Inst315
– Viron e-Quilibirum Series Chlorinator Instructions V07_14
20
Cyanuric Acid (CyA) is often recommended by or added to swimming pools to make the available chlorine last
longer. It is often called stabiliser or sunscreen. CYA bonds with chlorine ions which prevents the chlorine from
oxidizing bacteria and other contaminants. This effectively reduces the oxidization reduction potential (ORP) of
the chlorine in your pool.
Chlorine efficiency or activity is reduced even when low levels of CyA is present.
Total Alkalinity (TA) buffers pH or keeps the pH relatively stable. The pH of your pool water is crucial to making
your chlorine highly effective, even when the chlorine is present in low levels. Measuring and adjusting your TA on
a regular basis will help reduce acid consumption and help keep your pH level in check. Variable pH will also
create variable ORP readings with high pH meaning your EQ Chlorinator will produce more chlorine to reach the
set point ORP level than it would otherwise need.
CyA adds to the TA reading. If CyA levels of in excess of 50 ppm are present, it is good practice to divide the CyA
by 3 and subtract the result from the TA reading. Therefore if CyA is 60, and TA is 200, subtract 20 (CyA 60/3)
from 200 for a TA reading of 180.
CyA bonds to chlorine more effectively in sunlight hours. Therefore ORP readings will be lower in sunlight hours
than at night. As the chlorine bonds with CyA during sunlight hours, the ORP may drop as more than 100 mv.
This means the eQ chlorinator will drive higher levels of chlorine during sunlight hours as the chlorine is
temporarily bonded with CyA. After sunset, the CyA bond with chlorine will reduce, freeing up the chlorine to
oxidise with bacteria and exhibiting an increased oxidization potential reading on the eQ chlorinator.
Why use CyA at all? CyA is used to extend the life of chlorine when the chlorine is manually added in the form of
a tablet, granules or liquid and it is not monitored by a measuring device. This reduces the quantity and cost of
Summary of Contents for Viron eQuilibrium Salt Chlorinator
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