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
