Mains Connection; Commissioning; Mains Supply Mode On Ferries; Generator Mode - Truma EM 16 IU Mode D'emploi / Instructions De Montage

Temperature sensor
If you use a temperature sensor for the battery II, adhere the
temperature sensor to the face side of the battery II (starter
battery). To do this, remove the protective film from the self-
adhesive point of the temperature sensor and press it firmly
onto the desired position of the battery II (see Temperature
sensor description). Connect the cable from the temperature
sensor to the temperature sensor connection of the device
(2-pin connection – fig.4, pos. 7).
Battery type changeover switch
Set the battery type (liquid electrolyte or Gel / AGM) of your
battery on the battery switchover.

Mains connection

Provide the potential equalisation (fig. 4, pos. 3) between
the device and the mobile home or the caravan. Use a green/
yellow cable with a minimum cross-section of 4 mm². The po-
tential equalisation does not replace the protective conductor
in the mains cable.
Potential equalisation
green/yellow min. 4 mm²
connect to a conducting
part of the mobile home
Fig. 17: Mains connection / potential equalisation
Connect the 230 V output (fig. 4, pos. 2) of the power supply
with the on-board distribution of your mobile home or cara-
van. Connect the green/yellow cable to the earth circuit! The
230 V circuit breaker of the electric supply serves as mains
protection, and is connected directly on the input side to sup-
ply socket of the mobile home or caravan.
Fig. 18: 230 V output
Check that all the connections are firm and secure. As the last
step, make the mains connection via the female connector
of the mains cable (fig. 4, pos. 1). The socket on the device
is provided with a locking. When connecting the plug, make
sure that the locking engages. In order to remove the plug,
the locking must be released by lightly raising its wing.
Fig. 19: 230 V input
or the caravan

Commissioning

The power supply is operational as soon as it is connected to
the mains.
Before disconnecting or interrupting the DC voltage connec-
tions, e. g. the charging cable to the battery, the device needs
to be switched off at the mains. Disconnect the mains plug!
Batteries with short circuits may not be charged. There
is a risk of explosion caused by the generated detonat-
ing gas!
Prerequisites
The battery must have a rated voltage of 12 V and a minimum
capacity of 50 Ah. Batteries below this minimum capacity will
not be adequately charged. Batteries with capacities that are
too high will be charged too slowly. The operating voltage of
the battery must not fall below 1.5 V. No charging takes place
below this value.
Charging process
The battery is charged automatically. After any mains power
failures, the main charging process is automatically restarted.
The main charging process is stopped when the battery
voltage has reached 14.4 V. At the end of the aftercharging
phase, the charging process switches to trickle charging at a
constant 13.8 V.
Parallel operation
In parallel operation, the current drawn up by electrical equip-
ment should be less than the maximum charging current of
16 A. This is the only way to ensure that the battery is being
charged even though consumers are being supplied.

Mains supply mode on ferries

The main supply voltage on ferries can be prone to heavy fluc-
tuations. Therefore do not connect the device to this voltage.

Generator mode

Please observe the handling instructions in the manufacturer's
operating instructions. The generator must satisfy the 230 V
mains power connection values. Only connect the device to
the generator if this runs stably and disconnect the device
from this before you turn it off. The voltage peaks generated in
the start-up and shutdown phases can damage the device.
19