B15583/R0/204EN&205EN/U&C 8/6/06 1:54 PM Page 8
3.3 What happens when your CO Alarm detects Carbon Monoxide ?
When the Alarm detects potentally dangerous levels of CO, it flashes the red alarm light immediately and then sounds a loud alarm if the CO persists. Table B below 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
CO Level | Red | Horn On |
ppm | Alarm Light | within |
0 ppm | Off * | Off |
50ppm | 1 Flash / 2 Seconds | 60 to 90 minutes |
100 ppm | 4 Flashes / 2 Seconds | 10 to 40 minutes |
300 ppm | 8 Flashes / 2 Seconds | 3 minutes |
*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.
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