Viessmann VITODENS 200 WB2A, Installation & Servicing Instructions Manual

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3 Installation Requirements
3.3 Flue Terminal Location
Detailed recommendations for flue installation are given in BS 5440:1. The following
notes are for general guidance.
a)
The boiler MUST be installed so that the terminal is exposed to external air.
b)
It is important that the position of the terminal allows free passage of air
across it at all times.
c)
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.
d)
The minimum acceptable dimensions from the terminal to obstructions and
ventilation openings are specified in Figure 3/A.(BS 5440 Part 1)
e)
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.
f)
Where the lowest part of the terminal is fitted less than 2m (78in) 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).
g)
Where the terminal is fitted within 850mm (34in) of a plastic or painted
gutter, or 450mm (18in) of painted eaves, an aluminium shield at least
750mm long must be fitted to the underside of the painted surface.
h)
The air inlet / flue outlet duct MUST NOT be closer that 25mm (1in) to
combustible material.
i)
In certain weather conditions the terminal may emit a plume of steam. This
is normal but positions where this would cause a nuisance should be
avoided.
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