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OPERATING LIMITS
Readings to be taken weekly: test and adjust if necessary
Parameter
Target values
Salinity
pH level
Free chlorine
From 1.0 to
concentration
Stabiliser level
20 to 50 ppm
(Cyanuric Acid)
Other parameter checks possible
Total alkalinity
(TA)
Water hardness
From 150 to
In addition, temperature (T°) plays a major role in the proper functioning of your chlorinator :
Water temperatures lower than 10°C renders the system inoperative (error E7 appears), consider
winterising. Water temperatures higher than 32°C cancels out the effects of hypochlorite, so the
addition of chlorine pebbles is recommended if these high temperatures persist.
Once the salt is in the water (taking 24 to 48h to fully dissolve),
3 to 4 g/l
salt concentration will only vary slightly over the course of the
season.
In the event of excess salinity, partial draining of the pool may
be necessary in order to add fresh water.
Conversely, in the event of draining water or multiple
backwashes of the filter, it may be necessary to add more (see
Chapter 7).
Please note, a pH above 7.8 suppresses the disinfectant proper-
7.2 to 7.8
ties of hypochlorite.
Measurements must be taken from around the return jets
when the chlorinator is switched on, preferably in the morning
3.0 ppm
and out of direct sunlight.
This is due to the fact that hypochlorite is relatively unstable,
and UV light as well as high temperatures can lead to lower
readings.
Hypochlorite is a relatively unstable disinfectant, and therefore
when the stabiliser level is too low, hypochlorite reverts back to
salt too quickly, without having enough time to properly disin-
fect.
Conversely, when the stabiliser level is too high, the hypochlo-
rite in the pool can become locked.
Please note that if your stabiliser level is extremely high, it
may be necessary to partially drain the water in your pool (see
Chapter 10.3) in order to add fresh water without any stabiliser.
This level measures the concentration of mineral salts (carbo-
From 80 to
nates, bicarbonates, hydroxides) in the water and allows the
150 ppm
water balance to be stabilised / buffered. High TA levels inter-
fere with the effects of pH regulation, and scale deposits may
begin to appear; conversely, low TA levels will render pH regula-
tion completely unstable and therefore uncontrollable.
Water hardness represents the amount of calcium carbonate
present in your water.
300 ppm
High levels of water hardness can lead to scale deposits on
equipment, which may require the removal of calcium from
your water - please contact your pool maintenance technician
for help with this step.
Water hardness levels which are too low/high can also lead
problems with water balance, resulting in unstable pH levels
and rendering water treatment ineffective.
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