151430-L8 Before You Begin Installation
3-16
3.6.4 Maximum Battery Standby Load
Table 3-3 and Table 3-4 show the standby load calculations for the IFP-2000 based on 24 and 90 hours of
standby. The standby load calculations of line D in the Current Draw Calculation Worksheet (Table 3-1 for IDP
devices and Table 3-2 for SD devices) must be less than the number shown in Table 3-3 and Table 3-4 for the
selected battery size, standby hour and alarm time. The numbers below have a built in 20% derating factor for the
battery amp-hour capacity
*For FM Installation only
3.7 Installation Task Overview
This section provides a chart listing tasks that need to be performed when installing the IFP-2000/ECS system.
The chart is intended to be another way for you to make sure you have completed all necessary tasks. Unless
noted, these tasks do not have to be performed in the order they are listed here.
Important: Connect and address SLC devices before running JumpStart AutoProgramming.
Table 3-3: Maximum Battery Standby Loads for 24 Hour Standby
Rechargeable
Battery Size
24 hr Standby,
5 mins. Alarm
24 hr Standby,
15 min alarm
24 hr Standby,
20 min alarm
17AH 535 mA 473mA 442mA
18AH 569mA 506mA 475mA
24AH 769 mA 706mA 675mA
33AH 1.07A 1.01A 975mA
35AH 1.14A 1.07A 1.04A
40AH 1.30A 1.24A 1.21A
55AH 1.80A 1.74A 1.71A
Table 3-4: Maximum Battery Standby Loads for 90 Hour Standby*
Rechargeable
Battery Size
90 hr Standby,
5 min alarm
90 hr Standby,
15 min alarm
90 hr Standby,
20 min alarm
33 AH N/A N/A N/A
40 AH 347mA 331mA 322mA
55 AH 480mA 464mA 456mA
Warning!
Silent Knight does not support the use of batteries smaller than those listed in Table 3-3 and Table 3-4. If you use a battery
too small for the installation, the system could overload the battery resulting in the installation having less than the required
24 hours standby power. Use Table 3-3 and Table 3-4 to calculate the correct battery amp hour rating needed for your
installation. It is recommended that you replace batteries every five years.
Task
See Section
(for more info.)
Main Panel Hardware Installation
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