Times/Date Menu - Set Date, Clock, Holiday Period - Graf oneAdvanced Operation Manual

4. The wastewater treatment system's control unit
4.4.4 Times/date menu – set date, clock, holiday period
Times/date
Setting date + clock
Set holiday period
Delete holiday period
4.4.4.1 Holiday mode
Holiday mode activates energy saving. Holiday mode does not execute a normal treatment cy-
cle, but provides minimal ventilation to keep the aerated sludge viable. Also, there is no extrac-
tion of clear water.
Holiday mode may be activated only when the plant is not supplied with wastewater.
Alternatively, the wastewater treatment plant may simply continue in auto mode. Holiday mode
need not be set when the plant is operating in level dependent mode with underload detection.
The plant then switches automatically to an energy saving mode when wastewater is no longer
being supplied.
This sets the current date and clock time.
Set the start and end dates of the holiday period.
The holiday period then starts at midnight on the entered
starting date and ends at 11:59 pm on the entered end date.
Deleting the holiday period.
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