Compu Pool E-Series Manual
6
5.0 THE CHEMISTRY INVOLVED
5.1.1
The E-Series Commercial Chlorine Generator by electrolysis creates chlorine to
sanitize the pool using the salt (NaCL) in the water. A small electric charge is
applied across a set of titanium plates inside the Electrolytic Cell(s). This produces
Sodium Hypochlorite (NaOCl). In water, Sodium Hypochlorite dissociates into
sodium (NA+) and hypochlorite (OCl-) ions.
5.1.2
It is the hypochlorite ions that form with the hydrogen (H+) ions (from the water) to
form hypochlorous acid (HOCl), which is the active agent that destroys bacteria and
algae, and oxidizes organic matter. This form of chlorine works quickly in the pipe,
leaving only a mild residual in the pool.
6.0 WATER CHEMISTRY
6.1
WARNING: Prior to turning on the E-Series Chlorine Generator for
the first time (including reopening the pool for the new pool
season) the water chemistry must be balanced according to the
following guidelines.
6.1.1
With proper filtration and chemically balanced water the pool should be clear and
sparkling. Unbalanced water can result in scaling, corrosion of pump equipment
and inefficient operation of the E-Series system.
6.2
Recommended Salt and Pool / Spa Chemistry Readings
Swimming Pools
Spas
Free Available Chlorine
1.0
– 3.0 ppm
3.0
– 5.0 ppm
pH
7.2
– 7.8
7.2
– 7.8
Total Alkalinity
100
– 120 ppm
100
– 120 ppm
Calcium Hardness
200
– 300 ppm
150
– 200 ppm
Stabilizer (Cyanuric Acid)
30
– 60 ppm
30
– 60 ppm
Total Dissolved Solids
< 1,200 ppm
< 1,200 ppm
Salt Residual
Optimal 3500 ppm
Optimal 3500 ppm
6.2.1
pH Levels.
pH produced by a chlorine generator is close to neutral pH. However,
other factors usually cause the pH of the pool water to rise. Therefore, the pH in a
pool chlorinated by a chlorine generator tends to stabilize at approximately 7.8.
This is within national standards. If the pool pH rises above 7.8, have a pool
professional test to see if other factors such as high Calcium Hardness or Total
Alkalinity are the cause, and then balance accordingly.
