23
Installation
Fig. 46
4.8.2 Battery connection
The machine's 12V connection cable is con-
nected (observing correct polarity) to a termi-
nal strip (RMF 85x0) or plug-in-contacts (RMF
85x1, 85x5). The wiring for the 12V heating
element (refer to A, B wiring diagram connec-
tions) must be direct and by the shortest pos-
sible route to the battery or electric generator.
Cable cross sections and cable lengths :
Motorcaravan & Caravan (inside)
6 mm
²
< 6 m
10 mm
²
> 6 m
Caravan (outside)
min 2,5 mm
²
(EN1648-1)
2,5mm²
Provide a 20 A fuse to protect on-board 12V
circuit.
In order to ensure that the 12V power supply is
shut off when stopping the engine (otherwise
the battery would discharge within a few
hours), perform the power supply to the 12V
heating element (connection A/B in wiring dia-
gram) in a way to have the 12V supply only live
while the vehicle ignition is switched on.
The connection C/D (interior light, electronics)
must be permanently provided by a 12V DC
power supply to be protected by a 2A fuse.
If the appliance is installed in a caravan
the respective leads for the 12V+ and 12V-
connections A/B and C/D must not be
connected to each other on the caravan-
side (EN 1648-1).
CAUTION!
4.8.3 D+ and solar connection (only
for AES models)
D+ signal connection :
In >Automatic Mode< the AES electronic
system automatically selects the most efficient
energy supply. In automatic mode the electro-
nic system uses the D+ signal (dynamo +) of
the alternator to detect 12V DC. 12V DC ope-
ration is selected only while the engine is run-
ning in order to prevent battery discharge.
S+ signal connection :
12V DC energy can be optionally achieved by
mounting solar equipment to the vehicle. The
solar power equipment must be provided with
a solar charging controller with AES output
(adequate charging controllers available in
selected stores). The "S+ connection (Solar +)
must be connected to the respective terminal
of the solar charging controller (AES output).
The electronic system uses the S+ signal of
the solar charging controller to detect solar
12V DC.
Cable cross-sectional areas:
There are no particularly high current flows via
the D+ and S+ connection; therefore no parti-
cularly large cross-section is required for these
connections (approx. 1mm² is sufficient).
