Viessmann VITOLIGNO 300-C Installation And Service Instructions Manual page 16

Preparing for installation
Siting requirements
Minimum clearances for pellet supply with pellet hopper
a
Fig. 9
Note
Keep area A behind the boiler clear for installation
and maintenance work.
Rated heating output
Wall clearances
a
b
c
d
Note
Dimensions in brackets are measured up to the boiler
casing.
16
(cont.)
kW
mm
mm 450 (1215) 450 (1215)
mm
mm
A
c
60 70
500 500
100 100
800 800
200 sufficient if dimension c
450 required if dimension b
Notes
450
≥
200
≤