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APPENDIX
1
ALARM VERIFICATION
Alarm verification provides FireFinder-XLS with a way to verify an alarm from area-
type addressable smoke detectors connected directly to the intelligent DLC loop or
the analog MLC loop. Alarm verification can also be enabled for addressable HZM or
CZM devices, providing initiating loops to conventional non-addressable detectors.
This feature reduces the incidence of false alarms. Alarm verification is only appli-
cable to detectors that do not contain an integral alarm verification feature provided
by Application Specific Detection (ASD). You can select alarm verification for none, all
or any combination of addressable smoke detectors or Conventional Zone modules.
The alarm verification cycle on each device is independent from alarm verification
cycles on the other devices.
Addressable detectors connected to DLC / MLC loops indicate that an alarm condi-
tion has been detected. If a device is subject to alarm verification, the DLC / MLC
module alerts the control panel that the device has entered verification but is not yet
considered to be in alarm. The DLC / MLC starts a timer using the FireFinder-XLS
system Retard-Reset Period programmed in the Zeus tool allowing conditions at the
device to stabilize.
Devices connected to the HZM / CZM-1B6 behave in a similar manner, but unlike
addressable devices they must be powered down and re-powered as shown in the
RETARD-RESET-RESTART PERIOD in the alarm verification timing diagram.
When the RETARD-RESET-RESTART PERIOD timer expires, the DLC / MLC begins
the fixed 60-second alarm confirmation period. If the device is no longer in alarm
during the confirmation period, the verification cycle is considered complete and
detection of a subsequent alarm from that device results in the verification cycle
restarting. If the device still reports in the alarm state during this confirmation period,
the alarm condition is reported to the control panel and the system annunciates the
alarm condition.
Alarm verification shall not be used in initiating device circuits intended for cross-
zone operation.
See the figure on the following page for a graphic illustration of alarm verification.