MODEL F71B/F71G/F67C/F67G/N75A/N75B
32
After changing the filter materials, please empty air in the materials
according to the above Step B.
In the process of trial running, please check the water situation in all
position, ensuring there is no filter materials leakage.
The time for Backwash and Fast Rinse position can be set and
executed according to the suggestions from the control valve suppliers.