Siemens RVA47.320 - Demand for Heat - Setting 4

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Description of the heating engineer settings 15.07.2002
4.61.4 Demand for heat - Setting 4
External consumers can transmit a demand for heat in the form of an analog signal of
DC 0...10 V. The RVA47.320 converts this voltage signal to a temperature setpoint of
0...130 °C and considers this value when generating the setpoint of the cascade.
[v]
0
2
4
6
8
10
10 20 30 40
50 60 70 80 90 100 110 120
130
[°c]
2379Z26
T = 130°C T = 50°C T = 70°C T = 90°C T = 110°C
S = 5°C
T = maximum value of heat demand
S = minimum limitation of heat demand = 5 °C
The setpoint for 10 V can be set with parameter ”Maximum value of heat demand”
(operating line 172, setting range 5...130 °C). The voltage corresponding to the
displayed temperature can then be calculated as follows:
C][ ""
C][ e"temperatur actual" *[V] 10
[V]
°
°
=
demandheat of valueMaximum