FireAngel NG-9B User manual

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User Manual
NG-9B NATURAL GAS ALARM
Detects gas from household appliances
NG-9B

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NG-9B
GN4729 / R2
Sprue Safety Products Ltd.
Vanguard Centre, Sir William Lyons Road, Coventry CV4 7EZ UK
A Sprue Brand
Technical Support: 0800 141 2561 / EIRE dial: 1-800 523171
Email: tec[email protected] / Web: www.reangel.co.uk
Do not ignore any warning from your Natural Gas Alarm!
Vacate the property and immediately call the UK Gas
Emergency Service Helpline 0800 111 999.
Designed to meet:
BS EN 50194-1:2009

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Features . . . . . . . . . . . .4
Natural Gas . . . . . . . . . .4
Where to install your
alarm. . . . . . . . . . . . . .5
How to install your alarm. . .7
Battery installation /
replacement . . . . . . . . . .7
Operating features . . . . . .8
Note: This user manual is also available in large text and other
formats. Please call 0800 141 2561 for further information.
Understanding the
product’s indicators . . . . . .9
Maintaining your alarm. . .11
What to do in the event
of an alarm . . . . . . . . . 11
Technical information. . . .12
Disposal . . . . . . . . . . . 13
Warranty . . . . . . . . . . . .13
CONTENTS

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This NG-9B alarm detects Natural Gas
(also known as Methane, Flammable or Combustible Gas).
FEATURES
• Battery powered for simple no fuss
installation and maintenance.
• An advanced low power semi-
conductor sensor designed to
accurately measure Natural Gas in
your home before explosive levels are
reached.
• Detects Natural Gas continuously.
• Resistant to false alarms caused by
normal household contaminants.
• Sounds a loud 85dB alarm (at 1metre
(3 feet)) to alert you in case of an
emergency.
• SmartTest / Silence & Reset button.
• Designed to meet BS EN 50194-1:2009.
• Will detect Natural Gas for 5 years
before the alarm requires replacement.
• 5 year warranty.
NATURAL GAS
Natural Gas which is primarily Methane
(CH4), sometimes referred to as swamp
gas, is lighter than air and will rise.
IMPORTANT: The gas alarm you have
purchased is calibrated to detect Natural
Gas. If your gas supply comes from a
portable cylinder or storage tank it is more
likely to be propane, butane or a mixture
of these two Liquefied Petroleum Gases
(LPG). This alarm is not suitable for
detecting LPG.
Natural gas is dangerous when the
concentration is high enough to become
explosive. The lowest concentration point
at which the combustible gas may become
explosive is called the Lower Explosive
Limit (LEL). FireAngel gas alarms are set to
alarm when the gas concentration reaches
10% of LEL.

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Natural gas is odourless, therefore
additives known as stench agents are
mixed with the gas so it can be smelt. This
stench agent may be smelt at very low
concentrations of the gas and therefore it
may be possible to smell the gas prior to
the alarm giving an alarm signal.
If your alarm is in alarm immediately
telephone The UK Gas Emergency Service
Helpline 0800 111 999.
Tell the operator that you have a Natural
Gas alarm in your home and it is in full
alarm indicating that it has detected
dangerous levels of gas in the air and you
are concerned that gas is leaking.
Common Sources of Natural Gas:
• Cookers or other Gas powered
appliances
• Boilers
• Gas Fires
Do not: Ignore any warning from your gas
alarm!
WHERE TO INSTALL
YOUR ALARM
The Natural Gas alarm is suitable for use
in domestic premises and static caravans
with a mains gas supply.
WARNING: This alarm will only indicate
the presence of Natural Gas at the sensor.
Natural Gas may be present in other parts
of the property.
The alarm should be installed in any room
where a gas leak is possible to occur. The
most likely sources for a Natural Gas leak
are cookers, boilers and gas fires.
Where in the room should the alarm
be located?
Firstly you must confirm the type of gas in
your home.
Your NG-9B alarm is designed to detect
Natural Gas and is clearly marked with this
gas type.

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Gas Alarm
Within 5m
Within 30cm
from
ceiling
As Natural Gas is lighter than air it will
naturally rise and build up at a high level
in the room. The NG-9B alarm should
therefore be placed above the highest
window, door or vent in the room. Ideally
within 30cm of the ceiling.
Do not locate your alarm:
• in an enclosed space (e.g. in a
cupboard or behind a curtain);
• directly above a sink;
• next to a door or window;
• next to an extractor fan;
• in an area where the temperature may
drop below −10 °C or exceed 50 °C;
• where dirt and dust may block the
sensor;
• in a damp or humid location.
• Its location should not be too close to
openings or ventilation ducts since
the airflow at these places may be
high and may locally decrease the gas
concentration.
The alarm should not be installed
immediately above or next to gas
appliances since small gas releases may
occur before ignition that may result in
unwanted alarms. It should be noted
that installation near cookers may lead
to:
• alarms produced by cooking vapours
and not gas escapes;
• contamination by grease that may
impede the correct operation of the
alarm.
90mm
Drill hole spacing

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Caravans and boats
IMPORTANT: Your NG-9B Natural Gas
alarm has not been designed or calibrated
to detect LPG which is most commonly
found in caravans and boats and as such is
not suitable for these vehicles.
HOW TO INSTALL
YOUR ALARM
NOTE: This apparatus should be installed
by a competent person who feels able to
install it according to the instructions.
Firstly write the installation date on your
alarm in the area provided.We recommend
that your alarm is installed on the wall.
To mount on a wall:
Please ensure that you use the screws
provided, as they were chosen specifically
for use with this product. Use the template
provided for guidance on marking hole
positions. Drill holes into the wall. Insert
the plastic wall plugs. Screw in the screws.
Ensure screws are protruding from the
wall by 3mm to allow alarm to slot onto
screws.
To place on a shelf:
The base of the alarm has been designed
to allow it to stand freely on a shelf.
WARNING: When placing on a shelf,
please adhere to the same positional
recommendations as described above.
Ensure the alarm is at the recommended
height.
BATTERY
INSTALLATION /
REPLACEMENT
aIf the alarm is already wall mounted
then unhook it from the mounting
screws.
bRemove the battery cover located on the
back of the alarm.
cReplace the batteries with 2 x approved
1.5 volt AA size lithium batteries (see
page 12 for recommended batteries),
making sure the batteries are the correct
way round.
IMPORTANT: Use of batteries other
than those recommended may have
a detrimental effect on the alarm’s
operation.
d Replace the battery cover and return the
alarm to its original position.

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Press ridged
area in and
slide door out
to reveal battery
compartment
eIf you have followed all of the
above steps correctly, your unit will
begin monitoring for Natural Gas
immediately.The Power LED will flash
green once per minute to indicate that
the alarm is receiving power from the
batteries and is fully operational.
fTest that the sounder is working and the
batteries are providing power to the unit
by pressing and holding theTest button
for 1 second.The sounder should chirp
once as soon as the button is pressed,
the alarm LED will flash red and the
power / fault indicator will flash green
and yellow once to indicate that the
alarm is working.
WARNING: Prolonged exposure to the
sounder in close proximity to your ears
may damage your hearing.
Under normal operating conditions, the
batteries should last for at least 12 months.
The alarm will not detect Natural Gas
when the batteries are drained.
WARNING: Prolonged exposure to
extreme high or low temperatures may
reduce the life of the batteries.
OPERATING FEATURES
Your alarm offers many features which set
it apart from other Natural Gas alarms on
the market today.
Alarm Test, Silence and Reset Button
• Test the sounder, batteries and circuitry.
• Silence the sounder for 3 minutes (only
when the gas detected is less than 20%
LEL).
• Reset the red alarm LED after an alarm
activation when the air is clear.
Testing the sounder, batteries and
circuitry
Test the sounder, batteries and circuitry
by pressing and holding the Test button

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for approximately 1 second to confirm
that the alarm is operating properly. The
green, red, then yellow LEDs will flash,
and the sounder will sound indicating that
the alarm is working and the batteries are
providing power to the unit. This test for
the sounder, batteries and circuitry should
be performed monthly.
Silence the alarm
The alarms loud sounder can be silenced
for a short period (3 minutes) by pressing
and holding down the Test button for
approximately 1 second until the sound
stops.The red alarm indicator will continue
to flash every second.
To reset the alarm indicator
If the alarm has alarmed, once the air is
clear the sounder will stop. It is possible
that an alarm event may happen due to
an intermittent occurrence when no one
is in the building.The red led indicator will
remain flashing until it has been manually
reset.
To reset the red alarm press theTest button
twice within 2 seconds. The red LED will
turn off, should gas be detected, an alarm
will sound within 30 seconds.
UNDERSTANDING
THE PRODUCT’S
INDICATORS
The product is designed to immediately
alarm when it is exposed to flammable gas
at a level of 10% of the Lower Explosive
Limit (LEL) or higher.
When flammable gas is detected a loud
audible signal will be emitted and the
alarm LED will flash red every second.
Fault / End of life signal:
The unit continuously checks the settings of
its sensor and circuitry. If any of these settings
are found to be incorrect then the alarm will
emit a audible chirp twice every 5 minutes
for up to 30 days. Replace unit immediately.
IMPORTANT: This does NOT mean that
the alarm has detected Natural Gas.
Low battery
If the batteries are low then the alarm will
emit a single audible chirp every minute for
up to 30 days. Replace batteries immediately.
If the product continues to chirp despite
having new batteries and the product is still
within warranty then contact Technical
Support on 0800 141 2561. If the
product is no longer in warranty replace it
immediately!

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LED Indicator Table
Status
Power
LED
Green
LED
Red
LED
Yellow
Audible
Signal
Action
Required
Normal
operation
- every
25-30 secs
Test button
pressed
- single
flash
- single
flash
- single
flash
- single
chirp
ALARM - every
second
- chirps
rapidly on
and off
Alarm: Check if
there is a gas
hazard and
vacate property.
Telephone Gas
Emergency
Service Helpline
0800 111 999.
Alarm has
occurred,
pending
reset
- every
second Reset alarm
Low
battery
- every
25-30 secs
- single
chirp every
minute
Replace battery
within 30 days
Fault / End
of Life
- every
25-30 secs
- chirps
twice every 5
minutes
Replace alarm
immediately

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MAINTAINING
YOUR ALARM
Your alarm will alert you to potentially
hazardous Natural Gas concentrations in
your home when maintained properly. To
maintain your alarm in proper working
order, and to ensure that the sensor will
last for the lifetime of the product, it is
recommended that you:
• Test the sounder, batteries and circuitry
of your alarm once per month by
pressing and holding theTest button for
1 second.
• Gently vacuum the case with a soft
brush attachment every 3 months.
To prevent the possibility of contaminating
the sensor in your alarm and thus affecting
its reliability:
• Never use cleaning solutions on your
alarm. Simply wipe with a slightly
damp cloth.
• Do not paint the alarm.
• Do not spray aerosols on or near the
alarm.
• Do not use any solvent based products
near the alarm.
Do not attempt to repair your alarm. Do
not remove any screws or open the main
casing of your alarm. Any attempt to do so
may cause malfunction and will invalidate
the warranty.
WHAT TO DO IN THE
EVENT OF AN ALARM
WARNING: A loud alarm is a warning that
potentially dangerous levels of Natural
Gas are present. Never ignore this alarm,
take immediate action.
Remain calm, and carry out the
following actions:
• Extinguish all naked flames, including
all smoking material;
• Turn off all gas appliances;
• Do not touch any electrical equipment,
including the gas detection apparatus;
• Turn off the gas supply at the gas main
control or the storage tank;
• Open doors and windows to increase
ventilation;
• Do not use a telephone in the building
where the presence of gas is suspected.

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If the alarm continues to operate, even
after an alarm resetting action where
appropriate, and the cause of the leak is not
apparent or cannot be corrected, vacate
the premises and IMMEDIATELY NOTIFY
the gas supplier and the gas emergency
24 hour service so the installation may be
tested and made safe, and any necessary
repair carried out.
Care should be taken with battery-
powered apparatus, since the cessation
of an alarm may be due to the battery
being discharged, rather than a decrease
in ambient combustible gas level.
The premises should be re-entered with
care and only after checking combustible
gas concentrations to confirm the absence
of the hazard.
If the alarm stops and the reason for
the alarm having sounded is identified,
(for example a gas tap switched on with
the burner unlit), after stopping the
gas immediately telephone the UK Gas
Emergency Service Helpline 0800 111 999.
Advise that you have a Natural Gas alarm in
your home and it is in full alarm indicating
that it has detected dangerous levels of
gas in the air and you are concerned that
gas is leaking.
TECHNICAL
INFORMATION
Alarm Specications: Model NG-9B
Gas Detected: Type B - Natural Gas Alarm
- also known as Methane, Flammable or
Combustible Gas.
Sensor Type: Semi-conductor
Sensor Life: 5 years
Calibration: Calibrated to alarm at 10%
LEL +/- 2.55 LEL
Alarm Sound Level: 85dB at 1m/3 feet
Recommended Batteries: Size AA
Lithium, Duracell Ultra Lithium AA LF1500,
Energiser Lithium AA L91, GP Lithium AA
GP15LF
Battery Life: Exceeds 1 year under
normal operating conditions, replaceable
Temperature Range:-10ºC to 50ºC
Operating Humidity Range: 5 - 95% RH
Weight (inc. batteries): 125 grams
(4.4oz)
Designed to meet: BS EN 50194-1:2009
This Natural Gas alarm is designed to
continuously monitor for Natural Gas.
Replace unit after 5 years of operation.

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DISPOSAL
Waste electrical products should not be disposed of
with regular household waste. Please recycle where
facilities exist. Check with your local authority, retailer
or technical Support for recycling/disposal advice as
regional variations apply.
The batteries should be removed before disposal of
the alarm. Both the batteries and the alarm should be
disposed of in line with current regulations.
WARNING: DO NOT ATTEMPT TO OPEN - DO NOT
BURN.
WARRANTY
Warranty coverage
Sprue Safety Products Ltd warrants to the original
purchaser that its enclosed Natural Gas alarm be free
from defects in materials and workmanship under
normal residential use and service for a period of 5
(five) years from the date of purchase.
Provided product is sent back to Sprue Safety
products with proof and date of purchase, Sprue
Safety Products Ltd hereby warrants that during the
5 (five) year period commencing from the date of
purchase Sprue Safety Products Ltd, at its discretion,
agrees to replace the unit free of charge.
The warranty on any replacement FireAngel Natural
Gas alarm will last for the remainder of the period of
the original warranty in respect of the alarm originally
purchased – that is from the date of original purchase
and not from the date of receipt of the replacement
product. Sprue Safety Products Ltd reserves the right
to offer an alternative product similar to that being
replaced if the original model is no longer available
or in stock.This warranty applies to the original retail
purchaser from the date of original retail purchase
and is not transferable. Proof of purchase is required.
Warranty disclaimers
This warranty does not cover damage resulting
from accident, misuse, disassembly, abuse or lack
of reasonable care of the product, or applications
not in accordance with the user manual. It does not
cover events and conditions outside of Sprue Safety
Products Ltd’s control, such as Acts of God (fire,
severe weather etc). It does not apply to retail stores,
service centres or any distributors or agents. Sprue
Safety Products Ltd will not recognise any changes
to this warranty by third parties. Sprue Safety
Products Ltd shall not be liable for any incidental or
consequential damages caused by the breach of any
expressed or implied warranty. Except to the extent
prohibited by applicable law, any implied warranty of
merchantability or fitness for a particular purpose is
limited in duration to 5 (five) years.
This warranty does not affect your statutory rights.
Except for death or personal injury, Sprue Safety
Products Ltd shall not be liable for any loss of use,
damage, cost or expense relating to this product
or for any indirect, or consequential loss, damages
or costs incurred by you or any other user of this
product. The warranty does not cover the batteries
which are considered user-replaceable parts.

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