EQUIPMENT: DUO-CEL WRITTEN BY: RKP
PUBLICATION: OM_DUO-CEL_INST CHECKED BY: AJC
ISSUE No. & DATE: 2 13/10/10
PAGE 20 of 30
7.7 Selectable Zonal or General Alarm
sounder operation
The Zonal Alarms DIL switch allows the sounder
circuits to operate zonally in line with the alarm
zone. The actual operation of the alarm circuits will
vary depending on the type of zone detection and
number of zones available on the panel.
Twin-wire panel (1 to 8 zones):
All twin-wire sounders operate zonally, sounder
circuits on the motherboard operate as general
alarms (i.e. all four alarm circuits on the
motherboard operate for any zone fire)
Standard panel, 1 to 4 zone panels:
Sounder circuits 1 to 4 operate individually for a
fire condition on the respective zone. 1 and 2-
zone panels have 2 sounder circuits).
Standard panel, 8-zone panel:
Sounder circuits 1 to 4 operate as general alarms
(i.e. all four alarm circuits on the motherboard
operate for any zone fire).
7.8 Buzzer Disable
The Disable Buz DIL switch allows the panel
buzzer and Buzzer Active output to be disabled so
that they do not operate for alarms or faults. The
panel buzzer will still operate for button presses.
The panel does not give any indication that the
buzzer has been disabled. This feature is
provided for use during panel commissioning
and maintenance only. Ensure that the DIL
switch is returned to the OFF position after
commissioning/maintenance tests are complete.
7.9 Earth Fault monitoring.
The DUO-CEL panel is designed to monitor for
low impedance faults to earth on the field cables.
Earth faults can lead to false alarms or failure to
operate the sounders or other outputs.
For installations where earth fault monitoring is
unsuitable, it can be disabled by removal of the
insulated jumper link. The link can be placed just
on one pin rather than across both pins.
Earth Fault monitoring should be disabled only
after all field cabling has been tested and
confirmed to be free from faults.
8. Commissioning the Panel
After completion of the pre-commissioning wiring
check, power-up and configuration steps,
commission the circuits in line with the following
guide.
NOTE:
Operation of the panel buttons requires the
Access key to be inserted and rotated to the
vertical position.
8.1 General Alarm Circuits
1. Remove the resistor from the first alarm circuit
terminal and connect the first alarm circuit
wiring to the terminals, observing correct
polarity. The panel will indicate SOUNDER
FAULT.
2. Place the EOL resistor across the terminals of
the last sounder on the circuit. Check that the
sounder fault indication clears.
3. Use the Alarm Test facility [see DUO-CEL
User Manual] or press the Evacuate button to
operate the sounders. Check that all sounders
connected to the alarm circuit operate.
4. Clear the Alarms Test condition or press
SILENCE/RESOUND ALARMS as required.
All sounders should be silent.
5. Repeat steps 1 to 4 for any remaining alarm
circuits.
8.2 Detection zones
Work logically and systematically through each
zone. All devices on each zone must be tested and
verified to be working correctly.
8.2.1 Zone Fault Indications
1. Remove the EOL from the zone 1 terminals
and connect the cables of the zone 1 circuit to
the panel terminals, observing the correct
polarity. The panel will indicate a zone fault
for zone 1. The panel will also indicate a
sounder fault if set to twin-wire mode.
2. Place the EOL across the last device on zone 1,
observing correct polarity. Check that any zone
1 fault (and sounder fault if twin-wire)
indications clear after a few seconds. For twin-
wire panels, the panel should be powered
down and then powered up again to set the
correct quiescent threshold.
3. Check the fault monitoring of the cable is
correct by applying an open circuit then a short
circuit at the EOL device. Check that the fault
condition is indicated on the correct zone at the
fire panel.
4. Restore the zone circuit to the healthy
condition and confirm that the fault indication
clears.
Repeat steps 1 to 4 for all additional zones.
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