Adjusting The Set Room Temperature - Viessmann VITOTRONIC 300 Installation And Service Instructions Manual

Commissioning
Adjusting the heating curve
110
100
90
80
70
60
50
40
30
10
Fig. 35
Example for outside temperature
Underfloor heating system, slope 0.2 to 0.8
A
Low temperature heating system, slope 0.8 to 1.6
B
Heating systems with a boiler water temperature in
C
excess of 75 °C, slope greater than 1.6

Adjusting the set room temperature

Individually adjustable for each heating circuit.
The heating curve is offset along the set room temper-
ature axis. With the heating circuit pump logic function
enabled, the curve modifies the start and stop charac-
teristics of the heating circuit pump.
Standard set room temperature
110
26 °C
A
20 °C
C
-20
B
D
E
Fig. 36 Adjusting the standard set room temperature
from 20 to 26 °C
Boiler water temperature or flow temperature in °C
A
Outside temperature in °C
B
Set room temperature in °C
C
Heating circuit pump off
D
Heating circuit pump on
E
52
(cont.)
Slope
5 0 -5 -10 -15 -20
Outside temperature in °C
14 °C
−
1.8
1.6
C
1.4
1.2
1.0
B
0.8
0.6
0.4
A
0.2
-25 -30
Changing the standard set room temperature
Operating instructions
Reduced set room temperature
110
A
C
B -20
D
Fig. 37 Adjusting the reduced set room temperature
from 3 to 14 °C
Boiler water temperature or flow temperature in °C
A
Outside temperature in °C
B
Set room temperature in °C
C
Heating circuit pump off
D
Heating circuit pump on
E
14 °C
3 °C
E