Heating Limit Switch - Siemens Synco 700 Series Basic Documentation

Rule of thumb
Settings
Building Technologies
HVAC Products
TOeff
SpTR
+
TR
TR × V
-
Due to the room temperature deviation
corresponds roughly to the value of:
Δ TFl= Δ TR × V × (sHc + 1)
Δ
TFl Flow temperature setpoint change
Δ
TR Room temperature setpoint change
V Room influence
During boost heating, the room temperature setpoint boost also produces an increase
of the flow temperature setpoint. In that case, the greatest of the 2 values is used for
generating the setpoint.
TRBoost
SpTR
+
TR TR × V
-
The resultant room temperature setpoint has a minimum limitation at 5 °C and a maxi-
mum limitation at 35 °C.

10.5.4 Heating limit switch

The heating limit switch can restrict the amount of heat delivered 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 10.5.1 "The composite and the attenuated outside
temperature"):
• The current outside temperature TO
• The composite outside temperature Toeff
• The attenuated outside temperature TostrDmp
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Heating circuit > Space heating
Operating line
Comfort heating limit
Economy heating limit
Heat limit with Comfort preset
Note the following:
• When the Comfort heating limit is set to "----" (no heating limit), a heating limit only
applies to Economy
mer operation
• When the Economy heating limit is set to "----" (no heating limit), the Comfort heating
limit takes effect in Economy
Boiler sequence controller RMK770
10 Heating circuit control
TFl
SpTFlDe
+
SpTFlHi
-
SpTRN
TODe
SpTR
+
- -
20 °C
Δ
TV, the change of flow temperature setpoint
sHc Heating curve slope
Sp
TRx Room temperature
MAX
TR
-
Range
---- / –5...25 °C
---- / –5...25 °C
Inactive / Active
and Protection mode. And there is no changeover to sum-
and Protection
+
TFl
+
TOHi
TOeff
Setpoint
TReff
Factory setting
17 °C
5 °C
Inactive
mode
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CE1P3132en
23.04.2009