5
Under-floor
assembly with wall
cowl kit
Refer to installation variant
Fig. 5 (Page US 2).
Install wall cowl on as flat a
surface as possible on an out-
side wall (vehicle apron) (refer
to item 3 of interior installa-
tion with wall cowl kit).
Attention: If the wall cowl is
installed using mounting
brackets, or such, under the
floor, the vehicle floor must
be sealed tight (refer to item
6 of interior installation with
floor cowl).
6
Interior installation
with floor cowl
Refer to installation variant
Fig. 2 (Page US 2).
When using the floor cowl al-
ways observe any restric-
tions given in the country-
specific regulations.
The appliance is only to be
assembled in upright position.
In vehicles designed for
residential purposes or in
vehicles with areas fre-
quented by persons on a
short-term basis, the vehi-
cle floor must be sealed
tight and is to have no
openings to the interior,
e.g. vent openings for refrig-
erators, unsealed pedal open-
ings, ventilation valves, hol-
low double floors. The ventila-
tion opening for the gas cylin-
der box is not to be in the
floor, it must be routed to the
side, directly above the floor,
through the outer wall.
The floor cowl is not to lie
within the splash range of the
wheels (apply splash guard, if
necessary) and it must be
free-standing so as to prevent
supports, axles, cross arms
and such from impairing the
correct operation. In addition,
at least three sides beneath
the vehicle floor must be open
in order to ensure unhindered
escape of the exhaust gas.
Assembly of the
floor cowl
Fig. B1: The rectangular
opening for the exhaust gas
outlet (30) must be right-an-
gles to the direction of travel.
Attention: No modifications
must be carried out to the
floor cowl!
Drill an 83 diameter opening
in the vehicle floor. Coat the
space between the cowl and
the vehicle floor with plastic
coachwork sealing agent (31)
- do not use silicone! - Secure
the floor cowl (32) with
4 screws (33).
7
Outside installation
with floor cowl
Refer to installation variant
Fig. 4 (Page US 2).
The appliance is only to be
assembled with cowl connec-
tion fitting pointing vertically
down. The appliance can be
installed on the outside of the
vehicle, on a perpendicular
wall (e.g. on the cab rear wall
or on the body fire wall of a
truck). In articulated vehicles
always pay attention to suffi-
cient spacing between the
cab rear wall and the semi-
trailer (observe rotary and ar-
ticulation movements).
Assembly of the floor
cowl
Fig. C: Slide the cowl (32)
over the O-ring onto the ex-
haust gas connection fitting
(35) on the heating unit. The
side-facing rectangular open-
ings (30) must be at right-an-
gles to the direction of travel.
Apply four flange borings to
the heater casing, drill
through them with a short
drill 2.5 mm in diameter
and fasten the cowl with
4 screws (33)
8
Fastening the
heating appliance
Inside installation with
wall cowl or roof cowl
Fig. D: Depending on the in-
stallation site, bolt the heating
appliance securely with the
fastening straps (a) or angle
pieces (b) supplied.
Inside installation with
floor cowl
Where a floor cowl is used,
place the appliance on the
cowl opening and screw
tight with 4 angle pieces
(see Fig.B2).
Outside installation
Fig. E: Assemble with the aid
of the asembly mount. Fasten
both mounts (36) securely
and firmly to the vehicle with
through bolts not less than
M 5 in size. Fasten the U-
beam (37) to the outside of
the heater with the bolts sup-
plied (38). Fasten the heater
with 4 M 6 x 10 bolts (39) and
self-locking nuts. Fasten two
protective caps (40) to the
outside of the vehicle.
In order to drain condensa-
tion water, drill a hole 8 mm
in diameter at the lowest point
in the heater casing some
20 mm from the edge. Ensure
that the drill does not pene-
trate more than 10 mm in or-
der to prevent damage to any
internal components. Fit the
rubber connection fitting sup-
plied (it projects about 4 cm
downward). (Fig. C + E:d)
9
Warm air distribution
and circulating air
return with interior
installation
Warm air distribution
Fig. F: The hot air (W) is ex-
pelled from 2 vents, either di-
rectly or via a hot air duct VR
(diameter 72 mm).
From the appliance to the
first air outlet install only VR
duct (72 mm diameter) with a
maximum length of approx.
1.5 m. To prevent overheat-
ing, the first air outlet must
be non-sealable (swivelling
vent SCW 2, end support
ENE). ÜR duct (65 mm diam-
eter) can also be laid after the
first air outlet. Hot air ducts
whose surface temperature
exceeds 80 degrees C (espe-
cially as far as the first air out-
let in the case of the E 4000)
must be protected from con-
tact by cladding with a duct
insulator (such as Truma l 80).
Secure all duct connections
with self-tapping screws. Fas-
ten ducts with clamps.
The warm air system is de-
signed for each type of vehi-
cle individually, on a modular
basis. There is an extensive
accessories program available
(refer to brochure). You can
obtain sketch diagrams free of
charge from the Truma Service
Centre, showing optimal in-
stallation suggestions for warm
air systems in all current-type
caravans and mobile homes.
Circulating air return
Fig. F: The circulating air (U)
is sucked directly back into
the appliance.
If the heating appliance is in-
stalled in a stowage compart-
ment or similar, make an ap-
propriately sized opening (ap-
prox, 200 mm
2
) for circulating
air feedback.
Attention: Do not block air
ducts to heating appliance.
10
Warm air supply
and circulating air
return with outside
assembly
Refer to installation vari-
ants 4 + 5 (Page US 2).
The warm air duct and recir-
culating air duct between the
heater and the vehicle - espe-
cially in the area prone to
stone demage - must be
made from flexible LF air
ducting or, in the protection
zone, from LI air ducting
(106 mm in diameter)
A protective casing over the
entire heater system protects
it against damage and wea-
ther conditions and simulta-
neously serves as insulation.
Fig. G1: Drill two openings
with a diameter of 100 mm.
Apply sealing agent to flange
of both connector fittings (41)
and bolt to the openings on
the outside. Place the grid
(47) in the recirculating air
duct between the suction
connection fitting and the ve-
hicle wall. Thread LFS wire
clamps (42) onto the air ducts
(43). Slide the air ducts over
the heater connection fittings
(44) and the connector fit-
tings (41) and fasten them
with the LFS wire clamps
(42). Seal the joints with sili-
con paste.
Fig. G2: Seal hollow double
walls around the air duct by
putting two rolled sheet metal
strips (45) or lengths of pipe
between 97 an 100 mm in di-
ameter into the openings.
Fig. G3: The warm air can be
extended inside the vehicle
using LI air duct (diameter
106 mm). To connect the air
duct, fasten another conec-
tion fitting (81) into the open-
ing. The two connector fit-
tings can be bolted together
through the wall.
Fig.G1: If you wish the warm
air to be diffused inside the
vehicle, an air diffuser (82)
can be fitted over the warm
air duct with 4 bolts.
Attention: Do not close off
or restrict the opening for the
recirculating air duct!
The air diffuser (46) has 2 con-
nections for VR duct (72 mm
diameter), neither of which
must be closed off. The pro-
tective metal sheet supplied
(48) acts as a heat shield and
must be securely fastened
over the air diffuser (46).
Stowage protection can be
provided in the form of anoth-
12
