Installation - Tecnocontrol SE128K Manuel D'utilisation

IST-2128.KX03.01
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Red LED (ALARM 1): it switch on if the gas concentration exceeds 10% LEL; if within 4 seconds the gas is
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not reduced, the PREAL. relay will activate. This relay is normally used as a prealarm using a siren (SE301A).
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3 Red LED: it switch on if the gas concentration exceeds 20% LIE; if the gas persists, the 4
switches on within 30 seconds and the ALARM relay will activate. It is normally used to stop the gas through the
manual reset solenoid valve (NO or NC) and/or the interruption of the electrical energy.
If it has been installed a manual reset solenoid valve N.C. with magnetic sensor (mod. VR420÷VR480) connected to "AUX" input, in the
case that the gas is still open, the yellow LED and the FAULT Relay will activate (see FAULTS section).
RESET Key: The alarm condition remains latched, LEDs and relays remain activated, even if the gas concentra-
tion is reduced, because the mounted valve is closed. To reset the normal working conditions and/or switch off the
siren push the RESET key.
Buzzer: the PREAL. relay will be deactivated and the red LED flashes, only if the gas concentration is higher than
10% LEL. After 20 seconds, both of them will return in preallarm. (the siren rings)
If it has been used a manual reset solenoid valve NC with the magnetic sensor and in the case that it is snapped, the yellow LED will
switch off and the FAULT relay will be deactivated. (See FAULTS section).
Alarm RESET: The central unit will begin to the normal working, only if the gas concentration is lower than 10%
LEL, the ALARM relay will be deactivated and the 3
will be deactivated and the yellow LED will switch off. (see FAULTS sections).
Warning: Pushing the RESET key, if the gas concentration is higher than F.S., it can happen that the first
PREAL. relay will be deactivated and the first three Rrd LEDs will switch off. The yellow LED will illuminate and the
FAULT relay will activate. A fault on the Remote Detector is most probable in this case. Eliminate the alarm's
cause, if the condition persist pushing the RESET button, please consult the FAULTS section.
FAULTS: The central unit signal different kind of failures activating the yellow LED and the FAULT relay. That is
normally activated. This relay, if necessary, can be used both to signal remotely an occurred damage and to signal
the absence of power to the instrument.
Yellow and green LEDs and FAULT relay activate: this happens when the remote detector is not working. If this
condition do not change, it will be necessary to replace the detector or to send it to the supplier back to repair.
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Yellow, green, 4 red LEDs, FAULT and ALARM relays activate: (ONLY after press RESET key) this happens
when the remote detector is not working or in few cases when there is a higher gas concentration. In this case the
central unit will remain in alarm, as described in the OPERATING>WARNING section. If there are not any gas
leaks, please verify the cable connection between remote detector and central unit. If the condition does not
change, replace the remote detector and/or send it back for reparation to the supplier.
Manual reset solenoid valve NC with magnetic sensor failure: this situation appears ONLY when is installed an electro
valve with magnetic sensor; if it not close the gas, the ALARM relay will activate (gas concentration higher than 20% LEL) and the magnetic
sensor signals to the central unit the this bad working. In this case all led will be lighted and relays will be activated. The failure condition (yel-
low led lighted and FAULT relay activated) will be cancelled if pressing the RESET key, the solution of the problem will be visualized.

INSTALLATION

The SE128K should be installed according to the national disposition in force on the matter.
Positioning: the central unit should be wall-mounted in an accessible position and easily visible. The central unit
should not be installed to the open air.
The remote Detector: it has to be installed as described in the specific instructions attached with it.
After the installation and referred to the gas indicated on the testing label of the remote detector, apply on the
SE128K, the self-sticking label with the name of the calibration gas inserted in the housing.
Mounting: The Fig. 2 shows the instrument size. It has to be wall-mounted by four screw anchors. The normally
closed manually resetting valve for the gas cut-off should be installed outside the room in a clearly indicated posi-
tion and should be protected from rain.
Cable glands: the lower side of the housing has 3 inputs designed for metric cable glands (M20x1.5 that accept
external cables Ø 6÷12 mm). These passages are closed, but they are not
stallation requirements, they must be drilling. To facilitate the operation, they have a centering for the drill bit.
Electrical Connection:
the gas detection system. The device, clearly identified, must act only on Phase and Neutral. If it is necessary, you
may install a surge or lightning protector, etc.
The instrument is supply with non reversible and plug-in terminals. Therefore the cables should be anchored to the
case in order to avoid terminal overstress. The connection to the central unit does not need any hearting. The remote
detector can be placed at a max. distance of 100 meters from the central unit with a cable of 3x1.5mm
of 200 meters using a 3x2.5 mm
Fig. 3 shows the 230VAC powering connection with alarm siren and normally closed manual resetting valve.
Fig. 4 shows the 230VAC powering connection with alarm siren and normally open manual resetting valve.
Fig. 5 shows the 230VAC powering connection with alarm siren and our normally closed manual resetting valve
with positioning sensor (models VR420÷VR480,) to verify, if an alarm occurs, the really gas cut-off.
Fig. 5 shows the 12VDC powering connection with both 12VDC alarm siren and normally closed manual resetting
valve with, for example, our power supply unit PS175 (1,2A) or PS180 (2,5A) with internal 12VDC-7Ah battery to
maintain the system powered on in absence of Main power supply.
supply also to 230VAC.
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Istruzione / User's Manual / Manuel d'utilisation
The installation must be provided for the mains, a bipolar disconnect switch dedicated for
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cable. It is not necessary to use shielded cables.
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and 4 red LED will switch off. If activated, the FAULT relay
manually
In this case, it is possible to connect the power
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red LED ALARM 2
breakable, according to thr in-
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or to a distance
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