Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 9 Heating circuit control 2017-09-29
Main menu > Commissioning > Settings > … or
Main menu > Commissioning > Heating circuit 1 (or 2 or 3) > Optimizations/influences
Operating line
Range
Factory setting
Impact of solar radiation
---- / 0.0…15.0 K
----
3131B23
TOeff
Isun
SpTFlDe
SpTFlHi
SpTRN
TFl
TOeff
TODe TOH i
sHc
-
+
TFl
sHc
TFl =
Isun × TRsnNom
1000 W/m
2
× (sHc + 1)
∆TRsnNom
Room temperature increase with 1000 W/m
2
Isun
Filtered solar radiation
sHc
Heating curve slope
The solar intensity sensor is to be configured via "Extra configuration". If required, the
controller’s DC 0…10 V input is to be matched to the sensor output.
DC 0…10 V
≅ 0…1,000 W/m
2
is the factory setting.
Setting of the solar radiation impact must always be matched to the type of building.
The setting to be made is the room temperature increase
∆TRsnNorm resulting from a
solar radiation of 1,000 W/m
2
.
Based on this parameter and the current (slightly) attenuated solar radiation, the
controller calculates the flow temperature readjustment
∆TFl due to solar radiation
(Isun) as follows:
∆TFl =
Isun × ∆TRsnNorm
× (sHc + 1)
1000
Only one wind speed sensor can be connected to a controller. For configuration and
parameterization, refer to chapter 13 "Function block miscellaneous".
The influence of the wind speed is to be set individually for each heating circuit. It can
be deactivated (setting "---").
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit 1 (or 2 or 3) > Optimizations/influences
Operating line
Range
Factory setting
Influence of wind speed
---- (none) / 0.0…10.0 K
----
The setting to be made is the room temperature drop resulting from a wind speed of
20 m/s. The influence refers to the design temperature at curvepoint
.
3131B24
TOeff
Vwd
SpTFlDe
SpTFlHi
SpTRN
TFl
TOeff
TODe TOHi
sHc
-
+
TFl
sHc
-
+
TO
SpTR
TFl =
× (sHc + 1)
Vwd - 0.8
20 - 0.8
SpTR - TO
20 - TODE
× TRwdNom
×
SpTR - TO
∆TRwdNom
Room temperature drop at 20 °C
sHc
Heating curve slope
SpTR
Room temperature setpoint
TODE
Outside temperature at the design temperature
TOeff
Effective outside temperature
Vwd
Filtered wind speed
Settings
Influence of wind speed
Settings