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APPENDIX "D" - POWER SUPPLY & BATTERY CALCULATIONS (SELECTION GUIDE)
Use the form below to determine the required Secondary Power Supply (batteries).
IMPORTANT NOTICE
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. Refer to appendix "C" for
specifications.
POWER REQUIREMENTS (ALL CURRENTS ARE IN AMPERES)
Model Number Description Qty STANDBY TOTAL ALARM TOTAL
STANDBY ALARM
FW-C2Z, Fire Alarm 1 X 0.110 = 0.220 =
FW-C4Z, FW-C4EZ Control Panel
FW-EZM4 Zone Expansion X 0.045 = 0.120 =
FW-RB4 / FW-RB8 Relay Module X 0.005 = 0.160 =
FW-RPM City Tie Module X 0.035 = 0.300 =
FW-DACT DACT / Dialer Module X 0.045 = 0.120 =
FW-RB8 Remote Annunciator X 0.035 = 0.090 =
FW-RTI Remote Trouble Indicator X 0.035 = 0.035 =
2-Wire Smoke Detectors X ' 0.0001 = * 0.090 = 0.090
4-Wire Smoke Detectors X = =
Signal Load (bells, horns, strobes, and etc.) =
Auxiliary Power Supply for Annunciators, etc. = =
ALARM
Total currents (Add above currents) STANDBY (A) (B)
Total Current Requirement: ALARM (B)______ Amps.
Battery Capacity Requirement:
([STANDBY (A) ______ ] X [(24 or 60 Hours) ___ ]) + ([ALARM (B) ______ ] X [%Alarm in Hr.] _____) = (C) ______AH
Total Alarm Current: Must be 2.75 amperes or less for FW-C2Z, and FW-C4Z. Notification Circuits not to exceed 2.4 amperes.
Must be 6 amperes or less for FW-C4EZ. Notification Circuits not to exceed 5 amperes.
Battery Selection: Multiply (C) by 1.20 to derate battery.
Use 6.5AH Batteries for the FW-C2Z, FW-C4Z.
Use 10AH Batteries for the FW-C4EZ.
The FW-C4EZ will charge up to 24AH Batteries if they are in an external Battery Cabinet.
* Assuming three Initiating Circuits in alarm.
% Use 0.084 for five minutes of alarm as a multiplier figure.
' Using the 1400-A 2-wire smoke detector. See Appendix "A", for other available smoke detectors .
Examples: Configuration 24 Hrs Standby, 5 Min Alarm 60 Hrs Standby, 5 Min Alarm
FW-C2Z/4 Basic 4 AH Batteries Not Possible
FW-C2Z/4, FW-DACT, FW-RB8, RTI 6.5 AH Batteries Not Possible
FW-C4EZ, FW-EZM4 10 AH Batteries 12 AH Batteries
FW-C4EZ, FW-EZM4, FW-DACT, FW-RB8, 3 of FW-RB8 10 AH Batteries 24 AH Batteries
Always use the Selection Guide Chart to verify actual Battery Requirements.
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