16 Description of function
32 99E13331xx-mub-en - V07 2021/03
An additional external circulation sensor can be defined. This can be useful to minimise the
runtimes of the circulation pump or to determine the temperatures of pipes with a bad
circulation.
The circulation function offers 3 operating modes which can be combined with each other.
• Temperature control
• Time control
• On demand mode
Depending on the activated mode, additional settings are required.
Operation mode "temperature control"
As a temperature sensor for the temperature control, either the cold water sensor (T-CW) or an
external temperature sensor can be selected. If the temperature measured at the selected
sensor falls below the switch-on temperature, the circulation pump is actuated. If the
temperature measured at the selected sensor is higher than the switch-off threshold (switch-on
temperature + ΔT Off), the circulation pump is switched off.
Operation mode "time control"
There are two possibilities to set the circulation pump in the menu item
Time control:
• Continuous operation - the circulation pump runs permanently without interruption
• Time control settings - the circulation pump runs only in a user-defined time window.
If the current time lies within a defined time window, the circulation pump is actuated. For each
day of the week, up to 5 time windows can be defined.
At
Circulation
→
Time control
→
Time control settings
, choose the timer (
Set
) and define one or
multiple time windows on the desired days.
First set the hour, then the minutes of the time when the circulation is meant to start. After
confirmation, set the hour and the minutes of the time when the circulation is meant to stop.
Please also confirm the end time to completely define the time window.
The time setting of a day can be copied to another day. To copy the settings, select the menu
item
Copy
. Then, select the day or the days to which the setting is meant to be copied. Finally,
select the menu item
Confirm
in the last line to complete the copying.
At
Circulation → Time control → Time control settings → Preview
, an overview of the defined
circulation times is displayed.
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