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Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 07.05.2014
The resulting flow temperature can be calculated as follows:
TV = TR + [ 2 + (TR - TAgem) - 0.005 * (TR - TAgem)2 ] * s
The impact of compensation variant Weather compensation with room influence on the
flow temperature setpoint is calculated as follows:
TV = TRw * (1 + s)
Key
Line no. Meaning
TV Resulting flow temperature adaption
TRw Room temperature setpoint readjustment (due to room influence)
TV Flow temperature setpoint heating circuit
TR Room temperature setpoint – heat gains + room influence
TAgem Composite outside temperature
s Heating curve slope
Line no. Operating line
HC1 HC2 HC3
721 1021 1321 Heating curve displacement
Parallel displacement of the heating curve is used to change the flow temperature
evenly across the entire outside temperature range or, in other words, if the room
temperature is always too high or too low, a readjustment must be made via parallel
displacement.
20 10 0 -10 -20
-30
90
80
70
60
50
40
30
°C
°C
100
0
10
10
0
30
T
R
w
8700
TV
7471d48/0910
Figure 18: Heating curve – heating curve displacement
Key
Line no. Meaning
8700 TA Outside temperature
TRw Room temperature setpoint
TV Flow temperature
Calculation
Heating curve
displacement
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