Dometic BUTTNER MT LB30 Instructions De Montage Et De Service page 20

Determine the cable cross-section
MT LB 30
Cable
length
Cable
START
cross-
(IN) to
section
starting
battery
4 mm² –
6 mm² < 4 m
10 mm² < 7 m
MT LB 2412-25
Cable
length
Cable
START
cross-
(IN) to
section
starting
battery
4 mm² –
6 mm² < 11 m
10 mm² < 18 m
MT LB 2412-45
Cable
length
Cable
START
cross-
(IN) to
section
starting
battery
6 mm² –
10 mm² < 10 m
16 mm² < 16 m
20
Cable
length
Cable BORD
fuse ΙΙ
(OUT) to
house
battery
40 A/ 0.5 m –
50 A 1.5 m
40 A/ 1.5 m –
50 A 3.0 m
40 A/ 3 m –
50 A 5.5 m
Cable
length
Cable BORD
fuse ΙΙ
(OUT) to
house
battery
30 A 0.5 m –
2.0 m
30 A 1.5 m –
3.5 m
30 A 3.0 m –
6.5 m
Cable
length
Cable BORD
fuse ΙΙ
(OUT) to
house
battery
40 A 0.5 m –
2.0 m
40 A 1.5 m –
3.5 m
40 A 3.0 m –
5.0 m
Connection variant A (fig. c, page 7)
Connection variant for motor homes that are to be
equipped with a house battery and charging
device (standard connection variant).
I
Cable
fuse Ι
➤Install the charging booster in the connection
30 A/
between the starting battery and the house bat-
40 A
tery.
➤Disconnect the existing charging cable at a suit-
30 A/
40 A
able point.
➤To connect the charging booster proceed as
30 A/
shown in fig. c, page 7.
40 A
Connection variant B (fig. d, page 8)
Connection variant for motor homes with an exist-
ing cutoff relay.
I
Cable
fuse Ι
30 A
➤Install the charging booster between the exist-
ing cutoff relay (2) and the house battery.
30 A
➤Disconnect the existing charging cable at a suit-
able point.
30 A
➤To connect the charging booster proceed as
shown in fig. d, page 8.
Connection variant C (MT LB 30 only)
(fig. e, page 9)
Connection variant for motor homes with existing
Cable
central electrical system equipped with integrated
fuse Ι
cutoff relay and integrated charger.
I
50 A
50 A
➤Install the charging booster in the starting bat-
50 A
tery cable between central electrical system (2)
and the starting battery.
4445103799
NOTE
The charging booster replaces an exist-
ing cut-off relay. Use connection variant B
if the cut-off relay cannot be removed.
NOTE
The charging booster replaces an exist-
ing cut-off relay. Use connection
variant A if the cut-off relay can be
removed.
NOTE
For LiFePO4 batteries: Disable the inte-
grated charger if it is not equipped with
temperature-controlled charging and
the charging characteristic for LiFePO4
batteries.