Ei Electronics Ei207 Series User manual

Ei207 / 208 Series
Carbon Monoxide Alarms
Instruction Manual
Read and retain carefully for as long as the product is being used. It contains vital
information on the operation and installation of your Alarm. The manual should be
regarded as part of the product.
If you are just installing the unit, the manual MUST be given to the householder. The
manual is to be given to any subsequent user.
Battery Powered

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Symbol Glossary
SymbolDescription
The symbols on this page are used in accordance with EN 62368-1, IEC 60417, ISO 7000
and other applicable standards. They are used to convey information on the safe and
effective use of our devices. These symbols may be used on the device itself, on its
packaging or in associated documentation.
WEEE symbol
Indicates that the device must be taken to a recycling point when it has
reached its end of life.
Crossed Paint Brush
This indicates that the device must not be painted.
UKCA mark
This indicates that this product conforms with the relevant standards for
products sold within the United Kingdom (UK). The UKCA marking is also
found on products sold outside the UK that are designed to be sold in the UK.
End of life
This indicates the date after which the device should be replaced.
CE mark
This indicates that this product conforms with the relevant EN standards for
products sold within the European Economic Area (EEA). The CE marking is
also found on products sold outside the EEA that are manufactured in, or
designed to be sold in, the EEA.
Mobius Loop
This indicates that the packaging of this product can be recycled.
The Green Dot
This is a European trademark that indicates that the manufacturer has
contributed financially to the recycling of packaging in Europe.

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Table of Contents
1. Introduction 3
1.1 What is Carbon monoxide? 3
1.2 Ei207/208 CO Alarm Overview 6
1.3 Technical Specification 8
2. Installation 9
2.1 where to Locate the CO Alarm 9
2.2 Mounting the Alarm 15
3. Operation 18
3.1 How does your CO Alarm work? 18
3.2 Testing your Alarm 21
3.3 Cleaning your Alarm 22
4. What to do when the alarm sounds 23
5. How to protect your family 24
6. Limitations of CO Alarms 26
7. Troubleshooting and indicator summary tables 28
8. Getting the Alarm Serviced 34
9. Guarantee 34

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1. Introduction
The Ei207/208 Carbon monoxide Alarms contain a proven electrochemical CO sensor to
detect the presence of toxic levels of Carbon Monoxide (CO).
1.1 What is Carbon Monoxide ?
Many people are killed each year, and many more suffer ill health from Carbon Monoxide
(CO) poisoning. CO is an invisible, odourless, tasteless and extremely toxic gas. It is produced
by appliances and vehicles burning fuels, such as coal, oil, natural/bottled gas, paraffin, wood,
petrol, diesel, charcoal etc. CO is absorbed by red blood cells in the lungs in preference to
oxygen - this results in rapid damage to the heart and brain from oxygen starvation.
High levels of CO in a house can be caused by:
• Incorrectly or poorly installed fuel-burning appliances.
• Blocked or cracked chimneys/flues.
• Blocked vents or draught-proofing which makes areas with fuel burning appliances or
fireplaces airtight.
• Engines of cars, lawnmowers etc. left running in confined spaces.
• Portable paraffin or gas heaters in badly ventilated rooms.
Symptoms of Carbon Monoxide Poisoning
Most people know that high levels of CO are harmful, however the period of exposure is
also important. Table A shows how exposure to different concentrations of CO generally
affects people.

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Table A
Concentration
of CO in
Air ppm
Inhalation Time (approx) and Symptoms Developed
35 The maximum allowable concentration for continuous exposure
in any 8 hour period according to OSHA *.
150 Slight headache after 1.5 hours.
200 Slight headache, fatigue, dizziness, nausea after 2-3 hours.
400 Frontal headaches within 1-2 hours, life threatening after 3 hours,
also maximum parts per million in flue gas (on an air free basis)
according to US Environmental Protection Agency.
800 Dizziness, nausea and convulsions within 45 minutes.
Unconsciousness within 2 hours. Death within 2-3 hours.
1,600 Headache, dizziness and nausea within 20 minutes. Death within
1 hour.
3,200 Headache, dizziness and nausea within 5-10 minutes. Death within 25-30
minutes.
6,400 Headache, dizziness and nausea within 1-2 minutes. Death within 10-15
minutes.
12,800 Death within 1-3 minutes.
ppm = parts per million
*OSHA Occupational Safety and Health Association

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1.2 Ei207/208 CO Alarm overview
Red LED
Alarm Indicator
Amber LED
Fault Indicator
Green LED
Power Indicator
Test / Hush Button
CO Entry Holes
Alarm Sounder

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Model
Ei207
Ei207 Series with Replaceable Batteries (2 x AAA)
Model Chart
Ei207D
No
No
RF
Capability
No
No
RF Module
Supplied
No
Yes
LCD
Display
Model
Ei208W
Ei208WRF
Yes
Yes
RF
Capability
No
Yes
RF Module
Supplied
No
Ei208
No No No
No
Ei208DW
Ei208DWRF
Yes
Yes No
Yes
Yes
Yes
LCD
Display
Ei208 Series with built-in Long Life Battery
The models listed below are designed for domestic premises, recreational vehicles and similar
premises including recreational craft in accordance with 50291-1:2018 & EN 50291-2:2019

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1.3 Technical Specification
Sensor Type Electrochemical
CO Sensitivity Meets EN 50291-1:2018 and EN 50291-2:2019.
CO Alarm operates as per Table B.
Product life 10 years
Power Supply Two Alkaline AAA type batteries (replaceable) – Ei207 models.
Powered for life lithium battery (non-replaceable) – Ei208 models.
Alarm Sound Level >85dB(A) at 3 meters.
Button Test Checks CO sensor, batteries, electronics and horn.
Hush Mode Duration Alarm: 4 minutes
Battery and Sensor Fault: 12 hours
End of Life: 24 hours
Visual indicators Green LED - Power
Red LED - Pre-alarm, Alarm, Alarm Hush and memory
Yellow LED - Fault
Operating and Storage
Temperature -10°C to 40°C*.
Humidity Range 15% to 95% R.H. (non-condensing).
LCD Display Displays CO level above 20ppm (in steps of 5ppm).
RF Interconnect RF Module required (see Model Chart on page 6).
CO Alarm Memory Indicates if CO Alarm was previously in alarm.
Dimensions (mm) 120 x 105 x 40.
Weight (grams) 185g (Ei207) 178g (Ei208).
*Temperature and Humidity conditions are for normal operation and storage. Units will function outside these ranges
as required by the specific Product Standards. However, extended exposure to conditions outside these ranges may
affect product life. For advice on prolonged operation outside these ranges consult the manufacturer.

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2. Installation
WARNING: The apparatus must be installed by a competent person.
2.1 Where to locate the CO Alarm?
As per EN 50292:2023, a Carbon Monoxide Alarm should be installed in every room
containing a fuel-burning appliance.
a) If a fuel-burning appliance is in a room that is part of the dwelling, the apparatus may
be interconnected to other apparatus or smoke alarms according to the requirements
of EN 50291-1:2018, 5.13, within the same dwelling, to ensure an appropriate early
warning for occupants:
— in rooms in which the occupant(s) spend considerable time whilst awake and from
which they may not be able to hear an alarm from apparatus in another part of the
premises, i.e. due to a complex and/ or large dwelling or closed doors between the
apparatus and other rooms;
— in every sleeping room.
b) If a dwelling is a bedsit (a single room serving as both sitting and bedroom), then the
apparatus should be positioned as far from the cooking appliances as possible but near
to where the person sleeps.
c) If a fuel-burning appliance is in a room which is not normally frequented (for example a
boiler room), the apparatus should be interconnected to e.g. smoke alarms or to ancillary
devices (siren, beacon) in other rooms and/ or circular spaces to ensure an appropriate
early warning is given for occupants elsewhere in the building. If CO is detected, it is
recommended that those interconnected devices operate with a sound pattern that is
different from i.e. a smoke or fire alarm.

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Where a fuel-burning appliance has an extended and/or concealed flue, an apparatus
should be installed in each room through which the flue passes.
Additionally, the installation of carbon monoxide alarms is recommended to prevent from
unnoticed spread of CO from the biofuels storage room to other parts of the building. In
this case the carbon monoxide Alarm should be installed outside the storage room, but in
the immediate vicinity – ideally near the access door.
Boiler rooms are often located in areas of a building that are normally not frequented very
often, and so are the fuel storage rooms. Consequently, an audible alarm of the apparatus
may not be heard in other parts of the building. For this reason, it is recommended to
connect the apparatus to other warning devices in the building and to attach at least a
visual signalling device at the entrance to this part of the building, which is activated by the
apparatus if it is in alarm condition. To ensure a reliable activation of this signalling device
a Type A apparatus (see EN 50291-1:2018, 5.9) should be used.

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2.1.a Where in a room?
The locations must comply with applicable building regulations
In a room WITH a fuel burning
appliance
- The CO Alarm should be at a horizontal
distance of between 1m and 3m from the
potential CO source.
- If there is a partition in the room, the CO
Alarm should be located on the same side
of the partition as the potential source.
- The CO Alarm should be mounted at
least 300mm from any wall, joist or
fixture.
- Ceiling Mounting
In rooms with sloped ceilings, the CO
Alarm should be located at the high side
of the room.
- Wall Mounting
If it is mounted on a wall, it should be
located at a height greater than the
height of any door or window and at least
150mm (max. 300mm) below the ceiling.
300mm
150mm
1 to 3 m
1 to 3 m
DEAD AIR
DON'T LOCATE
HERE
CO Alarm
Fig.1
300mm
CO Alarm
Fig.2

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CO Alarm
breathing
level
Fig.3
In a room WITHOUT a fuel burning
appliance and WITHOUT an exhaust
duct passing through.
- Wall mounting
Mount the Alarm close to breathing
height and at least 300mm from any
other wall or fixture.
2.1.b Where in recreational vehicles?
Recreational vehicles may have additional risks of carbon monoxide ingress through air
vents due to the nearby presence of other vehicles, engines, generators or barbecues,
however this does not change the basic guidance on location of the Alarm. Recreational
vehicles should be fitted with an Alarm in the same room as any combustion appliance(s),
located in accordance with section 2.1.a. lf the recreational vehicle has a single living space
which incorporates the sleeping accommodation, it can be considered to be equivalent to
a bedsit, and a single Alarm is sufficient. However, any sleeping accommodation which is
in a separate room from the combustion appliance(s) should also contain an Alarm, located
in accordance with 2.1.a.
It is not always possible to find an optimum location for an Alarm, for example, a small
caravan or boat may not have suitable walls or ceilings available. Nevertheless, when fitting

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an apparatus in such situations, the two most important considerations when selecting an
appropriate location are:
• not mounting the apparatus directly above a source of heat or steam; and
• mounting the apparatus at a distance of 1m - 3m from the nearest edge of the potential
source of CO.
2.1.c Unsuitable Locations
Do not place the CO Alarm in any of the following areas.
(1) In the immediate vicinity of a cooking appliance (keep it at least 1 metre horizontally
from it).
(2) Outside the building.
(3) In an enclosed space (e.g. in or below a cupboard).
(4) In a damp or humid area. If, however, there is a fuel burning appliance in e.g. the
bathroom, then an apparatus suitable for humid rooms should be installed1.
(5) Directly above a sink or cooker.
(6) Next to a door, window, air vent or anywhere that it would be affected by draughts.
(7) Next to an extractor fan.
(8) Over heat sources such as radiators or hot air vents.
(9) Where it would be obstructed, e.g. by curtains or furniture.
(10) In an area where the temperature could drop below -10°C or rise above 40°C.
(11) Where dirt or dust could block the sensor.
(12) Where it could be easily knocked or damaged, or where it could be accidentally turned
off or removed.

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(13) In a bathroom or other areas where the CO Alarm may be exposed to water splashes,
dripping or condensation (e.g. above an electric kettle).
(14) Near paint, thinners, solvent fumes or air fresheners.
1 The Ei208 range can be installed in a bathroom, but do not place the detector directly above a
sink, shower or bath where it will be subject to splashing water and a high level of condensation.
It Is advised to test you CO alarm at least once per month using the test button.
2.1.d Interfering Substances
CO Alarms have a cross sensitivity to other substances that can trigger an alarm.
A CO Alarm should not be exposed to excessive amounts of fumes from petrol, diesel,
solvents, greases, alcohols and organic cleaning fluids.
The Alarm may respond to brief exhaust gas emissions e.g. during initial start-up of an
appliance or engine.
Hydrogen acts as an interferent and may give rise to alarms. Hydrogen can arise from some
battery charging activities and also the curing of concrete under certain circumstances.
IMPORTANT: Do not use the CO Alarm on an intermittent basis, or as a portable detector
for the leakage of combustion products from fuel burning appliances or chimneys.

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2.2 Mounting the Alarm
WARNING: The installation of this CO Alarm is not a substitute for proper installation, use
and maintenance of fuel burning appliances including appropriate ventilation and exhaust
systems.
2.2.a Installation Procedure
1. Select a location complying with the advice in ‘Where to locate the CO Alarm’.
2. Remove the mounting plate from the packaging/Alarm.
3. Place the mounting plate on the ceiling/wall exactly where you want to mount the
Alarm. With a pencil, mark the location of the two screw holes.
4. Taking care to avoid any electrical wiring in the
ceiling, drill holes using a 5.0mm drill bit through
the centre of the marked locations. Push the
plastic screw anchors provided into the drilled
holes. Screw the mounting plate to the ceiling/
wall. If wall mounting the CO Alarm, the panel
pin may be used as an alternative to the screws,
provided it is suitable for the mounting surface.
5. Alternatively, if desired, the CO Alarm will also free stand on a flat surface with the
mounting plate attached.
6. If using the RadioLINK interconnection, ensure the RF module is fitted correctly into the
base of the Alarm. For further advice on the RadioLINK installation, read the manual of
the RadioLINK module.
wall panel pin
mounting pad
Alternative Mounting pin

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7. Carefully line up the Alarm on the base, gently press home and twist on – see figure 4.
(This connects the batteries). The red, yellow and green LEDs will immediately flash in
sequence to show they are working. In addition, the icons on the LCD display on the
Display models will briefly light up.
8. In standby mode, the Alarm’s green LED will flash once every minute to indicate it is
powered.
9. Press the Test button (after 15 seconds) to ensure that the Alarm sounds (see figure 5).
10.Install all the other Alarms similarly.
Fig.4
CARBON
MONOXIDE
ALARM
ALARM
FAULT
POWER
Red
LED
Amber
LED
Green
LED
Test
Button
Fig.5

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2.2.b How to Tamperproof the Alarm
The Alarm can be made resistant to unauthorised removal. Break off the small pillar on the
base as shown in figure 6a. To remove the Alarm from the ceiling it is now necessary to
use a small screwdriver (see figure 6b). To release the catch, push catch towards the ceiling
and then twist off the Alarm. If necessary it is possible to further secure or tamperproof the
Alarm by using a No.2 or No.4 (2 to 3mm diameter - not supplied) self tapping screw 6 to
8mm long to firmly lock the Alarm and its mounting plate together (see figure 7).
Fig.6a Fig.6b Fig.7

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3.1 How does your CO Alarm work?
When the CO Alarm detects levels of CO (above 43ppm), it flashes the red LED. If the CO
level persists, then the CO Alarm will sound a loud alarm to warn the occupants. Table B
shows how the CO Alarm reacts to different levels of CO gas and exposure time. At higher
levels of CO the CO Alarm will sound quicker. The rate of flashing of the red light indicates
the level of CO.
3. Operation
Table B: CO Alarm Response

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The standard Ei Electronics Carbon Monoxide alarm pattern is a repeating cycle of 3 sound
pulses followed by a pause to help distinguish it from the Fire alarm pattern which is a
continuous rapid pulsing sound.
WARNING: If your Carbon Monoxide Alarm sounds (even if you are unsure of the cause), it
has detected dangerous levels of carbon monoxide. Always evacuate the dwelling.
NEVER IGNORE THE ALARM !
Pre-Alarm
When the Alarm detects over 43 ppm CO, the red light flashes in accordance with
Table B. This helps locate CO leaks as the CO Alarm gives an indication straight away.
(Withoutthis feature theCOlevel would need tobeat 43 ppmCOfor typically 72minutesfor an
alarmsoundtobegiven).NotethePre-AlarmsignalmaybetriggeredbyCOcomingforexample,
fromcookingwith gas, from carenginesorfromnearby barbecues. This isusuallynotaconcern,
unless the pre-alarm signal persists until the Alarm sounds and the CO source is unknown.
The display models will display CO concentrations greater than 20ppm in accordance with
Table B.
NOTE: The CO Alarm may sound if cigarette smoke is blown into it, or aerosols are released
nearby.

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Alarm Memory
The Alarm memory records when the alarm has been triggered, warning the occupier that
CO gas has been detected even if no one is in the house at the time.
The memory feature has two operation modes:
- memory indication for 24 hour period after alarm.
- memory recall on demand
24 hour memory indicators: After alarm, the red LED will flash at different rates every
minute (approx) depending on the level of CO detected - see Table C.
Memory recall on demand: To review the memory status after initial 24 hours, press and
hold the test button, the red LED will flash in accordance to Table C. Display models will
show the peak level of CO measured.
Reset Memory: Hold down the test button until the red LED stops and the green LED starts
flashing. Cover the horn with a cloth to muffle the alarm during this time. Please note that
the memory will also be reset when the CO Alarm is switched off.
Table C: CO Alarm Memory Indicators
CO Gas Level
ppm > 43 ppm
2 flashes / min
ppm > 80 ppm
4 flashes / min
ppm > 150 ppm
8 flashes / min
Red LED
2 flashes / 8 secs
4 flashes / 8 secs
8 flashes / 8 secs
Display
0-24hrs
>24hrs
(while pressing
the Test button)
Time lapsed
after the Alarm
ppm > 43 ppm
ppm > 80 ppm
ppm > 150 ppm
Green LED
-
-
-
-
-
-
-
-
-
Maximum CO
level recorded
is displayed