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5.5.13 Concentric horizontal flue gas outlet, vertical part air-surrounded by
shaft
Unit category : C93
A flue tube system according to C93 (C33) is permitted when using the output
material provided by Rotex.
Permitted pipe length and system requirements
Air supply and combustion gas outlet pipe between unit and concentric horizontal
shaft 80/125 with a maximum length of 10 meters. The flue tube must be fitted on a
slope towards the boiler.
Flue outlet in shaft with 80 mm diameter (rigid or flexible) with a maximum length of
25 meters.
When using plastic flue tube material, a minimum temperature class of T120
applies.
The transfer bend between concentric and vertical flue connection in the shaft must
be supported in the manner instructed by Rotex.
The assembly instruction of the manufacturer of the flue tube system must always
be followed in full.
The minimum interior measurement of the shaft must be 200 x 200 mm.
In existing installations, the shaft must be inspected and if necessary cleaned before
the new installation is commissioned.
Combustion gas outlet and air supply pipe
For assembly, see par. 5.5.5 General assembly.
Note:
The outlet system is certified in combination with the unit.
ROTEX Heating Systems GmbH
33
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