delay period occurs between the time the Low Alert level is exceeded and the fans activate,
and between the time the target gas concentration drops below the Low Alert level and the
fans turn off. While the delay is in progress, the appropriate alert indicator will blink short-on-
long-off as the time proceeds toward zero.
The detector is shipped from the factory with the Low Alert concentration set at position 3, (see
page 7), and the delay set at 3 minutes. These settings provide a good starting point and will
be acceptable for most installations. If the target gas concentration appears to continue rising
after the fans activate, fine tune the settings by reducing the Low Alert setting or the activation
delay. If the fans operate too often and/or for short periods, increase the activation delay.
In some cases, you may find that a target gas source is too close to the detector. Consider
other mounting locations for the detector, or move the gas source farther away.
IOM01
Rev 1.0 – December 22, 2020 29
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