Vaillant ecoTEC plus Installation Manual page 29

> Chamfer the pipes before they are installed to prevent
damage to the seals. Maintain an angle of 15° and a
clearance of 5 mm.
> Remove all chippings.
> Do not install any dented or otherwise damaged pipes.
i
Note that the pipes must be transported to the
installation site only in the original packaging.
At temperatures below 0 °C, the pipes must be
warmed before beginning installation.
Danger!
a
Risk of poisoning due to escaping flue
gas!
For open-flued operation, the unit must not
be placed in rooms from which the air is
extracted using fans (for example, ventila-
tion systems, extractor hoods, tumble dryer
ventilation). These systems generate nega-
tive pressure in the room. This negative
pressure can cause flue gas to be sucked
into the installation room from the opening
through the annular clearance between the
flue gas pipe and the shaft.
> The unit can only be used in open-flued
operation if simultaneous operation of
the unit and the fan is not possible.
Caution.
b
Unit may malfunction!
In open-flued operation, a sufficient supply
of fresh air must be ensured.
> Keep all air inlet openings free of
obstruction!
Otherwise, it cannot be guaranteed that
the unit will function without fault.
> The combustion air supply (inlet air) for
the condensing boiler must enter
through an opening that leads to exter-
nal air.
> For total nominal heat outputs of up to
50 kW, the cross-section of this opening
must be at least 150 cm
nominal heat outputs exceeding 50 kW,
2
2 cm must be added to the 150 cm
each additional kilowatt. Combustion air
pipes that lead to external fresh air must
have equivalent dimensions with regard
to the flow properties. The required
cross-section must be spread between a
maximum of two openings.
Installation manual for the flue pipe for ecoTEC plus 0020137851_02
Installing the horizontal flue gas pipe Ø 110/160 mm
2
. For all total
2
for
Caution.
b
Risk of damage to the structure of the
building!
In open-flued operation, minor, permitted
leakages of flue gas may cause moisture to
enter the shaft. The shaft must therefore
be ventilated in order to divert the flue gas
leakages outside.
> Install an air inlet opening at the lower
end of the shaft with a diameter of at
least 140 cm
> Enclose the opening using the intake
grille, article number 0020117198 (spare
part).
2
.
10
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