Battery Size Calculations - Faraday FireWatch 400 Owner's Manual

Appendix A. Reference Data

Battery Size Calculations

Control Unit (4 zones)
City Tie Board Standby
Alarm
w/ Alarm Tie - add Standby
Alarm
w/ Trouble Tie - add Alarm
Alarm
Alarm Relay Board Standby
Alarm
Remote LED Standby
Annunciator Driver Alarm
7704 / 7704-01 Standby
LED Annunciator Alarm
7700 / 7700-01 Standby
Trouble Unit Alarm
2-wire Smoke Detectors:
Catalog # Quantity
The detector models may be mixed and matched as long as the total maximum standby current does not
exceed 3.0 mA per initiating device circuit. The total number of detectors on a circuit should not exceed 30.
4-wire Smoke Detectors
Catalog # Quantity
Standby
Alarm
Standby
Alarm
Standby
Alarm
End of Line Relay
Catalog # Quantity
Notification Appliances
Catalog # Quantity
Other
Total Standby Current
(from above)
Total Alarm Current
(from above)
Notes: * An additional multiplier is included to compensate for the higher discharge rate in alarm.
** Battery capacity decreases with age. A 4-year old battery can lose up to 50% of its capacity.
Compensations should be made to allow for this loss.
A-2
.015 .015
.035 .035
.010 .010
.010 .010
.010 .010
.010 .010
.010 .010
.035 .035
.010 .010
.015 .015
.040 .040
.060 .060
.040 .040
.040 .040
X Current (A)
X =
X. =
X =
X Current (A.)
X =
X =
X =
X =
X =
X =
X Current (A.)
X =
X Current (A.)
X =
X =
X =
X =
=
TOTAL
Hours of Standby Required per
NFPA 72 Standard (4, 24 or 60)
A. x ____ Hours
5 Minutes of Alarm Operation
per NFPA 72 Standard*
A. x 0.33 Hours
A.H. for A.H. for
Standby Alarm Battery Capacity
+ =
firealarmresources.com
Standby
Current (A.)
.075
+
NA
NA
NA
+
NA
+
NA
+
NA
+
NA
+
+
+
+
NA
+
NA
+
NA
+
NA
NA
NA
NA
+
AH for Standby
=
AH for Alarm
=
A.H. Required
P/N 446613 Issue I Rev. A
Alarm
Current (A.)
.300
NA
+
NA
+
NA
+
NA
+
NA
+
NA
+
NA
+
NA
NA
NA
NA
+
NA
+
NA
+
+
+
+
+
+
+