1: Nfpa Battery Requirements; 2: Selecting And Locating Batteries - Honeywell HPF24S8 Installation Manual

Calculating the Battery Size
5. Write the ampere hour requirements on the Protected Premises label located inside the cabinet
door.
Secondary Standby Load
(total from Table 6.3
Calculation Column 3)
[
Primary Alarm Load
(total from Table 6.3
Calculation Column 2)
[
Sum of Standby and Alarm Ampere Hours
For nonULC applications, multiply by the Derating Factor
For ULC applications, multiply by the Derating Factor
Battery Size, Total Ampere Hours Required
6.4.1 NFPA Battery Requirements
NFPA 72 Local and Proprietary Fire Alarm Systems require 24 hours of standby power followed by
5 minutes in alarm
6.4.2 Selecting and Locating Batteries
Select batteries that meet or exceed the total ampere hours calculated in Table 6.4 . The power
supply can charge batteries in the 7 AH to 18 AH range. The power supply cabinet is capable of
housing batteries up to 7 AH. Batteries larger than 7 AH require the BB-17 or other UL listed
external battery cabinet.
HPF24S Series Power Supplies — P/N 52751:D3 5/11/2010
]
]
Table 6.4 Total Secondary Power Requirements at 24 VDC
* Multiply by only one of the Derating Factors, depending on whether the power
supply is being used for a ULC (Canadian) application or nonULC application.
Required Standby Time
(24 or 60 hours)
X [ ]
Required Alarm Time
(for 5 min., enter 0.084,
for 10 min., enter 0.168)
X [
*
*
Power Supply Requirements
= AH
= AH
= AH
X 1.2
X 2.5
= AH
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