Plastic (Pps) Balanced Flue System For Routing Through A Shaft With Balanced Flue Oper- Ation; Internal Shaft Dimensions - Viessmann Vitoladens 300-C Technical Manual

Design and sizing information for the Vitoladens 300-W and 333-F
3.1 Plastic (PPs) balanced flue system for routing through a shaft with balanced flue
operation (type C
63x
For balanced flue operation, a coaxial flue (internal pipe for flue gas,
external pipe for combustion air) is required as a connection piece
between the boiler and the shaft.
Internal flue diameter: Ø 60 or 80 mm
Internal diameter, ventilation air pipe: Ø 100 or 125 mm
The connection piece is fitted to the boiler flue connection and must
provide an inspection port.
For installation through shafts or channels with longitudinal ventilation
meeting the requirements for domestic chimney stacks 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 (max. 2 storeys).
Prior to installation, the 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 (in par-
ticular sulphur and soot deposits) must not remain on the inside of the
chimney. If this is not possible, the ventilation air can be routed sepa-
rately (see page 31).
Close off and seal any other connection apertures with appropriate
materials.
This does not apply to any cleaning or test apertures that are provided
with chimney cleaning covers and to which an appropriate test mark
has been affixed.
Check prior to installation whether the shaft runs straight from top to
bottom or if it is corbelled (check with mirrors).

Internal shaft dimensions

a
b
Minimum shaft dimensions to DIN V 18160
Note
According to the approval certificate, reduced clearances may also be
selected, if this is indicated by the performance verification to EN
13384 (not applicable to flexible flue pipes).
System size A
60
60 (flexible)
80
80 (flexible)
VITOLADENS, VITORONDENS
to TRÖI 2009)
a
c
External diameter;
female connection a
Ø mm
73
64
94
100
If it is corbelled, we recommend the installation of a flexible flue pipe
(see page 28).
In the installation room, at least one inspection port must be provided
in the flue system for inspection and cleaning as well as for testing the
pressure (if required). If the flue pipe is inaccessible from the roof, a
second inspection port must be provided in the attic behind the chim-
ney cleaning hatch.
Provide an inspection port at the base of the shaft for checking the
secondary ventilation. Safeguard the draining of the condensate from
the flue pipe to the boiler with a fall of at least 3º.
The flue system must be routed to above the roof (protrusion above
the roof according to local regulations).
Alternative plastic flue pipes with Building Regulation approval may be
used, for example, if a larger pipe diameter is required because of
greater flue length. 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 Vitoladens as one technical unit) are used, the flue
system must be checked for tightness by the flue gas inspector prior
to commissioning.
This may be carried out, in accordance with the flue system approval
certificate, by measuring the CO
If this test results in a CO content of more than 0.2 % or an O
2
below 20.6 %, check the flue system.
Minimum internal shaft dimension
b
square or rectangular
(short side)
mm
113
104
135
140
or O value inside the annular gap.
2 2
content
2
c
round
Ø mm
133
124
155
160
VIESMANN
3
25