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6.5 Circulation pump operation during storage tank charging
With the setting FB26 = ON, the circulation pump continues operation according to the pro
-
grammed time schedule even during storage tank charging.
With the setting FB26 = OFF, the circulation pump is switched off as soon as the storage tank
charging pump is activated. The circulation pump returns to operate according to the time
schedule when the storage tank charging pump has been switched off again.
Function
WE Configuration
Circulation pump OFF FB26
6.6 Circulation over the heat exchanger
In systems, in which the DHW heating takes place in the storage tank charging system from the
primary circuit (Anl 5, 11), it is possible to keep the control of the charging temperature even
when the active storage tank charges are finished.
Function
WE Configuration
Circulation over the heat exchanger OFF FB32 = ON
6.7 Intermediate heating operation (Anl 2, 3 and 9)
With the setting FB9 = OFF, heating operation of the UP1 heating circuit is reactivated for a pe-
riod of 10 minutes after 20 minutes of priority (heating deactivated during DHW heating). Dur-
ing this time, DHW heating is interrupted.
Function
WE Configuration
Parallel pump operation OFF FB9 = OFF, select “20“
Note!
In system Anl 2 with circulation pump and switchover valve, the Intermediate heating operati
-
on function, set FB9 = ON and select “US“ and “20“.
6.8 Parallel pump operation (Anl 2, 3 and 9)
When the Parallel pump operation function is activated, the circulation pump UP1 remains
switched on during DHW heating unless certain operating situations occur. These situations in
-
clude, for example, those when the boost of the flow temperature exceeds 10 °C, or when the
maximum flow temperatureis exceeded. In this case, thecontroller applies priority operation,if
necessary with intermediate heating.
54 EB 5476 EN
Functions of the DHW circuit