Securing The Device; Exhaust And Combustion Air Ducting; Permissible Duct Lengths; Installing The Wall Cowl - Truma Combi D4 CP plus ready Einbauanweisung

Securing the device

Check whether the vehicle has a load-bearing floor, double
floor or false floor for securing the heater. If the floor is unsuit-
able, create a load-bearing surface beforehand by gluing a
plywood board to the floor, for example.
Screw heater to vehicle floor, double floor or false floor
using four B 5.5 x 25 screws (included in scope of delivery).
Depending on the situation it may be possible to secure the
heater with three screws; in this case, always screw alu-
minium feet (a) and optionally one of the plastic feet (b) to
the vehicle floor.
a
a
Fig. 6

Exhaust and combustion air ducting

Only Truma duct sets (consisting of an exhaust gas sound
muffler, an extraction duct and an air intake muffler) must be
used for the Combi D heater, since the appliance has been
type tested with these ducts. Do not pinch or kink these ducts
during installation.
The following duct sets are available:
Duct set 60 cm part no. 34501-01 *
Duct set 70 cm part no. 34501-02
Duct set 100 cm part no. 34501-03
Duct set 150 cm part no. 34501-04
* suitable for extremely small installation compartments

Permissible duct lengths

Duct lengths of between 60 cm (min.) and 150 cm (max.) can
be used with the wall cowl.
5
4
Fig. 7
b
b
7 5, 4
8
60 – 150 cm
The length of the exhaust gas sound muffler (4), the
extraction air duct (5) and the air intake muffler (7)
can be measured on a sample for series installation (fixed
lengths). The exhaust gas sound and air intake muffler can be
shortened in isolated cases. In this case the inner duct (4a)
of the exhaust gas sound muffler (4) must be fixed using a
new lock washer (6 – part no. 34020-45200). Truma supplies
the lock washer tool as an installation accessory (part no.
34020-45000).
Fig. 8
A minimum exhaust gas sound muffler (4) bending radius of
8 cm must be taken into consideration when the exhaust duct
is being dimensioned.

Installing the wall cowl

Fit wall cowl to a surface that is as flat as possible so that air
can flow around at all sides.
Wall cowl cut-out
Fix installation template (part no. 34020-42000) to outside
wall of vehicle. Mark wall cowl holes and cut-out.
Before drilling, always check for underlying/concealed
cables, fuel lines, frame sections and the like.
Remove template, drill holes and make cut-out.
If necessary, line vehicle wall around opening with a suitable
material so that the fastening screws can obtain an adequate
amount of grip!
Fit outer part of cowl
Fill groove on outer part of cowl (8) with plastic body sealant
(not silicone), then secure outer part of cowl to wall of vehicle
with 4 screws.
8
Fig. 9
5
4
6
4a
3.5 x 25
15