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Presignal and Positive Alarm Sequence (PAS) Operation
78 AFC-600 Operations PN 51033:A 3/8/99
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This section describes the Presignal and PAS selection, how to do the following:
• View Presignal and PAS selections,
• Respond to an alarm with Presignal
• Operate the control panel with a Presignal Delay Timer only
• Operate the control panel with a Presignal Delay Timer and PAS
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Presignal is a feature that initially causes alarm signals to only sound in specific areas,
monitored by qualified persons, where activating a general alarm requires human
verification. This allows delay of the alarm up to 180 seconds after the start of alarm
processing. The control panel Presignal feature provides two selections:
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• A
Presignal Delay Timer
(60-180 seconds) that delays activation of all outputs
with a CBE that includes Special Zone F0.
• A
PAS
selection, in addition to the
Presignal Delay Timer
, that allows a
15-second time period for acknowledging an alarm signal from a fire detection/
initiating device. If the alarm is not acknowledged within 15 seconds, all local and
remote outputs activate immediately and automatically.
Figure 80 contains an illustration of Presignal and PAS timing.
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