Operating instructions

FC Operation & Maintenance Guide (20 & 25 Amp)
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Protect the charger from construction grit, metal chips, paint or other debris. Clean away debris after
installation.
3.2 Power Connections
Connection should be made by a qualified installer. Remove the two screws securing the charger's
top front panel to gain access to the connections.
Use AWG #8 or larger wire for DC (charger to battery) leads.
Use AWG #12 or larger wire for AC input and ground connections.
WARNING: The battery charger should be connected to a grounded permanent wiring system. A
ground stud is provided for this purpose
Knockouts accommodating 1/2" conduit and fittings are located on each side of the charger. Run the
AC wiring independent of the DC and alarm wiring.
The voltmeter will show battery voltage as soon as the FC connection is completed. Check the
voltmeter as soon as the FC connection has been made. If the meter reads zero or is deflecting
below zero, reverse the polarity of the battery connections. The charger will be damaged if it is
operated into a backwards connected battery.
3.3 Alarm Connections (pertains only to FCA models)
Refer to the alarm installation drawings at the end of this manual for connection instructions..
Alarm relays are rated for a maximum of 2 amps at 24 volts DC, or 0.5 amps at 32 volts DC (non-
inductive loads only). Connect the alarm relay to customer-supplied supervisory system only -- do
not apply AC power to the relays and do not exceed the relays’ ratings.
There are two versions of FCA alarm board; both meet NFPA 110:
Condition LED Indicator Form C contact with Model # suffix
AC on Green LED none
Low battery voltage Amber LED -2231, -2431
Charger failure Red LED -2231, -2431
AC fail Red LED -2431 only
High battery voltage Red LED -2431 only
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Using Charger
4.1 Charger Features
FC/FCA chargers feature soft start circuitry which causes a gradual increase in output power
after application of AC power. The Autoboost system causes the charger initially to operate at