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10.0 Operating the Panel
10.1 Panel Operation During Various Hazard States
The escalating hazard zone states include Idle, Alert, Alarm and Release. They are defined
based on the status of Hazard Area input zone(s), correlated Abort Switch and Manual
Release Switch.
10.1.1 Hazard Idle
• No correlated alarm zone active.
• Release Timer is not started.
• Manual Release Delay Timer is not started.
• Abort Switch is off.
• Manual Release Switch is off.
• Corresponding NAC circuit is off.
• Releasing circuit(s) is off.
10.1.2 Hazard Alert (or equivalently first Alarm in Cross-zoned Application)
The panel enters the Hazard Alert state when
• a single alarm comes in for a cross-zoned hazard. For non cross-zoned hazard area, a
single alarm will put hazard into Hazard Alarm state directly.
• the Abort Switch becomes active during Hazard Alarm state, so that the hazard area
state downgrades from Hazard Alarm to Hazard Alert.
• Release Timer is not started.
• Manual Release Delay Timer is not started.
• Correlated NAC circuit(s) turns on at alert rate.
10.1.3 Hazard Alarm (pre-discharge, or equivalently second Alarm in Cross-
zoned Application)
The panel enters the Hazard Alarm state when
• it detects the confirming alarm for hazard area (single alarm active for the non cross-
zoned system, or 2nd alarm active in the cross-zoned system), or
• Manual Release Switch is active.
• Release Timer (RT) is started when the panel enters Hazard Alarm state after by
detecting the 2nd alarm in cross-zoned hazard or 1st alarm in non cross-zoned hazard.
• Manual Release Delay Timer is started when the panel enters Hazard Alarm state by
detecting the correlated Manual Release Switch active.
• Releasing circuit(s) will be activated after the Release Timer or Manual Release Timer
expires.
• Corresponding NAC(s) turns on at alarm rate.
• During Hazard Alarm State, when the release timer is running and the Abort Switch
turns on, the hazard area state will change from Hazard Alarm to Hazard Alert. Release
Timer is held and the corresponding NAC sounds the Alert rate. If the Abort Switch is
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