Insulation And Diameter Of Holes In The Roof - Gorenje Ecologic 23 Bedienungs, Wartungs Und Montageanleitungen

When using connections between the pellet boiler and flue pipe, it is mandatory to use joints with
cleaning doors (figure 3). Use of joints with cleaning doors enables regular cleaning without the need
to disassemble pipes. Exhaust fumes in flue connection are under slight pressure. Therefore, it is
compulsory to check that the cover for cleaning ash is completely hermetically closed and that it
remains in this state after each cleaning. Ensure proper reassembly and check condition of the seal.
Figure 3: Cleaning unit
Connection between pipes must be always made with male fitting turned upwards (figure 4).
It is advisable to avoid using horizontal connections of pipes to flue. If this is not possible, the pipes
must not be installed in a downwards angle, but at an upwards angle of at least 5 % (figure 5).
Horizontal installation of pipes must not exceed 2 m in length.
It is not advisable to connect the pipe from the pellet boiler directly to flue with horizontal pipe, longer
than 1 m.
Direction of smoke
gases
NO YES
5 % or
more
Figure 4 Figure 5

5.3 INSULATION AND DIAMETER OF HOLES IN THE ROOF

Once the position of boiler installation is determined, a hole for passage of smoke pipes must be
made. This changes in regard to the type of installation, diameter of smoke pipes and type of wall or
roof, through which it must be guided. Insulation must be of mineral origin (rock wool) with nominal
density greater than 80 kg/m³.
Perfect draught depends mostly on flue pipe, which must be free of obstructions, such as bottlenecks
and/or various joint connections. Joint must be at an angle of 30°, 45° and 90°. Joints at an angle of
90° must be made of three parts (figure 6).
In any case, it is mandatory to provide an initial vertical straight pipe of 1,5 metres in length (minimum)
to ensure correct extraction of smoke gases.
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