Appendix "B" Battery Calculations - Mircom FA-101U Installation And Operation Manual

APPENDIX "B" - BATTERY CALCULATIONS (SELECTION GUIDE)
Use the form below to determine the required batteries.
The main AC branch circuit connection for 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 Number
FA-101U Fire Alarm , 1 Det, 1 Sig
FA-102U Fire Alarm, 2 Det, 1 Sig
FA-1025U Fire Alarm, 5 Det, 2 Sig
RTI-1 Remote Trouble 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.
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-425/U 2-wire smoke detector. See Appendix "A", for other available smoke detectors .
IMPORTANT NOTICE
POWER REQUIREMENTS (ALL CURRENTS ARE IN AMPERES)
Description Qty
) (
+ [ALARM (B) ______ ] X [
STANDBY
X 0.066 =
X 0.076 =
X 0.114 =
X 0.035 =
X =
' 0.0001
X =
STANDBY (A)
%
Alarm in Hr.] _____
-14-
TOTAL ALARM
STANDBY
0.125
0.135
0.200
0.035
0.090
*
)
= (C) ______AH
TOTAL
ALARM
=
=
=
=
= 0.090
=
=
(B)