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Installation
Configuration using a separating piece (optional):
i
•
The following must be observed when
laying out the intake pipe:
•
If the intake opening is installed on the
house facade near to a noise-sensitive
area (e.g. bedroom windows, garden
seating area, etc.) we recommend in-
stalling a noise damper in the direct
fresh air suction line.
•
The intake opening must be easily ac-
cessible.
•
No chemicals or poisonous substances
may be stored close to the intake open-
ing
•
The intake opening may not be ins-
talled beside fume extraction outlets or
other venting outlets.
•
Ensure that the intake aperture is free
from any obstructions at all times (lea-
ves, snow, ...)
•
A safety grid must be installed on the
suction opening on the outside wall.
5.3 Flue gas connection and flue
Due to the low flue gas temperatures, condensate
forms within the flue. For this reason, Hoval gas
heating boilers can not be connected to convention-
al house chimneys.
i
The flue gas extraction system must
comply with the following directives:
•
DVGW (TRGI)
•
ÖVGW
•
SVGW/VKF
Pursuant to the abovementioned regula-
tions, a flue gas temperature limiter must
be installed in the boiler.
The flue gas system must meet the follo-
wing requirements:
•
Gastight
•
Watertight
•
Acid-proof
•
Approved for flue gas temperatures of
up to 120ºC (T 120)
•
Approved for overpressure
•
Unhindered back flow of condensate
into the boiler can only be ensured if:
•
The gradient of the horizontal connec-
tion elements is at least 50 mm/m.
•
Only one heat generator may be con-
nected to the same chimney.
•
If two heat generators are to be con-
nected to the same chimney, the rele-
vant regulations must be complied with.
•
Cross sections and maximum lengths
are calculated on the basis of graphs
or tables.
•
The tables can be obtained from the
chimney or flue system manufacturer.
•
The calculation values can be obtained
from the table under point 4.2.
•
The flue gas conduit cross sections
and lengths are calculated following
the technical data for the boiler.
•
The concentric supply air/exhaust sys-
tem of the boiler can also be conducted
horizontally backwards. The Hoval re-
modelling set allows a remodelling on
site
5.4 Condensate drainage
i
The condensate drainage pipes on the
boiler must be made of corrosion resis-
tant material.
The following materials are suitable for
condensate drainage:
PVC, PE, PP, ABS
The local regulations regarding conden-
sate drainage must be observed.