VESDA VLC Product Guide
VESDA by Xtralis
10
www.xtralis.com
3.2
VLC Remote Display Module
OK LED
The OK LED stays lit during normal operation indicating the unit is
functioning normally. When this LED is off a warning beep will sound
indicating a Fault condition is active.
Isolate LED
This LED is lit when the detector is Isolated and relay are de-activated
disabling alarm outputs of the detector. A warning sounder will beep every
60 seconds if the display has been programmed to do so.
Alarm Levels
ALERT:
When illuminated this LED indicates that the smoke level is above
the alert threshold. This indicates the detector has identified very early
stages of a fire condition and/or that the smoke level in the area is above
normal.
PRE-ALARM:
When lit this indicates that the detected smoke level has
passed the threshold value fixed for Pre-Alarm, but is not intended to initiate
a general fire alarm response procedure.
FIRE:
When lit this indicates that there is enough smoke to initiate a general
fire alarm response procedure. This indicates a fire may be imminent or is in
progress. When interfaced with a Fire Alarm Control Panel (FACP) it can
generate an automatic fire alarm.
Bar graph
The Bar graph is a 20 step indicator where each indicator represents an
increase in the detected level of smoke, relative to the preset fire alarm
level.
Threshold Indicators
The illuminated LEDs represent visual settings for ALERT, PRE-ALARM,
and FIRE alarm levels.
Fault LEDs
Urgent
- Indicates a serious fault requiring immediate attention.
System
- Indicates a fault in the network.
Zone
- Indicates a fault in the VESDA Zone monitored by the Display
Module.
Power
- Indicates a fault in the power supply (If the GPI Function is used).
Network
- Indicates a communications fault on VESDAnet.
Airflow
- Indicates abnormal air flow through the inlet pipe.
Filter
- This LED illuminates when the air filter requires changing
Push Button Keys
These buttons enable various systems functions but can not be used to
configure the system. The Buttons can be disabled by the Systems
Administrator.
Mode/Test (Dual Function):
Selects toggles between the sensitivity,
smoke level and zone number modes. When depressed for more than two
seconds it performs a light test function.
Silence:
This button silences any alarm or fault warnings. It also stops the
LEDs from flashing to acknowledge a fault or alarm condition.
Reset:
Resets any latched alarms and faults on the detector. Any active
alarms or faults are reported again after the time delays have elapsed.
Isolate:
Isolates the detector from any external devices or systems (an
isolate alarm will normally be raised at the Fire Alarm Control Panel
(FACP)).
Note:
It is normal practise to signal the Isolate condition to the Fire
Control Panel using the Isolate relay
