Siemens FC2005 - Appendix-C: Troubleshooting; Definitions for Event History Entries

57
Battery Size
Total Standby
Current
(from above)
Hours of Standby
Required per NFPA 72
Standard
(4, 24 or 90)
AH for
Standby
A
X Hours
=
Total Alarm
Current
(from above)
5 Minutes of Alarm
Operation per UL
4 Minutes of Alarm plus
12 hours reduced time
annunciation per UL (CO
monitoring UL 69.2.5
Exception #2)
30 Minutes of Alarm
Operation per ULC
AH for Alarm
A
X Hours
=
A.H. for
Standby
A.H. for
Alarm
Calculated
A.H.
De-rating
Factor
(20%
derating
per UL864)
A.H.
Required
Battery
Capacity
+
=
X 1.2
=
Notes:
1. An additional multiplier is included to compensate for the higher discharge rate in alarm. Battery
capacity decreases with age.
2. Total standby current is limited to 0.247 A for Canada and 0.381 A for US.
3. Total alarm current is limited to 4.6 A.
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