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Function
WE Configuration
Return flow sensor RüF1, 2, 3 OFF
1.0
Co1, 2, 3 -> Fb01 = ON
Limitation factor / 0 to 25.5
Parameters
WE Parameter level / Range of values
Max. return flow temperature 65 °C PA1, 2, 3 / 20 to 90 °C
Min. return flow temperature 20 °C PA1, 2, 3 / 20 to 90 °C
In systems with a DHW in a secondary circuit, the control during DHW heating uses the
Return
flow limitation temperature for DHW
parameter (systems Anl 2, 4, 5 and 10). In the transition
time or in summer mode, the heating circuit can be operated with a lower return flow tempera
-
ture while at the same time performing proper storage tank charging.
The
Return flow limitation temperature for DHW
parameter can also be active in systems Anl 4,
5, 7, 8, 9 and 10 at a separate return flow sensor. The separate sensor RüFTW (return flow sen
-
sor for DHW) must in this case be installed in the return flow of the DHW circuit.
Note!
In system Anl 2 , the sensor RüFprim is installed in the return flow of the primary circuit. In this
case, the Return flow sensor, primary function must be activated (Co5 -> Fb01 = ON).
Function
WE Configuration
Return flow sensor in DHW circuit OFF
1.0
Co4 -> Fb02 = ON
Limitation factor / 0 to 25.5
Parameter
WE Parameter level / Range of values
Return flow limitation temperature for DHW 45 °C PA4 / 20 to 90 °C
Note!
To ensure that the preset return flow temperature limit can be met, make sure that
– the heating characteristic is not adjusted to ascend too steeply,
– the speed of the circulation pumps is not set too high,
– the heating systems have been calibrated.
60 EB 5179 EN
System-wide functions