Installation and operating instructions
Fresh water station WHI freshaqua 22
4 Dimensioning and Planning
83514302 ▪ 1/2017-08 ▪ Ext. PAW
16-32
4.2
Circulation mode
The fresh water station WHI freshaqua 22 #2 and #4 is equipped with a circulation pump.
Three possible operating modes are stored in the controller for operating the circulation
pump (see also operating instructions of controller, menu "Func" / "F02"):
Pulse controlled operation (requirement dependent / demand):
The circulation pump is started by briefly opening a hot water tap point (tapping pulse:
~2 seconds). The circulation pump then only runs for a few minutes (can be set).
Time-dependent operation:
The operation of the circulation pump can be set on a week clock within a freely
definable time period. With this operating mode, the circulation is started at the beginning
of the set time period. The circulation is switched off after the set time period has
elapsed.
Temperature-dependent operation:
With this operating mode, the circulation is only started if the minimum temperature that
can be set on the circulation temperature sensor is not exceeded within the operating
period. The circulation is switched off after reaching the nominal temperature that can be
set or after the set time period has elapsed.
The operating modes can be combined as desired, e.g., time and temperature-
dependent operation. In doing so, the circulation is only active if the temperature on the
circulation temperature sensor has exceeded and the time window is active.
Outside the time window, the circulation pump can also be activated via a tapping mode
when the additional pulse controlled operation is activated.
NOTICE
Damage to property!
In its delivery state, the circulation is not activated yet
(see operating instructions of the controller, menu "Func" / "F02"
to "OFF").
If the circulation line is installed, the operating mode must be
selected and pre-set under all circumstances. The revolution
speed of the circulation pump must be specified via the PWM
signal (factory setting: 40%).
