Connecting The Exhaust Double Duct To The Device; Circulated Air Intake; Warm Air Distribution - Truma Combi Einbauanweisung

Connecting the exhaust double duct to the
device
Compress exhaust duct (1) at its beginning so that the coils
lie next to each other. Slide clamp (4 – claws toward unit)
over exhaust duct (1). Slide clamp (7) onto combustion air
intake duct (5). Slide exhaust duct (1) all the way onto con-
nection (3). Slide clamp (4) as far as it will go (end position
must be between claws of clamp) and screw in place. Slide
combustion air intake duct (5) onto connection (6) and se-
cure with clamp (7).
6
3
3 – 4 Nm
Figure 9

Circulated air intake

The circulated air is drawn in by the unit. This must have one
large or several small openings with a total area of at least
150 cm² between the living compartment (not the rear storage
space) and the installation compartment.
If a grid (not included) is installed (figure 10), the same require-
ments must be complied with for drawing in air in terms of the
cross sectional area through which flow occurs (150 cm²).
Figure 10
The circulated air inlets must be arranged such that exhaust
from the vehicle engine or the heater cannot be drawn in
under normal operating conditions. Structural measures must
be taken in order to ensure that the heating air that is led into
the interior of the vehicle cannot be contaminated.
4
1
7
5

Warm air distribution

Most of the warm air is led into the floor area of the living
compartment via flexible ducts.
The 4 connections on the unit are designed for the 65 mm
diameter ÜR duct (part no. 40230-00). Use only pressure-
safe ducts in compliance with Truma quality requirements.
Other ducts that do not meet our quality standard (particularly
crown pressure resistance, duct diameter and number of
grooves) must not be used.
If the warm air duct has to be subjected to a considerable
amount of bending immediately behind the warm air outlet
of the unit in confined spaces, we recommend the use of
the BGC 90° elbow (part no. 34091-01). This elbow makes
it possible to connect a ÜR warm air duct with a diameter
of 65 mm or a VR warm air duct with a diameter of 72 mm.
Figure 11
With a duct length of less than 2 m the air outlet must not be
installed higher than the warm air duct connection. With a
duct length of less than 50 cm, the duct must create a siphon
between the connection and the outlet.
L ≤ 50 cm
Figure 12
These measures prevent undesirable heating of the vehicle
due to convection (cowl effect) during operation in summer.
The ducts for warm air distribution must be firmly in-
serted into the connections. A clip is attached to each
connection to provide a more secure grip.
For optimum warm air distribution, Truma always recommends
using the 4 warm air outlets of the heater. If only three warm
air outlets are needed, one of the lower warm air outlets must
be sealed with a blank cover VD-Combi (part no. 34310-01).
The blank cover must be firmly pushed into the moulded part
of the heater until it audibly engages and is firmly seated.
Check for firm seating.
If four warm air outlets are being used, a closable end
outlet EN may be installed in one warm air branch. If
only three warm air outlets are being used, it must be ensured
that if a closable end outlet is being used (in a bathroom, for
example), a second non-closable nozzle is installed in the
warm air branch.
In order to prevent heat accumulation when using the
Combi D 6(E), all 4 warm air connections must be at-
tached. The cross-section of the warm air ducts must not be
reduced by duct connections or the like. If a closable EN end
outlet is installed in a warm air branch of the Combi D 6(E)
(e.g. in the bathroom), a second non-closable nozzle should
be installed in this warm air branch.
The warm air system is designed individually for each vehicle
type using the modular design principle. A wide range of ac-
cessories is available for this purpose.
L ≤ 50 cm
15