Jumper position for manualrearmed E.V. normally opened.
Jumper position for manualrearmed E.V. normally closed.
CHARACTERISTICS OF THE OUTPUT
The central unit it’s provided with an relay in exit with free contacts
without tension,contact range 8A 250Vac/ 30Vdc.
CONNECTION FOR VALVE AND REMOTE
The detector furthermore by connecting terminal (5-6) active in shut
down for an remote sensor:
For Methane: cod. SE296KM or SE230KM/SE233KM.
For LPG: cod. SE296KG or SE230KG/SE233KG.
Configuration SE230K/SE233K + SE230K/SE233K have IMQ certifi-
cation.
Configurations that includes SE296K do not have IMQ certification.
If the connecting terminals (5-6) are not used, the have to be left dis-
connected. We remind that the valve should be installed on the gas
pipes outside the room under control, since protection is use less if a
gas leak occurs at the beginning of the gas pipe.
SE230K
ATTENTION: If during operation takes place a momentary absence of power supply,
the N.C solenoid valve, closes automatically and you will need to reset it after a voltage
recovery.
In this case of alarms the coil’s relay is
maintained de-energized constantly.
In case of alarm, the contacts 8 and 9
(Fig. 3 and Fig. 4) will be closed up to
end of the alarm.
SE233K
230Vac-50/60Hz 230Vac-50/60HzNormally Open E.V.
230Vac-50/60HZ
12Vdc 12Vdc
Normally Open E.V.
12Vdc
230Vac-50/60Hz 230Vac-50/60Hz
Normally Close E.V.
230Vac-50/60HZ
12Vdc 12Vdc
Normally Close E.V.
12Vdc
The use of different systems from the calibration gas sample cylinder,
makes it impossible to verify the proper functioning of the sensor.
Even when you want to recreate the actual conditions of dangerfor
which protection the gas sensor is installed, this is inapplicable.
As an example, the supply of gas from the normal home kitchenequip-
ment.
Our detectors are calibrated at 10% LEL (Lower Explosive Limit).
The explanation is simple: lets suppose to have a kitchen measuring 3
meters wide by 4 meters in length, and with height of 3 meters.
- The volume of the kitchen is equivalent to 4 x 3 x 3 that is 36 m3,equal
to 36,000 Lt.
When 4,4% of the volume of the kitchen, is filled of natural gas, in the
room a dangerous mixture is created.
- This 4,4% is called L.E.L (Lower Explosive Limit).
- In our case a 4,4% of 36.000Lt correspond to 1584Lt. (L.E.L.).
- Our detectors, according to the IMQ approvals operate at 10% of
the LEL, then 10% of the value of 1584Lt, that in this case is 158,4LT,
THEREFORE ONE THENTH OF THE LOWER EXPLOSIVE LIMIT
(L.E.L.).
Taking into consideration the fact that the house cooker has a gas noz-
zle of a few tenths of a millimetre and that the gas pressure is of a few
millibars, the gas flow would allow the delivery of 158,4 litres of gas
(sufficient to make the sensor react) only after hours.
Even with broader gas supply sources, the peculiar and strong smell
of natural gas, makes impossible the human presence and it make evi-
dent the serious danger situation even when the natural gas saturation
is still too little to allow the explosion.
LOWER EXPLOSIVE LIMIT (L.E.L)
We recommend to contact the installer at least once a year for a
general inspection.
IMPORTANT: do not use pure gas, such as a lighter directly on
the sensor since the sensor could be damaged.
PERIODICAL TESTING
Connection for normally opened E.V. (230Vac), manual rearmed (relay nor-
mally deactivated) or by a second detector (SE230K).
Connection for normally closed E.V. (230Vac), manual rearmed (relay normally
activated) or by asecond detector (SE233K).
Connection for normally closed E.V. (12Vdc), manual rearmed (relay normally
activated) or by asecond detector (SE233K).
Connection for normally opened E.V. (12Vdc), manual rearmed (relay normally
deactivated) or by a second detector (SE230K).
SE230K + SE230K + Normally Open E.V.
SE233K + SE233K + Normally Close E.V.
Fig.3
Fig.4
Fig.5
Fig.6
34
In this case the coil’s relay is main-
tained energized constantly to ensure
intrinsic safety relay operation.
In case of alarm, the contacts 7 and 8
(Fig. 5 and Fig. 6) will remain closed
until the end of the alarm.
SE230K SE230K
SE230K SE230K
SE233K SE233K
SE233K SE233K
The instrument has to be installed:
- the detectors SE230KM and SE233KM for methane at a maximum
