1
Choice of location
Always install the appliance
and its exhaust duct in such a
way that it is always easily ac-
cessible for service work and
can be removed and in-
stalled easily.
For evenly distributed heat-
ing, the installation of the ap-
pliance should be as much in
the centre of the vehicle as
possible (or under the vehi-
cle), and in such a way that
the air distribution ducts can
be routed with approximately
the same length.
The cowl must be placed in
such a way that exhaust gas
cannot find its way into the
vehicle interior. For this rea-
son, choose a location where
there are no opening win-
dows, skylights or ventilation
openings directly above the
cowl or for 30 cm on either
side. If this is not possible, a
warning plate must be placed
on the inside of the window
(or skylight) stating that it
must be kept closed while the
heater is operating. In this
case refrigerator ventilation
ducts must be tight-sealed
from the interior of vehicle.
2
Exhaust duct
Trumatic E 2800 (A) and
E 4000 (A) heaters with wall
or roof cowl must be installed
only with Truma exhaust duct
AA 3 (Art. no. 39320-00) - or
Truma high-quality steel ex-
haust duct AEM 3 (Art. no.
39360-00) for boats - and air
intake duct ZR (Art. no.
39580-00), because the appli-
ances have only been tested
and approved with these ducts.
Attention: New O-rings must
installed each time the appli-
ance has been dismantled.
Permitted duct lengths
1. Inside installation with
wall cowl (see installation
variant 1, page US 2):
- Duct lengths up to max.
30 cm can be laid horizon-
tally or with a downward
slope up to 5 cm.
- Duct lengths of up to
max. 100 cm must be
laid with an upward slope
of at east 5 cm to the wall
cowl.
2. Inside installation with
roof cowl (see installation
variant 2, page US 2):
- Duct lengths up to max.
200 cm must be routed
upwards at an angle of at
least 45 degrees.
3. Under floor installation
with wall cowl (see
installation variant 3, page
US 2):
- Duct lengths of up to
30 cm can be laid horizon-
tally or with a downward
slope of up to 5 cm. Ducts
must also be protected
against damage from flying
stones.
3
Inside installation
with wall cowl set
See installation variant 1
(page US 2)
Installation of wall cowl
Fig. A2: Install the wall cowl
on a surface which is as flat
as possible with a wind flow
from all sides. Drill hole (8)
with diameter 83 mm (any
hollow compartments in the
vicinity of the cowl hole
should be lined with wood).
Seal with rubber seal supplied
(10). Coat textured surfaces
with a plastic coachwork
sealing agent (not silicon).
Slide the clamp (4) onto the
inner cowl section (11). First
compress the exhaust duct
(1) so that the coil windings
are pressed against each oth-
er, then slide over the O-ring
onto the connection fitting
(2). Engage the clamp (4) and
screw tight. Slide the air in-
take duct (5) onto the serrated
connection fitting and secure
with the black screw (12).
Slide the seal (10) over the air
intake duct (5) onto the con-
nection fitting (2). The wide
edge must face up, and the
narrow edge with the drainage
opening must face down.
Insert the assembled cowl in-
to the opening in the vehicle
wall.
Place the finned insert (13) in
the inner cowl section (11).
Secure the cowl grating (14),
cowl section (11) and seal
(10) with 4 screws (15)
(Check correct installation po-
sition - the word „Top” print-
ed on the cowl section must
be uppermost, and the
drainage opening in the seal
must be facing down). The
upwardly projecting part
seals the cap (16) and can be
glued to the vehicle wall. Ap-
plication of the adhesive is
easier with the cap on.
Double cowl duct
connection to the
heating appliance
Fig. A1: First compress the
exhaust duct (1) so that the
coil windings are pressed
against each other. Slide the
clamp (4) over the exhaust
duct (1). Slide the exhaust
duct onto the connection fit-
ting (2) over the O-ring. En-
gage the clamp (4) and screw
tight. Secure the air intake
duct (5) on the connection fit-
ting (6) with clamp (7).
4
Inside installation
with roof cowl set
See installation variant 2
(page US 2).
Install roof cowl on a surface
which is as straight as possi-
ble, with wind flow from all
sides. From the appliance to
the cowl it must be possible
to have a direct duct route ris-
ing over the entire duct
length (max. 2 m)!
Assembling the
condensate trap
A condensate trap has to be
installed between the heater
and the double duct to allow
condensation water and rain
water to drain away.
Attention: The exhaust gas
double duct must not sag -
the condensate trap must be
the lowest point!
Fig. A3: Fully open the clamp
(4) and slide over the O-ring
onto the exhaust gas connec-
tion fitting (2). Slide the ex-
haust coupling (17) over the
O-ring onto the exhaust gas
connection fitting (2) (if the
condensate trap is installed
on a level with the heater, the
drain (18) must be facing
down). Engage the clamp (4)
and screw tight. Tighten the
drain (18).
Assembling the
roof cowl
Fig. A3: Drill a hole with di-
ameter 83 mm (any hollow
compartments in the vicinity
of the cowl hole should be
lined with wood). Seal with
rubber seal supplied (22).
Coat textured surfaces with a
plastic coachwork sealing
agent (not silicon).
If the roof cowl is relatively
thick, first connect the ex-
haust gas double duct from
the outside onto the cowl.
Slide the rubber seal (22) and
clamp (4) onto the inner cowl
section (23). First compress
the exhaust duct (1) so that
the coil windings are pressed
against each other, then slide
over the O-ring onto the con-
nection fitting (24). Engage
the clamp (4) and screw tight.
Slide the air intake duct (5)
onto the serrated connection
fitting and secure with the
black screw (25).
Fasten the cowl section (23)
with 6 bolts (26). Mount cowl
roof (27) and secure using
2 bolts (28).
Attention: The exhaust vents
in the cowl roof must face at
right-angles to the direction
of travel.
Always keep the cap (29) on
when the heater is not
operating.
Double duct
connection to the
heating appliance
Fig. A3: Press end of exhaust
duct (1) together so that
winding touches winding.
Slide clamp (4) over exhaust
duct (1). Pass the exhaust
duct (1) via the O-ring and fit
it to the exhaust coupling (17).
Engage the exhaust duct
tightener (4) onto the exhaust
coupling (17) and secure. Take
the connection fitting (19)
with the wide side over the
exhaust duct and slide it firm-
ly onto the air connection fit-
ting (6) on the heating unit.
Line up the opening in the
connection fitting (19) with
the drain (18). Screw in and
tighten connection fitting (20).
Slide the air intake duct (5)
firmly onto the connection fit-
ting (19) and fasten with duct
clamp (7).
Drill a 10 mm diameter open-
ing in the vehicle floor for the
condensate hose (21). Fasten
the condensate hose onto the
connection fitting (20) and
pass it through the opening.
Attention: Due to the risk of
frost in winter, the hose
should not project more than
2 cm below the vehicle floor!
11
