Viessmann Vitodens 100 Series Installation And Service Instructions Manual page 107

Specification
(cont.)
UPS 15-60 (rated heating output 26 kW)
600 60
500 50
400
40
300 30
200 20
100 10
0
0
0
Flow rate in m³/h
A Stage 1
B Stage 2
C Stage 3
C
B
A
0.5 1 1.5
Specification
2 2.5 3 3.5
107