Application Purpose; Improper Use; Description; Connections - Truma BC 860 IU Operation Instructions Manual

Application purpose

The automatic charger may only be used to charge 12 V lead
accumulators comprising 6 individual cells (e.g. car battery),
with a capacity of 200 – 600 Ah. It can be used universally and
is designed for continuous use or parallel mode. This auto-
matic charger has been designed to work best with gel, AGM
or liquid electrolyte batteries. The device is designed for instal-
lation in caravans, campers and boats.
Improper use
Do not use for 6 V batteries or non-chargeable batteries!
The automatic charger may not be used to charge 6 V lead ac-
cumulators. If batteries with a rated voltage of 6 V are charged
with the automatic charger, gassing occurs immediately
which creates an explosive detonating gas.
The automatic charger may not be used to charge non-
chargeable batteries and / or nickel-cadmium batteries.
If the automatic charger is used to charge these batteries, the
case can burst explosively.

Description

The automatic charger contains state-of-the-art microproces-
sor-controlled charging technology. This technology allows
high performance whilst remaining lightweight and small.
Thanks to the top quality electronics, it works highly efficiently.
The automatic charging process is gentle to the battery and
prevents damaging overcharging, which in turn significantly
extends the service life of the battery. After the battery and
mains supply have been connected, the automatic charger is
ready for use.
The automatic charger is designed for continuous operation
and parallel mode. Consumers can be continuously connected,
switched on or disconnected. Consumers are supplied and
the battery charged at the same time. The consumer current
here should be smaller than the maximum charging current as
otherwise the battery will not charge.
Using a charging control panel, e.g. the Truma Panel BC (430,
630, 860), the individual charging phases of the battery and
any malfunctions of the charger can be displayed.
If the automatic charger is operated in conjunction with a tem-
perature sensor for the battery I – MASTER –, the automatic
charger regulates the charging current automatically depend-
ing on the operating temperature. This ensures particularly
effective and gentle charging of the battery. If a temperature
sensor is not used, the automatic charger regulates the charg-
ing process in the same way as a battery temperature of
20 °C.
The device is designed for operation in an ambient tempera-
ture of up to 50 °C. Should the internal temperature of the
charger exceed 50 °C, as a result of insufficient air circulation
or an excessively high ambient temperature, the charging cur-
rent is automatically reduced to 2/3; if the temperature rises
above 70 °C the charger will switch off.

Connections

Fig. 1: Connections
1 Output + charging line battery III
2 Output - charging line battery III
3 Output + charging line battery II
4 Output - charging line battery II
5 Output + charging line battery I – MASTER –
6 Output - charging line battery I – MASTER –
7 Low heat device socket connection 230 V ~
8 Button has no function
9 Connection for temperature sensor
10 Connection for CAN BUS
11 Changeover switch gel or AGM (OPTIMA® YT S) /
liquid electrolyte battery
12 Connection for charging control panel
Charging process
The charging current is only released if the battery is correctly
connected and there is a minimum voltage of 1.5 V. Up to
3 batteries can be connected simultaneously; however, the
total charging current (60 A max.) must not be exceeded.
The charging process is carried out in accordance with the
charging reference line with a minimum of performance loss
(Charging reference line, see figure 2).
Main charging phase
(all voltage values relate to a battery temperature of 20 °C)
Charging with maximum constant charging current until a bat-
tery voltage of approximately 14.4 V is reached. If in this range
of the main charging phase, the charging current falls below
90 % of the rated current due to internal battery resistance
and resistivity, the afterloading phase is started.
Afterloading phase
(all voltage values relate to a battery temperature of 20 °C)
The charging voltage is kept at a constant 14.4 V for a period
of 10 hours for gel / AGM batteries or four hours for liquid
electrolyte batteries. At the end of this period, it changes to
the trickle current phase. If during this period, the current
increases to over 90 % of the rated current and if at the same
time the battery voltage drops to below 13.2 V for a period of
more than 15 minutes for liquid electrolyte batteries and more
than two hours for gel batteries and AGM, it switches back to
the main charging phase.
Trickle charging phase
(all voltage values relate to a battery temperature of 20 °C)
The charging voltage is set to 13.8 V. The charging current
drops to the equalizing charge value necessary for the battery.
If due to the consumer, the charging current increases to
its rated value and if the battery voltage drops for at least
2 minutes below 13.2 V, the device switches back to the main
charging phase.
Parallel mode
If consumer current is used during the aftercharging phase or
the trickle charging phase, this is immediately recharged.
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