.
Expected Maintenance
Monitor your pool’s salinity level as frequently as you check your other water chemistry levels.
After the system has run for a time, your Cell will eventually need to be cleaned due to natural mineral scaling. The system
will notify you of this by turning on the “Cell Maint.” light. When illuminated, follow the cleaning instructions below.
IMPORTANT: The frequency of cleaning depends on your water chemistry and the Saturation Index of the water. For
most people, cleaning is only necessary a handful of times per season. More rapid mineral build up is sure sign of a
chronically high Saturation Index; it is possible for imbalanced chemistry to cause scaling to occur quite rapidly. Consult
a pool professional for additional help.
Cleaning the Electrolytic Cell
Once substantial deposits have built up on the titanium plates in the Cell, the “Cell Maint” LED will illuminate, and the
mineral scaling must be removed. The Cell may require cleaning even if debris or build-up is not immediately visible
to the eye. If the “Cell Maint” LED is on, it typically means the Cell must be cleaned.
IMPORTANT: If mineral build-up is severe, more than one cleaning may be necessary to dissolve remaining solids.
Inspect Cell plates closely with a bright light after cleaning. If you can see any remaining scaling, debris, or physical
blockages through Cell, repeat the cleaning process as needed. If “Cell Maint.” comes back on soon after cleaning
(check a few minutes after restoring power): 1) verify salinity is in range; 2) ensure Cell is completely full of water
during operation; 3) verify system’s cell version setting; and then 4) clean Cell again.
Before removing the Cell for cleaning or replacement:
1) Turn off all power to all pool equipment, close supply line valves if applicable.
2) Unplug the Cell cable connecting the Cell to the Control Module.
3) Disconnect the Cell by unscrewing the Threaded Collars around the unions where the Cell attaches to the plumbing.
4) Remove entire Cell from between the unions. DO NOT pull or hold the Cell by its cable.
To clean the Cell of mineral buildup:
1) Attach Cleaning Cap or Cleaning Stand (sold separately, available at www.circupool.com) and orient the Cell
vertically. Place on the ground and stabilize so as to remain upright and prevent spilling.
2) In a separate bucket, mix one part muriatic acid into four parts water. Pour this weak acid solution directly into
Cell. Ensure that the cleaning solution COMPLETELY covers the components the inside of the Cell.
3) Wait for foaming to stop. Allow solution to soak for no more than fifteen minutes.
4) Properly dispose of acid solution, and use a hose to generously flush any remaining debris out of the Cell.
5) Look inside the cell to check that no debris or scaling remains. Repeat steps 2-4 if necessary.
6) Reinstall Cell into PVC return line.
Note: if you don’t currently have a Cleaning Cap or Cleaning Stand, you can completely immerse the cell body in a
five-gallon bucket. For instructions, see guides listed under www.circupool.com/help
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