Important Operating Notes; Operating Instructions; Digital Control Panel; Room Temperature Sensor - Truma Combi 2 E Operating Instructions Manual

Important operating notes

If the cowl has been placed near or directly
beneath an opening window, the device must
be equipped with an automatic shut-off device
in order to prevent operation with the window
open.
The integrity and tight fit of the exhaust gas
double duct must be checked regularly, par-
ticularly at the end of long trips. Also check
the mounting of the appliance and the cowl.
Following a blow-back (misfire) always have
the exhaust duct checked by an expert.
Keep the cowl for the exhaust duct and com-
bustion air intake free of contamination (slush,
ice, leaves etc.) at all times.
The warm air outlets and the circulated air in-
take openings must be clear so that the unit
does not overheat.
Do not use any after market air filters or air
grills. The use of such components may cause
the unit to overheat.
The integrated temperature limiter blocks the
gas supply when the unit becomes too hot.
Warning: Air from the discharge vent may be
hot. Do not place combustible materials di-
rectly in front of the discharge vent. Keep cur-
tains, bedding and other flammable materials
away from the vent.

Operating instructions

Always observe the operating instructions and "Impor-
tant operating notes" prior to starting! The vehicle owner
is responsible for the correct operation of the appliance.
The installer or vehicle owner must apply 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 Dometic Service to
send you stickers, if necessary.
Before using for the first time, it is essential to flush
the entire water supply system with clean water. If the
heater is not being used, always drain the water if there is a
risk of frost. No warranty claims for frost damage will be
accepted.

Digital control panel

The digital control panel is described in a separate operating
instruction.

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

Safety/drain valve

The safety/drain valve automatically equalises the pressure in
the event of overpressure in the system. When this occurs,
the water is drained to the outside in intermittent bursts via a
drainage socket.
This safety/drain valve does not protect the water
container from frost damage.
a
Fig. 3
a = Lever in position "Operational – closed"
b = Lever in position "Operational – closed"
c = Lever in position "Drain"
d = Drainage socket (led outside through floor of vehicle)
Opening the safety/drain valve
– Move lever to position (c) – vertical. The water from the hot
water system drains through the drainage socket (d).
The drainage socket (d) of the safety/drain valve must be free
of contamination (slush, ice, leaves, etc.) at all times so the
water can drain easily! No warranty claims for frost dam-
age will be accepted.
Closing the safety/drain valve
– Move lever to position (a) or (b) – horizontal.
2
c
b
d
5