Ei Electronics Ei261ENRC, Ei261DENRC User Manual
Model Ei261ENRC
Model Ei261DENRC
WITH DIGITAL DISPLAY
Read and retain carefully for as long as the product is being used. Contains vital information on the
operation and installation. This leaflet should be regarded as part of the product.
If you are just installing the unit, this leaflet must be given to the householder. This leaflet is to be
given to any subsequent user.
MAINS POWERED
CARBON MONOXIDE ALARMS
WITH RECHARGEABLE LITHIUM CELL BACK-UP
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IMPORTANT INFORMATION
CARBON MONOXIDE - THE SILENT KILLER
ALARM POSITIONING
INSTALLATION
TESTING
HOW TO DISTINGUISH BETWEEN CO ALARM & SMOKE ALARM WARNINGS
MAINTENANCE
LIMITATIONS OF CO ALARMS
HOW TO PROTECT YOUR FAMILY
GETTING YOUR CO ALARM SERVICED
FIVE YEAR GUARANTEE
TECHNICAL SPECIFICATIONS
TROUBLESHOOTING
ACCESSORIES
Page
CONTENTS
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1. IMPORTANT INFORMATION
WARNING: The Alarm should be permanently wired to the mains by a qualified electrician in accordance
with IEE wiring regulations (BS7671).
Install a Carbon Monoxide (CO) Alarm in every room that contains a fuel burning appliance,
particularly rooms where people spend a lot of time e.g. bedrooms, kitchens and sitting rooms.
In rooms with an appliance, install (preferably) on the ceiling (300mm from walls and between 1m
to 3m horizontally from appliance). In rooms remote from the appliance install at breathing level,
where the light indicators can be seen.
Regularly check that the green power light is on, so that rechargeable back-up cells will remain fully
charged. Important: The CO Alarm will not work if the mains supply is off and the rechargeable
cells are depleted.
Test the unit weekly by pressing and holding the Test/Hush button. The horn will sound.
Replace sensor module after 5 years operation (see page 23).
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WHAT TO DO WHEN THE ALARM SOUNDS:
(1) Open the doors and windows to ventilate the area.
(2) Turn off all fuel appliances where possible. (The alarm can be silenced immediately by
pushing the Test/Hush button).
(3) Evacuate the property leaving the doors and windows open.
(4) Get medical help immediately for anyone suffering the effects of Carbon Monoxide
poisoning (headache, nausea), and advise that Carbon Monoxide poisoning is suspected.
(5) Ring your gas or other fuel supplier on their emergency number. Keep the number in a
prominent place.
(6) Do not re-enter the property until the alarm has stopped. (If the alarm has been silenced
by pressing the Test/Hush button, wait at least 5 minutes. The alarm will then check that the
CO has cleared).
(7) Do not use the fuel appliances again until they have been checked by an expert. In the
case of gas appliances this must be a Registered Gas Installer.
When the CO Alarm detects abnormal levels of CO (above 50ppm CO) the red light starts to flash
and the horn will sound within 90 minutes. At higher levels of CO the alarm will turn on sooner (see
Table B - page 8).
The CO Alarm will automatically reset once the CO has cleared. Pressing the Test/Hush button will
silence the CO Alarm immediately (below 300ppm CO). If CO is still present the red light and horn
will turn on again after about 4 minutes.
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The CO Alarm is no substitute for keeping chimneys and flues clear and in good condition, and all of your
appliances serviced regularly according to the manufacturer’s instructions.
Do not fit alarm until all building work is completed to avoid contamination.
2. CARBON MONOXIDE - THE SILENT KILLER
2.1 WHAT IS CARBON MONOXIDE ?
Congratulations on becoming the owner of an Ei Carbon Monoxide Alarm. This will help protect you and
your household from the dangerous effects of Carbon Monoxide - The Silent Killer. Many are killed each
year, and many more suffer ill health from Carbon Monoxide (CO) poisoning (CO is the chemical symbol,
indicating the molecule has one carbon atom and one oxygen atom). 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.
2.2 SYMPTOMS OF CARBON MONOXIDE POISONING
Most people know that high levels of CO are harmful, however the period of exposure is also important.
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A low level for a long period (e.g. 150 ppm for 90 minutes) can cause the same symptoms (a slight
headache) as a high level of CO for a short period (e.g. 350 ppm CO for 30 minutes). Table A shows how
exposure to different concentrations of CO generally affects people.
Many cases of reported Carbon Monoxide poisoning indicate that while victims are aware they are not
well, they become so disorientated they are unable to save themselves by either leaving the building or
calling for assistance. Young children and household pets may be the first affected.
Table A: Effects of Carbon Monoxide Poisoning
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
Concentration
of CO in Air
Inhalation Time (approx) and Symptoms Developed
ppm = parts per million
*OSHA = Occupational Safety & Health Association
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2.3 WHAT HAPPENS WHEN YOUR CO ALARM DETECTS CARBON MONOXIDE ?
When the Alarm detects potentally dangerous levels of CO, it flashes the red alarm light and then sounds
a loud alarm if the CO persists. The digital display (Model Ei261DENRC only) indicates the CO level in
parts per million (ppm) CO.
Table B below shows how the CO Alarm reacts to different levels of CO gas and exposure time. At higher
levels of CO the alarm turns on sooner. The rate of flashing of the red light indicates the level of CO.
Table B: CO Alarm Response
*
unless it has been in alarm (see 2.4 CO Alarm Memory overleaf)
If your CO Alarm sounds follow the instructions on page 5.
When ventilation is provided by leaving windows and doors open, the CO build up may have
dissipated by the time help arrives and the alarm may have stopped sounding. Although your problem
may appear temporarily solved, it is crucial that the source of the CO is determined and appropriate
repairs made.
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CO Level
(ppm)
Horn sounds
within
Red
Alarm Light
0
50
100
300
Off
60 to 90 minutes
10 to 40 minutes
3 minutes
Off *
1 Flash / 2 Seconds
2 Flashes / Second
4 Flashes / Second
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NEVER IGNORE THE ALARM
Pre-Alarm: When the alarm detects over 50ppm CO the red light flashes every 2 seconds. This helps
locate CO leaks as the unit gives an indication straight away (without this feature the CO level would need
to be at 50ppm CO for 90 minutes for the horn to sound). Note the Pre-Alarm signal may be triggered by
CO coming for example, from cooking with gas, from car engines or from nearby barbecues. This is
usually not a concern unless the Pre-Alarm signal persists until the alarm sounds and the CO source is
unknown.
Note: The CO Alarm may sound if cigarette smoke is blown into it, or aerosols are released nearby.
2.4 CO ALARM MEMORY
When the Test button is pressed the horn will sound, and the red light will only flash if the unit has
previously detected CO and been in alarm. The flash rate indicates the level of CO detected as below:-
- Red light is Off – No CO detected since reset or power up.
- Red light flashes 2 times (in 2 seconds) every 40 seconds - 50 ppm CO detected for approximately
90 minutes since reset or power-up.
- Red light flashes 4 times (in 2 seconds) every 40 seconds - 100 ppm CO detected for approximately
40 minutes since reset or power-up.
- Red light flashes 8 times (in 2 seconds) every 40 seconds - 300 ppm CO detected for approximately
3 minutes.
When the Test button is held, the digital display on the Ei261DENRC model shows the previous peak
reading. This tells you if the unit has detected CO in your absence and helps to detect and locate leaks,
monitor premises etc.
Reset Memory by holding down the Test button for over 20 seconds until the red light stops 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 unit is removed from the mounting plate.
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3. ALARM POSITIONING
3.1 IDEALLY A CARBON MONOXIDE (CO) ALARM SHOULD BE INSTALLED IN:
- Every room containing a fuel burning appliance
- Remote rooms where occupants spend a considerable amount of time
- Every bedroom
However if the number of CO Alarms is limited, the following points should be considered when deciding
where best to fit the alarm(s)
- If there is an appliance in a room where people sleep, place a CO Alarm in this room
- Locate a CO Alarm in a room containing a flueless or open-flued appliance
- Locate a CO Alarm in a room where the occupant(s) spend most of their time (e.g. living room)
- In a bedsit, the CO Alarm should be placed as far away from the cooking appliance as possible, but
near to where the occupant sleeps
- If the appliance is in a room not normally used (such as a boiler room) the CO Alarm should be placed
just outside the room so that the alarm will be heard more easily
3.2 UNSUITABLE LOCATIONS
Do not place the CO Alarm in any of the following areas
- In the immediate vicinity of a cooking appliance
- Outside the building
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- In an enclosed space (e.g. in or below a cupboard)
- In a damp or humid area
- Directly above a sink or cooker
- Next to a door, window, air vent or anywhere that it would be affected by draughts
- Next to an extractor fan
- Where it would be obstructed, e.g. by curtains or furniture
- In an area where the temperature could drop below –10°C or rise above 40°C
- Where dirt or dust could block the sensor
- Where it could be easily knocked or damaged, or where it could be accidentally turned off or removed
- 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)
- Near paint, thinners, solvent fumes or air fresheners
3.3 IF LOCATING THE CO ALARM IN A ROOM WITH A FUEL BURNING APPLIANCE (see Figure 1)
- If it is mounted on a wall, it should be located at a height greater than the height of any door or window
but still be at least 150mm from the ceiling
- If it is mounted on the ceiling it should be at least 300mm from any wall or light fitting
- The CO alarm should be a horizontal distance of between 1m and 3m from the potential CO source
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