Viessmann Vitodens 200-W Installation Instructions Manual page 15

Flue terminal position
Position
O From adjacent wall
P From adjacent opening window
Q From another terminal
R Minimum height
Flue Terminal Location
Detailed recommendations for flue
installation are given in BS 5440:1. The
following notes are for general guidance.
• The boiler must be installed so that the
terminal is exposed to external air.
• It is important that the position of the
terminal allows free passage of air across
it at all times.
• It is essential to ensure that products of
combustion discharging from the terminal
cannot re-enter the building or any other
adjacent building, through ventilators,
windows, doors, other sources of natural
air infiltration or forced ventilation / air
conditioning.
• The minimum acceptable dimensions
from the terminal to obstructions and
ventilation openings are specified above
(BS 5440 Part 1).
(cont.)
• If the terminal discharges into a pathway
or passageway check that combustion
products will not cause nuisance and
that the terminal will not obstruct the
passageway.
• Where the lowest part of the terminal is
fitted less than 2m above ground, above
a balcony or above a flat roof to which
people have access, the terminal must
be protected by a purpose designed
guard. (Available as an optional extra).
• Where the terminal is fitted within
850mm of a plastic or painted
gutter, or 450mm of painted eaves, an
aluminium shield at least 750mm long
must be fitted to the underside of the
painted surface.
• The air inlet / flue outlet duct must
not be closer that 25mm to
combustible material.
• Due to the high efficiency of the boiler
the terminal may emit a plume of
vapour. This is normal but positions
where this would cause a nuisance
should be avoided.
Minimum Spacing
300mm
1000mm
600mm
300mm
15