Siemens RVA63.280 - With Room Influence

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Siemens Building Technologies Basic Dokumentation RVA63.280, RVA53.280 CE1P2374E
Landis & Staefa Division 19.04.2001
4.2.2 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
2TRwTVwk −+≤
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
4TRwTVwk −+≥
TVwk Flow temperature setpoint corrected by the room temperature
TRw Room temperature setpoint
s Slope of heating curve
Introduction
Process
Switching off
Switching on