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9-8

FITTED EQUIPMENT

WARM AIR & HOT WATER
HEATING

A Truma liquid gas Combi 4E warm-air
heater, with integrated hot water boiler, is
fitted and operates on LPG and/or 230V
electricity depending on the chosen mode of
operation.

NOTE: The heater is able to operate while
the vehicle is in motion. For safety
reasons when re-fueling, the heater will
turn off automatically when the engine is
turned off. After the engine is re-started
the heater will need to be re-started at the
control panel.

In winter operation the heater can be used to
heat the room and simultaneously warm
water. If only warm water is required, select
summer operation.

At a temperature of approximately 3 deg C
the automatic frost control safety/drain valve
will open and drain the boiler.

Three different options are available for
operating the unit.

Gas operation only: Propane/butane for
autonomous use.

Electrical operation only: 230V for stationary
use on camp sites.

Mixed operation: Gas and electrical operation
- only possible in winter mode.

Winter operation

In winter operation, the unit automatically
selects the required power setting according
to the temperature difference between the
temperature set on the control panel and the
current room temperature. When the boiler is
filled, the water is automatically heated as
well. The water temperature depends on the
selected operation mode and the heater
output.

All three energy selection options can be
used for winter deployment.

With gas operation the unit automatically
selects the output level that is required.

Depending on the fuse protection at the
camping site, power of 900W (3.9A) or
1800W (7.8A) can be manually selected for
electrical operation.

If more output is required (e.g. heating up or
low outside temperatures) gas or mixed
operation should be selected so that enough
heating power is always available.

With mixed operation, 230V electrical
operation is preferred if the power
requirement is low (e.g. for maintaining the
room temperature). The gas burner is not
enabled until the power requirement is
higher, and is the first to switch off during
heat-up operations.

Summer operation (boiler operation only)

Gas operation or 230V electrical operation is
used for hot water preparation. The water
temperature can be set to 40 degºC or 60ºC.

With gas operation the water is heated at the
lowest burner setting. Once the water
temperature is reached, the burner switches
off.

Depending on the fuse protection at the
camping site, power of 900W (3.9A) or
1800w (7.8A) can be manually selected for
electrical operation.

Note:

Mixed operation is not possible. With

this setting the unit automatically selects
electrical operation. The gas burner is not
enabled.

Before operation

Note:

Heating is possible without restrictions

with gas, electrical and mixed operation, with
or without water.

Check to make sure the cowl is unobstructed.
Be sure to remove any covers that may be
present.

Turn on the gas cylinder and open quick-
acting valve in the gas supply line.

Check whether the power supply fuse
protection on the camp site is adequate for
the 900W (3.9A) or 1800W (7.8A) 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.