1.2.11 Standby Existing Load; Table 5: Required Battery Size Calculation; Table 6: Standby Load Battery Size (Ah) - Bosch FPD-7024 Operation And Installation Manual

FPD-7024 | Operation and Installation Guide | 1.0
The units shown in Table 5 are Amp hours (Ah), and the figures include a 20% derating factor.
Table 5: Required Battery Size Calculation
Grand Total Standby Existing (in amps)
Total Hours of Standby Required (usually 24 or 60):
Total Standby Capacity (multiply CS X HS)
Grand Total Alarm Existing (in amps)
Total Hours of Alarm Time Required (usually 0.083 or 0.25):
Total Standby Capacity (multiply CA X HA)
Total Capacity Required (add TA + TS):
Required Capacity with 20% Derating (TC X 1.2)
The required battery size to support the system can be calculated using Table 6 and Table 7
on page 13.

1.2.11 Standby Existing Load

Use Table 6 to estimate the size of the battery required to support the standby load, then use Table 7 on page
13 to estimate the size of the battery required to support the alarm load. Add the results together for the total
battery size. Select the next larger standard battery for the system. If the results show a requirement for a
battery over 40 Ah, reduce the existing or add an external regulated fire protective signaling power supply.
Table 6: Standby Load Battery Size (Ah)
Standby Load Battery Size Chart
Grand Total Standby Existing
100 to 200 mA
201 to 300 mA
301 to 400 mA
401 to 500 mA
501 to 600 mA
601 to 700 mA
701 to 800 mA
801 to 900 mA
901 to 1000 mA
1001 to 1100 mA
12
Overview
CS
HS
TS= CS X HS
CA
HA
TA= CA X HA
TC = TA + TS
C = TC X 1.2
Capacity Required for Capacity Required for
24 Hours 48 Hours
5.8 11.5
8.6 17.3
11.5 23.0
14.4 28.8
17.3 34.6
20.2 X
23.0 X
25.9 X
28.8 X
31.7 X
Bosch Security Systems, Inc. | 1/10 | F01U008458-03
Capacity Required for
60 Hours
14.4
21.6
28.8
36.0
X
X
X
X
X
X