IST-2128.KX03.02
Manual de uso / User’s Manual / Manuel d’utilisation
Pag.4/7
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Tel: 02/26 92 28 90 Fax: 02/21 33 734
OPERATIONAL DESCRIPTION
Preheating
: when the central unit is supplied, the yellow LED starts to flash and it means the detector is heating.
After 60 seconds, the green LED switches on and it means the normal working.
NORMAL OPERATING
: the central unit reads the gas concentration through the remote detector
1
st
Red LED:
it switch on if the gas concentration exceeds 5% LEL.
2
nd
Red LED (ALARM 1):
it switch on if the gas concentration exceeds 10% LEL; if within 4 seconds the gas is
not reduced, the
PREAL.
relay will activate. This relay is normally used as a prealarm using a siren (
SE301A).
3
rd
Red LED:
it switch on if the gas concentration exceeds 20% LIE; if the gas persists, the 4
th
red LED
ALARM 2
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
rd
and 4
th
red LED will switch off. If activated, the
FAULT
relay
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.
Yellow, green, 4
th
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
manually breakable
, according to thr in-
stallation requirements, they must be drilling. To facilitate the operation, they have a centering for the drill bit.
Electrical Connection:
The installation must be provided for the mains, a bipolar disconnect switch dedicated for
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
2
or to a distance
of 200 meters using a 3x2.5 mm
2
cable. It is not necessary to use shielded cables.
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.
