APPENDIX-D: ALARM VERIFICATION
A - Smoke detector goes into alarm. (LED on device turns to red)
AB - Retard Period, FACP senses detector in alarm and delays alarm signal for 50s. In this
period, no alarm event reports on FACP.
BC - Confirmation Period, Detector is operational for alarm at point B. If detector is still in alarm
at point B, FACP will report alarm. If detector is not in alarm, system returns to standby. If the
detector re-alarms at any time during the confirmation period the FACP will alarm. The period
length is 60s.
CD – Restart next alarm verification period if new alarm occurs.
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