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Siemens Building Technologies
Basic Documentation RVA47.320
CE1P2379E
HVAC Products
Description of the heating engineer settings
15.07.2002
Heating circuit values
4.27
Parallel displacement of the heating curve
•
Adjustment of controller's temperature scale to the actual plant conditions.
Produces a parallel displacement of the heating curve in order to achieve a better
match of room temperature setpoints and actual room temperatures.
1. Press the operating line selection buttons to select operating line 100.
2. Press the + / – buttons to set the parallel displacement..
Setting range
Unit
Factory setting
-4.5...+4.5 °C
(K)
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 controller always
produces a room temperature of 22 °C (independent of the prevailing outside
temperature), displace the heating curve 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
D
02
100
0
10
10
0
30
TR
w
TA
TV
TV Flow
temperature
TA
Composite outside temperature
TRw
Room temperature setpoint
4.28 Room
influence
•
More accurate room temperature control due to temperature checkback signal from
the space
•
Use of heat gains
•
Possibility of boost heating and quick setback
Benefit
Description
Setting
Effect
Example:
Parallel displacement
Benefit
