5
The unit automatically selects the required power level
according to the temperature difference between the setting
on the control panel and the current room temperature.
After reaching the room temperature set on the control pan-
el, the burner will switch off. The warm-air fan will continue
to run at a low speed as long as the blow-out temperature
(on the unit) is higher than 40 °C.
If the boiler is filled, the water will automatically be heated
at the same time. The water temperature is then dependent
on the heating output being given off, and the duration of
heating required to reach the desired room temperature.
– Heating with drained water system
Set the rotary switch to the operational setting “d”.
Turn the rotary switch (a) to the desired thermostat setting
(1 – 5). The green LED (b) for operation is lit and simultane-
ously indicates the position of the selected room tempera-
ture. The yellow LED (g) will be lit only when the tempera-
ture of the unit is below 5 °C!
The unit automatically selects the required power level
according to the temperature difference between the set-
ting on the control panel and the current room temperature.
After reaching the room temperature set on the control
panel, the burner will switch off.
Switching off
Use the rotary switch to switch off heater (position f).
The green LED (b) goes off.
If the green LED (b) blinks after switching off, then the
unit‘s after-running is active in order to reduce the unit‘s
temperature. This will end after a few minutes and the green
LED (b) will go off.
Always drain water contents if there is a risk of frost!
Red / yellow LED “failure”
A failure is indicated when the red LED (h) shines or when the
red (h) or yellow LED (g) flashes.
Please consult the Trouble-Shooting list for possible causes.
A reset (fault reset) is carried out by switching off, waiting
until all LED’s on the control panel have stopped flashing, and
then switching the heater on again.
If the window, to which a window switch is mounted, is
opened, the heating device stops operating and the yel-
low LED (g) flashes 3 times. The heater continues operating
when the window is closed.
Filling the water heater
Check that the drain valve in the cold water intake is closed:
Lever should be in horizontal position, position (k).
m
k
k
k = Lever position “Closed”
m = Lever position “Drain”
Switch on the power for the water pump (either by the main
switch or the pump switch).
Open hot water taps in kitchen and bathroom, (set preselect-
ing mixing taps or single-lever fittings to “hot”). Leave the
fittings open for as long as it takes for the boiler to displace
the air and fill up, and the water to flow without interruption.
If only the cold water system is operated, without the
boiler, the boiler still fills with water. To avoid frost dam-
age, the boiler must be drained through the drain valve, even
if it was not operated.
When connecting to a central water supply (rural or city
mains), a pressure reduction valve must always be in-
stalled to prevent pressures above 2.8 bar from developing in
the water heater.
Draining the water heater
Switch off the power for the water pump (either by the main
switch or the pump switch).
Open hot water taps in kitchen and bathroom.
Open safety/drain valve: Lever in vertical position, position (m).
The boiler is now drained directly to the outside via the drain
valve. Place a bucket beneath the outlet to check whether the
water content has completely drained away (10 litres). There
shall be no claims under guarantee for damage caused
by frost!
Maintenance
Only original Truma parts may be used for maintenance and
repair work.
Clean installation area at least once per year, and have unit
checked for soiling and cleaned by an expert if necessary.
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 microor-
ganisms in the unit can be increased by heating the water in
the boiler to 70 °C at regular intervals.
To do this, turn the rotary switch on the control panel to
the 60 °C (c – summer mode) position. The green (b) and
yellow (g) LEDs light up.
Once the water in the boiler has reached a temperature
of 60 °C, the burner will switch off and the yellow LED (g)
will go out. The unit must stay switched on for at least 30 min-
utes and no warm water may be removed. The residual heat in
the heat exchanger will heat the water up to 70 °C.
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