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Year 2010
1
2
3
5
6
8
4
1 2
ON
7
9
1 2 3 4 5 6 7 8
GS920
Methane
10
Replace
2014
S.N. 12472
Year 2010
Components and commands
1) MAINS connected indication LED. When the green LED is blinking, the GS920 performs a test of
the sensor’s efficiency status, and gets it to the functioning temperature. This phase lasts about 60
seconds. At the end, the LED stops blinking and the green light remains ON.
During the test period, the GS920 does not detect the gas.
2) FAULT and functional life wear indication LED.
If this LED turns on, it means that the gas detection catalytic sensor is not working efficiently and
must be replaced by an authorized technician.
The sensor duration is guaranteed for 6 years (in clean air). After six years, the yellow LED will start
a quick blinking. You will hear a short beep every hour.
3) ALARM indication LED. This LED turns on when room gas concentration exceeds the danger level,
at 10% of L.E.L.
4) Micro switches:
Switch 1: Positioning the switch to ON – Intrinsically safe operation – the relay is excited at the
end of the latency time and switches on each alarm.
Positioning the switch to OFF – Normal operation – the relay switches on each alarm.
Switch 2: Positioning the switch to ON, the relay is set to impulse functioning. Each pulse lasts about
30 seconds.
Positioning the switch to OFF, the relay goes in continuous functioning mode, until the gas threshold
drops under the danger level.
5) Catalytic sensor for Methane or LPG explosive gas detection.
6) TEST button. This button is used to simulate a gas leak, after installation.
7) RESET button. This button is used to stop the alarm, when triggered by an EARTHQUAKE.
8) Identification label, registration number and manufacturing year, located under the ABS small
dome.
9) TEST POINT for testing. It is used in the laboratory or by a qualified technician.
10)
Label of the gas sensor expiration date.
This label should be applied by the technician during installation, keeping in mind that the detector
should be overhauled after 5 years.
