How It Works; Important Safety Measures - Pool Controls Ozone Chemigem User Manual

How it works:

The Ozone Chemigem adds ozone to the pool water and continuously analyses pool water
chemistry while your pool system is running. The unit has two dosing pumps that feed
liquid chlorine and acid to the pool water flow in response to the water analysis from the
probe. Ozone is a powerful oxidiser and reacts with contaminants faster than chlorine. This
means that the chlorine added is used to maintain a residual rather than oxidise
contaminants. Ozone reduces the chlorine (and hence acid and buffer) usage of the pool
and breaks down more contaminants than chlorine alone.
Note: the filter system should always be running when the pool is being used.
Oxidation Reduction Potential
The Ozone Chemigem measures how much chlorine is in pool water by measuring the
ORP of the water. ORP stands for Oxidation Reduction Potential. Chemicals like chlorine
destroy pathogens (eg harmful bacteria) in water by oxidising them.
The level of oxidation available in the water can be measured chemically with an ORP
sensor contained in the Chemigem multielectrode (probe). This produces a voltage related
to the ORP of the water, which is a measure of the effectiveness of chlorine in the water.
Varying the ORP will affect how long it takes to destroy harmful bacteria in pool water. For
example, if ORP is maintained at 650mV, E-coli type bacteria will be destroyed in around
one second. However, if the ORP is lowered to 550mV, the same organisms may take up
to 2 hours to be eliminated.
pH Control
When chlorine is added to water the pH always changes – this is because chlorine is not a
neutral chemical. The pH will slowly rise as chlorine is added to the water. A rise in pH
greatly reduces the effectiveness of the chlorine as a sanitiser, so it is important to ensure
that the pH remains in the correct range.
The pH of the water can be lowered by the addition of acid – and your Ozone Chemigem
does this automatically. The Ozone Chemigem multielectrode (probe) measures the pH of
the water and doses the pool with small amounts of acid to keep the pH in the correct
range.
• Always add concentrated chemicals to water – not the other way around!
• Don't allow chemicals to mix – dangerous, highly corrosive fumes will be
produced.
• Always wear protective clothing, footwear, gloves and eye protection
when handling pool chemicals to avoid injury.
• If a spill occurs, wash the affected area with fresh water immediately and
seek medical attention.
• Work in a well-ventilated area and avoid inhalation of fumes.
• Read and follow safety instructions on chemical drums.

IMPORTANT SAFETY MEASURES:

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