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Operating Instructions Booster WA 121545
Generatorvoltages
Function
Function
4
All manuals and user guides at all-guides.com
3
Application and functions in detail
The WA 121545 booster is used for optimal charging of leisure area
batteries in vehicles whilst they are moving (e.g. in motorhomes) with 12V
systems.
The following battery types can be set:
Lead-acid
F
Lead-gel
F
AGM
F
Lithium
F
A working 12V battery with a minimum capacity of 80 Ah must be con-
Y
nected for operation.
Generators with energy-saving charge strategies are often fitted in EURO 6
vehicles. The charge voltage for these generators varies greatly depending
on the driving state (between 12.6 V and 15.0 V on the MB Sprinter for
example).
Without a booster, this prevent optimum charging of the leisure area battery.
There is even a risk of discharge for a battery fully charged from the 230 V
mains for example.
Given this situation, the use of a booster in such vehicles is an absolute
necessity.
The leisure area battery connected is charged independently of the
generator voltage. The switchover to trickle charge is automatic, and
dependent on current and time. When an optionally available battery
temperature sensor is connected, the charge voltages are aligned to the
battery temperature.
For conventional generators, leisure area battery charging is also improved
greatly by using the WA 121545 booster. The charge current is very much
higher, especially for long charge cables. The use of a booster is
indispensable for AGM batteries requiring a charge voltage of 14.7 V.
The WA 121545 booster is a clocked upward/downward converter which
equalises the fluctuating generator voltage and makes available a high
charge current. When generator signal "D+" is applied to the booster, the
booster starts working automatically.
The setpoint values for the charge current, the maximum load current and
various displays are controlled by a microcontroller using software. A
connection to the SDTBUS is also realised via the microcontroller. In an
appropriate system environment, it is then possible to display more
information, such as "Charge current whilst moving", on an
SDTBUS-compatible control panel.
The very high efficiency of the booster means that very compact and
lightweight design is possible. The fan fitted is very quiet and only runs at
high capacities.
Date: 21.09.2017
8200510 BA / EN
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