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Siemens
Heating and D.h.w. Controller RVL481
CE1P2541en
Building Technologies
10 Function block "Space heating"
20.05.2008
t
25
40
D
0
4
T
RM
T
R
t
1
T
RM1
T
Rw
T
Rw
T
Rw
T
Rw
k
t
Building time constant in hours
t Time
t
1
Duration of room temperature setpoint boost with boost heating
T
R
Room
temperature
T
Rw
Setpoint of NORMAL room temperature
T
Rw
Setpoint of REDUCED room temperature
T
RM
Room model temperature
T
RM1
Room model temperature at the beginning of boost heating
TRw
Room temperature setpoint
∆
TRw Boost of room temperature setpoint (with boost heating)
10.5 Room
functions
10.5.1 Maximum limitation of the room temperature
For the room temperature, it is possible to have an adjustable maximum limitation. For
that purpose, a room sensor is required (sensor or room unit).
If the room temperature lies 1 °C above the limit value, the room temperature setpoint
will be lowered by 4 °C.
Maximum limitation of the room temperature is independent of the setting used for the
room influence.
If the room temperature lies above the limit value, the display shows
.
The reduction of the flow temperature setpoint
∆
T
Vw
is calculated as follows:
∆
T
Vw
=
∆
T
Rw
× (1 + s) [K]
-1
-0,5
0,5
1
1,5
2
2,5
3
T
Rw
T
R
2540
D05
s Heating
curve
slope
∆
TRw Reduction of the room temperature setpoint
∆
T
R
Deviation of the room temperature
∆
TVw Reduction of the flow temperature setpoint
