Heat Demand Dc 0; Changeover Of Operating Mode - Siemens RVA63.280 Basic Documentation

Note
Siemens Building Technologies
Landis & Staefa Division
2.55.4 Heat demand DC 0...10 V
External consumers can transmit a demand for heat in the form of an analog signal of
DC 0...10 V. The controller converts this voltage signal to a temperature setpoint of
0...130 °C and considers this value when generating the setpoint of boiler temperature
control.
[v]
10
8
6
4
2
0
10 20 30 40
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:
=
[V]
" Wärmeanfor
2.55.5

Changeover of operating mode

Setting 5/6)
Using a modem, for example, the operating mode of heating circuit 1 or 2 can be
switched to stand-by . When the contact connected to terminal H1 is closed, the
signal lamp or the operating mode button will then flash.
Setting 5: the operating mode of heating circuit 1 will change when the contact is
closed. D.h.w. heating remains unchanged.
Setting 6: the operating mode of heating circuit 2 will change when the contact is
closed. D.h.w. heating remains unchanged.
These settings have no impact on other controllers in the system.
Optimally, this function can also be accomplished with the help of terminal H2 and
setting line 174.
Basic Dokumentation RVA63.280, RVA53.280
90 100 110 120 130 [°c]
50 60 70 80
10 [V] " * aktuelleTe mperatur"
−
derungs Maximalwer
°
[ C]
°
t" [ C]
CE1P2374E
19.04.2001
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