Page 5
Turn on and testing
30 cm
m a x
1-4 m
30 cm
m a x
1-4 m
N O !
N O !
Detector Gas
METHANE
YES
Detector Gas
LPG
Installation measures and positioning
The position of the detector is a crucial factor for its correct functioning during gas detection.
In order to obtain the maximum results from a device and minimize the probability of false alarms,
it is recommended to follow this scheme and keep in mind the following general regulations.
The detector must be located at different heights, according to the type of gas. These heights are:
- 30 cm from the lowest point of the floor in order to detect
heavy gases, LPG, etc.
- 30 cm from the highest point of the ceiling in order to detect
light gases, Methane
- The detector should not be placed near the appliances to be controlled (boilers, burners, industrial
kitchens, etc.) but on the opposite wall.
- The detector should not be affected by smoke, vapour, etc. as they could distort its measurement.
It should be located away from sources of heat, ventilators or fans.
It must not be installed, on a wall in plasterworch.
It must be installed only on walls in masonry
Once the device has been turned on, the MAINS LED will start blinking for about 60 seconds, after
which it will remain ON. Now the GS920 is ready for detection of explosive gas.
After 24 hours from installation begin the self-learning antiseismic period (from this time the detector
MUST NOT be moved from the installation position for any reason).
After 10 days, the self-learning period is finished and the device is capable to detect seismic
movement.
Testing
Press the button near the detection capsule to simulate the presence of gas.
The ALARM LED lights up, and the relay shifts its functioning mode after 5 seconds. After the
alarm, the LED will turn off, the buzzer will stop, and the connected appliances will be turned off.
To complete the general test, issue gas from a pre-calibrated aerosol within 20% of L.E.L. Testing
using a common cigarette lighter could damage the sensor. This test should be carried out at least
once a year.
