detector
).
A terminal resistor (5,6K
Ω)
should be
installed on the end of the line(see figure 2).
On the
EXT BUZ
terminal we can connect an
external buzzer
BS-542.
An external sensor
(BS-692, BS-693)
can be
connected to the terminals
+VS, GND, S.
The
external sensor uses a specific protocol to
communicate with the unit.You can connect only
one external sensor with cable at least diameter
3*0.75mm and length no more than 50m.
WARNING
!!
If an external sensor is installed then
the positions 1-2 on JMP2 must be linked.
Failing
to link these two point will result in non-
communication between the two devices. The
link should be done when the unit is not operating.
Sensitivity
The
BS-690
detectors are activated when the
content of gas (propane or butane), in the
monitored area, exceeds
5 - 15%
of the lower
explosive level
(L.E.L).
The
BS-691
detectors are activated when the
content of gas (methane), in the monitored area,
exceeds
5 - 15%
ofthe lower explosive level
(L.E.L).
The same detectors can also be used as
an alcohol vapor detector.
The are connected and operate with the mains
power supply voltage of
230VAC.
When the detector is activated, an internal
sounder
(
buzzer)
is sounded and the internal
relay is activated. The relay can be used to control
an electro-valve.
The buzzer stop sounding when
the gas content drops below
5-15%
of the
L.E.L.
The electro-valve is reset manually.
Indications LEDS and operation
The green LED shows the presence of the mains
power supply.
When first installed, the green LED
blinks for 20 seconds until the sensor
compensates to its surroundings.
When the red LED is lit then the unit is in alarm
mode
.
Alarm mode can be triggered from:
a
)
The sensor of the unit
b
)
The external sensor
(BS-692, BS-693)
c
)
From a fire detection zone
.
When the yellow LED is lit the unit has an fault
which can because by:
a
)
The sensor of the unit
(
e.g
.
Dis-connected
sensor)
.
b
)
The external sensor (e.g. Communication
problem)
c
)
The fire detection zone
(
e.g. Open or short
circuit condition)
.
A blinking red LED means that there was an
alarm condition but it has now passed. The same
applies for a blinking yellow LED and the fault
condition.
When the test button is pressed, the system is
tested and restarted. During the test the internal
circuits are checked, the relay is activated and the
internal buzzer sounds.
Also, during the test all
alarm and fault indications are reset. Finally the
fire detection zone is reset.
After the test and if an electro-valve was
connected to the unit, a manual reset of the
electro-valve must be done.
Installation of an electrovalve
The gas supply is automatically turn OFF in the
event of an alarm or fault condition. The electro-
valve can only be reset manually by the user, by
pressing on point
“Α”
as show in figure 1.
Depending on the type of electro-valve used, the
corresponding connection diagram is shown in
figure 4.
Care must be taken to position the link of
JMP1
in the correct position
.
It is suggested that
this unit is used in cooperation with
Οlympia
Electronics
Electro-valves type
BS-684 (12V
N.O.)
Or
BS-682 ( 230VAC N.O.).
The
connection cable, when you use BS-684, must
be at least 2x2.5mm diameter and no more than
4m length.
There is a screw behind the plastic cover
Figure
1.
Remove the plastic cover
Remove the plastic cover using a flat screwdriver
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