Plastic (Pps) Balanced Flue System For Routing Through A Shaft - Balanced Flue Oper- Ation; Internal Shaft Dimensions To Din V 18160; To Trgi 2008) - Viessmann VITODENS Technical Manual

Design and sizing information for connection on the flue gas side
All details regarding length and cross-section in the following tables
are only valid in connection with the balanced flue components offered
in the Viessmann pricelist.
2
2.2 Plastic (PPs) balanced flue system for routing through a shaft – balanced flue opera-
tion (type C

to TRGI 2008)

93x
For balanced flue operation, a coaxial flue pipe (internal pipe for flue
gas, external pipe for combustion air) is required as a connection piece
between the Vitodens and the shaft.
The connection piece is fitted to the boiler flue connection and must
contain an inspection port.
Note
Gas condensing boilers with a total rated heating output greater than
50 kW may only be installed in rooms that provide ventilation air aper-
tures to the outside, see page 31.
For installation through shafts or ducts with longitudinal ventilation
which meet the requirements for chimneys to DIN V 18160-1 or have
a fire rating of 90 minutes (L90), or a fire rating of 30 minutes (L30) for
buildings in categories 1 and 2 (max. 2 storeys).
Prior to installation, the relevant flue gas inspector should check that
the shaft to be used is suitable and approved for this purpose.
Shafts that were previously connected to oil or solid fuel boilers must
be thoroughly cleaned by a chimney sweep. Loose deposits of sulphur
and soot must not remain on the inside of the chimney. Running a
balanced flue pipe through the shaft is then not required.
If thorough cleaning is impossible, if chloride deposits are present or
if the shaft is silted up, a separate balanced flue can be used inside
the shaft.
Close off and seal any other connection apertures with appropriate
materials.
This does not apply to any cleaning or inspection apertures that are
provided with chimney cleaning covers and that are identified with an
appropriate test mark.

Internal shaft dimensions to DIN V 18160

a
b
Minimum internal shaft dimensions
System size A
60
60 (flexible, shaft cover PPs)
60 (flexible, shaft cover metal)
VIESMANN
12
Vitodens 200-W to 35 kW,
Vitodens 222-F, Vitodens 222-W,
Vitodens 242-F, Vitodens 300-W
and 333-F, Vitodens 343-F and
Vitosolar 200-F
Vitodens 200-W, 45 to 60 kW
Vitodens 200-W, 80 to 150 kW
Check prior to installation whether the shaft runs straight from top to
bottom or if it is offset (check with mirrors).
If the chimney is offset, we recommend installing a flexible flue pipe
(see page 17).
Inside the installation room, at least one inspection port must be pro-
vided in the flue system for checking and cleaning as well as for check-
ing the pressure (if required). If the flue pipe is not accessible from the
roof, a second inspection port must be provided in the attic, behind the
chimney cleaning hatch. For further information, see FeuVo [Ger-
many].
Provide an inspection port at the base of the shaft for checking the
secondary ventilation. Safeguard the draining of the condensate from
the flue into the boiler by maintaining an appropriate fall of at least
3°.
The flue system must be routed to above the roof (protrusion above
the roof according to local regulations).
Alternative CE-designated flue pipes may be used, for example if a
larger flue pipe diameter is required, i.e. for greater flue lengths. The
performance verification to EN 13384 should then be provided by the
respective flue manufacturer.
If flue pipes other than those offered as accessories (which are
approved with the Vitodens as a single structural unit) are used, the
flue system must be checked for tightness by the flue gas inspector
prior to commissioning.
In accordance with the flue system approval certificate, this may be
carried out by measuring the CO
If this test results in a CO
than 20.6 %, check the flue system for tightness.
Note
According to the approval certificate, internal shaft dimensions smaller
than those shown in the tables may also be used for balanced flue
operation, if this is indicated by the performance verification to
EN 13384.
a
c
External diameter, fem.
connection
a
Ø mm
73
72
87
Internal diameter Ø in mm
Flue pipe
or O value inside the annular gap.
2 2
content above 0.2 % or an O
2
Minimum internal shaft dimension
b c
Square or rectangular Round
(short side)
mm Ø mm
113 133
112 132
140 147
VITODENS AND VITOSOLAR
Ventilation air
pipe
60 100
80 125
100 150
content lower
2