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3-2.5.8
3-2.5.8.1
August 2013
CONCURRENT STATES
It is possible for the ARIES system to be in more than one of the event-driven,
Off-Normal Mode states concurrently. In general, any new event, regardless of its
type, is prioritized for immediate display, and the control unit's application
program runs to activate the outputs, if any, associated with the new event. The
ARIES's hierarchy for displaying events will determine whether the details
associated with the new event will continue to be displayed after acknowledgment
or whether its display will be suppressed due to the presence of other higher-
priority events.
The general hierarchy for the display of events is as follows:
•
Alarm
•
Pre-Alarm
•
Supervisory and Trouble
Alarm Events
An alarm event is a signal indicating an emergency situation that requires
an immediate response. However, there are varying degrees of alarm
signals, depending on whether the system's primary objective is property
protection and mission continuity or whether it is occupant notification and
building evacuation.
1. Property Protection/Mission Continuity Alarm Events
A property-protection/mission continuity system is usually installed
to suppress a fire in the area that it is protecting. Waterless fire-
suppression systems typically progress through multiple, sequential
alarm states before the extinguishing system is discharged. The
automatic detection system is either crossed-zoned or arranged in a
counting zone to ensure that a flaming fire is present at the time of
extinguishing-system discharge and for added reliability.
The typical alarm stages of a ARIES System designed for property
protection/mission continuity are summarized in Table 3-7.
Note: There must be at least two detectors in the protected area when
either crossed-zoned or counting-zone automatic detection is used.
3-110
P/N 06-236530-001
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