Basic Documentation
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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 9 Heating circuit control 2017-09-29
Connection of a room temperature sensor does not automatically activate the room
influence.
An analog sensor can be used as a room temperature sensor (Extra configuration), or a
room unit transmits the room temperature signal via bus.
In plants where the heating circuit operates in connection with a ventilation system as a
room control combination, the room temperature sensor of the ventilation system must
not be located in the extract air
!
The set room temperature influence defines the gain factor with which the room
temperature deviation shall be weighted. The heating curve handles this amplified room
temperature as a readjusted room temperature setpoint.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit 1 (or 2 or 3) > Optimizations/influences
Operating line
Range
Factory setting
Room influence
---- / 0…10
----
3131B20
TOeff
+
-
SpTR
TR
20 °C
SpTFlDe
SpTFlHi
SpTRN
TFl
TOeff
TODe TOHi
+
-
+
-
+
+
TFl
SpTR
TR × V
-
Due to the room temperature deviation ∆TV, the change of flow temperature setpoint
corresponds roughly to the value of:
∆TFl=∆TR × V × (sHc + 1)
∆TFl
Change of flow temperature setpoint
sHc
Heating curve slope
∆TR
Change of room temperature setpoint
Sp
Setpoint
V
Room temperature influence
TRx
Room temperature
During boost heating, the room temperature setpoint increase also produces an
increase of the flow temperature setpoint. In that case, the greatest of the 2 values is
used for generating the setpoint.
3131B22
SpTR
TR
+
-
TR
TR × V
-
TRBoost
MAX TReff
The resulting room temperature setpoint has a minimum limitation of 5 °C and a
maximum limitation of 35 °C.
Only one solar intensity sensor can be connected to a controller. For configuration and
parameterization, refer to chapter 13 "Function block miscellaneous".
The impact of solar radiation is to be set individually for each heating circuit. It can be
deactivated (setting "---").
⇒
Settings
Rule of thumb
Impact of solar radiation