Ventilation Requirements - Viessmann Vitodens 100 WB1A Installation And Service Instructions Manual

Preparing for installation
Installation Requirements
&
It is essential to ensure that pro-
ducts of combustion discharging
from the terminal cannot re-enter
the building or any other adjacent
building, through ventilators, win-
dows, doors, other sources of nat-
ural air infiltration or forced
ventilation / air conditioning.
&
The minimum acceptable dimen-
sions from the terminal to obstruc-
tions and ventilation openings are
specified in on page 16(BS 5440
Part 1).
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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.

Ventilation Requirements

Detailed recommendations for air
supply are given in BS 5440:2. The
following notes are for general gui-
dance.
20
(cont.)
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Where the lowest part of the term-
inal is fitted less than 2 m above
ground, above a balcony or above a
flat roof to which people have
access, the terminal must be pro-
tected by a purpose designed
guard. (Available as an optional
extra).
&
Where the terminal is fitted within
850 mm of a plastic or painted gut-
ter, or 450 mm of painted eaves, an
aluminium shield, at least 750 mm
long, must be fitted to the underside
of the painted surface.
&
The air inlet / flue outlet duct must
not be closer than 25 mm to com-
bustible material.
&
Due to the high efficiency of the boi-
ler the terminal may emit a plume of
vapour. This is normal but positions
where this would cause a nuisance
should be avoided.
&
It is not necessary to have a pur-
pose provided air vent in the room
or internal space in which the appli-
ance is installed.
&
If the boiler is to be installed in a
cupboard or compartment, no per-
manent air vents are required for
cooling purposes in the cupboard or
compartment, however, it is essen-
tial to ensure that the minimum
clearances stated in page 9 are
maintained.