Hardware Installation—IFC-200 Hardware Installation Procedures 39
The NR45-24 remote battery charger is capable of charging
20 to 55 amp-hour batteries. This unit is required in a control panel
system using 25 amp-hour or larger batteries. The batteries and charger
are housed in the NR45-24 cabinet, which can be mounted up to 20 feet
away from the control panel. To determine the battery size needed in a
particular system, see the Supply Calculations section in this document.
NR45-24
Figure 32: NR45-24 Remote Battery Charger
Follow the steps below to connect the primary 120 VAC power source.
1. Turn off the breaker at the main power distribution panel.
2. Connect the primary Hot line to terminal 1 on the NR45-24 and the
primary Neutral line to terminal 2.
All connections between the IFC-200 and the NR45-24 must be made in
conduit, within 20 ft, using 14 AWG wire. Do not route 120 VAC wiring
in the same conduit as other control panel circuits. Leave the main power
breaker off until installation of the entire system is complete. Cut JP2 on
the IFC-200 to disable internal charger.
The NR45-24 battery charger is designed to charge 24 V rechargeable
cells (sealed gel cell, wet cell, and Ni-Cad) rated 20 to 55 amp-hours.
Batteries are float charged during normal operation. A discharged battery
charges at 2.0 amps (typically) and its float voltage of 27.6 V within
48 hours. Use the pot on board to readjust the output.
Power Requirements
120 VAC, 1.0 amp, 60 Hz.
NR45-24
Remote Battery
Charger
Connecting the
Primary Power
Source
Connecting the
Secondary Power
Source
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