87
15.0
Appendix D: Power Supply and
Battery Calculations (Selection
Guide)
Use the form below to determine the required secondary power supply (batteries).
*
Assume three Initiating Circuits are in alarm.
'
Use
0.084
for five minutes, 0.168 for 10 minutes and 0.5 for 30 minutes of alarm as a multiplier figure.
Using the Mircom MPD-65P 2-wire photoelectric smoke detector. See LT-1007SEC Conventional Device Compatibility Guide for
other compatible smoke detectors.
Total Current Requirement:
ALARM (
B
)______ Amps. (Value obtained from column
B
)
Battery Capacity Requirement:
Battery (AH) = (
[STANDBY (
A
) ______ ] x [(24,60 or 90 Hours) ___ ]
)
+
(
[ALARM (
B
) ______ ] x [Alarm in Hr.] _____
)
= (
C
) ______AH
Total System Current in Alarm State:
Must be 5.5 amperes or less for MR-2320 Series.
Battery Selection:
Multiply (
C
) by 1.20 to derate battery.
IMPORTANT NOTICE
The main AC branch circuit connection for Fire Alarm Control Panel 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: Specifications on page 84
for specifications.
POWER REQUIREMENTS (ALL CURRENTS ARE IN AMPERES)
Model
Number
Description
Qty
Standby
Total
Standby
Alarm
Total
Alarm
MR-2320-R
Pre-Action/Deluge and
Agent Release Control
Panel FIXED ELR/ACTIVE
ELR
X
0.123/0.092 =
0.316/
0.292
=
MR-2300-A
Det Class A Converter
Adder Module
X
0.000
= 0.000
=
MR-2300-NC2
Sig Class A Converter
Adder Module--2 Circuits
X
0.000
= 0.000
=
MR-2300-PR
Polarity Reversal and City
Tie Module
X
0.050
= 0.300
=
MR-2306-R6
6 Relay Adder Module
X
0.000
= 0.080
=
MR-2312-S12
12 Relay Smart Relay
Module
X
0.030
=
0.140
=
Two-Wire Smoke Detectors
X
0.00011
=
*
0.135
=
Four-Wire Smoke Detectors
X
=
=
Signal Load (bells, horns, strobes, and etc.)
X
=
Auxiliary Power Supply for Annunciators, etc.
=
=
Total currents (Add above currents) STANDBY
(
A
)
ALARM
(
B
)
Summary of Contents for MR-2320 Series
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