Draining The Boiler; Initial Start-Up; Filling The Fuel Lines; Start-Up - Truma Combi D 6 Operating Instructions Manual

Draining the boiler

The boiler must be drained if the motor home / caravan
is not being used during the frosty period.
– 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 safety/drain valve.
– Open safety/drain valve
(see "Opening the safety/drain valve").
The boiler will now be drained directly to the outside via
the safety/drain valve. Check whether all of the water in the
boiler (10 litres) has been drained into the container via the
safety/drain valve.
No claims may be made under the warranty for damage
caused by frost.

Initial start-up

(or when the fuel tank has run empty)

Filling the fuel lines

The heater normally has to be started up several times to fill
the fuel lines if an automatic filling device is not being used.
Check to make sure the cowl is unobstructed. Remove any
covers that may be present.
Switch off unit at control panel. The unit automatically
performs 2 starting 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 or one of our authorised service partners (see
www.truma.com).
Check fuel lines and connections for leaks after filling the fuel
lines.

Start-up

Combi D 6
The interior can be heated either with or without water, de-
pending on the setting.
Combi D 6 E
The interior can be heated in diesel, 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 900 W (3.9 A) or 1800 W (7.8 A) that
have been selected using the power selector switch.
The cable drum must be fully unwound in order to prevent
the power cable from overheating.
– Check to make sure the cowl is unobstructed. Remove any
covers that may be present.
– Fill boiler with water if necessary (see "Filling the boiler").
– Switch on the unit on the control panel.
16

Switching off

– Switch the heater off on the control panel.
– The switch-off procedure may be delayed by several min-
utes because of internal heater operations.
Always drain water contents if there is a risk of frost!

Maintenance

Only original Truma parts may be used for maintenance and
repair work.
– Even out of season, the heater should be operated once a
month for about 10 minutes.
– The safety/drain valve (FrostControl) must be operated regu-
larly (at least twice annually) to remove limescale deposits
and to be certain that it is not blocked.
To sterilize the boiler we recommend "Certisil-Argento".
Other products – particularly those containing chlorine – are
unsuitable.
The effectiveness of the use of chemicals to combat micro-
organisms in the appliance can be increased by heating the
water in the boiler to 70 °C at regular intervals.
Combi D 6 E
– Select diesel mode.
– Set the water temperature to 60 °C.
– Switch on the appliance.
Once the water in the boiler has reached a temperature
of 60 °C, the burner will switch off. The appliance must
stay switched on for at least 30 minutes and no hot water
may be removed. The residual heat in the heat exchanger will
heat the water up to 70 °C.

Fuses

Fuses 12 V

The fuses are located in the electronics, beneath the connector
cover. When replacing a fuse, be sure to use the same type.
Appliance fuse: 10 A – slow-acting – 5 x 20 mm (T 10 A)
Burner fuse: 20 A – slow-acting – 6.3 x 32 mm
Figure 4
T 20 A
T 10 A