Flue Installation Options For Balanced Flue Operation - Viessmann VITODENS Technical Manual

Flue systems
(cont.)

1.7 Flue installation options for balanced flue operation

No separate vents are required in the installation room.
1
In the living space (occupied area) with one or more full storeys above
A Flue gas
B Ventilation air
A Flue gas
B Ventilation air
A Flue gas
B Ventilation air
VIESMANN
8
Routing through a shaft (Type C
The boiler draws combustion air from the outside through the annular
gap in the shaft (chimney) and expels the flue gas via the flue pipe to
above the roof. For condensing boilers > 50 kW the installation room
must be ventilated even with balanced flue operation. The shaft is not
part of the standard delivery. For a detailed description, see from
page 12.
Retrofitted shafts
Installation in a retrofitted shaft approved by the building inspectorate
[Germany], consisting of individual shaft elements (e.g. as supplied by
SIMO, Wienerberger or Skoberne) or including mineral profiles (e.g.
from Promatect). For a detailed description of shafts, see page 24.
External wall connection
Only for existing flues with exemption rights
(Type C , to TRGI 2008)
13x
(Permissible up to a rated heating output of 11 kW for central heating
or 28 kW for DHW heating)
According to the LandesFeuVo, issue 1999 [Germany], an external
wall connection is only permissible in individual cases, where routing
the flue gas by other means is not appropriate for technical or eco-
nomical reasons.
The boiler draws combustion air from outside via a concentric coaxial
pipe fitted to the external wall and expels flue gas to the outside via
the external wall. For a detailed description, see page 20.
Horizontal roof outlet
(Type C , to TRGI 2008)
13x
(No limit for rated heating output)
The boiler draws combustion air from outside via a concentric coaxial
pipe at the dormer and expels flue gas to the outside at the dormer.
Routing over external walls
(Type C , to TRGI 2008)
53x
The boiler draws combustion air from the outside via a horizontal, con-
centric coaxial pipe on the external wall and expels flue gas to the
outside via the roof.
In the vertical section the external pipe of the concentric coaxial pipe
acts as thermal insulation, thanks to the static air gap. The combustion
air is supplied via the balanced flue air inlet piece.
For a detailed description, see page 22.
VITODENS AND VITOSOLAR
, to TRGI 2008)
93x