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Draining the hot water system
If the motor home / caravan is not used during the
winter, the hot water system must be drained! No
warranty claims for frost damage will be accepted.
– Switch off the power to the pump assembly (main switch or
pump switch).
– Open hot water taps in kitchen and bathroom.
In order to check the water that is flowing out, place an
appropriate container (capacity 10 litres) beneath the
drainage socket (d) of the drain valve.
– Open drain valve
(see "Opening the drain valve").
The hot water system is now drained directly to the outside
via the drain valve. Check whether all of the water in the hot
water system (10 litres) has been drained into the container
via the drain valve.
Start-up
The use of the installed control panel is described in
separate operating instructions.
The interior can be heated in gas, electrical or mixed mode,
either with or without water, depending on the setting.
Check whether the power supply fuse protection at the camp
site is adequate for the 980 W (4.1 A) or 1960 W (8.1 A) that
have been selected.
The cable drum must be fully unwound in order to prevent the
power cable from overheating.
– Check to make sure the cowl is unobstructed. Be sure to
remove any covers that may be present.
– Open gas cylinder and quick-acting valve in gas supply line.
– Fill hot water system with water if necessary (see "Filling
the hot water system").
– Switch on heater at control panel.
Switching off
– Switch off heater at control panel.
The switch-off procedure may be delayed by several
minutes because of internal heater operations.
Always drain water if there is a risk of frost!
If the heater is not going to be used for a long period of time,
close the quick-acting valve in the gas supply line and turn off
the gas cylinder.
Maintenance
Only original Truma parts may be used for maintenance and
repair work!
Servicing should be carried out only by authorised
personnel.
Please contact Dometic Service Centre for service and repairs.
– The drain valve must be actuated regularly (at least twice
per year) in order to remove limescale deposits and to ensu-
re that it is not blocked.
Biofilm, deposits and limescale must be removed using
chemicals to protect the unit from infestation by microorgan-
isms. Only chloride-free products must be used in order to
prevent damage to the unit.
The effectiveness of the use of chemicals to combat micro-
organisms in the unit can be increased by heating the water
in the hot water system to 70 °C at regular intervals.
– Select "Gas" mode.
– Set water temperature to 60 °C.
– Switch on device.
Once the water in the hot water system has reached a
temperature of 60 °C, the burner will switch off. The unit
must stay switched on for at least 30 minutes and no warm
water may be removed. The residual heat in the heat exchang-
er will heat the water up to 70 °C.
Fuses
Fuse 12 V
The fuse is in the electronics beneath the connection cover.
Replace the unit's fuse only with an identical fuse.
Device fuse: 10 A – slow – 5 x 20 mm
Fig. 5
Fuse 240 V
The fuse and the power supply lines must only be replaced by
an expert!
The unit must be disconnected from the mains (all
poles) before opening the electronic housing lid.
The fuse is in the power electronics (16) beneath the
electronic housing cover.
This fine fuse must always be replaced with a fuse of the
same type: 10 A, slow, interrupting capacity "H".
Fig. 6
T 10 A
14
T 10 A
7
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