Field Devices; End-Of-Line Devices - Zircon EN54 Installation & Configuration Manual

EN54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
CAUTION
DO NOT use a Megger
on zone wiring with
diodes in circuit.
CAUTION
Replace AEOLs on existing
installations with a 0.47µF
capacitor or use Additional
kit (ZIRCON/EN/CAPKIT).
CAUTION
AEOL must be configured
or the panel may report
an alarm at power up.
4

Field Devices

The Fire Control Panel is capable of working with various
manucturer's field devices (for compatible field devices
refer to Section 1 Introduction).
Each of these devices is supplied with an instruction leaflet
showing the correct interconnections for various applications.
Before connecting the panel or devices, the wiring should
be tested for insulation and continuity. Once any
components are connected, do not use a high-voltage
tester, such as a Megger, on the circuitry. Low-voltage
multimeters may be used.
CAUTION - DO NOT use a Megger on zone wiring with
detector heads removed (or fitted) as this will damage
the Schottky diodes fitted to the bases and/or detectors.
Some manufacturers fit a spring in the detector base
which can be used to manually short-circuit the diode
for wiring testing prior to fitting detectors. Where a spring
is not provided, use a link
to the manuafacturer's instructions provided.
1 DO NOT forget to remove these links at the
completion of wiring testing.

4.1 End-of-Line Devices

The panel is designed to work with the following zone
circuit end-of-line (EOL) devices:
•
A 0.47µF capacitor, or
•
A 4k7 resistor*
* This EOL device is not recommended for new
installations where the latest field devices are to be used.
The 4k7 resistor should only be used where the control
panel is being installed as a fire control panel replacement
and the existing field devices are to be retained.
Using the 0.47µF capacitor will reduce the size of the
standby batteries. Refer to Section 6.4.1 Batteries for
more information on recommended battery sizes. Where
zones are to use a mix of detectors and MCPs a 0.47µF
capacitor EOL device must be used.
Retrofit Installations
The 4k7 resistor EOL devices may be retained on existing
installations. However, existing Active End-of-Line (AEOL)
devices must be replaced with a 0.47µF capacitor or the
additional kit (ZIRCON/EN/CAPKIT) must be fitted (refer
to Section 6.3 External Wiring for EOL device
compatibility issues).
Caution: To avoid inadvertant activation of the sounders
the panel must be re-configured to work with resistor
EOL devices - Refer to Section 7.5.6 EOL Device Type.
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to short out the diode. Refer
997-532-000-1, Issue 1
March 2006