7
G 521 - RFG 361
C1 Eng.
25.11.08 MZ
Rev. 02
We reserve the right to make changes without notice
COSTER
10. TESTING
• Power the device: LINE LED (4.
2
) lights and FAULT LED (4.3) and ALARM LED (4.
4
) flash..
• After 1.5…2 minutes the detector is ready to acquire alarms and the LEDs FAULT (4.
3
) and ALARM (4.
4
) should
go out.
• Position the SENSITIVITY knob (4.
1
) on “0”..
• Since the sensors are selective, and so not influenced by gases other than that for which they are dedicated, to
simulate a gas escape it is necessary to use small gas cylinders containing specific gases at preset concentra-
tions, releasing the gas as near as possible to the detecting sensor.
Only for sensors for detecting propane (LPG) can gas from a normal cigarette lighter be used
• When the gas concentration exceeds the pre-alarm threshold the ALARM LED (4.
4
) flashes.
• With a delay (about 20 seconds) after exceeding the alarm threshold::
– ALARM LED (4.
4
) lights and stays lit. ,
– the internal alarm and the outside warnings are switched on (only if without jumper M-F1)),
– operational relay closes gas shut-off valve or switches on aeration fan.
• Stop erogation of gas. When gas concentration on the sensor returns below threshold level:
– if detector is “without latching” (with jumper between F3-F4), alarm ceases and ALARM LED (4.
4
) remains
with slow flashing until RESET button (4.
5
) is pushed.
– if detector is “with latching” (without jumper between F3-F4), alarm remains until RESET button (4.
5
) is pres-
sed for at least 5 seconds.
• If detector controls a valve with manual reset, it is necessary to re-open manually also the valve.
11. WARNING: IN EVENT OF ALARM!!
Combustible gases (methane and propane (LPG)
First of all it must be remembered that, in regard to the combustible gases methane and propane (LPG), most people
are able to be aware of their presence even at concentrations below the alarm level set for the detector, so that this
situation does not mean that the device is faulty and does not necessarily indicate a dangerous situation.
Carbon monoxide (CO)
Carbon monoxide (CO) is produced by the incomplete combustion of any apparatus which, in order to burn, has
to use the oxygen present in the air of the space in which it is installed.
It is absolutely without odour and so it is impossible to detect its presence: this makes it extremely dange-
rous.
The only means of being aware of the presence of carbon monoxide (CO) is, therefore, a gas detector.
What to do
For the reasons given above, and since you do not know instinctively what type of gas may have brought about a
dangerous situation, if the detector sounds the alarm, the following action should be taken:
– turn off any open flames,
– turn off all the devices running on gas,
– do not operate electric switches (since they could cause sparks),
– for methane, close the main valve of the gas supply,
– for propane (LPG) close the valve on the pipe coming from the storage tank,
– it is strongly recommended in every case, but above all in the presence of carbon monoxide (CO), to open win-
dows and doors to ventilate the spaces.
