Appendix B: Battery Calculations (Selection Guide) - Mircom FA-1025T Installation And Operation Manual

Appendix B: Battery Calculations (Selection Guide)

Appendix B: Battery Calculations (Selection Guide)
Use the form below to determine the required batteries.
The main AC branch circuit connection for the Fire Alarm Control Unit must provide a dedicated
continuous power without provision of any disconnect devices. Use #12 AWG wire with 600-volt
insulation and proper over-current circuit protection that complies with the local codes.
Model
Description
Number
Fire Alarm, 5 Det,
FA-1025T
2 Sig
Annunciator, 5
RA-105
Circuits
Remote Trouble
RTI-1
Indicator
2-Wire Smoke Detectors
4-Wire Smoke Detectors
Signal Load (bells, horns,
strobes, and etc.)
Total currents (Add above currents)
Total Current Requirement
ALARM (B)______ Amps.
Battery Capacity Requirement
(
[STANDBY (A) ______ ] X [(24 or 60 Hours) ________ ]
Battery Selection
Multiply (C) by 1.20 to derate battery.
Note: Batteries BA-104 (4.0AH) and BA-1065(6.5AH) fit into the backboxes; all larger
batteries such as BA-110(10AH) and the BA-117(17AH) require an external
battery box.
*
Assuming three initiating circuits in alarm.
♣
Use 0.084 for five minutes of alarm or 0.5 for thirty minutes of alarm as a multiplier figure.
♦
Using the MIR-525/U 2-wire smoke detector. See Appendix A, for other available smoke detectors .
14
IMPORTANT NOTICE
Power Requirements (All currents are in amperes)
Qty
X
X
X
X
X
) (
+ [ALARM (B) ______ ] X [
Total
Standby
Standby
0.114 =
0.016 =
0.035 =
♦
=
0.0001
=
Standby (A)
♣
Alarm in Hr.] ________
Total
Alarm
Alarm
0.200 =
0.032 =
0.035 =
* 0.090 = 0.090
=
=
(B)
)
= (C) ________AH