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240V Optical Alarm with 9V Battery Back-Up 1163
240V Optical Alarm with Sealed 10 Year Battery Back-Up 1164
1 P a g e
Description
Optical Smoke Alarms with a replaceable 9V battery back-up or a 10-year
sealed for life battery back-up version. The alarms mount onto a wiring
base.
Multiple optical alarms can be interlinked together to provide detection
and audible warning over larger areas or floors.
Alarms suitable for BS 5839-6 requirements for Grade D1 and D2 systems.
All products must be installed by a competent person in accordance BS
7671, the current edition of the IET Wiring Regulations.
Where to Locate
Smoke alarms needs to be installed in circulation areas of a dwelling, for
example, hall ways and landing, as a minimum, and ideally heat alarms
need to be installed in kitchens, as required by BS 5839-6, Code of Practice
for the design, installation, commissioning and maintenance of fire
detection and fire alarm systems in domestic premises.
Ideally, alarms should be located:
• In living and sleeping areas.
• On each floor of the dwelling.
• In every room where electrical appliances are operated, e.g. portable
heaters, tumble dryers.
• In each room where there are fossil fuel burning appliances, e.g. gas
boilers, cookers, fireplaces.
It may be necessary to install more than one smoke alarm in an area, e.g.
in halls/corridors that are more than 9m long. See diagram 1.
Diagram 1
Positioning of Alarms
• Smoke and heat from and burning materials rise to the ceiling and
spread 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 preferred in ordinary residential dwellings.
• If smoke alarms are not positioned centrally on a ceiling within a
room, it is recommended to locate it a minimum of 300mm (12”)
from the side wall (see Diagram 2). If space restrictions prevent this,
e.g. narrow corridors/landings, it must not be located closer than
300mm (12”) from the side wall.
Diagram 2
• Put a smoke alarm at both ends of a hallway/corridor or large room if
it is more than 9000mm (30’) long.
• In rooms with an A-shaped peaked ceiling, a sloped or cathedral
ceiling, install a smoke/heat alarm between 500mm and 1500mm
from the highest point of the ceiling. (See Diagram 3).
Diagram 3
• To limit false alarms as laid within BS 5839-6, it is recommended that
smoke alarms should not be installed within 900mm (3’) of the
following: the door to a kitchen, the door to a bathroom containing a
tub or shower. If space restrictions prevent this, it must not be
located closer than 300mm (12”) from the side wall.
•
Also, alarms should be positioned away from forced air supply ducts
used for heating or cooling, ceiling or whole house ventilating fans,
or other high air flow areas to limit false alarming.
• It is recommended that smoke alarms are not installed within
300mm of light fittings.
Do Not Install Smoke Alarms in the Following Places
• Alarms should not be positioned in hard-to-reach areas, such as
above stairwells, that make it difficult to gain access for maintenance
• In unventilated garages as vehicle exhaust fumes may cause false
alarm.
• In an area where the temperature may fall below 0
o
C or rise above
40
o
C, such as garages and unfinished attics.
• In dusty areas. Dust particles may cause nuisance alarm or failure to
alarm.
• In very humid areas (greater than 93% R.H.), e.g. bathrooms.
Moisture or steam can cause nuisance alarms.
• In insect-infested areas.
• Near fluorescent lights. Electronic “noise” may cause nuisance
alarms.
Important:
These alarms are primarily intended for use in single
family occupancy private dwellings.
300mm Minimum
Recommended
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