Adjusting The Heating Curves - Viessmann Vitoligno 300-P Service Instructions For Contractors

Further details regarding the individual steps
Display
"Output 50 ON"
"Output 157 ext."

Adjusting the heating curves

The heating curves illustrate the relationship between the outside temperature and
the boiler water or flow temperature.
To put it simply: The lower the outside temperature, the higher the boiler water or flow
temperature.
The room temperature, again, depends on the boiler water or the flow temperature.
Settings in the delivered condition:
■ Slope = 1.4
■ Level = 0
90
80
70
60
50
40
30
Commissioning, inspection, maintenance
Explanation
Central fault message
Function extension 0-10V
(see page 101)
10 0
(cont.)
Slope
-10 -20
-14
Outside temperature in °C
1.4
C
1.2
1.0
B
0.8
0.6
0.4
A
0.2
-30
31