Viessmann VITOTRONIC 300 - Heating Circuit Pump

65
0.2
Outside temperature in °C
Boiler water or flow temperature in °C
Slope
2.4 2.6
2.8
3.0
3.2
3.4
90
80
70
60
50
40
30
0 -10 -2010
A
B
2.0 2.2
Set room temperature in °C
35
30
25
20
15
10
5
0.4
0.6
0.8
1.0
1.2
1.4
-30
1.8 1.6
C
-14
Fig. 5
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
Factory-set slope = 1.4 and level = 0.
A
B
Boiler water or flow temperature in °C
110
+20 -20
Outside temperature in °C
3.5
1.4
0.2
Fig. 6
A
Changing the slope:
The steepness of the heating curve changes.
B
Changing the level:
The heating curves are shifted in parallel in a verti-
cal direction.
Heating circuit
A heating circuit is a sealed unvented circuit that con-
nects the boiler and radiators and in which the heating
water circulates.
A heating system may comprise several heating cir-
cuits. For example, one heating circuit for the rooms
occupied by you and one heating circuit for the rooms
of a separate apartment.
Heating circuit pump
Circulation pump for circulating the heating water in
the heating circuit
Cascade
A cascade is a system with multiple heat generators.
Appendix
Terminology (cont.)
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