Aico Carbon Monoxide Alarm Ei 225EN - Manual (Page 9)

Table B shows how the CO Alarm reacts to different levels of CO gas and exposure time.
At higher levels of CO the alarm turns on sooner. The rate of flashing of the red light
indicates the level of CO.
Table B: CO Alarm Response
* unless it has been in alarm (see CO Alarm Memory below)
If your CO Alarm sounds follow the instructions on page 4.
When ventilation is provided by leaving the window and doors open, the CO build up
may have dissipated by the time help arrives and the alarm may have stopped
sounding. Although your problem may appear temporarily solved it is crucial that the
source of the CO is determined and appropriate repairs made.
NEVER IGNORE THE ALARM.
Pre-Alarm: When the alarm detects over 50ppm CO the red light flashes every 2
seconds. This helps locate CO leaks, as the unit gives an indication straight away.
9
CO Level
ppm
Horn On
within
Red
Alarm Light
0 ppm
50ppm
100 ppm
300 ppm
Off
60 to 90 minutes
10 to 40 minutes
3 minutes
Off *
1 Flash / 2 Seconds
4 Flashes / 2 Second
8 Flashes / 2 Second