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Siemens Building Technologies
Basic Documentation QAA73.110 Room unit
CE1P2284en
HVAC Products
Description
of the heating engineer settings
10.07.2002
4.14 Parallel displacement of heating curve
HC1/HC2
A parallel displacement of the heating curve ensures a better match of room
temperature setpoint and actual room temperature.
1. Press the line selection buttons to select line
73
or
83
.
2. Press the + / – buttons to set the parallel displacement..
Line
HK
Setting range
Unit
Factory setting
73
1
–4.5...+4.5
°C
0.0
83
2
–4.5...+4.5
°C
0.0
By changing the value entered, all room temperature setpoints will be appropriately
raised or lowered. This allows the room temperature setpoints to be matched to the
effective room temperatures.
If a nominal room temperature setpoint of 20 °C adjusted on the room unit always
produces a room temperature of 22 °C (independent of the prevailing outside
temperature), the heating curve should be displaced downward by 2 °C.
Each setpoint readjustment, be it by changing the setting value or the operational level,
corresponds to a parallel displacement of the heating curve.
20
10
0
-10
-20
-30
90
80
70
60
50
40
30
°C
°C
24
06
D02
100
0
10
10
0
30
TR
w
TA
TV
TV
Flow temperature
TA
Composite outside temperature
TRw
Room temperature setpoint
Description
Line 73, 83
Effect
Example
Parallel displacement
