HDG Compact 25, Руководство по эксплуатации

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4 Planning and installation – Connections
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Free-standing chimneys require particularly good insulation.
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HIMNEY DIMENSIONS
The system may only be connected to a chimney which has been di-
mensioned in accordance with DIN EN 13384-1, taking into account
the fuel planned and the expected load, and which meets local
building regulations for the installation site.
A chimney can only be designed with full knowledge of the on-site
conditions. This includes taking into account the following factors:
• Building location
– Surrounding hills/slopes
– Wind direction
• Location of the chimney in the roof
– The opening of the chimney must be at least 0.5m above the
highest edge of roofs with a slope of more than 20° or at least
1.0 m higher than roof surfaces which slope at 20° or less.
• The effective height of a chimney is measured from the flue en-
trance into it to the end of the chimney.
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ONNECTING THE BOILER TO
THE CHIMNEY
The firing system must be connected with a connecting piece which
is as short as possible, at an angle which is less than 30 - 45° to the
chimney.
You should aim for a connecting piece with a maximum length of 1
m using just one fitting. Every additional fitting results in a greater
pressure loss in the exhaust path and should thus be avoided. The
same is true for overly long connecting pieces. If, for constructional
reasons, these must be longer than 1 m, they should be adequately
insulated (at least 5 cm of mineral wool or equivalent material) and, if
possible, fitted with an upward inclination.
To compensate for irregularities in the flue draught of the chimney,
HDG Bavaria recommends installing an auxiliary air unit in the flue
gas pipe, or even better, in the chimney itself as shown in Figure 4/4
- Connection to the chimney.
1 Auxiliary air unit
2 Cleaning door
A) Chimney approx. 30° - 45°
B) Clearance at least 50 cm
Figure 4/4 - Connection to the chimney
2
A
B
1