Calculating The Battery Size; 1: Nfpa Battery Requirements; 2: Selecting And Locating Batteries - Honeywell NOTIFIER NFC-50/100 Instruction Manual

Power Supply Calculations

6.4 Calculating the Battery Size

Use Table 6.3 to calculate the total Standby and Alarm load in ampere hours (AH). This total load determines the battery size (in AH),
required to support the NFC-50/100 under the loss of AC power. Complete Table 6.3 as follows:
1. Enter the totals from Table 6.2 on page 79 Calculation Columns 1 and 2 where shown.
2. Enter the NFPA Standby and Alarm times (refer to Section 6.4.1, "NFPA Battery Requirements").
3. Calculate the ampere hours for Standby and Alarm, then sum the Standby and Alarm ampere hours.
4. Multiply the sum by the derating factor of 1.2 to get the proper battery size (in AH).
5. Write the ampere hour requirements on the Protected Premises label located inside the cabinet door
.
Secondary Standby Load
(total from Table 6.2 Calculation Column 1)
[
Secondary Alarm Load
(total from Table 6.2 Calculation Column 2)
[
Sum of Standby and Alarm Ampere Hours
Multiply by the Derating Factor
Battery Size, Total Ampere Hours Required
6.4.1 NFPA Battery Requirements
NFPA requires 24 hours of standby plus 15 minutes activation for audio systems. The total ampere hours required cannot exceed 26 AH
with an internal charger. An external charger can be used to increase the total ampere hours (internal charger must be disabled).
6.4.2 Selecting and Locating Batteries
Select batteries that meet or exceed the total ampere hours calculated in Table 6.3. The audio panel can charge batteries in the 12 AH to
26 AH range. The NFC-50/100 can house up to 18 AH batteries.
80
]
]
Table 6.3 Total Secondary Power Requirements at 24 VDC
Required Standby Time
(24 or 60 hours)
[ ]
Required Alarm Time
(for 5 min., enter 0.084,
for 10 min., enter 0.168,
for 15 min., enter 0.250)
for 30 min., enter 0.50)
[ ]
Notifier FirstCommand Series Manual — P/N LS10001-001NF-E:H 1/8/2018
Calculating the Battery Size
= AH
= AH
= AH
X 1.2
= AH