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.
– Drill opening (8) with a diameter of 70 mm (duct hole must
be lined with wood in cavities).
– Seal with provided rubber seal (10). Use flexible body seal-
ant on textured surfaces – do not use silicon.
– In the case of thicker walls, first connect the exhaust double
duct to the cowl from the outside.
– Slide rubber seal (10 –
smooth side towards cowl, seal-
ing lips towards wall)
and clamp (4) onto inner part of
cowl (11).
– Before pushing the exhaust double duct through the hole,
slide clamp (7) over duct.
8
10
5
1
11
2
12
13
14
9
4
Ø
70 mm
7
Figure 5
The ducts must be cut to length so that they protrude from
the hole for the cowl after installation. The exhaust duct (1)
must be 10 % longer than the combustion air intake duct (5).
This avoids exhaust duct expansion and tensile load.
– Compress the beginning of the exhaust duct (1) (approx.
2 cm thereof) so that the coils are lying against each other.
– Push the exhaust duct (1) over the O-ring (2a) and onto the
connection (2) as far as the collar (3) (the wall cowl angle
faces upwards).
– Position the clamp (4) so that the flanged rim of the clamp
is gripping the collar.
– Screw the clamp (4) securely into place.
1 4
2
3
2a
Figure 6
– Secure the cowl inner part (11) with 3 screws (12) (pay at-
tention to the installation position – the Truma logo must be
at the bottom).
– Fit outer part of cowl (13) and screw it on with 2 screws (14).
– Slide combustion air intake duct (5) onto serrated connec-
tion (9) and secure with clamp (7).
A new O-ring (2a) must be fitted whenever the exhaust
pipe has been removed.
Water connection
Any pressure or immersion pump up to 2.8 bar can be used to
operate the boiler, as can any mixing battery with or without
an electric switch.
If connected to a
central water supply
(rural or urban con-
nection), or if more powerful pumps are being used, a
pres-
sure reducer
must be used, which will prevent pressures
higher than
2.8 bar
from occurring in the system.
If using immersion pumps, a non-return valve (10 – not in-
cluded in scope of delivery) must be installed between the
pump and the first branch (arrow indicates flow direction).
10
13
12
14
Figure 7
When pressure pumps with a large switching hysteresis are
being used, hot water may flow back via the cold water valve.
We recommend installing a non-return valve (11 – not includ-
ed in scope of delivery) between the outlet to the cold water
tap and the drain valve as a return flow inhibitor.
14
11
13
12
Figure 8
In order to ensure that all the water is drained from the
boiler and that all water connections are leak-tight, the
water connections
(12 + 13)
and
the
drain valve
(14)
must
always be used.
Flexible hose installation
Truma can supply the water connections (12 + 13) and the
drain valve (14) with hose connection, diameter 10 mm, as
accessories.
Pressure-resistant (up to 4.5 bar), hot water-resistant (up to
+80 °C) , food-safe water hoses with an inner diameter of
10 mm must be used.
Water hoses must be as short as possible and free of
kinks. All hose rubber connections must be secured
with hose clamps (including the cold water connection). The
warming of the water and its resulting expansion may gener-
ate pressures of up to 4.5 bar in the drain valve (also occurs
with immersion pumps).
Route all water lines so they slope downwards to the
drain valve. Otherwise there is a risk of frost damage
that is not covered by the warranty!
10
