jablotron JA-15ST Manual

JA-15ST Wireless combined smoke and heat detector
The JA-15ST is a component of the JA-10 alarm system. It is used to
detect fire hazards in the interior of residential or commercial buildings. The
detector can be installed in mobile homes or caravans. The product is not
designed to be installed in industrial premises. The JA-15ST detector uses
wireless communication and it is powered with three AA batteries.
The detector indicates a fire hazard using the built-in LED indicator and
acoustic signalization.
The JA-15ST consists of two independent detectors – an optical smoke
detector and a heat detector. The optical smoke detector works on the
principle detection of scattered light. It is very sensitive to large dust
particles which are present in dense smoke. It is less sensitive to smaller
particles generated by the combustion of liquids such as alcohol. That is
why the fire detector also contains a built-in heat detector which has
a slower reaction but is much better at detecting fire which generates only
a small amount of smoke.
Detector range and location
The smoke detector must be installed so that any smoke easily drifts
into the detector owing to natural thermal currents, e.g. on the ceiling. It is
suitable for residential buildings but not suitable for free spaces, outdoor
environments or interiors with extremely high ceilings (above 5 m) where
fire by-products can disperse over a large area – the smoke would not
reach the detector position.
Do not install the detector in an environment exposed to dust, cigarette
smoke and steam. Dusty environments shorten the detector's lifespan.
The detectors should be installed by a trained technician with a valid
manufacturer's certificate.
Detectors should be installed in the building according to the project
documentation. If such documentation is not available, their position
should comply with the effective standards for fire alarm signalling
systems.
The detector must always be placed in the section leading to the exit
of the building (escape route), see Fig. 1. If the building has a floor area
greater than 150 m 2 , installation of an additional detector in some other
suitable place is required, see Fig.2.
Fig 1
Fig 3
Fig 4
centre of the room, best location
acceptable location
In multi-storey flats and family houses the detector should be installed
above the stairs. It is recommended to place additional detectors in rooms
where people sleep. See Fig 3.
Installation on level ceilings
Place the detector in the centre of the room if possible. The detector
must not be recessed into the ceiling due to the possible existence of
a cool air layer on the ceiling. Never place the detector in the corner
of the room (always keep at least 0.5 m distance from the corner - see
Fig 4). There is an insufficient circulation of air in the corners.
Installation on sloping ceilings
If the ceiling is not suitable for mounting on a level surface (e.g. a room
under a roof ridge), the detector can be installed as in Fig. 5.
JA-15ST Wireless combined smoke and heat detector
Fig 2
1. kitchen,
2. living room,
3. – 6. bedrooms

/ basic coverage
 / recommended
coverage
0,9 m
Fig 5
Walls, partitions, barriers and lattice ceilings
The JA-15ST detector must not be installed closer than 0.5 m from
any wall or partition. A narrow room with a width of less than 1.2 m requires
the detector(s) to be placed at a distance of at least one third of the room's width
away. In a case when a room is separated into sections with furniture,
racks or semi partition walls which do not reach the ceiling, the space is
considered to be fully separated if the gap between the top of these and
the ceiling does not exceed 0.3 m. A free space of at least 0.5 m is required
under and around the detector. Any irregularities of the ceiling (e.g. girders)
exceeding 5 % of the ceiling height should be considered a wall and the above
mentioned limitations should apply.
Ventilation and air circulation
The detectors must not be installed directly by ventilation or air
conditioning vents. In the case of air being supplied through a perforated
ceiling, each detector must be placed so that no perforation hole occurs
within 0.6 m of the detector.
Avoid installing the detector in the following locations:
places with poor air circulation (niches, corners, apexes of A-shaped
−
roofs, etc.)
− places exposed to dust, cigarette smoke or steam
− places with over-intense air circulation (close to ventilators, heat sources,
air conditioning outlets, etc.)
in kitchens and other cooking places (because steam, smoke or oily
−
fumes can cause false alarms or reduce detector sensitivity).
− beside fluorescent lights or energy-saving light bulbs (electrical
interference can cause a false alarm)
in areas with lots of small insects
−
Warning:
Most false alarms are caused by improper detector
See CEN/TS 54-14 standard for detailed installation guidelines.
Installation
When installing the detector, abide by the procedures recommended in
the previous paragraphs.
Fig 6: 1– detector cover opening; 2 – detector cover closing; 3 – optical
status signalling; 4 – arrow showing where to insert the detector;
5 – production code; 6 – configuration terminals; 7 – battery holders;
8 – button for test; 9 – locking screw.
1. Open the detector cover, by turning it anti-clockwise (1)
2. Attach the plastic base to the selected place using screws
3. Use the terminals (6) to set the required detector function – see
the table below
ON
Siren disabled
1
Siren enabled
OFF
(EN 14604)
ON Memory disabled
Memory enabled
2
OFF
(EN 54-7 and EN 54-
5)
ON
OFF
When the detector is installed in caravan trailers, use only
the "smoke only" or "both smoke and heat" settings.
1 / 2
location.
3 OFF
Smoke (EN 14604 or
EN 54-7) or heat
4 OFF
(EN 54-5)
3 OFF
Smoke only (EN 14604
or EN 54-7) (not heat)
4 ON
3 ON
Heat only (EN 54-5)
(not smoke)
4 OFF
3 ON
Both smoke and heat
(both conditions at the
4 ON
same time)
MLW21205