Geca SE235KM User manual

GENERAL DESCRIPTION
LUMINOUS AND ACOUSTIC SIGNALISATIONS
LIGHTING DELAYS
The catalytic sensor presents in the SE235K gas detector, needs to
be heated for about one minute to working in a correct way and for
that reason when the detector is lighted on the green led will lighten to
indicated that the sensor is in the heating phase. During this time, all
the detection functions will be inhibited.
These gas detectors are provided, on the front panel, by three luminous
signalisations:
-GREEN LED (ON): indicates that the instruments is powered.
-YELLOW LED (FAULT): Indicates that the gas sensor is damaged.
-RED LED (ALARM): Indicates that the gas concentration
measured in the air exceeds the alarm threshold.
In case of damage, the gas detector is able to signals the malfunction,
illuminating in fixed way the yellow led and activating a sound alarm with
two seconds’ of intermittence.
In case of alarm the SE235K detector illuminating the red led and after
20 seconds the buzzer emits a sound alarm and the relay activates.
Attention: the installation and the out of service of the instrument
must be done by skilled personnel only.
The gas detectors SE235KM and SE235KG mus be installed in-
stalled and positioned according to all national standards for electri-
cal systems ( with danger of explosion)and safety standards.
PRODUCT POSITIONING:
The SE235KM and SE235KG must be positioned vertically with the
sensor downwards (Fig.1).
SE235KM: it must be installed 20-30 cm from the ceiling (methane is
lighter than air).
SE235KG: it must be installed 20-30 cm from the floor (LPG is heavier
than air).
INSTALLATION PROCEDURES
The detectors SE235KM and SE235KG are gas detector of methane
and LPG gas, that warns with an optical and acoustic signal, the pre-
sence of gas in the environment.
They are planed to be functioning as detected gas with relay exit.
The detectors are calibrated to detect gas up to 10% of the L.E.L. (Low
Explosion Limit), this threshold can change in base of the environmen-
tal conditions but it will not gets over during the first 4 years working, the
15% LEL, after that period the instrument have to be put out of order or
re-send to manufacturer firm for a complete substitution of the device.
With that aim, the package is provided with a printed label on which
have to be indicated the maturity of correct working period (4 years from
installing date); this printed label have to be compiled by who makes
the installation.
INSTALLATION
Mod.
SE235KM
SE235KG
Power supply
230Vac-50/60Hz
230Vac-50/60Hz
Gas detected
METHANE
LPG
The gas detector has inside a jumper that permits to select the type of
electro-valve to connect that can be Normally Opened type (Fig. 3) or
Normally Closed type (Fig. 4).
We remind that the valve should be installed on the gas pipes outside
the room under control, since protection is useless if a gas leak occurs
at the beginning of the gas pipe.
ELECTRO-VALVES CONNECTION
Positioning N.O.: proper for normally opened valves.
Positioning N.C.: proper for normally closed valves or for the
contemporaneously check of both electrovalve and an external
electrical charge.
12
English
GAS DETECTOR WITH RELAY
SE235KM / SE235KG
Unscrew the 4 screws with the aid of a screwdriver.
The box cover has to be positioned on the three form
point or on the wall, by using the screws and plugs
available.
For fixing the dowels, pierce the wall with a tip of 5
mm diameter.
POWER SUPPLY
Attention: the electrical connection has to be done with an under
track cable. The gas detector have to be powered at 230Vac-50/60Hz
by the terminals Land N (Fig. 2). It has to be provided with an device,
to be disowned from the detector and the feeding net, with minimun
3 mm contact distance in accordance wit has written in the European
Standard EN 60335-1.
ELECTRICAL CONNECTION
IP65
Fig.1
FIG. 2 230Vac-50/60Hz
SE235
NC COM NO
L N
T: 09 636 1401 | E: [e-mail] | W: systemcontrol.co.nz
In support of our policy of continuous product improvement we reserve the right to change materials and specifications without notice.
Drawings, where used, are not to scale. All dimensions are in millimetres and sizes given are approximate. Where possible, technical MSDS
data sheets are made available on the website. All products should be installed and used in accordance with manufacturer’s instructions
provided. Warning: products may be the subject of registered designs and patents. Refer to website for terms and conditions on warranty.

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
In case of alarm:
1) extinguish all naked flames.
2) turn off the gas supply at the gas emergency control and/or, with
a LPG supply, the storage tank.
3) do not switch on or off any electrical lights. Do not activate any
electrically powered devices.
4) Open both doors and windows to increase room ventilationIf the
alarm stops, it is necessary to identify the alarm reason and act
accordingly.
If the alarm condition continues and the cause of the leak is not
apparent and/or cannot be corrected, vacate the premises and im-
mediately notify the gas emergency service.
WARNING!
For the cleaning, use an cloth on the top. Not be opened, it could
cause damage.
Note that the sensor employed has a good resistance towards prod-
ucts such as sprays, detergents, alcohol, glues and paints.
However, these products could contain substances which, if in great
quantity, could interfere with the sensor and cause false alarms.
We recommend to ventilate the room should products like these be
used.
Note that the detector is not able to detect gas leaks occurring outside
the room where it is installed, neither inside walls nor under the floor.
To make gas (methane and LPG) nose identifiable, gas is added with
a particularly disturbing smelling substance.
Small gas quantities coming out from left open cookers for some min-
utes do not cause the gas detector alarm signalling even if it is clearly
nose perceptible; in fact the quantity of gas presents in the environ-
ment can be under the alarm threshold.
Please remember that the gas detector cannot work without power
supply.
3
OPERATIONAL WITH NORMALLY OPENED VALVE (N.O.)
FIG. 3
OPERATIONAL WITH NORMALLY CLOSED VALVE (N.C.)
LOWER EXPLOSIVE LIMIT (L.E.L.)
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 danger for
which protection the gas sensor is installed, this is inapplicable.
As an example, the supply of gas from the normal home kitchen equip-
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.
FIG. 3
CONTROLLO FUNZIONAMENTO - (TEST)
After the installation it is possible to check the correct
operational of the instrument by pushing for at least 2
seconds the TEST button on the board, in this way all the
leds will be alight, the acoustic alarm and both relays will
be on for 5 second.
At this point it will be necessary to rearm the electro valve
connected.
230Vac-50/60Hz
SE235
NC COM NO
L N
FIG. 4
230Vac-50/60Hz
SE235
NC COM NO
L N
Normally Close
Valve
Normally Open
Valve
At this point it will be necessary to rearm the electro valve connected.
It is also possible to add a second TEST button simply by connecting
a new button to the terminals of (Fig.5).
The new TEST button will then be positioned at your convenience.
FIG. 5
SE235
NC COM NO
L N
TEST
T: 09 636 1401 | E: [e-mail] | W: systemcontrol.co.nz
In support of our policy of continuous product improvement we reserve the right to change materials and specifications without notice.
Drawings, where used, are not to scale. All dimensions are in millimetres and sizes given are approximate. Where possible, technical MSDS
data sheets are made available on the website. All products should be installed and used in accordance with manufacturer’s instructions
provided. Warning: products may be the subject of registered designs and patents. Refer to website for terms and conditions on warranty.

The manufacturer firm reserves the right to make any aesthetic or functional modification to the without prior notice at any time.
56
Dis.0534058 Cod. 2.710.3009
Made in Italy
TECHNICAL CHARACTERISTICS
- Power supply: 230Vac, 50/60Hz - 4,6VA.
- Power dissipation: 20mA max.
- Operation temperature: -10°C…… +40°C.
- Relative humidity: 30%…… 90%.
- Duration of the sensor: 4 years.
- Dimensions: 187 x 80 x 67mm
- The operative level to intervene at an concentration of the 10% of the
L.E.L. (the lower explosion limit) of the gas.
Intentional delay of the starting connection to the instrument :
1 minute approximately.
- Intentional alarm and relay time delay: about 20 seconds.
- Electronic auto-diagnosis with signalising of eventual abnormalieties.
- Grade of protection: IP65
SALES CONDITION
THE PRESENT CERTIFICATE IS THE ONLY DOCUMENT TO HAVE THE RIGHT OF
REPARATION OF DEVICE IN WARRANTY
• The product is warranted for 24 month from purchase date.
• Any damages caused by tampering and incorrect use or installation will be
not covered by warranty.
• The warranty is valid only if is full compiled.
• In case of defects covered by warranty, the producer will repair or replace
the free product.
PERFORMANCES OUT OF WARRANTY:
When warranty’s terms are spent, the eventual reparations will debited in ac-
cording to the replaced parts and to the hand costs.
WARRANTY CERTIFICATE
COMPILE AND SEND IN CASE OF DAMAGE.
DEVICE:
SE235KM SE235KG
Serial number (s.n.)___________________________________________
DEALER
Stamp:
Date of purchase:
________/________/________
USER
Surname and name____________________________________________
Address______________________________________N°_____________
City_________________________________________________________
Telephone____________________________________________________
TO COMPILE BY THE INSTALLER:
Installation date ______________________________________________
Substitution date _____________________________________________
Installation local ______________________________________________
Instruments’ serial number ______________________________________
(to read on the internal part of the plastic involucres)
Stamp
Sign ______________________________________________________
GECA Srl
Via E. Fermi, n°98 25064 Gussago (BS)
Italy Tel. [phone]
www.gecasrl.it
Tecnocontrol Srl
Via Miglioli, n°47 20090 Segrate (MI)
Italy Tel. [phone]
www.tecnocontrol.it
Order Information
Part No.
GEC-235KG
T: 09 636 1401 | E: [e-mail] | W: systemcontrol.co.nz
In support of our policy of continuous product improvement we reserve the right to change materials and specifications without notice.
Drawings, where used, are not to scale. All dimensions are in millimetres and sizes given are approximate. Where possible, technical MSDS
data sheets are made available on the website. All products should be installed and used in accordance with manufacturer’s instructions
provided. Warning: products may be the subject of registered designs and patents. Refer to website for terms and conditions on warranty.