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11.17. Circulation function (CIRCU option)
It is possible to select from various functions and their combination for the circulation in the hot water line.
The circulating pump PWZ can be enabled with temperature and/or impulse control, depending on the selected
special time program.
Adjustment:
0: No function
1: Temperature-controlled and by time program (the temperature is defined by parameters). If the temperature is
below this value, the circulation pump starts up.
3: Temperature-controlled (on setpoint temperature)
4: Impulse-controlled * (e.g. a bathroom switching contact)
5: By time program
6: Temperature and impulse-controlled* (e.g. "PWZ on", if TWZ < 43 °C and impulse input closed. "PWZ off" if
TWZ > 45 °C or timer for run time of the pump PWZ has expired.)
7: Temperature and impulse-controlled and by time program* (e.g. "PWZ on" if TWZ < 43 °C and impulse input
closed and enable by the time program active. "PWZ off" if TWZ > 45 °C or timer for run time of pump PWZ
has expired or the block by time program is active.
8: Impulse-controlled and by time program*
If the circulation circuit enable temperature (05-054) on sensor TWZ is undershot by the differential gap 2 K,
circulation pump PWZ is switched on.
An impulse is triggered by drawing off water or by a button, which activates pump PWZ for the adjustable run time
"PWZ pump with impulse control" (05-070). A button, for example, is connected to the impulse input for this purpose.
*) Cannot be selected with two collector fields!
11.17.1. Menu: General
– CIRCU (circulation option)
Parameters
Designation
Value
Min.
Max.
Comments
R
W
05-006
Circulation function
0=inactive
Function for controlling a circulation
pump.
0 = Off
1 = Temperature-cont time
program
3 = Temperature-controlled
4 = Pulse-controlled
5 = Time program
6 = Tempe pulse-controlled
7 = Tempe pulse-controlled
+ time program
8 = Pulse-cont time program
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