Charger is installed as per these installation instructions. REDARC recommends that the Charger be installed by a suitably qualified person. Disclaimer: REDARC accepts no liability for any injury, loss or property damage which may occur from the improper or unsafe installation or use of its products.
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2. Do NOT alter or disassemble the Battery Charger under any circumstances. All faulty units must be returned to REDARC for repair. Incorrect handling or reassembly may result in a risk of electric shock or fire and may void the unit warranty.
3 SPECIFICATIONS Part Number BCDC1220 and BCDC220-IGN Continuous Current Rating 20 A Vehicle Input Fuse Rating 40 A (Not Supplied) REDARC FK40 recommended Output Fuse Rating Output Power 300 W 9 to 32 VDC ⎓ DC Input Voltage Range Output Battery Type...
The BCDC1220(-IGN) is a three-stage, 12 V, 20 A DC-DC Battery Charger that operates from an input of either 12 V or 24 V nominal. The input voltage of the BCDC1220 can be above, below or equal to the output voltage, making it ideal for charging from a 24 V vehicle or charging an auxiliary 12 V battery where the distance from the main battery may cause a significant voltage drop.
CHARGING PROCESS BOOST The Boost stage maintains a constant current until the battery voltage reaches its Absorption Voltage. The current in Boost stage may vary during operation in order to maintain safe operating temperature, or to limit the difference between input and output voltages. ABSORPTION The Charger will then move to Absorption stage which maintains a constant voltage level for a predetermined period of time or until the current being drawn by the output battery drops to less...
TURN ON/OFF THRESHOLDS 24 V BCDC1220 & 12 V BCDC1220 BCDC1220-IGN BCDC1220-IGN Input Open 12.9 V 12.0 V With Ignition Turn ON above Circuit Low voltage Turn OFF above 12.7 V 11.9 V With Ignition conditions Turn OFF Input Loaded...
Unit will de-rate output current. NOTE: Appropriate connections must be made to the wires with a continuous current rating of at least 20 A for the BCDC1220(-IGN). Failure to do so may cause damage to the Unit and vehicle. CABLE SIZING Below is a table outlinging the required cable size for a given cable install length.
The wires on the BCDC1220 and BCDC1220-IGN Unit carry peak currents of up to 30 Amps and it is important to make a good, low resistance, electrical connection that will not degrade over time.
Figure 5: Ensuring a good wiring connection Crimp both wires to the butt splice using Solder the wires to the butt splice. Ensure that single-indent type crimpers. Fold the cable over a good connection is made. before inserting into the butt-splice as required. Keep heatshrink away until after soldering is Single-indent crimpers should also be used on complete and has cooled.
CHARGE PROFILE SELECTION — ORANGE WIRE Connect the ORANGE wire to set the Maximum output voltage to suit your selected Charge Profile. Figure 8: Setting the Maximum Voltage (ORANGE wire) PROFILE A Leave the ORANGE wire disconnected to set the Maximum voltage to 14.6 V*. PROFILE B Connect the ORANGE wire to Common Ground to set the Maximum voltage to...
Alternatively, the BLUE 'input trigger' wire can be connected to the vehicle ignition. NOTE: To charge from a 24 V alternator, the BLUE input trigger wire must be connected to the vehicle ignition. Figure 10: BCDC1220 BLUE wire with the 12 V or 24 V Starter Battery 12 V Starter Battery Connect the BLUE wire to vehicle ignition.
5.10 TYPICAL SETUPS REDARC recommends that the Charger be installed by a suitably qualified person. Figure 12: BCDC1220 12 V Starter Battery Installation BCDC1220 INPUT Load Fuse 30 A Fuse 30 A Fuse Auxiliury Start Charging Pro le Select Battery Battery...
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Figure 14: BCDC1220 and BCDC1220-IGN 24 V Installation BCDC1220 & BCDC1220-IGN INPUT 20 A Load Fuse Fuse 30 A Fuse Start To vehicle Battery ignition Auxiliury Charging Battery Pro le Select (refer to page 12) Start Battery All ground Loads points must be...
6 FREQUENTLY ASKED QUESTIONS The BCDC1220(-IGN) turns on at 12.9 V (12 V) and OFF at 12.7 V (11.9 V), but it can also operate down to 9 V, explain? The BCDC1220(-IGN) will turn OFF for a split second every 100 seconds to measure the unloaded voltage at the battery.
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