Viessmann VITODENS 111-W Installation And Service Instructions Manual page 35

Further details regarding the individual steps
Two boilers per floor
Rated heating output 26 kW
Number of boilers
Correction factor (setting value)
0
1
2
3
4
5
6
Rated heating output 35 kW
Number of boilers
Correction factor (setting value)
0
1
2
3
4
5
6
Note
The correction factor changes the boiler
modulation range.
Commissioning, inspection, maintenance
(cont.)
2
Flue length a (m)
≤ 25
–
– > 8 ≤ 13
– > 13 ≤ 15
–
–
2
Flue length a (m)
≤ 9
> 9 ≤ 15
– > 6 ≤ 8
– > 6 ≤ 11
– > 11 ≤ 14
– > 14 ≤ 15
4 6
≤ 8 ≤ 6
> 6 ≤ 8
> 8 ≤ 10
– > 10 ≤ 12
– > 12 ≤ 14
4 6
≤ 6 ≤ 5
> 5 ≤ 6
> 6 ≤ 7
> 7 ≤ 8
> 8 ≤ 9
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