STA-RITE SC-75 Guia De Instalacion página 10

Optimum Pool Water Chemistry Conditions for Salt Water Pools
(using the SC-75 Salt Chlorinator)
In accordance with the Association of Pool and Spa Professionals (APSP) standards, it is recommended that the following
pool water chemistry conditions be maintained on an on going basis to help protect pool users, pool related equipment
and surfaces in and around the pool. These values are important to maintaining the pool equipment in proper operating
condition and preventing corrosion, liming or other problems. The SC-75 Salt Chlorinator is warranted to operate properly
only if these conditions are met. For more information, refer to your local agency having jurisdiction, NSPI (National Spa and
Pool Institute), the CDC (Centers for Disease Control), or the WHO (World Health Organization).
Free Chlorine:
Combined Chlorine (Chloramines): None (super chlorinate to remove all chloramines)
pH:
Cyanuric Acid:
Total Alkalinity:
Calcium Hardness:
TDS (includes salt):
Salt:
Metals (Copper, Iron, Manganese):
Nitrates:
Phosphates:
Saturation Index
Covered Pools and Vinyl Liner Pool and Lowering Chlorine Output Levels
When using the SC-75 Salt Chlorinator with covered pools and/or vinyl liner pools, less chlorine is needed. It is recommend
to lower the chlorine output level while the pool is covered.
Chlorine Testing
It is recommended that chlorine test samples be taken from two (2) locations in the pool. Compare the samples. A higher
level should be found at the pool return line. The higher level at the pool return line indicates the SC-75 is producing chlorine.
Take chlorine samples for testing at:
• The pool return line.
• 450mm below the surface and well away from the pool return line.
What Type of Salt to Use
The purer the salt, the better the life and performance of the SC-75 Salt Chlorinator. Use salt that is at least 99.8% pure NaCl,
sodium chloride. The preferred and recommended salt is an evaporated, granulated, food quality, non-iodized salt with no
additives. Consult your pool professional/salt supplier.
• Avoid using salt with anti-caking agents (sodium ferrocyanide, also known as YPS or yellow prussiate of soda). Filling
agents can cause some discoloration of fittings and surface finishes in pool.
• Water conditioning salt pellets are compressed forms of evaporated salt and may be used, but will take longer to dissolve.
Such pellets could damage pool plaster and other surfaces in and around the pool.
• Do not use calcium chloride or potassium chloride as a source of salt. (Use sodium chloride only).
• Do not use Rock salt (insoluble impurities mixed with the rock salt can shorten the life of the SC-75).
2.0 - 4.0 ppm. Above 4.0 ppm may cause corrosion of metal components
7.2 - 7.8 (USE MURIATIC ACID to lower pH and Soda Ash to raise pH.)
30 - 50 ppm
80 - 120 ppm
200 - 400 ppm
3000 minimum to 5700 to 6000 maximum ppm
3000 - 4500 ppm (ideal 3400 ppm)
None
None
Less than 125 ppb
-0.3 to 0.3 (zero (0) best)
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