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8.2 EWS Zone Control Panel
8.2.1 EWS Zone Control Switches and Indicators
The control switches allow any of the four audio channels (BGM, PA Alert or Evac) to be switched to
any of the zones. The Control Switches are inhibited when the EWS is in the AUTOMATIC state.
Pressing any of the control switches for an evacuation zone shall automatically cancel the previous
selection for that zone, i.e. only one audio channel can be assigned to a zone at any one time.
For each evacuation zone there is a set of control switches and associated indicators:
➢ CANCEL -
➢ PA -
➢ ALERT -
➢ EVAC -
8.2.2 EWS Zone Fault
EWS Zone Fault indicator will flash when a fault is detected by the MAIN EQUIPMENT on any of the
wiring or components associated with that zone, and go steady when the fault is acknowledged.
8.2.3 Alarm Origin
Alarm Origin indicator will flash when an input, i.e. FACP or EAID associated with that zone, has been
activated and go steady when the alarm is acknowledged.
Fault and Alarm indicators are NOT inhibited by any key-switch operation.
8.2.4 Zone Labelling
Refer to Appendix A.
Figure 5: EWS Keypad
Control only
Control switch and indicator
Control switch and indicator
Control switch and indicator
MAN1813-9
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