Appendix A: Battery Selection Guide - Fire-Lite MP-24 Instruction Manual

Symptom
4. Zone always
in alarm.

Appendix A: Battery Selection Guide

A 2.5 AH battery will power the control panel plus compatible two-wire detectors in the non-alarmed standby
mode for 60 hours and then operate the Notification Appliances for 5 minutes. If the control panel is providing
power to external devices other than two-wire detectors and Notification Appliances, use the following table to
determine the required battery capacity. Record battery information on the door label.
Standby
Requirements
24 hour Standby,
5 minute alarm,
25 mA
NFPA 72A & 72D
Single
Zone
60 hour Standby,
5 minute alarm,
NFPA 72B & 72C
24 hour Standby,
5 minute alarm,
30 mA
NFPA 72A
Two
Zone
60 hour Standby,
5 minute alarm,
NFPA 72B & 72C
TABLE A.1: Maximum Current Available for Various Battery System Combinations.
1) The table shows the maximum current available for the operation of external power consuming devices connected
to the control panel for different capacity standby batteries.
2) Power consuming devices include 4-wire detectors, end-of-line relays, remote trouble signal devices (bell, horns
and lamps), remote station loading on MP-TR12/24 module, and any device powered from terminals 5 and 7.
3) Table A.1 is based on 80% battery use.
4) Batteries are float charged during normal standby operation. A discharged battery will charge and obtain its float
voltage within 48 hours.
5) Batteries available from Fire•Lite:
– PS-1242 12 Volt, 4.2 AH.
– PS-1270 12 Volt, 7.0 AH.
6) Required battery voltage is 12V for the MP-12; 24V for the MP-24.
Compatible Detectors
See the Device Compatibility Document (Document 15384).
16
Symptom Analysis
1. Defective detector.
2. Shorted heat detector.
3. Activated station
4. Too many smoke
detectors on zone.
5. Damaged circuit card.
2.5 AH 4.0 AH 4.5 AH
0.058 A 0.108 A 0.125 A
0.008 A 0.028 A 0.035 A
0.053 A 0.103 A 0.120 A
0.003 A 0.023 A 0.030 A
MP12/24 Fire Alarm Control Panel
Remedial Action
1. Disconnect field wiring and install
ELRs. If panel resets to normal, check for
damaged or incorrectly wired detector
and replace it.
2. Typical zone supervisory current 5 mA
(approximately)
1. Locate detector and replace.
1. Locate detector and replace.
1.Reduce number of detectors.
1. Remove zone wires and install ELR
resistor.
2. If trouble clears, check field wires.
3. If trouble does not clear, replace
circuit board.
5.0 AH 5.5 AH
0.141 A 0.158 A
0.041 A 0.048 A
0.136 A 0.153 A
0.036 A 0.043 A
Document 15440:G 6/6/96
6.0 AH 7.0 AH
0.175 A 0.191 A
0.055 A 0.061 A
0.170 A 0.186 A
0.050 A 0.056 A