Hayward PL-PLUS Operation Manual - Page 38

Chlorinator Operation / Water Chemistry

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Chlorinator Operation / Water Chemistry General Water Chemistry Salt is required only if you are using the chlorinator features on the Aqua Plus 16v Control. If you are NOT using the chlorinator, it is recommended that you follow all of the other chemistry recommendations besides salt. Refer to the description of the Aqua Plus 16v configuration menu for information on enabling/disabling the chlorinator (see page 17). Water Chemistry The table below summarizes the levels that are recommended by the Association of Pool and Spa Professionals (APSP). The only special requirements for the Aqua Plus 16v 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 24 76 .6 250 2.0 200 2.3 250 2.4 29 84 .7 300 2.1 400 2.2 34 94 .8 600 2.4 300 2.5 400 2.6 600 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 35

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Chlorinator Operation / Water Chemistry
General Water Chemistry
Salt is required only if you are using the chlorinator features on the Aqua Plus 16v Control. If you are NOT using
the chlorinator, it is recommended that you follow all of the other chemistry recommendations besides salt. Refer to
the description of the Aqua Plus 16v configuration menu for information on enabling/disabling the chlorinator (see
page 17).
Water Chemistry
The table below summarizes the levels that are recommended by the Association of Pool and Spa Professionals
(APSP).
The only special requirements for the Aqua Plus 16v 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.
35
ºC
ºF
Ti
Calcuim
Hardness
Ci
Total
Alkalinity
Ai
53
60
66
76
84
94
103
12
16
19
24
29
34
39
.3
.4
.5
.6
.7
.8
.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.
Si = pH + Ti + Ci + Ai - 12.1
-.2
0
.2
CORROSIVE
SCALING
75
75
100
100
125
125
150
150
200
200
250
250
300
300
400
400
600
600
800
800
1.5
1.9
1.6
2.0
1.7
2.1
1.8
2.2
1.9
2.3
2.0
2.4
2.1
2.5
2.2
2.6
2.4
2.8
2.5
2.9
OK