5 Circulation mode
10
99640141x-mub-en - V02
2017/07
5
Circulation mode
The domestic hot water module is equipped with a circulation pump.
For the operation of the circulation pump, three possible operation modes are stored in the
controller (see controller instructions, page 21).
•
Pulse-controlled operation (depending on the demand / requirements):
The short actuation of a hot water tap (tap pulse: ~2 sec.) starts the circulation pump.
The circulation pump will then run for several minutes (adjustable).
•
Time-dependent operation:
The operation of the circulation pump can be set on a week clock within freely
selectable periods of time. In this operation mode, the circulation is activated at the
beginning of the period of time chosen. The circulation will stop after the end of the
chosen period of time.
•
Temperature-dependent operation:
In this operation mode, the circulation is only activated if the adjustable minimum
temperature at the circulation temperature sensor is not reached during the chosen
period of operation. The circulation stops after the required temperature has been
reached or after the end of the chosen period of time.
The operating modes can be combined with each other as wished, f. ex. the time- and the
temperature-dependent operating modes. The circulation is only activated if the temperature at
the circulation temperature sensor falls below the required value and if the time window is
active.
Outside the time slot, the circulation pump can be activated by a tap pulse if the pulse-controlled
operation mode is additionally activated.
NOTICE
Damage to property!
When the DHW module is delivered, the circulation is not activated (see controller instructions,
page 15). During commissioning the operation mode must be selected and pre-set under all
circumstances. The revolution speed of the circulation pump must be defined by the PWM
signal (factory setting: 100 %).
