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14
Alarm Types
In case of a fire, Analogue detectors (sensors), conventional smoke and/or heat detectors,
manual call points and programmable inputs can generate fire alarm
A fire alarm could be an Alert Annunciation alarm, i.e. the activation of routing equipment
(Fire Brigade TX) is delayed during the acknowledgement and investigation time.
The Analogue detectors can also generate other types of "alarm", i.e. Pre-warning, Heavy
smoke alarm / Heavy heat alarm and a two-unit / zone dependent alarm point / zone
generating a Co-incidence alarm.
Quiet alarm is an alarm type that can be used for AS1668 fan control and other
applications that require a non-latching / non-brigade call alarm.
LAAF alarm
function and normally used to control the brigade call alarms. If the LAAF function is used,
during the acknowledgment and the investigation periods, there will be an indication in the
FDCIE display and the Fire Brigade TX will be delayed. The LAAF function requires a Local
Alarm Acknowledgement Unit (LAAU 4445), a smoke detector (sensor) 4300/4400 or
4301/4401 and sounder base 3379. During the Acknowledgement Period and the
Investigation Period respectively, there will be an indication in the FDCIE display.
FT128 can handle and present up to 256 fire alarms (alarm points and/or zones). Zone
numbers 01-99 can be used and in each zone the alarm point (address) numbers 01-99
can be used. The fire alarms will be shown in FT128 display, Alert Annunciation unit 1736
and External Presentation unit 1728.
Acknowledged and Isolated alarm are fire alarm functions used only in New Zealand
convention.
Note: In the following chapters, all different alarm types are described. The illustrations
in this document show the essential information and may not look exactly as shown in
the display.
14.1
Pre-Warning
Activation of Pre-warning is an option that has to be enabled (via EBLWin) for the control
unit.
An Analogue detector generates a pre-warning at a lower alarm level than the fire alarm
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level
Pre-warning can be used when an early alarm and/or an early action is required
(e.g. a "soft" computer shut down). Normal alarm devices (output type "Alarm devices"),
routing equipment, etc. will not be activated.
In case of a pre-warning, the following will occur:
•
The buzzer in FT128 sounds 0.8 sec. each 5
•
Outputs programmed for pre-warning are activated
•
On the first row in the FT128 display, the presentation number (zone-address) is
shown (for the first pre-warning).
•
On the second row, an alarm text (= the fire alarm message) will be shown (if
programmed).
Example; pre-warning zone 12, address 45 (within zone 12):
34
In the New Zealand convention only, a Fire alarm (ALM) can be "changed" to an Acknowledged alarm (ACK) or an Isolated
alarm (ISO).
35
This function is normally used for smoke detectors only.
36
LAAF is the Local Alarm Facility as per the previous model AAF (Alarm Acknowledgement Facility). Local Alarm
Acknowledgement Unit (new unit) is similar to the discontinued Alarm Acknowledgement Module AAM.
37
See FT128 Technical / programming manual. Any programmable input can also be used to activate a pre-warning.
38
Outputs programmed for General pre-warning and outputs programmed for the activated pre-warning(s).
35
36
(Local Alarm Acknowledgement Facility) is similar to the alert annunciation
49
Operation Manual
FT128 Rev 2.4
34
.
th
sec. (0.8 / 5 sec.).
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