Zodiac eXO Series, Installation Manual, Page: 15 / 28

Page 15
Page 14
eXO
®
| Installation Manual
Section 6. Prepare and Balance the Pool
6.1 pH Regulation Principle
The amount of chlorine needing to be produced is
dictated by the pH level in the pool. As the pH level
rises, the amount of chlorine must be increased to
compensate, see Table 6.
6.2 Water Chemistry Table
Test and maintain correct water balance throughout the season, according to the table.
Free
Chlorine
pH Total Alkalinity
(ppm)
Calcium Hard-
ness (ppm)
Cyanuric Acid
(ppm)
Salt
Level (ppm)
Metal
South
African
Standard
1 -3 7.2 - 7.8 80 - 120 175 - 275 30 -50 4000 < 0.10
Ideal range
1 - 3 7.4 80 - 140 90 - 300 up to 50 4000 at 27°C
< 0.10
To Increase Add chlorine or
increase equip-
ment output
Add buffer or
soda ash (so-
dium carbonate)
Add sodium
bicarbonate
Add calcium
chloride
Add cyanuric
acid
Add salt or
minerals **
-
To Decrease Add muriatic
acid
Add muriatic
acid or dry acid
Partially drain
and refill pool*
Partially drain
and refill pool*
Partially drain
and refill pool*
Use appropriate
metal remover
In Season
Testing
Frequency
Weekly Weekly Weekly Weekly Weekly Monthly Monthly
NOTE: Test all equipment sensors quarterly.
*
Fill pool with water from the mains water supply. Do not use rain water or well water.
** Do not add salt directly into the skimmer. Do not initiate electrolysis until salt has fully dissolved.
*** Reading is True Calcium Hardness, not Total Hardness.
Table 7. Water Chemistry
+
-
10 min 10 min 10 min 10 min
Dosing Cycles
Time
pH
pH evolution
7,30
7,35
7,40
7,45
7,50
7,55
7,60
7,65
7,70
7,75
7,80
7,85
7,90
7,95
8,00
8,05
8,10
8,15
8,20
100%
75%
50%
20%
Factory Set Point = 7,4 pH
Table 6. pH Evolution