25
e.g. Gas fireplace type C:
The combustion cycle is compact
compared to the environment in
which it is installed.
The combustion air is fed from
outside.
The units may only be operated
with appropriate flue gas pipe. The
factory components available as
serial accessories
correspond to all requirements.
Condensate
If necessary, the flue gas pipe must
be insulated in order to prevent
the accumulation of condensate.
The temperature of the flue gas
with minimum heat flow rate
corresponds approximately to the
condensation temperature.
With pipe lengths of greater than
5 m (indoors) or 3 m (outdoors),
condensate should be eliminated
by the following means:
■
Through heat insulation of the
flue gas pipes
■
Through the use of condensate
traps, where the collected
condensate is drained from the
flue gas pipe.
Note:
Appropriate condensate traps are
available as accessories.
They can be used with both
horizontal and vertical pipework.
The use of plastic flue gas
pipe is not permitted.
ATTENTION
Guide to selection
If an endpiece is not connected
directly to the unit, whereas a
certain length must be overcome,
it must be ensured - according
to the length and geometry
of the segment - that the end
and extension pieces, as well as
the elbows, exhibit the proper
diameter.
After fastening the segment, the
pressure loss for the individual
parts should be determined
depending on the respective unit
in use.
The pressure loss is different with
each part because the flue gas
flow rate is different.
Add up the determined pressure
losses of the individual parts and
make sure that the total does not
exceed the value available for the
unit type to be used.
If there is a combustion air supply
duct, the pressure losses must be
added to those of the flue gas
pipe.
If the total of the losses should
exceed the available pressure,
pipe with a greater diameter must
be used, whereby the calculation
must be re-computed.
The maximum possible duct
lengths between the unit and
endpiece are shown in the table.
With use of elbows it is necessary
to remove the corresponding
length from the available duct
length for the planned elbow.
Examples:
Elbow Ø 80
90°
corresponding length 1.7 m
Elbow Ø 80
45°
corresponding length 0.8 m
Elbow Ø 100 90°
corresponding length 1.9 m
Elbow Ø 100 45°
corresponding length 0.9 m
Examples for the design of flue
gas ductwork and combustion air
ductwork are represented on the
following pages.
Individually, the units are
classified for the installation
versions:
B23/C13/C33/C43/C53/C63
NOTE
Exceeding the permissible
pressure decreases in the
pipework reduces the heat
output and safe operation of
the equipment.
ATTENTION
Installation work may only
be carried out by authorised
qualified technicians.
