Hayward OmniLogic Installation Manual - Page 8

Preparing Pool/Spa Water General Water Chemistry Salt is required only if you are using the chlorinator features on the OmniLogic Control Center. If you are NOT using the chlorinator, it is recommended that you follow all of the other chemistry recommendations besides salt. Water Chemistry This table summarizes the levels that are recommended by the Association of Pool and Spa Professionals (APSP). The only special requirements for the OmniLogic are the salt level and stabilizer. Saturation index The saturation index (Si) relates to the calcium and alkalinity in the water and is an indicator of the pool water "balance". Your water is properly balanced if the Si is 0 ±0.2. If the Si is below -0.2, the water is corrosive and plaster pool walls will be dissolved into the water. If the Si is above +0.2, scaling and staining will occur. Use the chart below to determine the saturation index. Si = pH + Ti + Ci + Ai - 12.1 ºC ºF Ti Calcuim Hardness Ci Total Alkalinity Ai 12 53 .3 75 1.5 75 1.9 100 1.6 100 2.0 16 60 .4 125 1.7 125 2.1 19 66 .5 150 1.8 150 2.2 200 1.9 200 2.3 24 76 .6 250 2.0 250 2.4 29 84 .7 300 2.1 300 2.5 400 2.2 400 2.6 34 94 .8 600 2.4 600 2.8 39 103 .9 800 2.5 800 2.9 How to use: Measure pool pH, temperature, calcium hardness, and total alkalinity. Use the chart above to determine Ti, Ci,and Ai from your measurements. Insert values of pH, Ti, Ci and Ai into the above equation. If Si equals .2 or more, scaling and staining may occur. If Si equals -.2 or less corrosion or irritation may occur. -.2 0 .2 CORROSIVE SCALING OK The pool's chemistry must be balanced BEFORE activating the OmniLogic's optional chlorinator function. NOTE: If the pool does not have new water, add metal remover and non-copper based algaecide to the pool, per manufacturer's instructions. This ensures a quick, troublefree transfer to the OmniLogic system. 4 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS