Fuel Supply; Fuel Quality; Fuel At Low Temperatures; Operating Instructions - Truma Combi D4 CP plus ready Gebrauchsanweisung

Fuel supply

Fuel quality

The heater requires DIN EN 590 diesel fuel for operation.
Operation using bio-diesel (PME, RME or AME) is not
permitted.

Fuel at low temperatures

The refineries and filling stations will automatically perform
the required adjustments for the usual winter temperatures
(winter diesel).
Difficulties can occur at temperatures below 0 °C if the vehicle
still has summer diesel in its fuel tank.
If no special diesel fuel is available for use in low tempera-
tures, e.g. winter diesel, then petroleum or benzine should
be mixed in with the fuel, in accordance with the instructions
given by the vehicle manufacturer.
Temperature
0 °C to -20 °C Winter diesel
-20 °C to -30 °C Polar or Arctic diesel
Used oil should not be used as an additive!
To guarantee that all fuel lines of the heater unit are filled with
winter diesel or another permitted mixture after fuelling, the
heater must be operated for at least 15 minutes.

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
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