Jablotron JA80S Instructional Manual

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The JA-80S wireless fire detector

The JA-80S is a component of Jablotron’s Oasis 80 alarm system. It
is designed to detect the presence of fire inside residential or
commercial buildings. It should not be installed in industrial premises.
The battery-powered detector communicates via OASIS radio protocol
and has a built-in local warning siren.

The detector combines an optical smoke sensor with a heat sensor.
Both sensors have their outgoing signals processed digitally, resulting
in higher false alarm immunity. The optical sensor works using a light
diffusion principle and is very sensitive to the presence of large-sized
particles which are characteristic of dense smokes. By contrast, the
sensor is less sensitive to small-sized particles which are typical of
cleanly burning fires. In particular, the smoke sensor is not capable of
detecting the by-products of cleanly-burning fluids such as alcohols, for
instance,. This deficiency is compensated for by the built-in heat
sensor. This sensor provides a slower reaction when compared to the
smoke sensor, but is much better at reacting to fires with rapidly rising
heat producing only a little smoke.

Exposing fire conditions to the smoke and heat sensors requires
some level of air circulation. It is therefore necessary to install the JA­80S detectors in such a place on the ceiling that (in the case of fire)
smoke masses are forced to go in the direction of the detector’s
position. This can usually be achieved in most buildings. However, the
JA-80 is not suitable for installation in outdoor spaces or interiors with
an extremely high ceiling where fire by-products would not reach the
detector position.

Detection range, detector positioning

The following table shows the detector’s working range in relation to
the height of the ceiling on which the detector is installed. The range is
expressed as the radius of the circular fire detection area for a detector
installed on a ceiling directly above .

Smoke
detection
Heat
detection

Not applicable – meant for a particular ceiling height range
Not suitable –not usually used in such cases
* – the radius of the detection area below the detector

Installation on a horizontal level ceiling

Due to the possible occurrence of a cold air layer right under the
ceiling, the detectors must not be imbedded into the ceiling. The
distance between any point to be protected and an imaginary vertical
line from the detector down to the floor must not exceed the radius
indicated in the table.

Installation on a sloping ceiling

If the JA-80S is installed just under an apex formed by the joining of
two sloping ceilings the values indicated in the table can be increased
by 1% for every degree of slope up to a maximum of 25%. If the
space to be protected is under a saw-tooth type of roof, JA-80S
detectors should be installed under each apex. However, a roof with a
shallow saw-tooth form can be acceptable if the height difference
between the highest and lowest parts of the ceiling does not exceed
5% of the total ceiling height.

Walls, partitions, obstacles, and trussed ceilings

The JA-80S must not be installed closer than 0.5 m from any
wall or partition. A narrow room with a width of less than 1.2m

requires the detector(s) to be placed at a distance of at least one third
of the room’s width away. In the case of separating walls (partitions,
warehouse objects) 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 0.5m is required under the detector. Irregularities in
ceiling shape which do not exceed 5% of ceiling height are considered
insignificant – the ceiling can be regarded as being even and limits
from the table are applicable. However, any irregularity (including

beams) exceeding 5% of the ceiling height is considered to be a
wall with the consequences stated above.

Ventilation and air circulation

The detectors must not be installed directly by a fresh air inlet,

e.g. 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 0.6m of the detector.

Ceiling height (m)

< 4.5 4.5-6 6-8 8-11 11-25 > 25

Not

Not suitable

Not

applicable

7.5* m 7.5* m 7.5* m 7.5* m
5* m 5* m 5* m

suitable

Not

applicable

Not

applicable

Avoid installing the detector in the following locations:

• Places with poor air circulation (niches, corners, apexes of A-
shaped roofs).

• Places exposed to dust, cigarette smoke or steam.

• Places with over-intense air circulation (close to ventilators, heat

sources or air conditioning outlets).

• Kitchens and other cooking places (because steam, smoke or oily
fumes can reduce detector sensitivity).

• Places close to metal objects (which can cause radio
communication screening).

Caution: The most common reason for the detector to be
accidentally triggered is improper detector location.

Installation

Take the following steps:

1. Open the detector (rotate the rear cover)

2. Screw the rear cover onto the desired location

3. Leave the battery disconnected and the cover open and then

follow the control panel or receiver manual.

4. The basics of enrollment are:

1. Enter enrollment mode on the control panel by keying in “1” in
Service mode.

2. Install a battery into the detector to activate enrollment and self­calibration (20 secs) which should be done in clean air without
smoke or fumes at a temperature of about +20°C.

3. Exit enrollment mode by pressing “#”.

4. To enroll a detector after having already connected a battery,
first disconnect the battery, and press and release the test
button to discharge any remaining charge to ready the device
for enrollment.

5. After closing the detector, check that the two halves of the
housing are securely together.

After installing a battery into the detector, allow one minute for

stabilisation. During this minute the LED is continuously lit.

Jumpers

SIREN ON / OFF allows the built-in siren to be disabled (OFF =

disabled)

FIRE / INST selects what the natural reaction of the control panel to

the detector signal will be.

The JA-80S wireless fire detector MHS51500FCC 1

Jumper position = FIRE = the control panel responds with a fire

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alarm, no matter if the system is armed or not.
Jumper position = INST = the control panel responds with a fire
alarm only if the system is armed. The alarm is not indicated by an
internal LED. This feature is useful if the user wishes to allow smoke
in a room from e.g. smoking or a fireplace, while the control panel is
disarmed when authorized people are present in the building.
Warning: In the INST position, while the system is disarmed, it is not
protecting against fire. The FIRE / INST jumper only has an effect if the
detector has a natural reaction assigned to its address in the Oasis
control panel. It also has no effect when used with a UC-8x or AC-8x
receiver. Whenever the detector cover is opened, a tamper signal is
sent.

Testing the detector

The functioning of the detector can be tested by pressing and
holding the test button (e.g. for 1 sec). This activates the siren and the
LED flashes (LED only if the fire reaction is set). The strength and
quality of detector signals can be measured by the control panel in
Service mode. During testing by the test button, the detector transmits
signals which can not trigger fire alarms in the control panel.

Warning: Never start a fire in a building to test the detector.

Instead, use smoke-simulating aerosols for realistic testing.

Silencing the siren during an alarm

During a fire alarm, the detector LED flashes (if the fire reaction is set)
and the built-in siren sounds. Under these conditions the siren can be
silenced by pressing the test button, but the LED will continue to flash
until the smoke clears from the room.

continues to function but with a short LED flash every minute. Battery
replacement should not be delayed by more than two weeks. This should
be done by a qualified technician with the control panel in Service mode.

After battery replacement, test the functioning of the detector using its
test button. Expired batteries should not be thrown into the garbage, but
disposed of according to local regulations.

Removing the detector from the system

If a detector is removed, the control panel announces the removal.
The detector has to be deleted in the control panel before intentional
removal.

Technical parameters

Voltage: Lithium battery type CR14505 (AA 3.0V)
Typical battery lifetime approx. 3 years
Communication band 868 MHz, Oasis protocol
Smoke detection optical, light dispersion
Smoke sensor sensitivity m = 0.11 ÷ 0.13 dB/m to EN 54-7
Temperature detection class A2 to EN 54-5
Fire-alarm temperature +60 °C to+ 70 °C
Acoustic power of the built-in siren 80 dB/m A
Operational temperature range -10°C to +80 °C
Dimensions diameter: 126 mm, height: 65 mm
Complies with EN 54-7, EN 54-5, prEN 54-25, ETSI EN 300220,
EN 50130-4, and EN 55022, EN 60950-1, ANSI C63.4
Can be operated according to ERC REC 70-03, FCC Part 15

FCC ID VL6JA80S

Alarm memory in the detector

Normally the detector’s fire-alarm condition lasts until the smoke clears
from the room and the fire-alarm information is stored in the control
panel‘s memory. If desired and the fire reaction is set, a local memory
in the detector can be enabled by pressing and holding the test button
during battery installation. If this function is enabled, after detecting
fire, the detector‘s fire alarm mode continues until the test button is
pressed.

Fault indication

The detector performs regular self-testing. If a fault is detected in the
detector, its LED will start to flash rapidly. In such a case, disconnect
the battery from the detector, and after about 20 secs, re-connect it. If
after a minute the LED still flashes, then send the detector off for
repair.

Battery replacement

The detector monitors its battery voltage and if too low, a transmission is
sent to the control panel to inform the installer or user. The detector

Jablotron Ltd. hereby declares that the JA-80S is in compliance with the
essential requirements and other relevant provisions of Directives
1999/5/EC, 1989/106/EC

Operation is subject the the following two conditions: 1. This device may not
cause harmful interference, and 2. this device must accept any interference
received, including interference that may cause undesired operation.

The original of the conformity assessment can be found at

www.jablotron.com, Technical support section

modifications no expressly approved by Jablotron could void the user´s authority to
operate the equipment

and complies with part 15 of the FCC rules.

.

CAUTION: Changes or

Note: Although this product does not contain any harmful
materials we suggest you return the product to the dealer or
directly to the producer after use.

The JA-80S wireless fire detector MHS51500FCC 2

466 01 Jablonec nad Nisou
Czech Republic

Tel.: [phone]
fax: [phone]