Itreatments - Jacuzzi Experience ALIMIA Installation Manual

Total Alkalinity (TA)
This parameter represents the quantity of some alkaline sub-
stances (carbonates, bicarbonates and hydrates) in the water.
With a low TA value (less than 80 mg/l) the pH may change
unexpectedly, with sudden and uncontrollable oscillations. This
makes it nearly impossible to maintain good water quality.
A high TA value (more than 150 mg/l), even if it does not in-
volve great inconvenience, can lead to water cloudiness and
cause problems related to the pH level.
To increase the TA value bicarbonate of soda can be
used, while to lower it dry acid is recommended. Refer
to the instructions on the packets for the quantity and
methods; if in doubt, contact a specialized dealer.
CAUTION:
If the alkalinity level becomes excessive, you
should completely drain the system, thoroughly
clean all the surfaces of the spa and re-fill with
fresh clean water. In areas where the water is very
hard, you are advised to fit a softener upstream of
the water supply or condition the water with an
anti-scaling product.
Water hardness
Water is called "hard" or "soft" according to the quantity of cal-
cium and magnesium salts present in solution.
Hardness, which can be controlled with appropriate kits that
are found on the market, is expressed in French degrees (°fr)
or in mg/l of calcium carbonate (CaCO 3 ).
Hard water, that is with a carbonate content of over 150 mg/l
(>15 °fr), can produce scale deposits on the tub sides and the
pipes.
To resolve these problems it is advisable to install a cation
resin scale remover (softener), adjusting the minimum residual
hardness to10 °fr (100 mg/l of CaCO 3 . As an alternative, you can
use special chemical products (called organic or inorganic se-
questrants) that inhibit the formation of carbonate crystalline.
In the case of water with a hardness lower than 10 °fr (100
mg/l of CaCO 3 ), which can occur when using mountain water sup-
plies or in the case of particular geological areas, it is convenient, in
order to avoid corrosion phenomena on the spa metallic compo-
nents, to use suitable products to block and neutralize the excessive
amounts of CO 2 (carbon dioxide) that are present.
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TREATMENTS
Super-chlorination (or "shock treatment")
Just after installation, or after long periods of non-use, the spa
must be subjected to super-chlorination treatment, or shock treat-
ment. This is to completely disinfect the tub. The frequency of su-
per-chlorination depends on the frequency of use of the spa. Af-
terwards, maintenance treatments will be sufficient.
Check that the pH, the total alkalinity TA and the water
hardness are correct; if not, act according to the recommen-
dations in the related paragraphs.
Place 5÷10 mg/l of chlorine in quick dissolving granules
in the water of the spa (pre-filters of the compensation tank).
CAUTION:
It is advisable to dissolve the grains beforehand in
a bucket, or to use a special basket available from
specialized distributors. The manufacturer's spe-
cific instructions and recommendations must be
carefully followed for use of the above substances.
Set the filtering cycle (see corresponding paragraph) ) and let
it operate until the level of chlorine residue in the water drops
to normal levels (2÷3 mg/l); this normally occurs after a few
hours (it is advisable, however, to leave the filtering system in
operation for at least half a day).
CAUTION:
Do not use the spa until the level of free chlorine
has dropped to normal levels (2÷3 mg/l). Do not
use the thermal cover during super-chlorination
as the chlorine can attack the metal parts
(chrome-plated accessories etc.). Other values of
chlorine or bromine (> 10 mg/l) may not be de-
tected by the test kit reactants, while there is ac-
tually an excessive amount present.
If disinfectants have been added in amounts over
10 mg/l, the operator must forbid, as his respon-
sibility, the use of the spa. The amounts and meth-
ods of use must be handled by specialized per-
sonnel.
Normal chlorination (or regular maintenance)
To ensure quality and avoid possible deterioration, the water
must be treated, or chemically conditioned.
The water level must be kept constant to guarantee correct
system operation.
Check that the pH, the total alkalinity TA and the water
hardness are correct; if not, act according to the recommen-
dations in the related paragraphs.
Add the slow dissolving stabilised chlorine to the wa-
ter of the spa.
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