Siemens RVA47.320 - With Room Influence

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Functions with no settings 15.07.2002
Heating’s switch-on point:
TVw = TRw + 4 S/10
TVw Flow temperature setpoint
TRw Room temperature setpoint
s Slope of the heating curve
7.3.2 With room influence
The automatic 24-hour heating limit operates depending on the current flow
temperature setpoint. If a room unit is connected, the room influence continuously
readjusts the flow temperature setpoint.
This means that the automatic 24-hour heating limit differs when room influence is
used.
The temperature basis used for this process are the values of the flow temperature
setpoint and the current room temperature setpoint.
If the flow temperature setpoint corrected by the room influence falls below the room
temperature setpoint plus a correction value, the heating will be switched off.
• Heating’s switch-off point:
16
31OEM
10
S
2TRw TVwk −+≤
If the flow temperature setpoint corrected by the room influence exceeds the room
temperature setpoint plus a correction factor, the heating will be switched on.
• Heating’s switch-on point:
16
31OEM
10
S
4TRw TVwk −+≥
TVwk Flow temperature setpoint corrected by the room temperature
TRw Room temperature setpoint
s Slope of the heating curve
Introduction
Process
Switching off
Switching on