GENERAL DESCRIPTION
The detectors are gas detector of methane and LPG gas, that warns
with an optical and acoustic signal, the presence 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
environmental 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.
1-4m
30cm
max
Avoid installing:
Directly over the sink or the gas device
In little locals where can be utilised alcohol, ammonia, spray bottles
of gas or other substances with flying solvents.
In low ventilated environments
Near to walls or obstacles that can stop the gas flow from the user to
the detector, or near to exhausters or fans that can divert the air flow
In environment in which the temperature can arrive over 40°C or under
–10°C
In environment with a lot of humidity or vapours
30cm
max
1-4m
Methane Detector L.P.G. Detector
INSTALLATION PROCEDURES
By using an screwdriver unscrew on the right hand side the instrument
and uncover it. (Fig.1)
The box cover has to be positioned on the three form point or on the
wall, by using the screws and plugs available. For installing the dowels
drilling the wall with a 5mm drill.
ELECTRICAL CONNECTION
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 1 and 2 (Fig. 2)
It has to be provided with an device, to be disowned from the detector
and the feeding net with minimun 3mm contact distance in accordance
with as written in the European Standard EN 60335-1.
Fig.1
LUMINOUS AND ACOUSTIC SIGNALISATIONS
The gas detector is 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 detector illuminating the red led and after 20
seconds the buzzer emits a sound alarm and the relay activates.
LIGHTING DELAYS
The catalytic sensor presents in the 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.
CHARACTERISTICS OF THE EXIT-SIGNAL
The detector is provided with an external relay with free tension
contacts, capacity of connection 8A 250Vac / 30Vcc.
English
MadeMade
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INSTALLATION
Attention: the installation and the out of service of the instrument
must be done by skilled personnel only.
The installation of gas and the possible stopping device must be in
according to the national and in force prescriptions law.
DETECTOR POSITIONING
The instrument have to be installed:
the gas detector for methane should be fixed at a maximum distance
of 30 cm from the ceiling; the gas detector for LPG should be fixed at
a maximum distance of 30 cm from the floor.
They should be fixed at a distance comprises from 1 meter and 4
meters by the gas device (kitchen, boiler room, etc…)
Possibly in every room in which there is a gas device and, in the
residences with more that one floor, at least one for each floor.
This document refers to gas detected: mod. GAMMA 652-O series marked GECA.
GAS DETECTOR
FOR DOMESTIC INSTALLATION
series GAMMA mod. 652-O/M
series GAMMA mod. 652-O/G
230Vac - 50/60Hz
1
2
Fig.2
652-O/M 230Vac-50/60Hz METHANE
652-O/G 230Vac-50/60Hz L.P.G.
Item Detected gas Power supply
PERIODICAL TESTING
We recommend to contact the installer at least once a year for a
general verification
IMPORTANT: Do not use pure gas, such as a lighter, directly on the
sensor since the sensor could be irremediably damaged.
WARNING!! 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 ventilation
If 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
immediately notify the gas emergency service.
ELECTRO-VALVES CONNECTION
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.
OPERATIONAL WITH NORMALLY OPENED VALVE (N.O.)
OPERATIONAL WITH NORMALLY CLOSED VALVE (N.C.)
OPERATIONAL CHECK
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
the relay will be on for 5 second. At this point it will be necessary to
rearm the electro valve connected
.
Fig.3
Fig.4
9 9 2
Positioning N.O.: proper for normally opened valves
Positioning N.C.: proper for normally closed valves or for
the contemporaneously check of both electro-valve and
an external electrical charge.
Normally opened
manual resetting valve
Normally closed
manual resetting valve
230V/50Hz
NO
C
NC
1 2 7 8 9
992
230V/50Hz
NO
C
NC
1 2 7 8 9
992
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
products 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
minutes do not cause the gas detector alarm signalling even if it is
clearly nose perceptible; in fact the quantity of gas presents in the
environment can be under the alarm threshold.
Please remember that the gas detector cannot work without power
supply.
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
equipment.
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 m
3
, 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
nozzle 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
evident the serious danger situation even when the natural gas
saturation is still too little to allow the explosion.
230Vac-50/60Hz
230Vac-50/60Hz
TECHNICAL CHARACTERISTICS
- Power supply 230Vac-50/60Hz
- Power dissipation 20mA max
- Operation temperature -10°C…. +40°C
- Humidity 30%…. 90%
-Duration of the sensor: 4 years
- Alarm intervention calibrated to detect gas up to
10% of the L.E.L.(Low Explosion Limit).
- Time delay at switching on about 1 minute
- Alarm and relay time delay about 20 seconds
- Acoustic signalisation 85 dB (A) in 1 meter
- Electrical self-diagnosis signal for eventual abnormalities
- Rated to IP42
- According to Standard CEI UNI EN50194-1:2009
The manufacturer firm reserves the right to make any aesthetic or functional modification to the without prior notice at any time.
Tecnocontrol Srl
via Miglioli, n°47
20090 Segrate (MI) Italy
Tel. +39 02 26922890
www.tecnocontrol.it
GECA Srl
via E.Fermi, n°98
25064 Gussago (BS) Italy
Tel. +39 030 3730218
www.gecasrl.it
dis.0134182 cod. 2.710.1508 Made in Italy
TO BE COMPILED BY THE INSTALLER:
Date of installation _________________________________
Date of replacement ________________________________
Site of installation __________________________________
Serial number (s.n.) ________________________________
(Written on the inside of the plastic container).
Stamp
Signed ________________
GUARANTEE CERTIFICATE
TO COMPILE AND SEND IN CASE OF DAMAGE
DEVICE: GAMMA 652-O/M GAMMA 652-O/G
Serial number
(s.n.)______________________________________________
DEALER
Stamp: Date of purchase:
_____/_____/_____
USER
Surname and name
__________________________________________________________
Address __________________________________ n°______________
Postcode ________________ Town/city _________________________
Telephone__________________________________________________
GENERAL TERMS OF THE GUARANTEE
THIS CERTIFICATE IS THE ONLY DOCUMENT THAT ENTITLES
YOU TO REPAIR OF THE PRODUCT UNDER THE TERMS OF THE
GUARANTEE.
- The product is GUARANTEED for a period of 24 months from the date of
purchase.
- The GUARANTEE does not cover damage caused by tampering, incorrect
or improper use and installation.
- The GUARANTEE is valid only if it is duly compiled.
- In the event of defects covered by the GUARANTEE, the manufacturer
will repair or substitute the product free of charge.
SERVICING AFTER THE GUARANTEE PERIOD:
Any repairs after the period of the GUARANTEE will be charged on the
basis of the parts substituted and the cost of labour.
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