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Siemens Heating controllers RVP201 and RVP211 CE1P2464en
Building Technologies 3 Technical design 12.12.2007
20 10
0
-10 -20 -30
90
80
70
60
50
40
30
4
3,5 3 2,75 2,5 2,25
2
1,75
1,5
1,25
1
0,75
0,5
0,25
100
2462D04
T
V
T
AM
110
20
S
=
Heating curve chart
S Slope
T
AM
Composite outside temperature
T
V
Flow temperature
The heating curve has a fixed tilting point at an outside temperature of 22 °C and a flow
temperature of 20 °C. The heating curve slope can be infinitely set around this point in
the range 0.25…4.
The substitute line of each heating curve runs through the tilting point and intersects
"its" heating curve at an outside temperature of 0 °C. Its slope is calculated as follows:
s = T
V
: T
AM
and is adjusted on the controller.
The substitute lines are needed because the heating curve is slightly inflected. This is
required to compensate for the non-linear characteristics of the different types of radia-
tors and convectors.
The basic setting is to be made in agreement with the planning documentation or ac-
cording to local practices.
The heating curve is based on a room temperature setpoint of 20 °C.
3.3.5 Generation of setpoint
The setpoint is generated via the heating curve based on the composite outside tem-
perature.
2462B02
H
T
Vw
T
Rw
T
AM
0
0
-
s
Generation of setpoint with weather-compensated control, without a room unit
H Heating curve
s Slope of heating curve
T
AM
Composite outside temperature
T
Rw
Room temperature setpoint
T
Vw
Flow temperature setpoint
Weather-compensated
control
Without room unit
17


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