Redarc BCDC1220, BCDC1220-IGN User Manual

20A In-vehicle 3-Stage

12V Battery Charger

BCDC1220

THE BCDC1220

The BCDC1220 In-vehicle Battery Charger features technology designed to charge your batteries
to 100%, regardless of their type or size. By providing a unique charging profi le to each specifi c
battery type, the BCDC1220 In-Vehicle Battery Charger is able to achieve and maintain an optimal
charge in your auxiliary battery, at all times.

WARNING & SAFETY INSTRUCTIONS

This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they are supervised
or have been instructed on how to use the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.

Do NOT disassemble the BCDC1220 - the internal circuitry contains hazardous voltages.
Attempting to service the unit yourself may result in electric shock or fi re and will void the unit
warranty.

Do NOT use the BCDC1220 to charge non-rechargeable batteries. Doing so may result in harm to
the user and/or damage to the BCDC1220. Only use the BCDC1220 for charging Standard Lead
Acid, Calcium content, Gel & AGM type 12V batteries.

All lead acid batteries produce harmful, explosive gases. The Battery should be mounted in a well
ventilated area, as far as possible from any ignition sources. Do NOT smoke when in the vicinity
of the battery under charge.

Battery acid is a harmful substance. Care should be taken when working with lead acid batteries,
if the acid comes into contact with your eyes or skin, immediately wash the affected area with
cold running water and seek medical assistance. Eye protection and gloves should be worn when
handling lead acid batteries.

The BCDC1220 will achieve best results when proper battery maintenance is regularly performed.
This includes but is not limited to checking water and specifi c gravity levels of the battery.

Warning! Check the manufacturers data for your battery and ensure that the ‘Absorption’
voltage of the profi le you select does not exceed the manufacturers recommended maximum
charging voltage. If the ‘Absorption’ voltage for your battery type is too high, please select another
charging profi le.

SAL.FOR.Instruction Manual.BCDC1220 - DOC480 – Version 3

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CONTENTS

Table of Contents Page

Warnings and Safety Instructions 01
Contents 02
Specifi cations 02
1 Product Function 03

1. Operation 03

2. Turn On/Off Thresholds 03

3. Display Panel 04
2 Installation 04

1. Wiring 06
3 Two Year Warranty 10

Specifi cations

BCDC1220

DC Input Voltage Range 9V-32V

Gel/AGM Std Lead Acid Calcium Content

Absorption Voltage 14.5V 14.9V 15.3V
Float Voltage 13.3V 13.3V 13.3V
No Load Current <100mA
Standby Current <5mA
Input Fuse Rating 12V/24V 30A/20A (Not supplied)
Output Fuse Rating 30A (Not supplied)
Output Power 300W
Ambient Temperature -20°C to +80°C
Minimum O/P Battery Volts 3V
Weight 450g
Dimensions 100x120x37mm
Warranty 2 years
Standards CE, C-Tick, AS/NZS CISPR11:2004

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1 PRODUCT FUNCTION

The BCDC1220 is a multi stage, 12V, 20A, DC-DC battery charger that operates from an
input of either 12V or 24V nominal. The input voltage of the BCDC1220 can be above,
below or equal to the output voltage making it ideal for charging from a 24V vehicle or
charging an auxiliary 12V battery where the distance from the main battery may cause a
signifi cant voltage drop.

1.1 Operation

When the BCDC1220 is turned on, it will move into the bulk charging stage called
Boost stage. Boost stage maintains a constant current until the battery voltage
reaches its set point. The current in Boost stage may vary during operation in
order to maintain safe operating temperature.
The charger will then move to Absorption stage. This stage maintains a constant
voltage level for a predetermined period of time or until the current being drawn
by the output drops to less than 4A for 30 seconds; after which the charger will
enter Float stage.
Float stage maintains 13.3V on the output battery, keeping the battery topped up.
This counteracts the battery’s self discharging. When a load applied to the battery
causes it to lose charge, the charger will move back into Boost.

1.2 Turn On/Off Thresholds

Low voltage conditions (open
circuit, tested every 100s)

Low voltage conditions (loaded,
constantly tested)

12V 24V

Turn ON above 13.2V Turn ON with Ignition

Turn OFF below 12.7V Turn OFF with Ignition

Turn OFF instantly below 8VTurn OFF instantly below

8V

Turn OFF after 20 secs
below 9V

Over voltage shutdown Turn ON below 32V Turn ON below 32V

Turn OFF instantly above

32.5V

Turn OFF after 20 secs
above 32.1V

Under voltage shutdown Shutdown if Output Battery < 4V

Turn OFF after 20 secs
below 9V

Turn OFF instantly above

32.5V

Turn OFF after 20 secs
above 32.1V

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