- ENGLISH -
RDXSM10001SE 022949A6 051213
OVERVIEW
This device is designed to detect the presence of Methane
(CH4) and Carbon Monoxide (CO).
The presence of Methane in an interior may be due to a gas
tap left open accidentally or leaks from deteriorated or
defective joints, old pipes or defective burner equipment.
Carbon monoxide, a gas that is extremely toxic for human
beings, is generated when combustion (stove, gas cooktop,
burner) takes place in an environment where insufficient
oxygen is present.
The CO gas sensor consists of an electrochemical cell that is
also sensitive to acetylene, hydrogen and nitric oxide.
Therefore the user must take into account the effect of the
cross-sensitivity of the various gases.
Note:
The carbon monoxide (CO) is a gas whose high
toxicity (it can have severe consequences even
when inhaled in very small quantities) is added to
an extreme danger because it is not perceptible by
people being colourless and odourless.
The user might sense the presence of gas before
the detector does; this happens because the
distribution companies use to add odorizers to
Methane.
This sensation changes a lot from person to person,
and depends on the exposure time.
OPERATION
Commissioning
This detector has a built in delay that prevents the alarm to be
triggered (thus allowing the sensor to heat up) at power on or
when power comes back after a blackout.
As soon as it is powered the sensor will perform a diagnostic
on the internal circuitry (for a short while all three LEDS turn
on) for an electric check; afterwards the sensor will start to
stabilize. After the initial delay (about 1 minute) the green LED
flashes: when it stops flashing and stays steady the sensor is
ready to operate.
Button ' '
This is a multifunction key:
Test function
In order to check the proper operation of the sensor, once the
1 minute stabilization time is completed, just press for 2
seconds the ' ' (test) key, located on the front cover: all
green, yellow and red LEDs turn on, while the buzzer
activates; at the same time also the relay is energised.
Internal buzzer mute function
In case of any fault (see section 'Faults') if the key '
' is
shortly pressed, the internal buzzer is muted until a new fault
should happen.
In the event of an alarm pressing shortly the '
' key results in
its muting for 5 minutes only.
Counter reset function for the Methane module.
See section 'Methane module replacement'.
Carbon Monoxide alarm state
When the CO concentration exceeds the 30 ppm (50 mg/m³)
starts the counting of the intervention time of the device; the
intervention time is variable with respect to at the
concentration: the higher the concentration, the shorter the
intervention time for the alarm.
The intervention time is in compliance with the EN 50291:
SEGUGIO DOUBLE
Code RD XSM1 ---- SE
Via Prosdocimo, 30 I-36061 BASSANO DEL GRAPPA (VI)
Tel.: +39.0424.567842 - Fax.: +39.0424.567849
http://www.seitron.it - e-mail: [email protected]
Alarm state is identified with the red LED turned on steady
together with the continuous buzzer activation and the output
relay energising after ~30 seconds.
The relay can in turn a gas cutoff valve (i.e. a potential in
direct CO cause) and/or a fan for the extraction of the
poisonous air from the room.
While in this state if the key '
' is pressed the buzzer is muted
for 5 minutes.
The Alarm state is self-resetting in case the CO
concentration drops below 25ppm for at least 5 minutes.
Methane (CH4) alarm state
This state is triggered when the device detects a concentration
of Methane gas above 10% L.I.E..
This state is signaled by the red LED flashing quickly, the
internal buzzer with continuous tone and, after ~30 seconds
delay, the activation of the CH4 output relay which, in turn, can
be used to energise the gas cutoff valve (to stop the gas at its
source) and/or starting a fan for a forced ventilation in the
room.
When in this state pressing the '
' results in the buzzer
inhibition (muting) for 5 minutes.
The Alarm state is self-resetting when the Methane
concentration drops below the Alarm threshold level.
Carbon Monoxide (CO) + Methane (CH4) alarm state
When both the CO and Methane alarm states are triggered at
the same time, the detector turns on the red LED steady, the
buzzer with continuous tone and, after about ~30 seconds
delay, energises both relays (CO + CH4) which, in turn, can
be used to energise the gas cutoff valve (to stop the gas at its
source) and/or starting a fan for a forced ventilation in the
room.
When in this state pressing the '
' results in the buzzer
inhibition (muting) for 5 minutes.
The Alarm state is self-resetting when conditions
described in the previous sections ‘Carbon Monoxide
Alarm’ and ’Methane Alarm’ are again safe.
Relay activation
The relay is factory set in such way that, in case of an alarm,
the relays activation is separated, i.e. in case of CO alarm only
the CO relay is energised while in case of CH4 alarm only the
CH4 alarm is energised.
In case the energising of both relays is desired when any of the
alarms is triggered, please move jumper
JP3
into position
A
, as
shown in the next picture:
1
METHANE GAS AND CARBON MONOXIDE
DETECTOR (ACCUMULATION TYPE)
•
230V~ power supply
•
Detected gas: Methane (CH4) and Carbone Monoxide (CO)
•
Methane (CH4) sensor: Semiconductor SnO
2
, replaceable
•
CO sensor: Electrochemical, replaceable
•
Buzzer and relay in case of alarm/fault
•
Alarm test / Alarm mute button
•
Flush mount over 2 modules junction boxes
(square or round shaped)
SIGNAL
FAULT TYPE
n° 1 FLASH
CO module end of life
n° 2 FLASH
Methane module end of life
n° 3 FLASH
CO module end of life
Methane module end of life
n° 4 FLASH
CO module fault
n° 5 FLASH
CO module fault
CO module end of life
n° 6 FLASH
CO module fault
Methane module end of life
n° 7 FLASH
CO module fault
CO module end of life
Methane module end of life
n° 8 FLASH
Methane module fault
n° 9 FLASH
Methane module fault
CO module end of life
n° 10 FLASH
Methane module fault
Methane module end of life
n° 11 FLASH
Methane module fault
CO module end of life
Methane module end of life
n° 12 FLASH
Methane module fault
CO module fault
n° 13 FLASH
Methane module fault
CO module fault
CO module end of life
n° 14 FLASH
Methane module fault
CO module fault
Methane module end of life
n° 15 FLASH
Methane module fault
CO module fault
CO module end of life
Methane module end of life
REPLACEABLE SENSOR MODULES
Carbon Monoxide (CO) module
The replaceable CO module is equipped with a microcontroller
that monitors continuously the residual life of the
electrochemical sensor, and evidencing through the yellow
LED (see section 'Faults'), located on the front cover, when
the module life is at its end and it must be replaced.
In this case read carefully the section ‘CO module
replacement’.
Methane (CH4) module
The Methane module does not include any microcontroller on
its board, so the residual module life is stored in the detector
memory, which constantly checks this parameter; in case the
module has expired and must be replaced the yellow LED is
turned on (see section ’Faults Indication’).
In case of a module replacement a manual reset on the
detector must be performed: please read carefully the section
(Methane (CH4) module replacement).
FAULTS
This device features a self-diagnostics for a continuous check
of the CO module and the whole detector reliability.
The fault condition is evidenced by a short buzzer activation
every 10 seconds, together with the yellow LED flashing in
different ways, as described in the following table.
In case the yellow LED is turned on steady and the internal
buzzer beeps every 10 seconds, the fault is on the detector
board, which must then be replaced.
WARNING:
in case of CO detection alarm:
1) Ventilate immediately the room opening
doors and windows.
2) Turn off any functioning combustion
device.
3) Search and remove the possible cause of
alarm.
4) In case the cause of the alarm is not
immediately removed, vacate the room
and call a qualified technician.
If the alarm stops it is necessary to search
the possible cause and consequently
provide.
WARNING:
in case of Methane (CH4) alarm:
1) Extinguish all fire sources.
2) Close main gas valve (either methane)
3) Do not turn on or off any electrical light;
do not turn on or off any electrical device.
4) Open doors and windows to increase
ventilation.
If the alarm stops it is necessary to search
the possible cause and consequently
provide.
In case the alarm persists and the cause of
the leak cannot be found, vacate the
premises and, from external, immediately
notify the gas emergency service.
CO Concentration
Alarm before
No alarm before
30 ppm
- - - - - - -
120 minutes
50 ppm
90 minutes
60 minutes
100 ppm
40 minutes
10 minutes
300 ppm
3 minutes
- - - - - - -
Separated relays activation,
(factory setting)
Simultaneous relays activation.
JP3 CONNECTOR
A
B
A
B
JP3
