19
24V/12V-System in Trailer/Box
For a better understanding of how the system is programmed first read the Programming the system
steps on page 8. Otherwise the system may need to be reinstalled.
Read the notes for the mounting and wiring extension on page 11 before starting the installation.
Please read Instructions carefully prior to installation.
Choice of light blue connection
IGN
:
With alternators (smart alternators) that cut off charge temporarily, connect IGN wire to Car Ignition
(Terminal 15). When the alternator turns off, the DBM20A keeps charging until the Main voltage
drops below 23.8V or the alternator kicks in again.
With all other alternators do not connect the light blue (IGN), DBM20A stops charging when the
Main voltage drops below 25.3V. The DC/DC Charging automatically starts when Main voltage is
higher than 26.2V.
1.
If needed
connect the light blue IGN wire on Car Ignition (Terminal 15) with a plug, otherwise leave
unconnected.
2. Connect all black GND wires.
3. Connect now the red wire (+main) as well with a plug (Brad Harrison) (
ATTENTION:
system is
starting up -> refer to page 6
Programming the system
).
(Continue installation only after
System has switched to Stand-By mode)
4. Connect the blue wire (+aux)
last
.
Notice
For a safe installation it is necessary to install the fuses in the red wire path (+ main: 30A)
and in the blue wire path (+ aux: 30A)!
Red (+main) wire always on main battery with 24V!
