2 APPENDIX
FIREFINDER-XLS INSTALLATION AND MAINTENANCE MANUAL | APPENDIX A
A – Smoke detector goes into alarm.
AB– RETARD-RESET PERIOD (Control Unit) – Control unit senses detector in alarm and retards (delays) alarm signal, usually by de-
energizing power to the detector. Length of time varies with design.
• For detectors on a DLC loop, the period is configurable in the range of 11 to 55 seconds.
• For photoelectric and ionization detectors on an MLC loop, the periods can be configured separately in the range of 10 to 45
seconds.
BC– RESTART PERIOD (Detector Power-up Time) – Power to the detector is reapplied and time is allowed for detector to become
operational for alarm. Time varies with detector design.
• For detectors with alarm verification connected to the DLC, the detector RESTART PERIOD is 0 seconds.
• For detectors with alarm verification connected to the MLC, the detector RESTART PERIOD is 11 seconds.
• For HZM and CZM-1B6, the RETARD-RESET PERIOD is not configurable and RETARD-RESET-RESTART PERIOD time
varies up to a maximum 60 seconds.
AC– RETARD-RESET-RESTART PERIOD – No alarm obtained from control unit. Maximum permissible time is 60 seconds.
CD– CONFIRMATION PERIOD – Detector is operational for alarm at point C. If detector is still in alarm at point C, control unit will alarm.
If detector is not in alarm, system returns to standby at point D. If the detector re-alarms at any time during the confirmation period
the control unit will alarm.
DE– OPTIONAL REGION – Either an alarm can occur at control unit or restart of the alarm verification cycle can occur.
AD– ALARM VERIFICATION PERIOD – Consists of the retard-reset-restart and confirmation periods.
For devices connected to the DLC, the Detector Restart period is 0 seconds.
CAUTION
Use only detectors which are subject to air velocities of less than 100 feet per
minute with alarm verification. Under dynamic air velocity conditions, smoke may
be swept from a smoke detector after the initial alarm. That may cause a long delay
before verification. Do not select alarm verification for such applications.
ALARM VERIFICATION TIMING DIAGRAM
ALARM VERIFICATION PERIOD
RETARD-RESET-RESTART PERIOD -- MAXIMUM 60 SECONDS*
NO ALARM AT CONTROL UNIT
*For installations in Canada and California this time must not exceed 30 seconds.
CONFIRMATION PERIOD -- 60 SECONDS
ALARM REQUIRED AT CONTROL UNIT
OPTIONAL
REGION
A
t=0 Seconds t=n Seconds
B
C
D
E
CONTROL UNIT
RETARD-RESET PERIOD
DETECTOR RESTART
(POWER-UP) PERIOD
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