Plastic (Pps) Flue Pipe For Routing Through A Shaft - Open Flue Operation (Type B, To Trgi 2008); Internal Shaft Dimensions - Viessmann VITODENS Technical Manual

Design and sizing information for connection on the flue gas side
2.10 Plastic (PPs) flue pipe for routing through a shaft – open flue operation (type B, to
TRGI 2008)
Open flue operation requires a flue pipe as the connection piece
between the Vitodens and the shaft, as well as for the routing through
the shaft.
The installation room must provide a ventilation air aperture with
an open cross-section of at least 150 cm
to TRGI 2008).
Note
Install the Vitodens 200-W, from 60 kW, and multi boiler systems in
accordance with FeuVo [or local regulations] in a separate installation
room with a suitable ventilation aperture. The cross-section should be
2
at least 150 cm and should be 2 cm
50 kW total rated heating output. This cross-section may not be split
over more than 2 apertures (observe FeuVo and TRGI 2008, or check
local fire regulations).
The flue system is connected to the boiler flue connection.
The combustion air is drawn from the installation room via the annular
gap in the boiler flue connection.
For installation through shafts or ducts with longitudinal ventilation
meeting the requirements for domestic chimneys to DIN V 18160-1, or
with a fire rating of 90 minutes (L90), or a fire rating of 30 minutes (L30)
for buildings in categories 1 and 2.
a For installation in Austria, observe the relevant safety regu-
lations of the ÖVGW-TR Gas (G1) 1985, ÖVGW-TRF (G2),
ÖNORM, ÖVGW, ÖVE and regional regulations.
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.

Internal shaft dimensions

a
b
Minimum internal shaft dimensions
System size A
60
60 (flexible, shaft cover PPs)
60 (flexible, shaft cover metal)
80
80 (flexible, shaft cover PPs)
80 (flexible, shaft cover metal)
100
100 (flexible, shaft cover PPs)
100 (flexible, shaft cover metal)
125
150
VITODENS AND VITOSOLAR
2 or 2 × 75 cm 2 (according
2
larger for each kW above
a
c
External diameter, fem.
connection
a
Ø mm
73
72
87
94
102
116
128
127
142
145
184
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.
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 34).
The relevant flue gas inspector should check the system for tightness
prior to commissioning (where applicable).
In the case of open flue operation, this can only be carried out by
means of a pressure test.
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 the flue pipe is not accessible from the roof, a second inspection port
must be provided in the attic, behind the chimney cleaning hatch.
Safeguard the draining of the condensate from the flue into the boiler
by maintaining an appropriate fall of at least 3°.
Route the flue system to above the roof (observe the roof protrusion
parallel to the roof slope 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. In
such cases the performance verification to EN 13384 should be pro-
vided by the relevant flue pipe manufacturer.
Minimum internal shaft dimension
b
Square or rectangular
(short side)
mm
113
112
140
135
142
165
170
167
182
185
224
(cont.)
c
Round
Ø mm
133
132
147
155
162
176
190
187
202
205
244
VIESMANN
2
31