Functions of the DHW circuit

6.5Circulation 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

6.6Circulation 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

6.7Intermediate 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“.

6.8Parallel 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 temperature is exceeded. In this case, the controller applies priority operation, if necessary with intermediate heating.

54EB 5476 EN

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Samson 5476 manual Circulation pump operation during storage tank charging, Circulation over the heat exchanger

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