5 Circulation mode
10
996404631-mub-en - V02
2015/12
5
Circulation mode
The domestic hot water module is equipped with a circulation pump.
Three possible operating modes are stored in the controller for operating the circulation pump
(see controller instructions, page 29 ff).
Pulse-controlled operation (depending on the demand / requirements):
The short opening of a hot water tap (tap pulse: ~2 sec.) starts the circulation pump.
The circulation pump will then run for several minutes (adjustable).
Time-dependant operation:
The operation of the circulation pump can be adjusted within an arbitrary period of time
on a week plan. The circulation will start at the beginning of the period of time chosen.
It will stop after the end of the chosen period of time.
Temperature-dependant operation:
The circulation only starts when the adjustable minimum temperature on the circulation
temperature sensor is exceeded within the period of operation chosen. The circulation
stops after the required temperature has been reached or after the end of the chosen
period of time.
The modes of operation can be combined as required, e.g. time- and temperature-dependant
operation mode. The circulation is only active when the temperature at the circulation
temperature sensor falls below the required value and when the time window is active.
Outside the time window, the circulation pump can be started by a tap pulse when the impulse
driven operation mode is additionally activated.
NOTICE
Damage to property!
When the DHW module is delivered, the circulation is not activated (see controller instructions,
page 29). During commissioning the operation mode must be selected and preset under all
circumstances. The PWM signal must determine the speed of the circulation pump
(factory setting: 100 %).
