Treatments - Jacuzzi Delfi pro Uso-Mantenimiento

u
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.
u A high TA value (greater than 150 mg/l), even if it does not
involve 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.
Water hardness
Water is called "hard" or "soft" according to the quantity of cal-
cium and magnesium salts present in solution.
u Hardness, which can be controlled with appropriate kits that
are found on the market, is expressed in French degrees (°f) or in
mg/l of calcium carbonate (CaCO
u Hard water, that is with a carbonate content of over 150 mg/l (>15
°f), can easily cause scale deposits on the tub sides and the hosing.
To resolve these problems it is advisable to install a cation re-
sin scale remover (softener), adjusting the minimum residual
hardness to 10 °fr (100 mg/l of CaCO
use special chemical products (called organic or inorganic seque-
strants) that inhibit the formation of carbonate crystalline.
u In the case of water with a hardness lower than 10 °f (100
mg/l of CaCO ), which can occur when using mountain water
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supplies or in the case of particular geological areas, it is conve-
nient, in order to avoid corrosion phenomena on the spa metal-
lic components, to use suitable products to block and neutralize
the excessive amounts of CO

■ Treatments

Super-chlorination (or "shock treatment")
Just after installation, and/or after long periods of non-use, the
spa must be subjected to super-chlorination treatment, or shock
treatment. This is to completely disinfect the tub.
The frequency of super-chlorination depends on the frequency of
use of the spa. Afterwards, maintenance treatments will be sufficient.
u Fill the spa until the highest nozzles are covered (i.e. the ones
on the backs.
u Check that the pH, the total alkalinity TA and the water
hardness are correct; if not, act according to the recommenda-
tions in the related paragraphs.
).
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. As an alternative, you can
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(carbon dioxide) that are present.
2
CAUTION
Before adding with the addition of disinfectant always
check, and if necessary correct, the pH value.
u Add 5÷10 mg/l of chlorine in quick dissolving granules to
the water in the spa.
CAUTION
Do not use the skimmer basket to introduce chemical addi-
tives. If solid additives are used, you are advised to dissolve
them beforehand in a bucket or use a purposely-designed
basket available from specialist distributors. The Manufac-
turers specific instructions and recommendations must be
carefully followed for use of the above substances.
u Set the filtering cycle to "continuous" mode (see the related
chapter) and let it operate until the level of chlorine residue in
the water drops to normal levels (2÷3 mg/l); this normally oc-
curs after a few hours (it is advisable, however, to leave the filtering
system in operation for at least half a day).
u As an alternative, you can also activate rapid filtering ("In-
stant Clear", see the corresponding chapter. When the time is up,
it is advisable to check the remaining level of free chlorine (see
above) and to run the function again in order to achieve the re-
commended values (2÷3 mg/l).
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-pla-
ted accessories etc.).
Other values of chlorine or bromine (> 10 mg/l) may not
be detected 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 responsibility, the
use of the SPA.
The dosage and method of use require qualified personnel.
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.
CAUTION
Before proceeding with the addition of disinfectant al-
ways check, and if necessary correct, the pH value.
u Add the slow dissolving stabilised chlorine to the water of
the spa.
CAUTION
Do not use the skimmer basket to introduce chemical
additives. If solid additives are used, you are advised to
dissolve them beforehand in a bucket or use a purposely-
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