Viessmann VITODENS Operating Instructions Manual page 58

Appendix
Terminology
90
80
70
60
50
40
30
Example:
For outside temperature −14 °C:
A Underfloor heating system, slope
0.2 to 0.8
B Low temperature heating system,
slope 0.8 to 1.6
C Heating system with a boiler water
temperature in excess of 75 °C,
slope 1.6 to 2.0
58
(cont.)
10 0 -10
-14
Outside temperature in °C
Slope
1.4
1.2
1.0
0.8
0.6
0.4
0.2
-20 -30
C
B
A