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Siemens
Basic Documentation RVP360
CE1P2546en
Building Technologies
9 Function block: Space heating
2017-07-24
T
Rw
-
T
RM1
k
t
t
1
[ h ] = 2
*
———————
*
———
T
Rw
-
T
Rw
20
The duration of boost is limited to 2 hours.
t
2
52
2D
1
9
T
RM
T
R
t
1
T
RM1
T
Rw
T
Rw
T
Rw
T
Rw
Where:
k
t
Building time constant in hours
t
Time
t
1
Duration of boost of room temperature setpoint with boost heating
T
R
Room temperature
T
Rw
Setpoint for NORMAL room temperature
T
Rw
Setpoint for REDUCED room temperature
T
RM
Room model temperature
T
RM1
Room model temperature when boost heating is started
T
Rw
Room temperature setpoint
T
Rw
Boost of room temperature setpoint (with boost heating)
9.5 Room
functions
9.5.1 Maximum limitation of room temperature
For the room temperature, it is possible to have an adjustable maximum limitation.
Required for that purpose is a room sensor or room unit.
A room temperature lying 1 °C above the limit value leads to a room temperature
setpoint reduction of 4 °C. Maximum limitation of the room temperature is inde-
pendent of the setting made for the room influence.
If the room temperature lies above the limit value, the display shows
.
The flow temperature setpoint reduction T
Vw
is calculated as follows:
T
Vw
[K] = T
Rw
*
( 1 + s )
-1
-0,5
0,5
1
1,5
2
2,5
3
T
Rw
T
R
s
Heating curve slope
T
Rw
Room temperature setpoint reduction
T
R
Deviation of the room temperature
T
Vw
Flow temperature setpoint reduction
