19
Installation
Fig. 35
4.9.2 Battery connection
The machine's 12V connection cable is con-
nected (observing correct polarity) to plug-in-
contacts. The wiring for the 12V heating ele-
ment (refer to A, B wiring diagram connecti-
ons) must be direct and by the shortest possi-
ble route to the battery or electric generator.
Cable cross sections and cable lengths :
Motor
caravan & Caravan (inside)
4 mm
²
< 6 m
6 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, pg. 22) 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!
Fig. 36
4.9.3 Cable connections
Position of the control electronics :
The power supplies for electronics and hea-
ting element are connected directly at the
plug-in contacts of the electronics.
For MES and AES it is compulsory to provi-
de a permanent 12V DC supply at the termi-
nals C/D (permanent voltage supply for
functional electronics).
