Viessmann Vitovalor 300-P Installation And Service Instructions For Contractors page 89

Adjusting the heating curves
90
80
70
60
50
40
30
10
Fig. 82
Slope setting ranges:
■ Underfloor heating systems: 0.2 to 0.8
■ Low temperature heating systems: 0.8 to 1.6
Selecting the set room temperature
Individually adjustable for each heating circuit.
The heating curve is offset along the axis of the set
room temperature. With the heating circuit pump logic
function enabled, the curve modifies the starting and
stopping characteristics of the heating circuit pump.
Standard set room temperature
90
A
C
-20
B
E
D
Fig. 83 Example 1: Adjustment of 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
D Heating circuit pump "OFF"
Heating circuit pump "ON"
E
Changing the standard set room temperature
Operating instructions
(cont.)
Slope
5 0 -5 -10 -15 -20
Outside temperature in °C
Commissioning, inspection, maintenance
1.4
1.2
1.0
0.8
0.6
0.4
0.2
-25 -30
Reduced set room temperature
90
A
C
B
D
Fig. 84 Example 2: Adjustment of the reduced set
room temperature from 5 °C 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
Changing the reduced set room temperature
Operating instructions
Changing the slope and level
Individually adjustable for each heating circuit.
-20
E
89