Charging Process; Supply Battery (Battery Ii); Starter Battery (Battery I) - Parallel Switching; Maintenance - Truma EM 16 IU Mode D'emploi / Instructions De Montage

Charging process

Supply battery (battery II)

The power supply has electronic protection against polarity in-
version. The charging current is only released if the battery is
correctly connected and there is a minimum voltage of 1.5 V.
While it is being charged, the battery voltage is monitored
constantly by way of the B+ measuring line. The charging
process is carried out in accordance with the charging refer-
ence line with a minimum of performance loss. (Charging ref-
erence line, see fig. 5).
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 14.4V 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.
Starter battery (battery I) – Parallel switching
Driving operation
During driving operation, the starter battery (battery I) is
charged by the generator of the vehicle. As long as the alter-
nator is running and the voltage at D+ input of the electrical
power supply rises above 13.7 V, the supply battery and the
starter battery are switched in parallel. The supply battery is
now charged by the generator. If the voltage at D+ input of
the electrical power supply falls below 13.2 V, the parallel
switching is stopped again.
Mains operation
(all voltage values with respect to a battery temperature of 20 °C)
When connecting to the mains of 230 V, the supply battery
is charged first. Once the supply battery reaches a voltage of
14.1 V, it is switched in parallel with the starter battery. If the
charging current rises to its rated value due to a user and the
battery voltage falls below 13.0 V, then the parallel connection
is automatically disconnected. The starter battery thus always
remains ready to start.
Solar operation
When connecting external solar cells, the starter battery is
also charged provided that the voltage of the supply battery
has reached 14.1 V. If the voltage of the supply battery drops
below 13.0 V, the parallel circuit is disconnected again.
14

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.

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.
Technical Data
Power supply
AC voltage 230 V / 50 Hz, single-phase
Range approx. 180 V – 250 V / 50 – 60 Hz
Output current (charging current battery II)
Charging current max. 16 A, arithmetic mean value, electroni-
cally controlled according to the IUoU charging reference line
Output current (charging current battery I)
When the battery potential of battery II reaches 14.1 V, a par-
allel connection is established with battery I. Compensating
current dependent on the charge state of battery I (starter
battery). If the voltage of the battery II drops below 13.0 V, the
parallel circuit is automatically disconnected.
Output voltage
DC voltage 12 V
Charging process
Automatic
Automatic switching (main charging process)
OFF at a battery voltage of 14.4 V, charging current < 16 A
Automatic switching (afterloading phase)
10 hours constant 14.4 V for gel batteries / AGM
4 hours constant 14.4 V for liquid electrolyte batteries
Automatic switching (trickle charging)
Trickle charging constant 13.8 V
Temperature-dependent control (optional)
The values of the automatic switching device refer to a battery
temperature of 20 °C. If a temperature sensor is used with the
battery II, these values will vary in accordance with the battery
temperature.
High temperature –> reduction of the threshold values
Lower temperature –> higher threshold values
Application
Parallel mode, general charging mode
Temperature
Ambient temperature from -25 °C to +35 °C
During operation, the casing may heat up to around 75 °C
Cooling
By convection
Configuration
In accordance with the VDE provisions and the device safety
law
Use
To charge the batteries with 12 V rated voltage and a capacity
of 50 – 160 Ah