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3.4 Flue gas connection
400 mm
B
C
A
A Clean−out cover
B Thermal insulation
C Flexible flue pipe adaptor
Chimney
A chimney corresponding to regulations
and appropriate for the rated boiler
output is a pre−requisite for an efficient
operation.
The chimney opening (clearance
diameter, smallest lateral length) should
be 130 mm, or better still 140 mm. In
borderline cases, provide verification in
accordance with DIN 4705.
Note that in its lower output range, Vitolig
300 can create flue gas temperatures
below 90 ºC. Therefore, connect
Vitolig 300 to a moisture−resistant
chimney (heat throughput factor
resistance class I acc. to DIN 18160 T1).
Flue pipe
The vacuum draught fan may induce
vibrations, which may lead to a noise
nuisance. We therefore recommend you
implement the connection to the chimney
with a flexible flue pipe adaptor.
3 Vitolig 300
If Vitolig 300 should not be connected to
a moisture−resistant chimney, carry out a
chimney calculation or request a chimney
assessment (values for a chimney
calculation see page 9).
Note the following when connecting the
flue pipe:
H Install the flue pipe rising to the
chimney (if possible with 45 º).
H Do not push the flue pipe too far into
the chimney.
H Ensure the full flue gas path (incl.
clean−out cover) is gas−tight.
H Do not insert the flue pipe into the
brickwork of the chimney; instead use a
flexible flue pipe adaptor.
H Provide the flue pipe with thermal
insulation (min. thickness 50 mm).
19
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