79Belcanto/Trecento - 10/11 - Ausgabe 07/10 - 1976844 - BUE-0042-06EN
8.5 Electric kit (special equipment)
Scope The following components belong to the electric kit:
Battery 12 V, 90 or 110 Ah
Battery charging unit
Panel
Booster
The multi-function power supply (EVS) is a product of the most modern
switched-mode power supply technology. This technology enables high output
with low weight and small dimensions. By using top quality electronics, it works
without almost any power loss. Automatic charging is performed in a protective
manner, without a damaging overloading of the battery. This significantly
increases battery life.
The EVS is equipped with a charging output for the living area battery. When
in operation, the electronics regulator uses the B+ measurement connection
to check:
Terminal voltage of the battery
Connection of the battery for the correct polarity
The EVS has been built for parallel operation and buffer operation. Appliances
can stay continuously connected, switched on or disconnected. The appli-
ances are supplied with power and the battery is charged at the same time.
8.5.1 Appliance relay
The outputs of the appliances only conduct +12 V if the appliance relay has
turned on. The appliance relay only turns on when the external main switch is
closed. In order to achieve a greater operational comfort, the external main
switch is fitted on a Calira operating panel or in a position of your choice in the
caravan. The connection of the external main switch is described under "Con-
nection" or "Connection diagram 2".
8.5.2 Voltage regulator
When the towing vehicle is in operation, the living area battery (battery II) in
the caravan is charged by the starter battery (battery I) in conjunction with the
alternator of the towing vehicle and the refrigerator is also supplied with elec-
tricity at the same time. In order for the living area battery to reach an ideal
condition, a voltage of at least 14.2 V is necessary. This voltage is not avail-
able in the caravan in the event of power loss.
With an input voltage of between 10 and 15 V, the integrated voltage regulator
regulates the output voltage so that the living area battery is supplied with
14.2 V. It equalises fluctuations of voltage such as power loss, and automati-
cally switches the 12 V power supply to the refrigerator.
The current to the appliances must be smaller than the maximum charging
current otherwise no charging of the battery will take place.
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