Operating Instructions; Control Panels; Room Temperature Sensor; Frostcontrol - Truma Combi D 6 Operating Instructions Manual

Operating instructions

Read the safety instructions and operating instructions
carefully before starting the unit.
Operating instructions can be viewed in offline mode
with a mobile device and the Truma App. Download the
operating instructions when you have a WiFi connection and
save them on your mobile device.
Before initial use, be sure to flush the entire water supply
thoroughly with clear water.
The materials of the device that come into contact with
water are drinking water safe (see manufacturer's dec-
laration: www.truma.com – Manufacturer's Declaration).

Control panels

The control panels are described in separate operating
instructions.

Room temperature sensor

To measure the room temperature, an external room tempera-
ture sensor (2) is located in the vehicle. The position of the
sensor is determined by the vehicle manufacturer depending
on the vehicle model. More information can be found in the
operating instructions for your vehicle.
Figure 2
The temperature setting on the control panel depends on per-
sonal heating requirements and the design of the vehicle, and
must be determined individually.

FrostControl

(safety/drain valve)
FrostControl is a currentless safety/drain valve. When there
is a danger of frost, it automatically drains the contents of
the boiler through a drainage socket. If excessive pressure is
present in the system, pressure will be automatically intermit-
tently equalized through the pressure relief valve.
c
b
Figure 3
a = rotary switch position "On"
b = pushbutton position "Closed"
c = pushbutton position "Drain"
d = drainage socket
(led outside through floor of vehicle)
2
a
d

Opening the safety/drain valve

Turn the rotary switch by 180° until it engages, whereby the
pushbutton pops out (position c). The water from the boiler
drains through the drainage socket (d).
The FrostControl drainage socket (d) must be free of contami-
nation (slush, ice, leaves, etc.) at all times so the water can
drain out easily! No claims may be made under the war-
ranty for damage caused by frost.

Closing the safety/drain valve

Check whether the rotary switch is set to "On" (position a),
i.e. parallel to the water connection and engaged.
Close the safety/drain valve by pressing the pushbutton. The
pushbutton must engage in position (b) "closed".
Only when the temperature at the safety/drain valve is above
approx. 7 °C can it be closed manually with the pushbut-
ton (position b) and the boiler filled.
Truma supplies a heating element (part no. 70070-01) as an
accessory, which is plugged into the FrostControl and fixed in
place with a retaining bracket. This heating element heats the
FrostControl to approx. 10 °C when the Combi D is switched
on. This means that the boiler can be filled sooner, irrespective
of the temperature in the installation compartment.

Automatic opening of the safety/drain valve

If the temperature at the safety/drain valve is below about
3 °C, it will open automatically and the pushbutton pops
out (position c). The water from the boiler drains through the
drainage socket (d).

Filling the boiler

Check whether the safety/drain valve is closed (see "Closing
the safety/drain valve").
When the temperature at FrostControl is below approx.
7 °C, first switch on the heater to warm the installation
compartment and FrostControl. The safety/drain valve can
be closed after several minutes, when the temperature at
FrostControl is above 7 °C.
– Switch on the power for the pump assembly (main switch
or pump switch).
– Open hot water taps in the kitchen and bathroom (set pre-
selecting mixing taps or single-lever fittings to "hot"). Leave
the valves open until the boiler has been filled by displacing
the air and water is flowing without interruption.
Even if the cold water system alone is operated without
the boiler, the boiler will still fill with water. To avoid frost
damage, the boiler must be drained via the safety/drain valve,
even if it was not operated.
In the event of frost, filling may be prevented by frozen re-
sidual water. The boiler can be thawed by turning it on briefly
(no more than 2 minutes). Frozen lines can be thawed by
heating the interior.
If the boiler is connected to a central water supply (ru-
ral or urban connection), a pressure reducer must be
used, which will prevent pressures higher than 2.8 bar from
occurring.
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