olympia electronics BS-375/WP/A User manual

GENERAL
The BS-375/WP/A and BS-376/WP/A explosive
gas detectors are used to measure the
concentrations in % L.E.L. (Lower Explosive
L e v e l ) w h i l e s i m u l t a n e o u s l y p r o v i d i n g
autonomous notification/alarm operations in
case there is a leak of liquid on natural gas.
They are used in commercial and small
industrial areas such as professional kitchens
and burner rooms.
The installation must be done by trained
pers onne l tha t has p r evi o usly r ead t he
instruction manual.
In case on an alarm or gas leak:
Keep calm and follow the instruction below
independent of their order.
- Turn off all burning flames and anything that is
smoking.
- Close all gas appliances (kitchens - burners
cookers etc.)
- Close the central gas supply or canister.
- Open doors and windows in order to ventilate
the area.
Avoid :
-Turning on/off the wall switches or the detector.
-Using a mobile phone in the area that is
suspected to have the gas leak.
If the alarm continues then evacuate the building
921375000_09_007
BS-375/WP/A Waterproof ( IP65) LPG detector with relay
BS-376/WP/A Waterproof natural gas - methane detector with relay
II 3G
Ex ec IIA T6 Gc
TECHNICAL CHARACTERISTICS
10-30V DC / 7.5-21V AC
catalytic
0-50 L.E.L.
5 years (*)
60 seconds
<45 seconds
≤ ±1,5 L.E.L.
≤ ±1,5 L.E.L.
≤ ±4.5 L.E.L./year
Operation LED (green)
Alarm LED (red)
Fault LED (yellow)
Selectable at 10% and 20% L.E.L
3VA
IP65
EN 60079-29-1, ΕΝ 50270, ΕΝ 50271
o
-10 to 60 C
1 atm ±10%
10 to 95% relative humidity (with no condensation)
2 years (**)
180gr.
145 x 85 x 45 mm
ABS/PC, PC
Alarm relay (24VDC, 1A, N.C. & N.O.), latching/non-latching
Connection te rminal to fire alarm panel
Fault relay (24VDC, 1A, N.O.)
Thank you for your trust in our products
Olympia Electronics - European manufacturer
OPERATION VOLTAGE
MAXIMUM CONSUMPTION
% L.E.L ALARM
SENSOR TYPE
MEASUREMENT RANGE
SENSOR LIFE SPAN
SENSOR STABILIZATION PERIOD
DURING STARTUP
RESPONSE TIME (Τ90)
REPEATABILITY
CHANGE
INDICATORS
OUTPUTS / CONNECTIVITY
OPERATION AND STORAGE
CONDITIONS
EXTERNAL DIMENSIONS
TYPICAL WEIGHT
GUARANTEE
PRODUCED IN ACCORDANCE WITH
CONSTRUCTION MATERIAL
MAXIMUM DEVIATION (after calibration)
DEGREES OF COVER PROTECTION
Page 1 from 7
(*) = (Ideal condi tions) When the detector is expos ed to cleaning agents, silic ons and generally
in commerc ial and light industrial env ironments, it is recommended to b e calibrated every year
and its sens or to be replaced every 3 years!
ATTENTION!! DO NOT USE LIQUID GAS (i.e. lighter gas) FOR SENSOR TESTING BECAUSE IT
CAUSES PER MANENT DAMAGE. Use calibration gas up to 50% L.E.L. for this purpose.
(**) = does not cover the gas sensor, if it is exposed to Si, H2S, Pb & h alogenated hydrocarbon.

and inform the gas supply company.
Mounting
Depending on the gas type that we want to
detect, the device should be mounted with the
sensor pointed downward(maximum allowed
deviation ±20°), 20-30cm from the ceiling (for
methane, natural gas) or 20-30cm from the
floor (for propane, butane, liquid gas, LPG), up
to 4 meters (in a horizontal distance) from
probable leak points and away from air drafts
and humidity.
The detectors must not be placed:
- Near ventilators or near doors and windows.
- In an external area.
- In an area that is located near:
- Corrosives or solvents e.t.c.
- Silicones (e.g. insulation, glues, detergents)
- Sulfuric compounds
- halogenated hydrocarbon.
- Organic phosphoric compounds.
Installation
To mount the device, unfasten the 4 retaining
screws.(figure 1). Next, using the diagram on
figure 2,3 and 4 to realize the external
connections of the system.There is a capability
of adjusting the output resistance of the detector
by inserting the resistance adjustment jumper.
When the jumper is inserted, the resistance is
zero and an external resistor can be used.
When the jumper is not placed there is an
internal resistor of 440Ω. The device operates
with 10-30VDC/7.5-21VAC.
ATTENTION!!!
To m a i n t a i n t h e d e g r e e o f I P 6 5 t h e
waterproofing gasket must be fitted to the top of
the chassis of the device. Also after each
opening of the chassis of the device the
condition of the gasket should be checked and
replaced if damage occurs.
Dip-switches settings
The BS-375/WP/A and BS-376/WP/A detectors
(figure 5), have six dip-switches to adjust the
operation mode.
Below you can see these mode settings and
there meaning:
Dip-switch Function
TABLE 1
S1&S2
S3
S4
S5
S6
Dip-switch combinations
Calibration with
clean air
Calibration with
reference gas
Test for outputs
(relay, led, buzzer)
Normal operation
(default)
Latching alarm relay
and red led (defa u l t)
Alarm function at
20% L.E.L.
Alarm function at
10% L.E.L. (defa u l t)
Does not provide any operation
With no latching
Calibration reference gas
concentration 50% L.E.L. (Defa u lt)
Calibration reference gas
concentration 20% L.E.L.
S1S2
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON ON
ON
ON
ON
ON
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-S1 & S2. These switches determine the
operation of special maintenance and test
functions. To conduct these functions, select
the suitable combination with the switches S1
and S2 and press the internal button BT2
(figure 3) for more than 1 second.The function
«output test» activates all the LEDs and the
alarm relay and deactivates the fault relay
while the button is being pressed. For the
calibration function, detailed instructions are
given later on in this manual.
-S3. When the latching function is selected
the n whe n th e det ect o r se nse s a ga s
concentration equal to or greater than % L.E.L
the alarm relay and the alarm led (red) remain
activated even if the concentration of % L.E.L.
returns to normal levels. The deactivate them,
an external button can be used.
-S4. This operation refers to the special
operation calibration function with reference
gas. Via S4 select the concentration of gas
that will be used (20% or 50% L.E.L.)
S5. This setting refers to the concentration in
% L.E.L. that must be detected in order to
activate the alarm relay, the red led and the
zone output. 10% or 20% L.E.L can be
selected. After the selection is made, the
concentration of gas that is considered to be
normal is below 2.5% L.E.L. from the selected
setting, that is below 7.5% or 17.5% L.E.L.
respectively.
Figure 2. Connection with fire detection panel Olympia Electronics
Z1 24M
Fire detection panel
Olympia Electronics
Terminal
resistor
8,2Κ
Figure 1. Interior access, cable entry and indicators
To gain access to the interior remove
these 4 screws
Sensor head located downwards
Cable entry groumet
Operation, Alarm and Fault
Indicator
Capability to install a second
cable groumet.
Page 3 from 7921375000_09_007

Figure 3. Connection with fire detection panel from other company
Ζo ne 10- 30 VDC
Fire detection panel
from other company
Terminal
resistor
Jumper for
Relay resistance setting
Figure 4. Connecting 4 gas detectors to an olympia electronics conventional panel.
Apart from connecting the zone terminal blocks, the detectors must be powered
using the 24V terminal blocks.
The total number of detectors that can be connected to a panel depends on the
current that the panel can supply.
Ζ1
24V_M
Figure 5
Terminal
resistor
8,2Κ
Page 4 from 7921375000_09_007

Alarm relay
The alarm relay is activated when the
concentration % L.E.L. of the sensed area
exceeds the alarm level (10% or 20%). The
relay returns to normal operation when the
gas concentration returns to normal levels.
If the latch function has been selected via
the S3 switch, then the relay remains
activated even if the gas levels return to
normal. When we connect the device to a fire
detection panel, the device needs to have an
alarm lock. This happens that the user can
understand which device has given an alarm.
Fault Relay
The fault relay has one contact that is closed
(N.C.) when the system is powered and there
are no malfunctions. This contact opens when
there is no power or there is a malfunction.
Green LED (operation indicator)
The green LED indicates the presence of the
power supply and special operation states as
described in table 2.
Red LED (alarm indicator)
The red LED is activated when the gas
concentration of % L.E.L. in the covered area
exceeds the selected alarm level (10% or
20%). The LED is deactivated when the gas
concentration returns to normal levels. If
the latching function has been selected via
the S3 micro switch then the LED remains
active (blinks every second) even if the gas
concentration drops to a safe level.
Yellow LED (Fault indicator)
T h e y e l l o w L E D i n d i c a t e s a s y s t e m
malfunction or fault and also some special
states as shown in table 3.
System Calibration
WARNING!!! The calibration procedure of the
detector must be done by qualified personnel
that have previously read the user manual.
-The special calibration function is not
available to the user if there are faults in the
system.
-For the calibration procedure using a
reference gas, the OL-11 calibration kit is
required. (figure 6).
-For the calibration procedure using a
reference gas, a mixture 20% or 50% L.E.L.
with oxygen and nitrogen is used. The
explosive gas catalytic sensors do not operate
without oxygen.
Page 5 from 7
Yellow LED Operation
Permanently activated
Problem with the system settings.
Repeat the clear air and reference gas calibration
procedure.
Probable cause:
-The power supply of the system is out of operation limits
(in combination with the green led operation).
Check the power supply of the system.
-gas sensor malfunction. Replace sensor.
-Central processor malfunction. Service required.
Explanation
TABLE 3
Intermittent brief
illumination once a minute
The current concentration of gas has exceeded the
high detection limit of the device that is 50% L.E.L.
Normal operation is restored automatically when
the gas concentration drops to within the measuring
limits of the unit.
Intermittent operation
every second
Green LED Operation
Permanently activated
Intermittent operation
every second
The system is powered
Explanation
TABLE 2
The system is in the initialize pre-heat phase
of the sensor.
This phase last for 60 seconds
Intermittent brief
illumination once a minute The supply of the system is out of limits
921375000_09_007

-It is suggested to conduct the calibration
test at least once every 12 months.
-During the calibration procedure, conduct
a clean air calibration and then a reference
gas calibration.
To calibrate the device, remove the 4 retaining
screws (figure 1) in order to gain access to the
interior.
Clean air calibration
Take the following steps:
1.Ensure that the environment is clean and
does not contain explosive gases.
2.Select using the switches S1 and S2 (figure
3) the special function «Clean air calibration»
3. Press the button BT2 (figure 3) for more
t h a n 3 s e c o n d s u n t i l t h e 3 s y s t e m
LEDs(green,red and yellow) start to blink with
a one second rate.
4.Wait 4 seconds until the procedure is
completed. This step may last 60 seconds
more in some instances.
When the procedure is finished, the yellow
led and the buzzer operate intermittently.
(intermittent brief activation every second).
At this point there are two instances:
-The green led is lit. This means that the
clean air calibration has finished with success.
Press and hold the button ΒΤ2 for more than 1
second to exit calibration mode and to return
the detector to normal operation.
-The red led is lit. The clean air calibration
procedure did not finish successfully. Press
and hold the button BT2 for more than 1
second to exit calibration mode and to return
to normal operation. You can repeat the
process by following the steps from the
beginning.
Calibration using a reference gas
The steps for calibrating using a reference gas
are the following:
1. Ensure that the environment is clean an free
from explosive gases.
2.Remove the gland with the filter located on
the sensor head (figure 1).
3. In its position install the accessory OL-11-1
of the calibration kit OL-11 (figure 6).
4. Install the part OL-11-2 on the part OL-11-1
(figure 6).
5. Select via the micro-switch S4 (figure 3) the
concentration of the reference calibration gas
that will be used (20% or 50% L.E.L.).
6. Select via the micro-switches S1 and S2
(figure 3) the special operation «Calibration
with a reference gas».
7. Press and hold the button BT2 (figure 3) for
more than 3 seconds until the 3 system LEDs
(gr e en , r ed a nd ye ll o w) st art to bl ink
(intermittent blink once a second) and then
release the button.
8. Open the steady pressure valve (0.3L /
minute) of the reference gas canister.
9. Wait 3 minutes until the procedure finishes.
This step may last 60 seconds more in
some instances.
Wh i l e w a i ti n g fo r t h e p r o c e d u re t o
complete you can cancel it at any time by
pressing the Bt2 button for more than 3
seconds.
When the procedure is finished, the yellow led
operate intermittently (intermittent brief
activation every second). At this point
close the flow valve on the gas canister.
At this point there are two instances:
-The green led is lit. This means that the
reference gas calibration procedure has
finished with success. Press and hold the
button ΒΤ2 for more than 1 second to exit
calibration mode and to return the detector to
normal operation.
-The red led is lit. The reference gas
c a l i b r a t i o n p r o c e d u r e d i d n o t f i n i s h
successfully. Press and hold the button BT2
for more than 1 second to exit calibration
mode and to return to normal operation. You
can repeat the process by following the steps
from the beginning.
After the calibration procedure is finished and
before normal operation remove the part OL-
11-2, unscrew the part OL-11-1 and reinstall
the gland with filter to the sensor head.
Page 6 from 7
Gas
Canister
Detector
Adapter
OL-11-1
Outlet
port
Figure 6
OL-11-2
Inlet
port
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WARRANTY
Olympia Electronics guarantees the quality, condition and operation of the goods. The period of warranty
is specified in the official catalogue of Olympia Electronics and also in the technical leaflet, which
accompanies each product. This warranty ceases to exist if the buyer does not follow the technical
instructions included in official documents given by Olympia Electronics or if the buyer modifies the goods
provided or has any repairs or re-setting done by a third party, unless Olympia Electronics has fully
agreed to them in writing. Products that have been damaged can be returned to the premises of our
company for repair or replacement, as long as the warranty period is valid.
Olympia Electronics reserves the right to repair or to replace the returned goods and to or not charge the
buyer depending on the reason of defection. Olympia Electronics reserves the right to charge or not the
buyer the transportation cost.
HEAD OFFICE
72nd km. O.N.R. Thessaloniki-Katerini
P.C. 60300 P.O. Box 06 Εginio Pierias Greece
www.olympia-electronics.gr
[email protected]
921375000_09_007