997-492-000-5, Issue 5
June 2009
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
19
Recommended Battery Size
The recommended battery sizes are given in the table
below. The table is in two parts: the top part recommends
battery sizes when 0.47μF capacitor EOL devices are
used with 2, 4 or 8 zone panels and with 24hr or 72hr
battery backup. The second part recommends battery
sizes when 4k7 resistor EOL devices are used with 2, 4
or 8 zone panels and with 24hr or 72hr battery backup.
The table below gives a quick guide to the battery size
required, provided that no load is connected to the
auxiliary output on the PSU PCB. If you need more detail,
or have connected an auxiliary load, please refer to the
full calculation table in Section 9 Battery Calculation.
Note that the table below may specifiy slightly larger
batteries than using the calculation in Section 9.
Using Larger Battery Sizes
The largest battery size that can be installed in the back
box is 7Ah. Batteries less than 2.8Ah should not be
used.W
Battery Disposal
As a mimimum, replace batteries every four years.
Always dispose of batteries in accordance with the battery
manufacturer’s recommendations and local regulations.
2 Zone 4 Zone 8 Zone
2.8 2.8 2.8
777
2.8 7 7
777*
Alarm Current Standby TimeEOL
0.47 Fm
Capacitor
4k7
Resistor
Up to 1A 24hrs
Up to 1A 72hrs
Up to 1A 24hrs
Up to 1A 72hrs
*
Maximum of 2 zones with 4k7 EOL
CAUTION
Batteries less than
2.8Ah should not be
used.
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