Viessmann vitodens Technical Manual page 103

Inside the living area immediately underneath the roof or only in attics above (rated output x 50 kW)
1
2
A Flue gas
B Ventilation air
Inside the living area with fresh air ventilation, through the outside wall (rated output x 50 kW)
A
B
A Flue gas
B Ventilation air
Several Vitodens in the living area or in occupied rooms (living area rated output x 50 kW)
A
B
A Flue gas
B Ventilation air
VITODENS
A
B
C
3
C Pipe to protect against mechanical
damage
4.1 Flue gas systems
Vertical outlet, if no duct is available
(type C , according to TRGI '86/96)
33x
(various options)
1 Direct, vertical roof terminal through a
pitched roof
2 Indirect, vertical roof terminal through
a pitched roof with protective pipe
inside the attic space (not built as a
room) or fire protection brickwork
(attic constructed as a room)
3 Direct, vertical roof terminal through a
flat roof
The heat generator obtains combustion
air from the atmosphere and exhausts
flue gas to atmosphere via a concentric
dual pipe through the roof.
For a detailed description, see page 113.
Separate ventilation and flue gas pipes
(type C , according to TRGI '86/96)
53x
The heat generator obtains combustion
air from the atmosphere via a separate
ventilation pipe, and exhausts flue gas to
atmosphere via a duct leading through
the roof.
The union to the chimney is designed as
coaxial pipe (living area).
This balanced flue system is used if the
existing chimney is unsuitable for routing
combustion air because of its dimensions
or characteristics (deposits).
For a detailed description, see page 115.
Installation on different floors
(type C , according to TRGI '86/96)
43x
LAS chimney required (negative
pressure))
Several boilers draw combustion air from
the atmosphere via the annular gap of the
LAS chimney and route flue gas to
atmosphere through a moisture-resistant
internal pipe via the roof.
For a detailed description, see page 121.
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