Pre-Alarm (AWACS™) Applications Pre-Alarm Programming
164 IQ-301 PN 50036:F 10/29/2001
99=Prealm. Figure 155 shows a sample panel display of the Pre-Alarm screen with
default Alert and Action Pre-Alarm levels:
Figure 155 Sample Display of Pre-Alarm Screen with Default Values
When programming Pre-Alarm settings, note the following:
• The Alert default is 70%.
• The default value for Action is 00%. ACTION=00% means no Pre-Alarm,
therefore the default is no Action level.
• Allowable settings for Alert and Action are 00% to 99%.
• The control panel software ensures that the Action level is higher than the Alert
level (or the Action level is zero) and that both are below 100%.
G.3.2 Selecting Pre-Alarm Application Levels
Alert and Action Pre-Alarm levels are global settings, meaning they apply to all
photoelectric or ionization detectors. You can, however, select different Action levels as
detailed below. Figure 156 shows typical AWACS™ application threshold levels:
Figure 156 Typical AWACS™ Application Threshold Levels
Selecting Different Action Levels
You can select different Pre-Alarm Action levels for each detector by selecting different
alarm levels. For example, two detectors, D13 and D14, are connected to a control panel
with a global Alert level set to 50% of alarm. Select different Pre-Alarm levels as
follows:
• Detector D13 – Set to alarm at 2.00%, D13 so it will Pre-Alarm at 1.00% per foot
(30.48 cm) obscuration.
• Detector D14 – Set to alarm at 1.00%, so it will Pre-Alarm at 0.50% per foot
(30.48 cm) obscuration.
PRE-ALARM@ZONE@99
ALERT=70%@OF@ALARM
ACTION=00%@OF@ALARM
Alert=70% of Alarm means that every photo and ion
detector will give an Alert indication when its sensitivity
reaches 70% of its alarm level (default setting).
Action=00% of Alarm – no
Pre-Alarm Action level selected in the
system (default setting)
Status banner for
Pre-Alarm Zone 99
3%
2%
1%
SMOKE OBSCURATION
% per foot
ALERT
Warning at panel of
possible fire
ACTION
Shut off power to
equipment monitored
by this detector
ALARM
Evacuate building
and call fire
department
TIME
AWACsChart.cdr
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