Davey SCMax 77 ECOMATIC Salt Water Pool Sanitizing System - Manual (Page 12)

12
Chlorine Production
The ECO-matic unit must be run daily to generate sufficient chlorine to sanitise the pool. If the level is too low either
longer running times are required or the System Control needs to be adjusted higher. Harsh local conditions such as
traffic pollution or windborne dust require different running times; in which case, seek advice from your pool shop. Without
sufficient filtration/chlorination, your pool will never function correctly. Always run the filtration system when swimming
in the pool.
In some cases you may find your chlorine level to be too high. To determine if this is the case, run your filter/chlorinator for
the suggested times/chlorine production level and test your pool water on the morning after operation. If your chlorine test
shows a high level of chlorine, either the running times can be reduced slightly, or the System Control can be turned anti
- clockwise. Test your chlorine level again the following morning at around the same time. If your chlorine level is still high,
repeat the above process until the correct level is attained.
Super Chlorination
Periodically, especially during extremely hot conditions, it may be necessary to boost the amount of chlorine in your pool
in order to maintain absolute sanitation of the water. This can be achieved by adding either liquid or granulated chlorine.
If granulated chlorine is added, the Cell must be checked regularly, since the additives from this product will clog the
electrodes. Alternatively, extend the running time of your ECO-matic.
General Information
Recommended Pool Water Chemistry
POOL
WATER
BALANCING
Free Chlorine
(ppm)
pH
Total Alkalinity
TA (ppm)
Calcium
hardness (ppm)
Stabilizer –
Cyanuric Acid
(ppm)
Salt Level
(ppm)
Ideal
reading /
Range
1 – 3 7.2 – 7.6 80 – 120
Concrete &
Tiled Pools:
250-400
25 – 50 4500 – 6000
To increase
Increase output
of chlorinator.
Add chlorine.
Increase
filtration time.
Add buffer
or soda ash
(Sodium
Carbonate)
Add Sodium
Bicarbonate
Add Calcium
Chloride
Add Cyanuric
Acid
Add Salt
To Decrease
Decrease
output of
chlorinator.
Reduce
filtration time.
Add
Hydrochloric
(Muriatic) Acid
Add
Hydrochloric
(Muriatic) Acid
Partially drain
& refill pool with
lower hardness
water to dilute.
Partially drain
& refill pool to
dilute
Partially drain
& refill pool to
dilute
Algae - Microscopic forms of plant life which enter the pool by rain, wind and dust. There are numerous varieties - some
are free floating whilst others grow on walls and in cracks and come in different colours. Some are more resistant to
chemical treatment than others.
Bacteria - The germs that contaminate your pool. Introduced by swimmers, dust, rain storms and other elements.
Balanced Water - The correct ratio of mineral content and pH level that prevents pool water from being-corrosive or scale forming.
Chloramines - Compounds formed when chlorine combines with nitrogen from urine, perspiration, etc. Chloramines
cause eye and skin irritation, as well as unpleasant odours.
Chlorine Demand - The chlorine required to destroy germs, algae and other contaminants in the pool.
Chlorine Residual - The amount of chlorine remaining after chlorine demand has been satisfied. This is the reading
obtained with your test kit.
Cyanuric Acid - Also known as stabiliser or conditioner. It reduces dissipation of chlorine by direct sunlight.
Liquid Acid - Chemical used to reduce the pH and total alkalinity in the pool water, and for cleaning chlorinator Cell.
ppm - An abbreviation for Parts Per Million the accepted measurement of chemical concentration in swimming pool water.
I ppm = l mg/L.