Dometic BUTTNER MT BCB25/20, Installation And Operating Manual

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I
Observe the following instructions when connect-
ing the battery control booster:
• Select the appropriate connection variant.
Legend
• Always connect the battery control booster
before connecting the batteries.
• Do not use ferrules. Strip the cable ends as fol-
lows:
– Signal cable 9 mm (0.75 – 1.5 mm²)
– Charging cable 12 mm
➤
Determine the cable cross-section:
Connection variant A (fig.
c
, page 7)
Connection variant for vehicles that are to be
equipped with a house battery and charging
device.
• The maximum charging current while driving is
25 A.
• When connected to the mains, the current for
charging the house battery and trickle charging
the starting battery is limited to 1 A.
I
1. Slide the DIP switch (fig.
2
1 , page 3) to the
position “D+”.
2. To connect the battery control booster pro-
ceed as shown in fig.
c
, page 7.
Connection variant B (fig.
d
, page 8)
Connection variant for vehicles with a cutoff relay
present.
• If connected consumers draw a higher current
than 25 A from the house battery (e.g. air-condi-
tioning operation while driving) the cutoff relay
remains closed to enable charging currents
higher than 25 A. After falling below this current,
the relay is opened.
• For LiFePO4 batteries: The cutoff relay remains
opened if the temperature reaches <0 °C or
>50 °C.
• When connected to the mains, the current for
charging the house battery and trickle charging
the starting battery is limited to 1 A.
I
1. Slide the DIP switch (fig.
2
1 , page 3) to the
position “D+”.
2. Connect the cutoff relay to the TR terminal.
3. To connect the battery control booster pro-
ceed as shown in fig.
d
, page 8.
NOTE
For Dometic Büttner LiFePO4 batteries:
To ensure measuring the internal tem-
perature of the LiFePO4 battery use the
temperature sensor connector to
connect the probe of the temperature
sensor to the negative terminal of the
house battery.
House battery
Starting battery
Cable
cross-section
Cable length
START+
BORD+
Cable length
COM–
to house
battery
4 mm² – 0.5 – 2.0 m
6 mm² <5.5 m 1.5 – 3.5 m
10 mm² <9.0 m 3.0 – 6.0 m
NOTE
• If the battery control booster is acti-
vated via terminal 15, the starting bat-
tery can be discharged when the
ignition is switched on and the engine
is not running. Use a D+ active simula-
tor if no D+ signal is available.
• The load relay (NC 12 V/ 100 A) with
installation cable set is not required.
No in
fig.
c
,
page 7
Description
1 Ground (chassis) or negative terminal of the
house battery
2 Temperature sensor probe
NOTE
The load relay (NC 12 V/ 100 A) with
installation cable set is not required.