For step by step instructions on how to set up the Thre
-
sholds:
— select the “Wizard Thresholds” button.
+
The “Wizard Thresholds” option can be used only
when the Control panel connected to a computer,
and is in “Programming” status (as described in the
“Downloading” paragraph).
n
Options
This section will allow you to assign the Zone “attributes”.
Alarm Verification If this option is ENABLED, Alarm
will be verified as follows:
Ø
the system will not generate a Control panel Alarm
when the Zone first detects Alarm conditions;
Ø
the system will reset the Zone and start the Alarm
Verification Time (refer to “Panel settings”);
Ø
if the Zone triggers another Alarm while the Alarm
Verification Time is running, the system will generate
a Control panel Alarm.
Bypass missing detectors If the Zone is wired to
bypass missing detectors, this option MUST BE ENABLED.
NON-Silenceable R Output If this option is
ENABLED, the Repeat Output of the Zone concerned
([Rn] terminal) CANNOT be Silenced.
Pre-Alarm on R Output If this option is ENABLED, the
Control panel will activate the Repeat Output of the Zone
concerned ([Rn] terminal) during the Pre-Alarm phase.
Test zone on NACs If this option is ENABLED, the
Control panel will activate the NAC1 and NAC2 Outputs
for 1 second when the Zone is undergoes testing.
Gas Detector If this option is ENABLED, it will be possible
to connect a 4 - 20 mA Gas Detector to the Zone terminal.
+
The Gas Detector option can be ENABLED ONLY
for Zones 1, 9 and 17, respectively, the [Z1] termi
-
nals on the Main Board, and on Expander nr. 1 and
Expander nr. 2.
Double N.O. Gas Detector This option should be
enabled when using terminal [P] of the detector. When
this option is ENABLED, Zone thresholds will be auto
-
matically adjusted to the connection illustrated in Figure
16a on page 31. Thus, the Control panel will be able to
detect 2 activation thresholds, one for the Pre-Alarm
and one for the Alarm.
R Output Bistable This option is only available when
the Double N.O. Gas detector is enabled.
In this case, when the option R Output Bistable is ena
-
bled, the R Output of the zone is activated when the zone
exceeds the alarm threshold (or the pre-alarm threshold,
if the option “Pre-Alarm on R Output” is enabled) and re
-
turns to standby when the zone falls below the alarm
threshold, irrespectively of the Control panel status.
If the option R Output Bistable is disabled (factory de
-
fault), the R Output returns to standby when the Control
panel is reset.
n
Times
Pre-Alarm Time This field will allow you to program the
delay between the Zone Alarm and the Control panel Alarm.
+
If several Zones trigger Alarms within seconds of
one another, the Control panel will generate an
Alarm when the shortest Pre-Alarm Time of all the
Zones concerned expires.
Accepted values: 0 to 300 seconds (5 minutes), in steps
of 10 seconds.
Default setting: 60 seconds.
Investigation Time This field wilI allow you to program
an “interval” that will override the Pre-Alarm Time. This
“interval” will allow users time to investigate fire alerts.
It will be applied when the Ack/Evac. key is pressed for
less than 5 seconds at Access Level 2 (Keyswitch
ENABLED or PIN Code entered).
Accepted values: 0 to 300 seconds (5 minutes), in steps
of 10 seconds
Default value: 60 seconds.
Outputs
The Outputs page controls the pulse pattern for
Pre-Alarm (Alert) and/or Alarm (Evacuate) signalling on
the NAC1 and NAC2 outputs, and Alarm (Evacuate) si-
gnalling on the ALARM output.
The pattern is represented by a series of bells, each bell
representing a second.
The configuration of the RED and WHITE backgrounds
(for On and Off respectively e.g. all RED indicates conti
-
nuously On) determines the respective pulse pattern.
For example, the output devices (connected to
NAC1and NAC2) can be configured to have one audi
-
ble output for Pre-Alarm (Alert) and a different audible
output for Alarm (Evacuate), thus allowing users to di
-
stinguish between the two conditions, as follows.
n
NAC1 Output
Pre-Alarm pattern The bell chart will allow you to pro
-
gram the Pre-Alarm (Alert) pattern of NAC1.
Ø
= Output OFF for 1 second;
Ø
= Output ON for 1 second.
Pre-Alarm Default setting: NAC1 will turn ON for 2 se
-
conds then turn OFF for 6 seconds.
Alarm pattern To be set up in the same way as the
Pre-Alarm pattern of NAC1 but for the Alarm pattern.
Default setting: NAC1 is continuous.
40 Conventional Fire Panels J424/J408
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