Air Connection; Condensate Discharge - Vaillant ecoTEC exclusive 832 Installation And Maintenance Instructions Manual

5 Installation
BS 5440–1: We recommend that the terminal of a
fan-assisted flue pipe system be positioned as follows:
a) At least 2 m from an opening in the building
directly opposite, and
b) so that the combustion products do not flow out
at right angles to a boundry.
1) Dimensions B, C and D:
These dimensions can be reduced to 25 mm with-
out having a negative effect on the output of the
boiler. In order to prevent the products and con-
densation emission from impinging on any border-
ing surfaces, the terminal should be extended as
shown in Fig. 5.10.
2) Dimension F:
This dimension can be reduced to 25 mm without
having a negative effect on the output of the
boiler. In order to prevent the smoke and conden-
sation emission from impinging on any bordering
surfaces, however, a gap of 300 mm is recom-
mended. For IE, recommendations are given in the
current issue of the IS 813.
Fig. 5.10 Flue pipe terminating under balconies or gutters
5.8

Air connection

Detailed recommendations concerning air connection
are given in BS 5440, Part 2.
A ventilation opening in the room or inner room section
where the boiler is installed is not required.
Ventilating a compartment or enclosure
The boilers have a very high energy efficiency. As a
result of this, only small heat losses are produced at the
casing of the appliance. For this reason, cabinets and
enclosures in which the boiler is fitted do not need to
have permanent ventilation openings at the top and
bottom for cooling.
20
5.9

Condensate discharge

4
a
3
Internal Internal
stackpipe discharge system
Fig. 5.11 Condensate discharge
The ecoTEC exclusive units are equipped with a normal
water condensate collector where the condensate is con-
tinuously diverted into the drain pipe.
> Connect the condensate drain (1) of the boiler to a
condensate drain pipe (2) which has a minimum inter-
nal diameter of 19 mm (22 mm outside diameter for
all external pipes) and which is made from an
acid-resistant material (e.g. plastic overflow pipe).
i
The drain pipe connected to the condensate
drain of the boiler must have a constant gra-
dient (45 mm per metre) and should be
installed and terminate within the building to
prevent the possibility of freezing up.
The condensate drain pipe should terminate in a suitable
location, e.g.:
a) The drain pipe should preferably terminate in the
floor of the house in the ventilation duct (at least
450 mm above the duct base). There must be a
siphon (3) fitted in the line (mounted in the boiler)
producing a connection head of at least 75 mm of
water.
A ventilation valve (4) must be fitted in the drain
pipe in front of the siphon. The connection to the
ducting should not allow overflow into another
drain pipe or allow overflow from another drain
pipe into the condensate drain pipe. This can be
achieved by keeping a gap between the pipe
branches of at least 110 mm, with a duct diameter
of 100 mm, and 250 mm with a duct diameter of
150 mm.
Installation and maintenance instructions ecoTEC exclusive 0020017768_07
b c
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Gulley
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d
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Soakaway