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Siemens Building Technologies Basic Documentation RVD230 CE1P2383en
HVAC Products 12 Function block Space heating 27.05.2004
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 circuit, of the d.h.w. circuit and – if the
RVD230 is also used for precontrol – of the external heat demand.
The heat demand of the heating circuit is determined either by weather-compensation,
weather-compensation with room temperature influence or room temperature compen-
sation.
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
or depressed.
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.
2383B01
H
T
Vw
ss
T
AM
T
Rw
/ /
Generation of setpoint with weather-compensated control without room unit
*
Multiplier
H heating curve
s
Heating curve slope
T
AM
the composite outside temperature
TRw Room temperature setpoint
TVw Flow temperature setpoint
Operating line 5 Adjustment of heating curve slope
Operating line 71 Adjustment of parallel displacement of heating curve
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