Heating Limit Switch - Siemens Synco 700 Basic Documentation

Settings
Settings
Building Technologies
HVAC Products
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
Influence of wind speed
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
TOeff
SpTR
+
SpTR - TO
-
TO
Vwd
Δ
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
The wind speed 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...20 m/s is the factory setting.
Setting of the wind influence must always be matched to the location of the building.
The setting to be made is the room temperature drop
speed of 20 m/s at a room temperature of 20 °C and the design temperature A, which
corresponds to the lower curvepoint.
Based on this parameter and the current (slightly) attenuated wind speed, the controller
calculates the flow temperature readjustment
Vwd – 0.8
Δ TFl = ×
19.2
9.5.4

Heating limit switch

The heating limit switch is capable of deactivating the heating circuit pump and of
shutting down the supply of heat to the heating circuit.
This prevents the waste of heating energy at higher outside temperatures.
To determine the heating limit, the following outside temperature values are taken into
consideration (refer to subsection 9.5.1 "The composite and the attenuated outside
temperature"):
• The actual outside temperature TO
• The composite (effectively used) outside temperature TOeff
• The attenuated outside temperature TostrDmp
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Heating circuit 1 (or 2 or 3 ) > Space heating
Operating line
Comfort heating limit
Economy heating limit
Heat limit with Comfort preset
The following applies:
Modular Heating Controller RMH760B
9 Heating circuit control
Range
---- (none) / 0.0...10.0 K
TFl
SpTFlDe
SpTFlHi
SpTRN
TODe TOHi
Vwd - 0.8 SpTR - TO
TFl = ×
20 - 0.8 20 - TODE
Δ
TFl due to the wind.
SpTR – TO
× Δ TRwdNorm × (sHc + 1)
20 – TODE
Range
---- / –5...25 °C
---- / –5...25 °C
Inactive / Active
Factory setting
----
.
sHc
+
TFl
-
sHc
TOeff
× TRwdNom × (sHc + 1)
Δ
TrwdNorm resulting from a wind
Factory setting
17 °C
5 °C
Inactive
129/238
CE1P3133en
05.02.2007