A.O. Smith PEARL ULTRA User Manual page 22

• Holiday Mode Setting
Holiday Mode can be selected in "Holiday Mode" setting item. You should
input the end of date of holiday to let the valve clean the media during
your holiday.
Once you turn on the "Holiday Mode", the valve's regeneration
only has two cycles.
Backwash and Rinse. "Advanced Settings" is as the follows:
Regeneration Days, Backwash duration and Rinse duration can be set
to control regeneration cycles of holiday.
ENG 20
• Advanced Settings
Automatic Calculate mode and Manual Settings mode can be selected
in the "Advanced Settings" item. The key regeneration parameters
(Capacity, Refill Time, etc.) can be calculated in the "Automatic Calculate"
mode.