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Display Shows... It Means...
30 Developing CO problem. Display will
(or higher) only show levels of carbon monoxide
30 ppm or higher.
70 The unit is calibrated to sound an alarm
(or higher) before 240 minutes have passed when
exposed to this level.
150 The unit is calibrated to sound an alarm
(or higher) before 50 minutes have passed when
exposed to this level. At this level, an
average healthy adult may feel a
headache within 90 minutes.
400 The unit is calibrated to sound an alarm
(or (higher) before 15 minutes have passed when
exposed to this level. This level may be
life threatening to a normal healthy
adult within three hours.
A number higher Over 450 ppm has been detected.
than 450 Evacuate immediately!
USING THE SILENCE FEATURE
NEVER disconnect the power to your CO Alarm
to silence the horn—use the silence feature.
Disconnecting the CO Alarm removes your
protection! See previous page for details on
responding to an alarm.
The Silence feature is intended to temporarily silence
your CO Alarm’s alarm horn while you correct the
problem—it will not correct a CO problem. While the
alarm is silenced, it will continue to monitor the air for
CO.
When CO reaches the “Alarm” level, it will
sound— repeating horn pattern: 4 beeps, a pause, 4
beeps, etc. Press and hold the Test/Silence button
until the horn is silent. The Silence cycle will last
approximately 4 minutes.
To silence an interconnected series of Alarms, you
must press the Test/Silence button on the initiating
alarm (the unit with the flashing red light). If you press
the Test/Silence on any other Alarm, it will only
silence that unit, not the whole interconnected series.
NOTE: After the 4-minute silence cycle, the CO Alarm
re-evaluates present CO levels and responds accord-
ingly. If CO levels remain potentially dangerous—or
start rising higher—the horn will start sounding again.
While the CO Alarm is silenced:
If the CO Alarm...is silent for only 4 minutes, then starts
sounding loudly—4 beeps, then a pause, 4 beeps, then
a pause. Red light (LED) continues flashing...
This means...CO levels are still potentially dangerous.
If the CO Alarm...remains silent....
This means...unit has returned to normal operation.