Installation - Mounting; Installation & Wiring - Projecta DC20 Instruction Manual

INSTALLATION – MOUNTING
1. Disconnect the negative battery cable (Earth) from the vehicle's starting battery or disconnect
power to the trailer.
Note: To prevent the loss of vehicle electronic memories, radio presets & security codes,
it is recommended that an "Electrical System Memory Protector" be used.
2. Mount the DC20 using the 'side extrusions' of the unit. Mount to a flat surface in a convenient
location as close to the output (auxiliary) battery as possible. The DC20 enclosure is
weatherproof, but should be protected from rain and submersion. Keep the DC20 as far away as
possible from the exhaust manifold, turbo or any other high temperature components.
DO NOT MOUNT ON THE ENGINE
INSTALLATION – WIRING
To make the electrical connections, battery cables will need to be made to the correct length
using cable lugs and heatshrink. Cable lugs should be crimped or soldered to the stripped
battery cable and then protected with the heatshrink.
The input cable should be able to handle 28.5 Amps and have maximum voltage drop of 2V. For
lengths up to 12 metres we recommend using 6mm cable (4.58mm²).
Output cable should have a maximum voltage drop of 0.25V. See table below for the
recommended cable size per length.
1. Disconnect the negative battery cable (Earth) from the vehicle's starting battery or disconnect
power to the trailer.
Note: To prevent the loss of vehicle electronic memories, radio presets & security codes, it is
recommended that an "Electrical System Memory Protector" be used.
2. Connect the Auxiliary Battery positive (+) terminal to the DC20 positive (+) output terminal.
Fit a 25A fuse to the cable as close as possible to the Auxiliary Battery positive (+) terminal.
Note: Do not over-tighten the terminal studs on the DC20.
3. Connect the Auxiliary Battery negative (-) terminal to the DC20 negative (-) output terminal.
Alternatively connect both negative (-) terminals (Aux Battery & DC20 Output) to chassis ground.
4. Connect the DC20 negative (-) input terminal to chassis ground.
5. Connect the Starter Battery positive (+) terminal to the DC20 positive (+) input terminal.
Fit a 40A fuse to the cable as close as possible to the Starter Battery positive (+) terminal.
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