Charger Operation - Redback A 4506 Operating Manual

7.0 Charger Operation

Once wiring is finished switch on the unit.
You should see the battery voltage and current draw indicated on the displays on the front panel. This refers to the voltage
available at the battery terminals and the current flowing through the batteries. (A positive current figure indicates the
batteries are being charged while a negative current figure indicates that the batteries are supplying power to the load(s)).
It is common for the battery voltage to read nominally higher than the voltage rating of 24VDC.
Whilst the battery is connected to the unit and mains power is applied, the charger will continue to charge the battery.
The charger will charge the battery at "Boost" current (6A for A 4506 or 12A for A 4512) until 29.4V is reached, at
which time the battery charger will continue to "Absorb" charge and then "Trickle" charge the battery in order to keep it
topped up at 27.6V.
LED's on the front panel indicate when these changes in the cycle occur.
Should mains power fail, the unit will automatically switch the connected load(s) to the battery. When mains power is
restored the load(s) will be disconnected from the battery. LED's on the front panel indicate when the unit is running of the
mains or the battery.
If power is not restored before the battery voltage drops below 22V, the unit will automatically disengage the battery from
the load. This will prevent long term blackouts from damaging the battery.
Should the unit fail to operate in the above manner refer to troubleshooting.
8.0 Battery Isolate/Reset
The A 4506 and A 4512 battery charger models are fitted with an 100Amp breaker which is in line with the battery +ve
terminal. This breaker can be used as an isolator to quickly disengage the batteries without having to disconnect leads. It
also acts as a safe guard against short circuits in the battery leads or reverse polarity connection.
9.0 Auxiliary Outputs and Alarm Contacts
24V auxiliary outputs have been provided so that external devices requiring 24V DC can be powered. Two sets of output
terminals have been provided. The total combined load current available from these outputs is 1A maximum and is
protected by an internal 1amp resettable fuse.
Alarm contacts have been provided for external monitoring of the battery charger. These contacts are normally open and
close when there is a mains power fail or a low battery status is achieved.
10.0 Battery Charging Time
The table below indicates typical charging times for the shown ampere hour ratings.
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6
Charging time is dependent on the ampere hour rating of
the battery and its condition of charge.
Typical charge times for fully dis-
charged batteries using 6A model
No. A 4506
24AH 6Hrs
40AH 10Hrs
Typical charge times for fully dis-
charged batteries using 12A model
No. A 4512
60AH 8Hrs
80AH 10Hrs
100AH 12Hrs
120AH 14Hrs