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
S
1&
S
2
S
3
S
4
S
5
S
6
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
(
default
)
Alarm function at
20%
L.E.L.
Alarm function at
1
0%
L.E.L.
(
default
)
Does not provide any operation
With no latching
Calibration reference gas
concentration
50%
L.E.L.
(
Default
)
Calibration reference gas
concentration 20
%
L.E.L.
S
1
S
2
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
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