Household Fire Warning Equipment - Bosch B9512G Installation And System Reference Manual

Control Panels
Holdup
Residential Fire
Access Control
Table 19.13: Minimum standby and alarm times
Type
Household Burglary and
Commercial Burglary
Bank Safe and Vault
Central Station or Local
Fire Alarm
Remote Station or
Auxiliary Fire Alarm
Household Fire Warning
Equipment
Access Control (Level iV
Standby Power)
Table 19.14: Standby battery requirements
Notice!
Because of changing regulations, verify the necessary time with your local authority having
jurisdiction (AHJ).
19.4.1

Household Fire Warning equipment

The Household Fire Warning Equipment Standard requires 24 hours of standby current plus 4
minutes of alarm operation at the end of the 24-hour period. Use battery Ah calculations to
confirm compliance. The formula shown below includes the calculation for 4 minutes of alarm
operation at the end of the 24-hour period, and a 15% contingency factor that allows for
depletion of battery capacity with age.
1
Total B Hours
( ________ x 24 )
1
Refer to previous table.
2
Value = Minutes of alarm operation/60
3
Total Ah requirements must not exceed the Ah capacity of batteries:
– One D126 Battery = 7 Ah
– Two D126 Batteries = 14 Ah
– One D1218 Battery = 17.2 or 18 Ah
Table 19.15: Household fire ampere-hour (Ah) calculation formula
Bosch Security Systems, Inc.
Required capacity
4 hours
72 hours (UL 365). Auxiliary power current for all devices,
including keypads, must be limited to 250 mA or less to meet
this requirement.
24 hours + 5 minutes of alarm operation.
60 hours + 5 minutes of alarm operation.
24 hours + 4 minutes of alarm operation.
4 hours
1
Total C Alarm Operation
+ ( ________ x 0.083)
Installation and System Reference Guide
8
24
4
2
+
Approved applications | en 113
N/A
5 (CUL)/4 (UL)
N/A
Calculations
Contingency Total Ah
15% = _________
2016.06 | 08 | F.01U.303.996
3