Installation - Redarc BCDC1240-LV User Manual

2

INSTALLATION

1 Mount the unit to a fl at surface close to the auxiliary battery and away from any
heat sources.
NOTE: The unit will operate optimally below 55°C with good airfl ow. At higher
temperatures the unit will de-rate output current.
2 Wire into vehicle as per the applicable diagram on the next pages, and following
the steps below.
The BCDC1240-LV is connected using 6 wires, listed below:
• Source Select
• Battery Type
• Remote Indicator
• Input Battery Positive
• Common Ground
• Output Battery Positive
* Current rating is for 24V input voltage.
1. Wire the 'Common Ground' wire to a ground point that is common to both the
Start battery (or the Solar Input Ground wire) and the Auxiliary battery to be
charged. This point MUST be on the chassis of the vehicle, on the chassis of the
trailer/camper/caravan, NOT directly wired to the main battery.
2. Wire the 'Output Battery Positive' to the Auxiliary battery positive terminal. Ideally
the BCDC unit should be a maximum of 1 metre in cable length from the battery
positive terminal, and should be wired with a minimum of 7.71mm² or 8 B&S
cable.
3. Wire the 'Input Battery Positive' wire to the Start battery positive terminal via a
60A N/O ignition controlled relay, or the Solar Input Positive wire, depending on
your install. Below is a table outlining the required cable size for a given cable
install length. Always choose a wire diameter equal to or greater than what is
specifi ed below.
Cable Install Length
(m)
1 - 5
5 - 9
Blue
Orange
Green
Red
Black
Brown
Minimum Wire Size
(mm²)
6
6
50A/30A* Fuse (not supplied)
50A Fuse (not supplied)
Recommended Wire
Size (mm²)
13.56
20.28
6
Closest (BAE, B&S,
AWG)
6
4