4
O P E R AT I O N
S i c u r g a s
PULSE RELAY, WITH CURRENT STARTING TO
COMMAND A NORMALLY OPEN NO MANUALLY
RESET VALVE (JUMPER UP)
The connection guarantees shutting off the
gas flow when the intended gas concentration
threshold is exceeded
USE OF SEVERAL SICURGAS APPLIANCES TO
CONTROL SEVERAL ROOMS WITH ONE GAS VALVE
Example of connection of several Sicurgas
appliances with STABLE RELAY controlling the
same normally closed NC valve and an additional
external siren. The contacts must be connected in
SERIES
Example of connection of several Sicurgas
appliances with PULSE RELAY controlling the
same normally open NO valve. The contacts must
be connected in PARALLEL.
Sicurgas is equipped with a TEST/SILENCING key in order to check the system or to inhibit the alarm. This
key is activated by a cord for P21 natural gas (installed 30 cm from the ceiling) or by a button on the body of
the appliance for P22 LPG (installed 30cm from the floor).
To test the system, press theTEST/SILENCING key for 10 seconds. This activates the control procedure
lasting 30 seconds during which all the system components are checked.
Inhibiting the alarm avoids the unintentional triggering of the detector. In fact like all sensors on the market,
the Sicurgas sensor, though being very selective, can also be triggered by other types of substances, such
as vapours of alcohol, wine, etc.
For example when using wine for cooking, the detector could trigger an alarm. To avoid this problem, press
the TEST/SILENCING key for at least 3 seconds.
After pressing the silencing key, the alarm will not go off for 10 minutes: the buzzer does not ring, the relay
5
6
INSERT THE SUPPLY VOLTAGE
(230Vac 50Hz).
CHECKING THE SYSTEM AND ALARM
SILENCING
OPERATION
Sicurgas enters a preheating phase and stabilises
the sensor for a maximum of 3 minutes the first
time the detector is switched on and after every
power failure. During this phase, the red and green
LEDs flash alternately indicating that the device is
not ready for gas detection. After this phase, only
the green light will remain on.
test/silencing key
(cord for P21)
L
N
230Vac - 50Hz
6 7
L
N
230Vac - 50Hz
L
N
230Vac - 50Hz
NO
NO
NC
Summary of Contents for P21
Page 6: ...6 S i c u r g a s...
