Riello DB9 LSE C13 TC FS1 A0 Installation, Use And Maintenance Instructions page 28

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CHAPTER Burner description
FLANGE DIMENSIONS
Air duct connection Fixing to the boiler Gas supply
4 7 0
4 3 0
4 0 0
1 1
420 DB 9
1 8 0 1 8 0
1 6 0
2 2 0 2 2 0
470 DB 12
DN 80
D3972 D3973 D3974
Fig. 3 Fig. 4 Fig. 5
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