Winterizing; Chemistry You Need To Know - Pentair IntelliChlor IC20 Installation And User Manual

Electrolytic Cell Cleaning
b. To acid clean the cell: Disconnect the IntelliClor cell communication cable from the cell. Remove
the AC power from the Power Center, either by switching off the filter pump or setting the
associated circuit breaker to OFF.
c. Mix one quart of muriatic acid with one gallon of tap water in a plastic bucket.
WARNING
Working with muriatic acid can be dangerous.
When cleaning elements always wear rubber
gloves and eye protection. Always add acid to
water, do not add water to acid. Always work in a
well-ventilated area. Splashing or spilling acid
can cause severe personal injury and/or property
damage.
d. Place the cell vertically in a five gallon bucket. Pour the acid solution (as described above) into the
cell until the blades are just covered. Allow the acid solution to bubble, and to clean the blades. The
acid should only be contained in the cell and not around it. A foaming action will begin, which is
caused by scale (calcium carbonate) being dissolved from the plates. If rigorous foaming action does
not begin, the cell does not need to be cleaned (STOP THE CLEANING PROCESS - go on to
step "d"). Otherwise, allow the cell to remain in the solution until the foaming has
stopped. However, do not leave in acid for more than 1/2 hour. Excessive Acid Washing will
damage electrolytic cell.
e. Remove the cell from the bucket and place in an empty five gallon bucket. Rinse the cell thoroughly
with clean tap water and inspect. If deposits are still visible, immerse the cell again in the solution for
further cleaning. Additional acid may need to be added to the solution.
f. Rinse the cell again with clean tap water and inspect. If clean, replace the cell and resume normal
operation.
g. If the acid wash procedure is necessary, it is recommended that a sample of pool water be analyzed
by an authorized IntelliChlor service representative for excessive hardness and/or improper water
balance.
h. If no scale or debris deposits are observed in the cell after two bimonthly inspections, it is not
necessary to continue bimonthly inspections. However, due to possible changes in pool water
chemistry and filtering effectiveness, it is recommended that the cell be removed for inspection at
least twice a year.
i. Insert the IntelliChlor cell cable plug into the Power Center connector, then restore AC power to the
Power Center.

Winterizing

Very little chlorine is needed in cold water. Below 52° Fahrenheit, chlorine production is stopped; the unit will
not produce chlorine. This low-temperature cut-off extends the life of the cell. If preventative measures are
not taken, freezing water may cause severe damage to the cell. Prevent freeze damage to the cell by running
the pool pump continuously or winterize the pool by draining water from pump, filter, and all intake and return
lines. Remove the cell, clean and store it.

Chemistry You Need to Know

1. Chlorine Stabilizer (cyanuric acid) is needed in outdoor pools to maintain proper levels of chlorine.
Most unstable chlorine is destroyed by the UV radiation from the sun within 2 hours. Chlorine
stabilizer should be maintained between 50 - 75 PPM. See Table 3, page 15.
(Continued)
Note: The IntelliChlor acid cleaning kit (P/N
520670) provides a cap for the IntelliChlor
unit to allow acid to be poured into the
electrolytic cell plates for cleaning.
IntelliChlor Installation and User's Guide
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