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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
General control processes
04.11.2009
6.6 Quick setback with room temperature sensor
•
Making use of the building’s thermal storage capacity
Quick setback is dependent on whether or not a room temperature sensor is used. A
differentiation must therefore be made between quick setback with or without room
sensor.
This process has an impact only when a room temperature sensor is used.
Quick setback is started as soon as a change to a lower room temperature setpoint
takes place (e.g. switching times in automatic mode).
Quick setback is terminated as soon as the actual room temperature reaches the level
of the respective room temperature setpoint (TRx = TRw).
TRx Actual value of the room temperature
TRw Room temperature setpoint
H Quick
setback
When the room temperature setpoint changes, the heating circuit pump will be switched
off until the quick setback process is terminated. This means that the room temperature
falls quicker since the supply of heat from the flow or boiler is cut off.
If no room sensor is connected, quick setback will not be accomplished through this
process. For details, refer to section "Quick setback constant", operating line 702
EXP
.
Benefit
Description
Important
Process
20
15
°C
t
TRx
2371
D
08
TRw
ON
OFF
H
t
Effect
Note
