Dometic BUTTNER MT BCB25/20, Installation And Operating Manual, Page: 15 / 152

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• Use for purposes other than those described in
this manual
Dometic reserves the right to change product
appearance and product specifications.
Technical description
General description
The device charges with 20 A at the 230 V mains
and 25 A while driving.
If neither of these charging sources is available, the
integrated pulser takes care of battery mainte-
nance.
The battery control booster has 3 operating
modes:
• Mains operation: Charging of the house battery,
trickle charging of the starting battery and sup-
ply of 12 V appliances from the 230 V mains.
• Booster operation: Charging of the house bat-
tery by the alternator via starting battery while
driving.
• Pulsing operation: The pulser can be activated
when no charging source is available to protect
the battery from sulfation.
The battery control booster offers the following
functions:
• Microprocessor-controlled, temperature-com-
pensated IU0U charging programs for various
battery types
• Auxiliary charging output for the starting battery
• Buffer operation: Compliance with the charging
characteristics even when the battery is charged
with consumers connected
• On-board mains suppression filter: Ensures par-
allel operation of the battery control booster
with other charging sources, for example mains
supply chargers or generators
• Automatic compensation of voltage loss caused
by the charging cable length (house battery)
The battery control booster has the following pro-
tective mechanisms:
• High voltage shutdown
• Low voltage shutdown
• High temperature protection
• Low temperature protection (only LiFePO4
batteries)
• Protection against short circuit
• Reverse polarity protection (only for house
battery connection)
The battery control booster can be adapted to dif-
ferent battery types via DIP switches (see chapter
“Setting the charging program” on page 21).
The temperature sensor monitors the battery tem-
perature during the charging process (see chapter
“Temperature sensor” on page 18).
The battery control booster is equipped with a
removable display panel for remote control.
Description of the device
Connections and controls
No in
fig.
1
,
page 3
Designation
1 Connection cable
2 Display panel
3 DIP switch
4 Connections and controls
5 Rubber feet
6 Temperature sensor
7 Extension cable (5 m) with adapter for dis-
play panel used for remote control
8 Wire harness with distribution block and
load relay (normally closed, 12 V/100 A)
No in
fig.
2
,
page 3
Designation Description
1 DIP switches Setting of the charging
program (see chapter
“Setting the charging pro-
gram” on page 21) and
other functions
2 T T terminal 2 connections for tem-
perature sensor