12
Voutputs
Consumer
The
output to the consumers (fig.
4,
pos.
7,
contact 1 to
3)
only carry +
12
V,
if the user relay
has
switched on.
The
consu-
mer relay only switches
if
there
is
a control current of +
12
V
on the contact no. 4
of
the 7-pin plug (fig.
4,
pos.
8).
The
con-
sumer circuits are each fitted with a 20 A fuse.
Heating and immediate light
Heating and immediate light are supplied independently of the
consumer
relay.
They are connected to the continuous current
(contact
4)
and fitted with a 20 A fuse.
Water pump
The
freshwater pump (contact
5)
is
supplied via the pump
relay.
lt
is
protected with a 10 A fuse. This circuit
is
regulated
from the control panel
via
contact no. 7 of the 7-pole plug
(fig
4,
pos
8).
Charging process
Supply battery charging process {battery
II)
The
power supply
has
electronic protection against polarity
inversion.
The
charging current
is
only released once the bat-
tery
is
correctly connected and a minimum voltage of 1.5 V
is
applied. While it
is
being charged, the battery voltage
is
monitored constantly by way of the B+ measuring line.
The
charging process follows the charging characteristic
curve, with minimal energy loss (for the charging characteris-
tic curve, fig.
7).
Bulk phase
(all
voltage values with respect to a battery temperature of
20
°C)
Charging with maximum constant charging current until the
battery reaches 14.4
V.
lf
the charging current drops below
90
%
of
the rated current during this phase due
to
the internal
resistance
of
the battery and cable resistance, the absorption
phase
is
started.
Absorption phase
(all
voltage values with respect to a battery temperature of
20
°C)
The
charging voltage
is
held at a constant 14.4 V for ten
hours for gel or AGM batteries; for liquid electrolyte batteries,
this voltage
is
held for four hours. After this time, the device
switches to the charge phase.
lf
during this period the current
rises
to
more than 90 % of the nominal current while the bat-
tery voltage falls
to
below 13.2 V for a period of
15
minutes
with liquid-electrolyte types or more than
two
hours with gel
or AGM batteries, the unit will automatically switch back
to
the main charging phase.
Float phase
(all
voltage values with respect to a battery temperature of
20
°C)
The
charging voltage
is
set to 13.8
V.
At
the same time, the
charging current drops
to
the value necessary for the equalis-
26 @
Refrigerator absorber operation
A
liJ
K
Fig.
5:
Changeover switch (fig.
4,
pos.
4)
in
A-Absorber
operation position.
When the engine
is
running, the refrigerator
is
supplied with
power
via
the generator of the vehicle. After the engine
is
switched oft, the refrigerator relay disconnects the refrigera-
tor from the supply battery.
The
control action
is
via the cable
from the D+ of the generator. Thus, operating the refrigerator
at
12
V
is
only possible during journeys. When the vehicle
is
parked, the refrigerator
can
only
be
run on gas or mains
voltage.
This prevents the supply battery running down. This
circuit (contact
6)
is
protected by a 20 A fuse.
Refrigerator compressor operation
A
[il
K
Fig.
6:
Changeover switch (fig.
4,
pos.
4)
in
K - compressor operation position.
The
refrigerator
is
supplied with continuous current if the main
switch on the operating panel
is
switched on.
@ 25
ing charge of the battery.
lf
the charging current rises to its
rated value due to a user and the battery voltage remains
below 13.2 V for at least
two
minutes, then the device switch-
es
back
to
the bulk phase.
Parallel operation
lf during the absorption or float phase, current
is
consumed, it
is
recharged immediately.
Starter battery charging process {battery
1)
-
Parallel circuit
Driving operation
During driving operation, the starter battery (battery
1)
is
charged by the generator of the vehicle. As long
as
the alter-
nator
is
running and the voltage at D+ input
of
the electrical
power supply rises above
13.
7
V,
the supply battery and the
starter battery are switched
in
parallel.
The
supply battery
is
now
charged by the generator. lf the voltage at D+ input
of
the electrical power supply falls below 13.2
V,
the parallel
switching
is
stopped again.
Mains operation
(all
voltage values with respect to a battery temperature of 20
°C)
When connecting
to
the mains
of
230
V,
the supply battery
is
charged first. Once the supply battery reaches a voltage of
14.3
V,
it
is
switched
in
parallel with the starter battery. lf the
charging current rises to its rated value due to a user and the
battery voltage falls below 13.2
V,
then the parallel connection
is
automatically disconnected.
The
starter battery thus always
remains ready
to
start.
Solar operation
When connecting external solar cells, the starter battery
is
also charged provided that the voltage of the supply battery
has
reached 14.3
V.
lf
the voltage of the supply battery drops
below 13.2
V,
the parallel circuit
is
disconnected again.
To Next Page
Loading...
