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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 bat-
tery. 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.
Maintenance
The power supply must always be disconnected before
performing any maintenance work on the device.
Clean the device and the ventilation slits with a dry and fluff-
free cloth.
Battery care
(also maintenance-free batteries)
The following points should be observed to extend the battery
life:
Batteries should be fully charged before and after they have
been used,
disconnect from the power circuit in the case of longer
standstills (e.g. with a circuit-breaker or by disconnecting
the battery terminal),
in the case of longer standstill periods, the battery must be
disconnected and charged for 24 hours at the latest every
12 weeks.
Store fully charged batteries in a cool but frost-free place
during the winter and recharge regularly (every 12 weeks).
Disposal
The device must be disposed of in line with the administra-
tive regulations of the respective land in which it is used.
National regulations and laws (in Germany, for example,
the Altfahrzeug-Verordnung [old vehicle directive]) must be
observed.
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