Operating Instructions; Room Thermostat; Frostcontrol; Opening The Safety/Drain Valve - Truma Combi D6 Mode D'emploi

Operating instructions

Always observe the operating instructions and "Impor-
tant operating notes" prior to starting! The digital / ana-
logue control panels are described in separate operating
instructions. The vehicle owner is responsible for correct
operation of the appliance.
The installer or vehicle owner must affix the yellow sticker
with the warning information, which is enclosed with the ap-
pliance, to a place in the vehicle where it is clearly visible to
all users (e.g. on the wardrobe door)! Ask Truma to send you
stickers, if necessary.
Before using for the first time, it is essential to flush the
entire water supply system through with clean water. If
the heater is not being used, always drain the water contents
if there is a risk of frost! There shall be no claims under
guarantee for damage caused by frost!
Materials in the device which come into contact with
water are suitable for use with drinking water (see
manufacturer declaration:www.truma.com – Manufacturer
Declaration).

Room thermostat

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.
2
Fig. 2
The thermostat setting at the control panel depends on the
personal heating requirement and the design of the vehicle,
and must be individually determined.

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
Fig. 3
a = rotary switch position "On"
b = push button position "Closed"
c = push button position "Drain"
d = drainage socket
(led outside through floor of vehicle)
a
d

Opening the safety/drain valve

Turn the rotary switch by 180° until it engages, whereby the
push button pops out (position c). The water from the boiler
will be released 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! There shall be no claims under guarantee
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 push button. The
push button 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 push button
(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 drain valve is below about 3 °C, it
will open automatically and the push button pops out (posi-
tion 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 ap-
prox. 7 °C, first switch on the heater to warm the instal-
lation 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 kitchen and bathroom, (set prese-
lecting 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 being operated without
the boiler, the boiler still fills 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 residual
water that has frozen. The boiler can be thawed out again
by briefly starting it up (max. 2 minutes). Frozen lines can be
thawed out by heating up the interior.
If connected to a central water supply (rural or urban
connection), a pressure reducer must be used, which
will prevent pressures of greater than 2.8 bar from occurring
in the boiler.
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