Taking Into Operation; Summer Operation; Winter Operation; Switching Off - Truma Combi D 6 Mode D'emploi

Connect unit to control panel to do this. The unit automatically
performs 2 start attempts (initial start and repeat) per switch-
on procedure with a run time of 2 minutes in each case. If no
flame is detected after the repeat start, the unit switches to
fault and has to be switched off and on again at the control
panel.
After a total of 15 unsuccessful starting attempts (initial
and repeat start) without forming a flame, the equipment
is blocked. To remove the block, please contact the Truma
Service Centre (see Service Booklet or www.truma.com).
Check fuel lines and connections for leaks after filling the
fuel lines.

Taking into operation

Heating operation is basically possible without
restriction with or without water content.
Check to make sure the cowl is unobstructed. Remove any
covers that may be present.

Summer operation

(boiler operation only)
Move the rotary switch on the control panel to position
(c – summer operation) 40 °C or 60 °C. The green (b) and
yellow (g) LEDs light up.
After reaching the set water temperature (40 °C or 60 °C),
the burner will switch off and the yellow LED (g) will be
extinguished.

Winter operation

– Heating with water temperature monitoring
Set the rotary switch to the operational setting "e".
Set the rotary switch (a) to the desired thermostat setting
(1 – 5). The green LED (b) for operation is lit and simulta-
neously indicates the position of the selected room tem-
perature. The yellow LED (g) indicates the water's heat-up
phase.
The unit automatically selects the required power level ac-
cording to the temperature difference between the setting
on the control panel and the current room temperature.
Once the room temperature set on the control panel has
been reached, the burner switches back to the lowest stage,
and heats the water content to 60 °C. The yellow LED (g)
will be extinguished after the water temperature is reached.
– Heating without water temperature monitoring
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 – water's heat-up phase) will be lit
only when the water temperature is below 5 °C!
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 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.

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 if the rotary switch for the drain valve (FrostControl)
is set to "Operation", meaning that it is parallel to the water
connection and engaged.
Close the drain valve by pushing the push button until it
engages.
When the temperature at FrostControl is below about
7 °C, first switch on the heater to warm the installation
compartment and FrostControl. After a few minutes, if the
temperature around the FrostControl is more than about 7 °C,
the drain valve can be closed.
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.
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