Several Vitodens In The Living Space Or In Occupied Areas; In The Living Space (Occupied Area), Immediately Underneath The Roof Or With Only Attics Above (Rated Heating Output ≤ 50 Kw) - Viessmann VITODENS Technical Manual

Flue systems
(cont.)
In the living space (occupied area), immediately underneath the roof or with only attics above (rated heating
output ≤ 50 kW)
A Flue gas
B Ventilation air
C Protective pipe to prevent mechanical damage
In the installation room, with ventilation air supplied through the external wall
A
B
A Flue gas
B Ventilation air
Several Vitodens in the living space or in occupied areas (living space - rated heating output ≤ 50 kW)
A Flue gas
B Ventilation air
VITODENS AND VITOSOLAR
Vertical outlet, if no shaft is available
(Type C , to TRGI 2008)
33x
(Various design options)
1 Direct, vertical roof outlet through a pitched roof
2 Indirect, vertical roof outlet through a pitched roof with protective
pipe in the attic (not converted) or fire protection brickwork (con-
verted attic)
3 Direct, vertical roof outlet through a flat roof
The boiler draws combustion air from the outside and expels flue gas
to the outside through a concentric coaxial pipe via the roof.
For a detailed description, see page 18.
Separate ventilation air and flue gas routing
(Type C , to TRGl 2008)
83x
The boiler draws combustion air from outside via a separate supply
pipe routed through the external wall, and expels flue gas to the outside
via a shaft leading through the roof.
The connection piece to the chimney is designed as a coaxial pipe.
This balanced flue system is used if the existing chimney is unsuitable
for routing combustion air due to its dimensions or characteristics
(deposits).
For a detailed description, see page 21.
Installation on different floors
(Type C , to TRGI 2008)
43x
Operation with negative pressure:
Room sealed balanced flue system required.
Operation with positive pressure:
Balanced flue system for multiple connections.
Several heat sources draw combustion air from the outside through
the annular gap of the room sealed balanced flue system and expel
flue gas to the outside via the roof, through a moisture-resistant inter-
nal pipe.
For a detailed description, see pages 27 and 28.
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