User Maintenance - Pentair STA-RITE SC-75P Installation Manual

Section 4

User Maintenance

This section describes how to maintain the SC-75 Salt Chlorinator.
Daily service
None is needed.
Weekly service
1. pH Level Test: Test the pH level of your pool water with a reliable test method. If necessary, adjust according to your pool
professional's recommendations. APSP's recommended ideal range for pH is 7.4 to 7.6, although 7.2 to 7.8 is an acceptable
range under APSP's guidelines.
Note: Never use dry acid (sodium bisulfate) to adjust pH in arid geographic areas with excessive evaporation and minimal
dilution of pool water with fresh water. A buildup of byproducts can damage the SC-75.
2. Total Alkalinity Test: Test the pool water for total alkalinity with a reliable test method. Adjust according to your pool
professional's recommendations. APSP's recommended ideal range for total alkalinity is 80 to 120 ppm.
3. Chlorine Test: Test the pool water the for free chlorine level with a reliable test method. Maintain ideal range by adjusting
the SC-75Salt Chlorinator Sanitize Output settings. See "More and Less Output Buttons".
a. Desired Free Chlorine is 2.0-4.0 ppm, per APSP recommendations.
b. Above 4.0 ppm of chlorine may cause excessive corrosion of metal components and possibly cause damage to
associated pool equipment.
c. It is recommended that free chlorine readings be taken from samples of pool water taken from two (2) places,
one at the pool return line, the other well away from the pool return line. Compare the test results. A higher
free chlorine level should be found at the pool return line. The higher free chlorine level at the pool return line
indicates SC-75 Salt Chlorinator is producing chlorine.
Monthly Service
To ensure that the correct chemical balance is maintained in your pool, it is important to perform the following recommended
salt and pool water tests every month using a reliable test method.
1. Salt Level Test: Check salt display lights on the unit and check that the green "GOOD" light is on and is not flashing.
a. If the red LOW LED salt light is on. Add salt to the pool water
b. If salt level does not rise after 24 hours, see "Troubleshooting"
2. Pool Water Sample: Take a sample of the pool water to your local pool store for testing.
3. Cyanuric Acid: Sample the pool water and test for cyanuric acid level using a reliable test method. When using the SC-75
Salt Chlorinator the recommended ideal cyanuric acid level is 30-50 ppm.
4. Calcium Hardness: Test pool water for calcium hardness level using a reliable test method. If necessary, adjust according
to your pool professional's recommendations. APSP's recommended ideal range for calcium is 200 to 400 ppm for pools.
5. Metals Test: It is recommended that the pool water be sampled and tested periodically for the presence of metals such
as copper, iron, and manganese. These metals can damage the SC-75 Salt Chlorinator and other related pool equipment and
should not be present in the pool water. If those metals are present, contact your pool professional.
6. TDS (Total Dissolved Solids): Test pool water for TDS level using test kit or by having a water sample tested by a pool
professional. If necessary, adjust according to your pool professional's recommendations. APSP standard of 3000 minimum
to 5700 - 6000 maximum ppm (which includes the salt) is recommended for salt pools.
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