Page 3
34 mm
50 mm
Embedded box 503
70 mm
1
0
5
mm
5 mm
1
5
0
mm
84 mm
115mm
1) MAINS connected indication LED. When the unit turns on, this LED blinks and a test of the gas detection
sensors’ efficiency status is carried out. This phase takes about 100 seconds. Afterwards the LED stays on
without blinking. During the test period, the CHCO does not detect the gas.
2) FAULT indication LED. If this LED turns on, it means that one of the gas detection sensors is not working
efficiently and must be replaced in an authorized centre.
A relay is connected to the fault circuit as well as the light indication and a “cricket” siren.
3) CO ALARM indication LED. This LED will light up when the gas concentration level has reached the 300ppm
concentration, or when the accumulation level is reached. The relay contact is closed, and an impulsive sound
is issued.
4) Explosive GAS ALARM indication LED. This LED will light up and blink when the gas concentration level has
reached 10 % of LEL. The relay contact is closed, and an intermittent sound is issued.
5) Electrochemical Cell sensor for Carbon Monoxide detection
6) Catalytic sensor for Methane explosive gas detection.
7) TEST button. This button is used to simulate a gas leak, after installation.
8) Identification label, serial number and manufacturing year, located under the ABS small dome.
9
) Label of the gas sensor expiration date.
This label must be applied by the technician during the installation
and remembering that the gas
sensor must be reviewed after 5 Years.
Components and commands
Applicare Etichetta
di scadenza
BUZZER
