The ratio of the radius of curvature (r) to pipe diameter (d) should be greater than 1
r:d ≥ 1
For example:
- Diameter of supply air connection = 60 mm
- Minimum radius of pipe bends = 60 mm
Install the supply air line in as straight a line as possible and over the shortest path.
Keep the number of pipe bends to a minimum (ideally a maximum of 4 bends)!
In addition, the following applies: The maximum resistance of the supply air line is 20
Pa!
You can find the necessary dimensions of the supply air connections in the boiler in
the technical data sheets.
2.4.9 Air supply in the installation room
The system is operated in open flue mode, i.e. the combustion air required to operate
the pellet boiler is drawn from the installation room.
Requirements for the supply of combustion air to the installation room:
▪ Observe the following at the combustion air opening leading outside:
– Weather conditions must not affect the air flow in any way (e.g. snow and
foliage)
– The free cross-sectional area must be maintained taking into account e.g.
covering grid plates, slats, etc.
▪ If air lines exceed 2 m or if the combustion air is discharged mechanically, the flow
rate must be calculated (maximum flow rate = 1 m/s)
NOTICE! Observe the standards cited in these instructions as well as other national
and local regulations!
⇨ See "Note on standards" [page 6]
2.4.10 Note on installing an external combustion air supply
NOTICE! Install the combustion air supply (piping) in accordance with the applicable
standards
⇨ See "Notes on standards" [page 6]
❒ Connect supply air duct to the connection provided (external combustion air) on
the pellet boiler and make sure that it is properly sealed.
Safety
2
Design Information
Installation Instructions PE1 Pellet 7-35 | M1441017_en
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