soun s, an you have not pushe
the test button, it is warning of a angerous
situation, your imme iate response is necessary. To
prepare for such occurrences, evelop family escape
plans, iscuss them with all househol members, an
practice them regularly.
1. Expose everyone to the soun of a smoke alarm
evice an explain what the soun means.
2. Determine two exits from each room an an
escape route to the outsi e from each exit.
3. Teach all househol members to touch the oor
an use an alternate exit when the oor is hot,
1 / 14 GS88 -A Instruction Manual Rev. G
19
EN 14604:2005/AC:2008
EN 50291-1:2018
DOP:883-CPR-0002

instruct them not to open the oor if the oor is
hot.
4. Teach househol members to crawl along the
floor to stay below angerous smoke, fumes an
gases.
5. Determine a safe meeting place for all members
outsi e the buil ing.
2. What to do if the CO alarm sounds
Carbon monoxide(CO) alarm pattern
is four long beeps repeating every 5
seconds. The ALARM indicator(red)
will flash the same pattern.
WARNING! –Actuation of your CO alarm
indicates the presence of Carbon Monoxide (CO)
which can KILL YOU.
WARNING!–Action of this device indicates
the presence of dangerous levels of CO! CO can
be fatal!
If the alarm sounds:
1. Keep calm an open all oors an win ows to
increase the rate of ventilation. Stop using all fuel-
burning appliances an ensure, if possible, that
they are turne off, e.g. for gas appliances, isolate the
emergency control valve;
2. If the alarm continues, then evacuate the
premises. Leave the oors an win ows open, an
only re-enter the buil ing when the alarm has
stoppe . In multi- occupancy an multi-storey
premises, ensure that all the occupants are alerte
to the risk;
3. Get me ical help for anyone suffering the effects
of carbon monoxi e poisoning, see Table 7.1, an
a vise that carbon monoxi e inhalation is
suspecte ;
4. Telephone the appropriate appliance servicing
an /or maintenance agency or, when necessary, the
relevant fuel supplier on their emergency number
or the national Gas Emergency Service Provi er, if
appropriate, so that the source of carbon monoxi e
emissions can be i entifie an correcte . Unless
the reason for the alarm is obviously spurious,
o not use the fuel-burning appliances again, until
they have been checke an cleare for use by a
competent person accor ing to national
regulations.
If problems are identified during this inspection,
have the equipment serviced immediately. Note
any combustion equipment not inspected by the
technician and consult the manufacturer’s
instructions or contact the manufacturer directly
for more information about CO safety and this
equipment. Make sure that motor vehicles are not
or have not been operating in an attached garage
or adjacent to the residence.
Never restart the source of a CO problem until it
has been corrected.
Never ignore the sound of the CO alarm!
. Product important information
CAUTION! -This Combo Smoke/CO alarm
was designed to detect both smoke and carbon
monoxide from any source of combustion in a
residential environment. It is not designed for use
in recreational vehicle (RV) or boat.
CAUTION! -This Combo Smoke/CO alarm
was designed for indoor use only. Do not expose to
rain or moisture. Do not knock or drop the alarm.
Do not open or tamper with the alarm as this
could cause malfunction.
CAUTION! -This Combo Smoke/CO alarm
is designed to detect carbon monoxide gas from
ANY source of combustion. It is NOT designed to
detect any other gas.
CAUTION! -This Combo Smoke/CO alarm
will not protect against the risk of smoke or
2 / 14 GS88 -A Instruction Manual Rev. G

carbon monoxide poisoning when the battery has
drained.
CAUTION! -Installation of the alarm
should not be used as a substitute for proper
installation, use and maintenance of fuel burning
appliances including appropriate ventilation and
exhaust systems.
CAUTION! -This device should be installed
by a competent person.
CAUTION! -This Combo Smoke/CO alarm
MUST be installed on the supporting bracket,
otherwise the device won't work.
CAUTION! -This Combo Smoke/CO alarm
is not intended to alert hearing impaired
individuals.
WARNING! - Do NOT try to repair the
device, it has the risk of electric shock or
malfunction if the device is tampered with.
1. The TEST/SILENCE button accurately tests the
evice functions. Do not use any other test
metho . Test the evice weekly to ensure proper
operation.
2. If you're sure it isn't a real alarm warning, open
win ows or fan the air aroun the evice to silence
it.
3. Observe an follow all local an national
electrical an buil ing co es for installation.
4. This Combo Smoke/CO alarm is esigne to be
use insi e a single family only. In multifamily
buil ings, each in ivi ual living unit shoul have
its own smoke alarm evices. Do not install in
non-resi ential buil ings. The evice is not a
substitute for a complete alarm system.
5. Install a Combo Smoke/CO alarm in every room
an on every level of the home. Smoke may not
reach the smoke alarm for many reasons. For
example, if a fire starts in a remote part of the
home, on another level, in a chimney, wall, roof, or
on the other si e of a close oor, smoke may not
reach the evice in time to alert househol
members. This Combo Smoke/CO alarm will not
promptly etect a fire or CO anger except in the
area or room in which it is installe .
6. This Combo Smoke/CO alarm may not alert every
househol member every time. The alarm horn is
lou in or er to alert in ivi uals to a potential
anger. However, there may be some circumstances
where a househol member may not hear the alarm
(i.e. out oor or in oor noise, soun sleepers, rug
or alcohol usage, the har of hearing, etc.). If you
suspect that this evice may not alert a househol
member, you shoul install an maintain other
specialty smoke alarm or/an CO alarm evices.
Househol member must hear the alarm’s warning
soun an quickly respon to it to re uce the risk
of amage, injury, or eath that may result from
fire, If a househol member is har of hearing,
install other special smoke alarm or/an CO alarm
with lights or vibrating evices to alert occupants.
7. This Combo Smoke/CO alarm can only soun
their alarms when they etect smoke or etect
combustion particles or angerous level of CO in
the air. They o not sense heat, flame, or other
gas. The evice is esigne to give au ible warning
of a eveloping fire. However, many fires are fast -
burning, explosive, or intentional, an others are
cause by carelessness or safety hazar s. In this
scenario, smoke may not reach the unit to set the
alarm off QUICKLY ENOUGH to ensure a safe
escape.
8. This Combo Smoke/CO alarm have limitations.
The evice is not foolproof an is not warrante to
protect lives or property from fire. Smoke alarm
or/an CO alarm are not a substitute for insurance.
Homeowners an renters shoul insure their lives
an property. In a ition, it is possible for the
evice to fail at any time. For this reason, you
must test the evice weekly an replace unit every
10 years.
/ 14 GS88 -A Instruction Manual Rev. G

4. Installation instructions
WARNING! - To prevent injury, this
device must be securely attached to the
ceiling/wall in accordance with the installation
instructions.
4.1 Recommended location for alarms
The following suggestions are inten e to help you
with the placement an installation of your Combo
Smoke/CO alarm.
● Smoke or smo ke/CO alarms for require prote ctio n
○ Smoke or smo ke/CO alarms for a itional protection
Smoke alarm with silence control for a itional △
protection
1. Install in a be room or hallway locate close to
the sleeping area. Take special care to verify the
alarm can be hear in sleeping areas. If more than
one sleeping area exists, locate a itional alarms in
each sleeping area.
2. Locate a evice in every be room.
3. It is recommen e that a Combo Smoke/CO alarm
be installe on each level of a multilevel home.
4. Locate a evice in every room where electrical
appliances are operate (i.e. portable heaters or
humi ifiers).
5 . L o c a t e 1 0 f e e t a w a y f r o m a l l f u e l b u r n i n g
appliances.
6. Placing at eye level allows for optimum
monitoring of the re an green in icator lights.
7. Smoke, heat, an combustion pro ucts rise to the
ceiling an sprea horizontally. Mounting the
smoke alarm on the ceiling in the centre of the
room places it closest to all points in the room.
Ceiling mounting is preferre in or inary
resi ential construction.
8. The evice shoul be at least 6 feet (1.8 metres)
above the floor level.
9. When mounting a evice on the ceiling, locate it
at a minimum of 4 inch (10 cm) from the si e wall.
10. When mounting the evice on the wall, use an
insi e wall with top e ge the alarm at a minimum
of 4 inch (10cm) an maximum of 12 inch
(30.5cm) below the ceiling.
11. Put the evice at both en s of a be room hallway
or large room if the hallway or room is more than
30 feet (9.1 m) long.
12. Install the evice on slope , peake or cathe ral
ceilings at or within 3 feet (0.9m) of the highest
point (measure horizontally).
4 / 14 GS88 -A Instruction Manual Rev. G
Single floor plan
Multiple floor plan

4.2 Locations to avoid
For ensure the Combo Smoke/CO Alarm work
properly an provi e etection performance, o not
install the evice in the following places:
1. Near appliances or areas where normal
combustion regularly occurs (kitchens, near
furnaces, hot water heaters). Install at least 10 feet
away from these areas. Use specialize smoke alarm
evice with unwante alarm control for these
areas.
2. In areas with high humi ity, like bathrooms or
areas near ishwashers or washing machines or
irectly above a sink. Install at least 10 feet away
from these areas.
3. Avoi spraying aerosols near the evice.
4. Next to a oor or win ow, an extractor fan, air
returns or heating an cooling supply vents. Install
at least 3 feet away from these areas. The air coul
blow smoke away from the evice, interrupting its
alarm.
5. In rooms where temperatures may fall below
0℃ or rise above 40℃, or in humi ity higher than
93%. These con itions will re uce battery life or
cause a fault alarm.
6. In extremely usty, irty, or insect-infeste areas,
particles may interfere with the evice operation.
7. In the garage. Pro ucts of combustion are present
when you start your automobile.
8. In an enclose space (for example in a cupboar
or behin a curtain).
9. Where it can be obstructe (for example by
furniture).
10. Less than 4 inch (10cm) from the peak of an “A”
frame type ceiling.
11. Near fluorescent lights. Electronic “noise” may
cause nuisance alarms.
12. Place out of the reach of chil ren. Un er no
circumstances shoul chil ren be allowe to han le
the evice.
4. Installation instructions
CAUTION! -This device should be installed
by a competent person.
CAUTION! -This Combo Smoke/CO alarm
MUST be installed on the matching bracket,
otherwise the device won't work.
When choosing your installation locations, make
sure you can hear the alarm from all sleeping areas.
If you install only one evice in your home, install
the evice near be rooms, not in the basement or
furnace room.
1. Drilling two ф5.0mm holes in the ceiling or wall,
the istance between two holes centre is
70mm(2.76inch), then inserting two plastic plugs
provi e into the holes.
2. Attach the bracket to the plastic plugs an fix
tightly the screws into the plastic plugs.
Do NOT over-tighten screws.
3. Install an rotate the alarm bo y on the bracket.
4. Test the evice by using the TEST/SILENCE
button. Ensure the evice soun is alarm pattern.
5 / 14 GS88 -A Instruction Manual Rev. G

As you install the device, it may sound for several
minutes, then stop and enter in normal operation
mode. If it always sounds, please call our agent.
4.4 Un-installation instructions
Rotate clockwise for installation
Rotate counter-clockwise for un-installation
CAUTION! -This Combo Smoke/CO alarm
MUST be installed on the matching bracket,
otherwise the device won't work.
5. Understanding your Combo
Smoke/CO alarm
5. 1 Product overview
1. POWER indicator (green)
The green in icator is use to in icate power status
of the evice. The green in icator will flash every
40 secon s.
2. FAULT indicator (yellow)
The yellow in icator is use to in icate
malfunctions or low battery warning status of the
evice.
. ALARM indicator (red)
The re in icator is use to in icate alarm status of
the smoke alarm or CO alarm.
4. TEST/SILENCE button
The TEST/SILENCE button is use to test the evice
an to silence the unit uring a smoke alarm. Press
an hol to enable TEST function, Or press to
enable SILENCE function.
5. Sounder
The soun er is use to sen out smoke alarm, CO
alarm warning an abnormal warning information.
6. Power on switch
The power on switch is use to power on the
evice .
The evice MUST be installe on the matching
bracket, otherwise the evice won't work.
7. Deactivation switch
The eactivation switch is use to scrap the evice.
More information please refer to "10. Deactivation
of the evice ".
5.2 Operation and testing
1. Start-up
After connecting the battery, three color in icators
6 / 14 GS88 -A Instruction Manual Rev. G
Ceiling or Wall
2 x ф5.0mm
Alarm bo y
un-installation installation
Tricolor in icator
Soun er
YELLOW=FAULT
GREEN=POWER
RED=ALARM
indicator
TEST/SILENCE button
Power on switch
Deactivation switch
button

(green /yellow/re ) will light up briefly an the
evice confirms start-up with a beep.
After power on, 40 secon s before the POWER
in icator (green) flash every 2 secon s. This is pre-
heate state, 40 secon s later the POWER in icator
(green) flashing every 40 secon s in icates the
evice is functioning properly.
2. Normal operation
The POWER in icator (green) flashing every 40
secon s.
. Fault warning
If the evice chirps twice every 40 secon s, with
FAULT in icator (yellow) will be flashing. It
in icates the evice is in a malfunctioning
con ition. That means your evice has no etecting
feature an no response to smoke an CO.
CAUTION! -When Fault warning occurs,
replace the device immediately. Please contact us
to more service.
CAUTION! -When Fault warning occurs,
please refer to "10. Deactivation of alarm" to
dispose the device.
4. Low battery voltage warning
If the evice chirps once every 40 secon s, with
FAULT in icator (yellow) will be flashing. It
in icates the battery is low.
NOTE: When the low battery voltage warning
occurs the device is capable of producing a smoke
alarm signal or CO alarm signal for at least 4 min
or 0 days of low battery voltage warning signal
operation.
NOTE: You need to replace the device as possible
as soon when the device enters this status.
NOTE: The device will not protect against the risk
of smoke and carbon monoxide poisoning when
the battery has drained.
NOTE: Refer to “10. Deactivation of the device”
to dispose the device.
5. Low battery voltage warning silence
When the evice is un er the low battery warning,
pressing the TEST/SILENCE button, it will come
into a low battery voltage warning silence status for
about 9 hours, an FAULT in icator (yellow)
continue to flash.
NOTE: The silence feature of low battery voltage
warning is temporary action to cancel warning
sound effect, you need to replace the device as
possible as soon.
6. Smoke alarm
When the evice etects a angerous level of
smoke, the evice will emit a smoke alarm pattern.
The smoke alarm signal pattern is 3 long beeps
followe by 1.5 secon s of silence. This cycle
repeats as long as a angerous smoke con ition
exists. The ALARM in icator(re ) will flash the
same pattern.
This signal will repeate until issipation of smoke
or the alarm signal is manually silence .
CAUTION! -Refer to “1. What to do if the
smoke alarm sounds” when you hear the sounds
of the smoke alarm warning.
DANGER! -If the smoke alarm sounds, and
it is not being tested, it means the unit is sensing
smoke, THE SOUND OF THE ALARM
REQUIRES YOUR IMMEDIATE ATTENTION
AND ACTION.
7. Smoke alarm silence
During the evice un er smoke alarm mo e, push the
TEST/SILENCE button, it will pause the evice alarm
soun for about 10 minutes. The ALARM in icator
(re ) will keep flashing in smoke alarm mo e, it
in icates the evice is running into the smoke alarm
silence mo e. This Combo Smoke/CO alarm is
esigne to minimise nuisance alarms. Combustion
particles from cooking may set off the alarm if the
alarm is locate close to the cooking area. Large
quantities of combustible particles are generate
from spills or when grilling/frying. Using the fan on
a range hoo that vents to outsi e (non-recirculating
type) will also help remove these combustible
particles from the kitchen. The smoke alarm silence
7 / 14 GS88 -A Instruction Manual Rev. G

(TEST/SILENCE button) is extremely useful in a
kitchen area or other areas prone to nuisance
alarms. The silence feature is to be use only when a
known alarm con ition, such as smoke from cooking
activates the alarm. The evice is esensitize by
pressing the TEST/SILENCE button on the smoke
alarm cover, the evice will silence to in icate that
the evice is in a temporarily esensitize
con ition.
The Combo Smoke/CO alarm will automatically
reset after approx. 10 minutes, if after this perio ,
particles of combustion are still present, the alarm
will soun again.
T h e s m o k e a l a r m s i l e n c e ( s m o k e a l a r m s i l e n c e
mo e) c a n be rep e a te l y use unti l t h e a i r h as been
cleare of the con ition causing the alarm.
CAUTION! -Before using the smoke alarm
silence (silence), identify the source of the smoke
and be certain a safe condition exists.
8. CO alarm
When the evice etects a angerous level of CO,
the evice will emit a lou alarm pattern. The alarm
signal pattern is 4 long beeps followe by 5 secon s
of silence. This cycle repeats as long as a angerous
CO con ition exists. The ALARM in icator (re )
will flash the same pattern. This signal will repeat
until issipation of CO.
CO alarm sensitivity Setting:
Conforms to EN 50291-1:2018
30PPM Without alarm before 120 minutes
50PPM Between 60 to 90 minutes
100PPM Between 10 to 40 minutes
300PPM Less than 3 minutes
NOTE: The smoke alarm takes precedence when
both
smoke and carbon monoxide are present.
CAUTION! -Refer to “2. What to do if the
CO alarm sounds” when you hear the sounds of
the CO alarm warning.
DANGER! -If the CO alarm sounds, and it
is not being tested, it means the unit is sensing a
dangerous level of CO, THE SOUND OF THE
ALARM REQUIRES YOUR IMMEDIATE
ATTENTION AND ACTION.
9. Human alarm sounds
If the evice enters into the status of smoke alarm or
C O a l a r m , t h e e v i c e w i l l s t a r t i n a l o w e r a l a r m
volume (<85 B) for aroun 10 secon s, then emits a
normal alarm volume (≥85 B). This avoi s startling
people.
10. Test the device
To test the evice, pressing TEST/SILENCE button,
you shoul hear alarm soun patterns an with a
correspon ing ALARM in icator (re ) flashes. The
alarm soun patterns will stop after releasing TEST/
SILENCE button.
The test alarm soun pattern inclu es: 3 long beeps,
1.5 secon s pause, 4 long beeps, 5 secon s pause,
repeat this pattern until releasing TEST/SILENCE
button.
NOTE: After the TEST/SILENCE button is
enabled, the alarm sounds and the red alarm light
flashes. This does not indicate that CO is present.
NOTE: Test the unit weekly! If at any time your
unit does not perform as described, replace it
immediately.
NOTE: The function of human alarm sounds will
enable for button test. Please press and hold test
button more than 10 second, the device will emit a
normal alarm volume (≥85dB).
WARNING! -Do NOT use an open flame to
test your alarm, it could damage the alarm or
ignite combustible materials and start a
structural fire.
WARNING! -Due to the loudness (85
decibels) of the alarm, Always stand an arms-
length away from the unit when testing.
11. End of life warning
If the pro uct continues to work for 10 years, the
evice will chirp 3 times every 40 secon s, with a
FAULT in icator (yellow) flash, it in icates this
Combo alarm is in en of life. That means your
evice has no etecting feature an no response to
smoke an CO.
8 / 14 GS88 -A Instruction Manual Rev. G

NOTE: You need to replace the device as soon as
possible when the device enters this status.
NOTE: Refer to “10. Deactivation of the device”
to dispose the device.
5. Troubleshooting
CAUTION! -Do not attempt to repair the
device. It will affect your warranty.
If the evice is not operating properly, an is still
un er warranty, return it to the place of purchase.
Pack it in a well-pa e carton, an ship to the place
of purchase.
If the alarm is no longer un er warranty, have a
license electrician replace it imme iately with a
comparable alarm.
Table 5. Troubleshooting guide:
Problem Metho of isposal
The evice oes
not soun when
TEST/SILENCE
is presse .
1. Ensure evice is powere
off.
Fit the evice on the bracket
an turn it clockwise, until
matching well on the bracket.
2. The evice is un er "Smoke
alarm silence" or "Low battery
voltage warning silence" or
"Fault warning" mo e.
Please ensure the evice is
un er "Normal operation" mo e
then test the evice.
3. Clean the evice. Please refer
to "6. General maintenance".
4. If there are still failures
uring warranty, you can return
it to your retailer.
5. If the unit is out of warranty,
please replace with another new
evice.
The evice chirps
once with FAULT
in icator (yellow)
flashing once
every 40 secon s.
MALFUNCTION SIGNAL
Clean this evice. Please refer to
"6. General maintenance ".
1. If the evice is un er
warranty, please return it to
your retailer for replacement.
2. If the evice is out of
warranty, please replace with
another new evice.
The evice chirps
twice with FAULT
in icator (yellow)
flashing twice
every 40 secon s.
LOW BATTERY VOLTAGE
SIGNAL
T he b a t t e ry i s un er l o w b a tte r y
status, please replace the evice.
The evice soun s
unwante alarms
when resi ents are
cooking, taking
showers, etc.
1. Press TEST/SILENCE button
to pause alarm.
2. Clean the smoke aroun the
evice.
6. General maintenance
To keep your Combo Smoke/CO alarm in goo
working or er, please follow these simple steps:
1 . V e r i f y t h e u n i t ' s a l a r m s o u n a n i n i c a t o r s
o p e r a t i o n b y p r e s s i n g t h e T E S T / S I L E N C E b u t t o n
once a week.
2. Remove the unit from the ceiling an clean the
alarm cover an vents with a soft brush attachment
once a month to remove ust an irt.
3. Never use etergents or other solvents to clean
the unit.
4. Avoi spraying air fresheners, hair spray, or other
aerosols near the evice.
5. Do not paint the evice. Paint will seal the vents
an interfere with the sensor's ability to etect CO.
Never attempt to isassemble the unit or clean
insi e. This action will voi your warranty.
6. As soon as possible, place the Combo Smoke/CO
alarm back in its proper location to assure
continuous protection from fire an carbon
monoxi e poisoning.
7. When househol cleaning supplies or similar
contaminants are use , the area shoul be
ventilate .
WARNING! -The following substances can
affect the sensor and may cause false actions:
methane, propane, isobutene, isopropanol,
ethylene, benzene, toluene, ethyl acetate,
hydrogen sulfide, sulfur dioxides, alcohol based
products, paints, thinner, solvents, adhesives, hair
sprays, after shaves, perfumes and some cleaning
agents.
WARNING! -Your Combo Smoke/CO alarm
9 / 14 GS88 -A Instruction Manual Rev. G

will not be operational and will not monitor for
smoke and CO levels without battery.
WARNING! -This apparatus is designed to
protect individuals from the acute effects of
carbon monoxide exposure. It may not however,
prevent the chronic effects of carbon monoxide
exposure and will not fully safeguard individuals
at special risk or with specific medical
conditions. If in doubt consult a medical
practitioner.
7. Carbon monoxide (CO) overview
7.1 Toxic effects
Carbon monoxi e (CO) is a colourless, o ourless,
non-irritating gas classifie as a chemical
asphyxiant an whose toxic action is a irect result
of the hypoxia pro uce by a given exposure.
CO is rapi ly absorbe through the lungs, iffuses
across the alveolar capillary membrane an is
reversibly boun with haemoglobin as
carboxyhaemoglobin (COHb), however, a minute
amount is present in the plasma. The affinity of
haemoglobin for CO is over 200 times its affinity
for oxygen. This re uces the oxygen carrying
capacity of the bloo , an has an effect on the
issociation of oxyhaemoglobin, which further
re uces the oxygen supply to the tissues. CO is
chemically unchange in the bo y, an is eliminate
in expire air. The elimination is etermine by the
same factors that applie uring absorption. The
half-life while breathing room air is 2 h - 6,5 h
epen ing on the initial COHb level.
If the CO level in the inhale air is constant, the
level of COHb in the bloo will approach an
equilibrium (saturation) state after several hours.
However, the rate at which the equilibrium is
reache epen s on many factors, e.g. lung
ventilation rate (physical activity) an alveolar
capillary transfer, car iac parameters, bloo
haemoglobin concentration, barometric pressure,
oxygen an carbon ioxi e concentration in the
inhale air, but the two most important factors in
etermining the COHb level are the CO
concentration an the uration of exposure.
The effects of ifferent saturation bloo COHb
levels on healthy a ults are shown in Table 7.1.
Table 7.1 – H eal th effects of COHb blood leve ls on
healthy adult s
% C O H b E ff e ct s
0.3 – 0.7 Normal range in non-smok ers ue t o
en ogenous CO p ro uct ion
0.7 – 2.9 No proven physiological cha nges
2.9 – 4.5 Car io-vascular changes in car iac patients
4 – 6 Usual values observe i n smokers, impairment
in psychomotor tests
7 – 10 Car io-vascular changes in non-ca r iac patients
(increase car iac output an coronary bloo
flow)
10 – 20 Slight hea ache, weakness, potent ial bur en on
foetus
20 – 30 Severe hea ache , nausea, impairment in l imb
movements
30 – 40 Severe hea ache , irritability, confusion,
impairment in visual acuity, nausea, musc ular
weakness, izziness
40 – 50 Convulsions an unconsciousness
60 – 70 Coma, collapse, eath
Source: U.S. Environmental Protection Agency 1984
The relationship between the CO concentration an
the uration of exposure can be calculate for a
given %COHb, by parameterising the above factors.
Figure 7.1 shows examples for a person un ertaking
light/mo erate exercise.
Fig ure 7. 1–R elat ions hip bet ween CO conc entr atio n a nd
ex p osu re tim e fo r var i ous %COHb ( lig h t/moder a te exerci se)
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7.2 Chronic effects on high risk groups
In ivi uals with coronary artery isease expose to
low levels of CO show re uce ability to exercise
an the time of onset of exercise-in uce angina
pectoris in such patients expose to low levels of CO
is re uce .
Carbon monoxi e rea ily crosses the placental
barrier an may en anger the normal evelopment of
the foetus.
A number of high-risk groups are particularly
sensitive to the effects of CO because of various
organ impairments or specific changes, mainly:
a) those whose oxygen carrying capacity is
ecrease ue to anaemia or other haemoglobin
isor ers;
b) those with increase oxygen nee s such as those
encountere in fever, hyperthyroi ism or pregnancy;
c) those with systemic hypoxia ue to respiratory
insufficiency;
) those with heart isease an any vascular
insufficiency.
WHO gui ance states that in or er to protect non-
smoking, mi le-age an el erly population groups
with ocumente or latent coronary artery isease
from acute ischaemic heart attacks, an to protect
the foetuses of non-smoking pregnant women from
untowar hypoxic effects, a COHb level of 2.5%
shoul not be excee e . The following WHO
gui eline values an perio s of time-weighte
average exposures have been etermine in such a
way that the COHb level of 2.5% is not excee e ,
even when a normal subject engages in light or
mo erate exercise:
• 100 mg/m³ (90 ppm) for 15 min;
• 60 mg/m³ (50 ppm) for 30 min;
• 30 mg/m³ (25 ppm) for 1 h;
• 10 mg/m³ (10 ppm) for 8 h.
7. Normal COHb levels
Un er normal con itions, humans typically have low
levels of COHb of between 0.3% an 0.7% present
within the bo y. These levels are consi ere neither
beneficial nor harmful.
7.4 Tobacco smoking
Tobacco smokers are expose to significant
concentrations of CO. In cigarette smokers, the
COHb concentration varies between 5%-9%, while
heavy cigar smokers may excee 10%.
WARNING!-Exposure to high levels of
carbon monoxide can be fatal or cause permanent
damage and disabilities.
WARNING!- The device may not prevent
the chronic effects of carbon monoxide exposure
and that the device will not fully safeguard
individuals at special risk.
8. Battery information
8.1 Battery type
This evice is powere by a seale -in Lithium-ion
battery system. The battery type is CR17450.
Once activate , the battery will supply power to the
alarm for 10 years un er normal operation
con itions.
NOTE: No battery installation or replacement is
necessary for the life of the device.
NOTE: Constant exposure to high or low humidity
may reduce battery life.
8.2 Battery activation
This evice is equippe with a feature that
automatically activates the alarm when the alarm is
attache to the mounting plate for the first time.
NOTE: This device MUST be installed on the
matching bracket, otherwise the device won't
work.
8. Battery deactivation
This evice is equippe with low battery monitor
circuit which will cause the alarm to pro uce chirps
once an blink the FAULT in icator (yellow) every
40 secon s. you must to replace the evice within 7
ays of the first occurrence of the "Low battery
warning" to provi e continuous alarm protection..
The evice must be eactivate prior to isposing,
please see "10. Deactivation of the device ".
8.4 Battery disposal
WARNING!-Fire, explosion an severe burn
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hazar . Do not recharge, crush isassemble, heat
above 100℃, incinerate or expose contents to water.
1. Not to ispose of battery (or the evice) as
unsorte municipal waste but collect it separately.
2. Dispose of in accor ance with all applicable
fe eral, state an local regulations.
9. Product specifications
Model: GS883-A
Product standards: EN 14604:2005/AC:2008
EN 50291-1:2018
Type of apparatus: Type B - to provi e a visual an
au ible alarm only
Power Supply: 3V (CR17450) (non-replaceable,
seale -in battery up to 10 years lifetime)
Sensor of Smoke: photoelectric reflection
Smoke Alarm Sensitivity: 0.096~0.146 B/m
Smoke alarm silence: about 10 minutes
Sensor of CO: electrochemical
CO alarm sensitivity Setting:
Conforms to EN 50291-1:2018
30PPM Without alarm before 120 minutes
50PPM Between 60 to 90 minutes
100PPM Between 10 to 40 minutes
300PPM Less than 3 minutes
Product life: 10 years after manufacture
Standby Current: <20µA (average)
Alarm Current: <25mA (average)
Operation Ambient Condition: 0~+40℃,
30~93%RH non-con ensing
Storage/Transport Ambient Condition: -
20~+50℃, 10~95% RH non-con ensing
Alarm sound : ≥85 B at 10ft @3.0±0.5kHz
Low Battery warning silence: about 9 hours
Installation Location: ceiling or wall
Detection range: Max. 40 m2 within a room.
Size: about Φ134*40mm
Weight: 185±10g (net)
NOTE: This Combo Smoke/CO alarm is designed
to detect carbon monoxide gas from any source of
combustion. It is not designed to detect any other
gas.
10. Deactivation of the device
WARNING!- Deactivation of the device is
permanent. Once the device has been deactivated,
it cannot be reactivated!
WARNING!- Once deactivated, the device
will no longer detect smoke and CO.
WARNING!- Once the device is deactivated
the battery will be depleted and the alarm will no
longer function.
WARNING!- Once the device has been
deactivated, it cannot be re-mounted.
CAUTION! - It only takes up to 96 hours
for the battery to be fully discharged.
10.1 For un-installation remove the evice from the
bracket on the ceiling.
10.2 Break through the label with a screw river to
remove pin.
10.3 Insert the pin into the hole through label.
Remove pin Pin Insert pin
The WEEE symbol means that this product
and battery must be disposed separately
from other household waste.
When product reaches its end of life, take them to
a designated waste collection point in your area to
guarantee a safe disposal or recycling. Protect the
environment, human health and natural
resources!
11. Good safety habits - develop
and practice a plan of
escape .
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Prepare an practice a home escape plan twice a
year, inclu ing rills at night. Know of two ways
out of every room ( oor & win ow) an i entify a
meeting place outsi e the home where everyone will
gather once they have exite the resi ence. When
two people have reache the meeting place, one
shoul leave to call the fire epartment's telephone
number ( ______________ ) while the secon person
stays to account for a itional family members.
Establish a rule that once you're out, you never
re-enter under any circumstance!
■ Make a floor plan in icating all oors an
win ows an least two escape routes from each
room. Secon story win ows may nee a rope or
chain la er.
■ Have a family meeting an iscuss your escape
plan, showing everyone what to o in case of fire
an where to meet after they leave the house.
■ Ensure that small chil ren hear the alarm an
wake when it soun s. They must wake up in or er to
execute the escape plan. Practice allows all
occupants to test your plan before an emergency.
You may not be able to reach your chil ren. It is
important they know what to o.
■ Familiarise everyone with the soun of the smoke/
CO alarm an train them to leave your home when
they hear it.
■ Current stu ies have shown smoke/CO alarms may
not awaken all sleeping in ivi uals, an that it is the
responsibility of in ivi uals in the househol that
are capable of assisting others to provi e assistance
to those who may not be awakene by the alarm
soun , or to those who may be incapable of safely
evacuating the area unassiste .
■ Install an maintain fire extinguishers on every
level of the home an in the kitchen, basement an
garage. Know how to use a fire extinguisher prior to
an emergency.
12. Manufacturer and customer
service information:
12.1 Manufacturer:
SITERWELL ELECTRONICS CO., LIMITED
ADDRESS: No.666 Qingfeng Road, Jiangbei
District, Ningbo, Zhejiang Province, China
TEL: [phone]
FAX: [phone]
E-MAIL: [e-mail]
12.2 Customer service:
SITERWELL ELECTRONICS CO., LIMITED
ADDRESS: No.666 Qingfeng Road, Jiangbei
District, Ningbo, Zhejiang Province, China
TEL: [phone]
FAX: [phone]
E-MAIL: [e-mail]
1 . Warranty information
THREE YEARS LIMITED WARRANTY
Dear customer,
O u r p r o u c t s a r e s u b j e c t t o s t r i c t q u a l i t y
c o n t r o l s . H o w e v e r , i f t h i s e v i c e s h o u l
u n e x p e c t e l y n o t f u n c t i o n p e r f e c t l y , p l e a s e c o n t a c t
t h e c u s t o m e r s e r v i c e s a r e s s g i v e n o n w a r r a n t y
service information. This is the only way for you to
b e a b l e t o r e t u r n y o u r e v i c e o r h a v e i t p i c k e u p
free.
The warranty period is 6 months and begins on
the day of purchase.
Please always keep your till receipt as proof of
purchase. Warranty claims can only be ma e for
possible efects cause by material an pro uction
faults.
During the warranty perio , efective evices
can be sent to the service a ress given overleaf for
you (postage pai ). You will then receive a new or
repaire evice back free. After the warranty perio
has expire you still have the possibility of sen ing
the efective evice for repair to the a ress given
overleaf. Repairs carrie out after the warranty
perio must be pai for.
In the event of misuse or improper treatment,
use of force or intervention not carrie out by our
authorize service branches, the warranty is no
longer vali . This warranty oes not restrict your
legal rights.
NOTE: In the event of a warranty claim, please
return the till receipt and completed warranty
card with fault description together with the
1 / 14 GS88 -A Instruction Manual Rev. G

defective device.
NOTE: The warranty does not cover the batteries
supplied.
14. Warranty card:
Last Name:
First Name:
Phone:
A ress:
City:
Country:
Zip Co e:
Fault escription:
Date of purchase:
Signature:
14 / 14 GS88 -A Instruction Manual Rev. G