The JA-82ST wireless combined smoke and heat detector
MZZ57307
The JA-82ST wireless combined smoke and heat detector
The JA-82ST is a wireless component of the JABLOTRON ALARMS
OASIS alarm system. It is used to detect fire hazards in the interior of
residential or commercial buildings. It is not designed to be installed
outdoor or in industrial premises. The detector is powered by three LR6
(AA) type alkaline batteries, which are not included. We recommend you buy
them together with the detector. The JA-82ST 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 and 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 there is also a built-in heat detector
which has a slower reaction but is much better at detecting fire which
generates heat with a small amount of smoke. The detector has a status
reaction (reports its activation and deactivation). The detector should be
installed by a trained technician with a valid certificate issued by an authorized
distributor.
Detector range and location
The smoke detector must be installed so that any smoke easily drifts
into the detector owing to natural thermal circulation, 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.
The detector must always be placed in the section leading to the exit
of the building (escape route), see Figure 1. If the building has a floor
area greater than 150 m2, installation of an additional detector in some
other suitable place is required, see Fig.2.
1
2
3
4
5
1. kitchen,
2. living room,
3. – 6. bedrooms
/
basic coverage
recommended
coverage
Fig 1
1
2
3
4
5
6
Fig 2
1
2
3
6
Fig 3
In buildings and family houses with multiple floors, detectors should be
installed above stairwells. It is recommended to place additional detectors in
rooms where people sleep. See fig 3.
Installation on level ceilings
Place the detector in the center 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 though
(always keep at least a 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
0.5m
TOP
Fig 1
0,9 m
Fig 2
center of the room, best location
acceptable location
Walls, partitions, barriers and lattice ceilings
The JA-82ST detector must not be installed closer than 0.5 m
from any wall or partition.
A narrow space with a width of less than 1.2
m requires the detector to be placed at a distance of at least one third of
its width away. If 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 the
separating wall 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 shall be considered a wall and the above mentioned limitations
shall apply.
Ventilation and air circulation
The detectors must not be installed directly by ventilation or air
conditioning vents, etc…
If the air is supplied through a perforated ceiling,
there must be no perforation within a radius of 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 reduce detector sensitivity, thus cause false alarms and
detection faults).
•
Within a 1 m radius of fluorescent tubes or energy-saving light bulbs
(electrical interference may negatively affect the detector’s radio
communication)
•
In areas with lots of small insects
Please note: The most false alarms are caused by
improper detector location.
See CEN/TS 54-14 standard for detailed installation guidelines.
Installation
Abide by the procedures recommended in the previous paragraphs.
Fig 3: 1– detector cover opening; 2 – detector cover closing; 3 – optical status
signaling; 4 – arrow showing where to insert the detector; 5 – enrollment code;
6 – configuration terminals; 7 – battery holders
1.
Open the detector cover, by turning it anti-clockwise (1)
2.
Attach the removed plastic base
to the desired place with screws
3.
Set the configuration terminals (6) according to the table below.
4. Proceed according to the control panel installation manual. Basic
procedure:
a. Switch the control panel to the Service mode and enter the
enrollment mode by pressing 1.
b. When you insert all batteries into the detector, the enrollment code
is sent to the system – its sending is confirmed with a short flash of
the LED indicator (3).
