Viessmann vitodens Technical Manual page 112

4.2 Design and sizing information for flue pipe connections
Plastic (PPs) balanced flue system for vertical terminals on sloping and flat roofs
(type C , according to TRGI '86/96)
33x
For vertical roof terminals when Vitodens
is installed in attics
The roof terminal may only be used
where the ceiling of the occupied room
also forms the roof or only the roof
structure is located above the ceiling
(pitched attic).
Note
Condensing boiler with an output of
> 50 kW must be installed in a separate
and ventilated installation location
(according to FeuVo [Germany])
(Vitodens 300 with 66 kW).
When the balanced flue system is routed
through a roof space which is not used as
accommodation, run the balanced flue
pipe through an additional metal pipe as
protection against mechanical damage
(TRGI '86/96, point 5.6.1.2).
It may also be routed behind a jamb wall
or a solid wall of an attic built as
accommodation, if the fire protection
class of the jamb wall corresponds to that
of the ceiling (e.g. B 30).
Minimum distances to combustible
materials inside the installation location
or in connection with the roof terminal do
not have to be observed.
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It was verified as part of the CE approval
test that nowhere on Vitodens or the
balanced flue system surface will
temperatures higher than 85 ºC occur.
H Vitodens 12 kW:
Int. dia. flue pipe ∅ 60 mm
Int. dia. ventilation pipe ∅ 100 mm
H Vitodens 26 to 35 kW:
Int. dia. flue pipe ∅ 80 mm
Int. dia. ventilation pipe ∅ 125 mm
H Vitodens 300 from 49 kW:
Int. dia. flue pipe ∅ 100 mm
Int. dia. ventilation pipe ∅ 150 mm
Max. number of bends
H 87º 2 pieces
or
H 45º 3 pieces
For a different number of bends, deduct
from/add to the given max. extended length
1 m for 87º bends or 0.5 m for 45º bends.
Inside the installation room, install an
inspection aperture for checking and
cleaning the flue pipe.
The vertical roof terminal has been tested
and CE-designated as a concentric
balanced flue system and as one
technical unit with the Vitodens
condensing boiler.
A function verification according
to EN 13384 is not required.
Vertical flat roof terminal
Integrate the flat roof collar into the roof
skin according to the flat roof guidelines
(see page 141). Insert the roof terminal
from above and push onto the flat roof
collar.
Note
The ceiling aperture should have a
diameter of at least the stated size:
System size ∅ 60 mm:
System size ∅ 80 mm:
System size ∅ 100 mm:
Secure the roof terminal with a clamp to
the roof after the installation has been
completed.
Maintain minimum clearances of 1.5 m
towards each other and other
components in accordance with FeuVo
[Germany] when installing several
vertical roof terminals adjacent to
each other.
VITODENS
105 mm
130 mm
160 mm