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Siemens Building Technologies
HVAC Products
The basic setting is made according to the planning documentation or in compliance
with local practices.
The heating curve is valid for a room temperature setpoint of 20 °C.
If operation is not satisfactory with the basic setting, it is possible to manually enter a
permanent parallel displacement of the heating curve on operating line 71.
12.4
Generation of setpoint
The setpoint is always generated as a function of the demand for heat. It is generated
based on the heat demand of the heating circuits and of the d.h.w. circuit.
The heat demand of the heating circuits is determined either by weather-compensation,
weather-compensation with room influence or room-compensation.
12.4.1 Display of setpoint
The effective setpoint generated by the controller as a result of the different influencing
factors can be displayed on operating line 27 by keeping button
12.4.2 Setpoint of weather-compensated control
The setpoint is generated via the heating curve as a function of the outside temperature.
The temperature used is the composite outside temperature.
T
Rw
/ /
Generation of setpoint with weather-compensated control without a room unit
*
Multiplier
H
Heating curve
s
Heating curve slope
T
Composite outside temperature
AM
T
Room temperature setpoint
Rw
T
Flow temperature setpoint
Vw
Operating line 5
Setting of heating curve slope
Operating line 71 Setting the parallel displacement of the heating curve
Basic documentation RVD240
12 Function block Space heating
s
s
T
or
depressed.
T
AM
H
Vw
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CE1P2384en
27.05.2004
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