Toro Aqua-Clear ACS-218-12VDCL Important Safety Instructions Manual page 13

If you decide during the initial programming to change a variable which you have already
passed, you can reach it by cycling all the way through the remaining functions to be
programmed, and loop back to the function to be changed.
Any time changes to the configuration settings are desired, this stage can be entered by
pressing and holding the ENTER key.
Program Settings
Following is the sequence of controller functions that will appear after entering the programming
cycle:
1. Flush Time
Defines the duration of the flushing time per station. The following options are selectable:
5-20 seconds in steps of 1 second
20-55 seconds in steps of 5 seconds
1-6 minutes in steps of 0.5 minutes
A typical flush time setting is 1 to 2 minutes. The proper flush time can vary with the
contaminant load of the water, season, and several other factors. See the general filter
instruction manual for guidance on how to fine tune the flush time based on observation of the
flush water.
2. The PD Set Point
This sets the value of the pressure differential that will initiate a flushing cycle.
Typical setting is 5-7 psi.
3. The Flush Mode
This sets the method by which the controller will trigger a backwash cycle.
The typical setting is "By Time". In this setting, both the time and the pressure differential can
trigger a backwash cycle; if the PD sensor calls for a backwash before the timer does, a
backwash will occur (and the timer will be re-set). If the PD sensor has not called for a
backwash within the timer cycle, the timer will trigger a backwash, and the timer will re-set.
The length of time to set in this field varies widely with how dirty the water is, how much the
filters are used, and several other factors. To optimize this setting, growers often check how
frequently the filters are backwashing by the PD trigger, and set the timer for a period of time
20% longer than the frequency called for by the PD sensor. A typical initial setting is 4-8 hours.
4. Accumulations Readout
There is nothing to set at this point – it is an informational readout on the amount of
backwashing that has been occurring. There are three consecutive readouts: DP, time, and
manual. Each step indicates the # of backwash cycles triggered by either DP, time, or manual.
Cycle through these using the ENTER key.
Aqua-Clear Automatic Backwash (ENG/SPA) pg. 13