Table of Contents
Advertisement
Design information
(cont.)
6.21 Connection on the flue gas side
Chimney
The system is equipped with a flue gas fan and therefore combustion
equipment without draught requirement. The chimney sizing should be
carried out in the same way for combustion equipment with a pressure-
jet oil or gas burner without draught requirement (flue gas temperature
at rated load 160 - 200 °C). The PYROTEC grate combustion has out-
put control in the range of 25 - 100 % of the rated output. This results
in flue gas temperatures in the range of min. 100 °C to max. 250 °C.
In order to avoid a risk of soot contamination, there should be an insu-
lated chimney. The route from the flue gas fan to the chimney should
be as short as possible. 90° bends should be avoided wherever pos-
sible. Flue pipes more than 1 m long should be thermally insulated.
The chimney should be connected rising at an angle of 30- 45°. The
flue pipe incl. inlet to the chimney must be gas-tight. For the operation
of the PYROTEC grate combustion in accordance with the regulations,
a draught stabiliser (draught limiter) is required in the chimney.
Flue pipe
The induced draught fan may cause vibrations, which can lead to
excessive noise. We therefore recommend connecting the connector
to the chimney with a flexible flue pipe adaptor.
Observe the following when connecting the flue:
6,64 mm 20,54 mm
a
> 1000
E
D
B
C
A Draught limiter
B Recirculation
Trade name
Rated output
Part no:
a
b
c
d
PYROTEC
A chimney compliant with regulations relevant to the rated boiler output
is required for efficient boiler operation.
Provide verification to DIN EN 13384.
Note that in its lower output range, flue gas temperatures below
90 ºC may be generated. Therefore connect the boiler to a moisture-
resistant chimney (thermal resistance class I to DIN 18160 T1).
If the boiler is not being connected to a moisture-resistant chimney,
carry out a chimney calculation or request a chimney assessment
(values for a chimney calculation, see page 9).
C Lambda probe with measured value transducer
D Flue gas temperature sensor
E Flue gas fan
■ Install the flue pipe rising to the chimney (with 45º if possible).
■ Never push the flue pipe too far into the chimney.
■ Ensure the full flue gas path (incl. cleaning aperture) is gas-tight.
■ Do not fit the flue pipe with mortar into the brickwork of the chimney.
Instead, use a flexible flue pipe adaptor. Provide a cleaning aperture.
■ Wall liners to adapt to flue systems by third party manufacturers.
A
■ Provide the flue with thermal insulation of at least 30 mm thickness.
A
kW
390
7423 674
mm
447
mm
350
mm
450
mm
600
PYROTEC grate combustion
530
720
7423 675
7423 676
7423 677
447
461
350
350
450
450
600
660
6
950
1250
7423 678
579
579
400
450
450
450
690
760
81
Advertisement
Table of Contents
