The recommended flush lengths are:
● For city water 5 seconds (maximum 10 seconds)
● For well water 10 seconds (maximum 20 seconds)
● For hot water 5 seconds (maximum 10 seconds)
Note that if the cleaning has to be improved, it is not useful to increase the flush length to longer than the maximum mentioned above. In that case it is better to flush more than once a day see Automatic flush when fouled.
The prefered length can be entered as follows:
1. Select the menu > “Chg. Flush mode?” > “Flush length”.
2. The display shows: x Seconds.
3. Use
and 
to set the prefered duration and confirm with 
● For city water 5 seconds (maximum 10 seconds)
● For well water 10 seconds (maximum 20 seconds)
● For hot water 5 seconds (maximum 10 seconds)
Note that if the cleaning has to be improved, it is not useful to increase the flush length to longer than the maximum mentioned above. In that case it is better to flush more than once a day see Automatic flush when fouled.
The prefered length can be entered as follows:
1. Select the menu > “Chg. Flush mode?” > “Flush length”.
2. The display shows: x Seconds.
3. Use
and to set the prefered duration and confirm with