Pentair Posi-Chlor-15 - Maintenance; Cleaning the Electrolysis Cell; Checking and Maintenance of the ORP Probe (OPTIONAL)

Posi-Chlor® Salt Water Chlorinator Owner’s Manual
34
6. MAINTENANCE
Carefully follow the recommendations and safety warnings detailed in section 1.4 of this
manual.
The chlorinator has a self-cleaning system of the chlorination cell, which reduces
maintenance considerably. In any event, it is advisable to clean the cell and check the
chlorine (ORP), free chlorine or pH probe if available.
Bear in mind that both the electrolysis cell and the ORP probe wear out through use. If after
cleaning, the equipment does not work normally, the probe or cell should be replaced. Your
dealer will be able to advise you on the need to change these elements.
6.1 Cleaning the electrolysis cell
The electrolysis cell should be cleaned in the following circumstances:
• If the low level of salt indicator comes on and the concentration is correct.
• If the overload indicator comes on and the level of salt is correct.
• If lime scale is observed on the surfaces of the electrodes. In this case, the equipment can
also be adjusted so that the frequency between each automatic cleaning operation is less.
This frequency will depend on the hardness of water in your area.
Submerge the cell in a hydrochloric acid solution, or use a commercial product to clean
electrolysis cells (CELL CLEAN). Do not use sharp objects that could damage the titanium
coating of the electrodes.
6.2 Checking and maintenance of the ORP probe (OPTIONAL)
Select Menu, and Man. Chl.
Adjust the chlorine to 0%. Go back to the display screen.
Rinse the probe carefully in clean water.
Insert the probe into a 465mV standard solution and stir gently. Observe the voltage on the
label, which corresponds to the ambient temperature at that time. Wait for the reading of
the ORP value displayed on the screen to stabilize.
Check that the value does not differ by more than about 10 mV of the value indicated on the
label. If the value is incorrect, it can be attempted to regenerate the probe by cleaning it. In
any event, annual cleaning is always advisable.
• Stir the probe in a glass of water, in which a spoonful of dish-washing detergent has been
mixed. Rinse well in clean water.
• Mix a commercial brand of hydrochloric acid at 23% in a glass, with four times its volume
of water. Leave the probe in the solution for a few minutes, stirring from time to time.
• Thoroughly clean the probe in pure, preferably distilled water. Shake the probe to remove
the water.