Jacuzzi SKYLINE, Руководство по установке

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35
CHARACTERISTIC ELEMENTS AND DEFINITIONS
Before beginning disinfection of the spa, it is a good idea to
know which are the characteristic components and how they
interact; it is essential to establish the correct values by using
an appropriate test-kit, so as to plan optimum treatment.
For the purchase of a test-kit and its use, contact Jacuzzi ®
authorized service centres and retailers.
A final consideration: the quantity of chemical additives
that are used for water treatment are expressed in various u-
nits of measure; the most common are “
ppm ” (parts per mil-
lion), “mg/l ” (milligrams per litre) and “ g/m 3 ” (grams per cubic
metre) , which are all the same thing. An example will show
more clearly the amounts of the various substances required.
For example, if the spa can contain 1000 litres of wa-
ter and the level of chlorine must be 2 mg/l, this means
that each litre of water should contain 2 mg of chlorine.
Therefore, if we multiply 1000 x 2 we obtain the total
quantity of disinfectant, that is 2000 mg; on the other
hand, taking into account that 1000 mg is equivalent to
1 g, dividing 2000 by 1000 we have 2 g, and this means
that to reach a value of 2mg/l (or ppm, or even g/m
3 )
we must add 2 grams of chlorine in the spa.
pH
This parameter represents the concentration of hydrogen ions
(H
+ ) dissolved in water and the acidity or alkalinity of the wa-
ter, measured on a scale from 0 to14 (from 0 ÷ 7 = acid zone;
7÷14= alkaline zone).
The ideal value for a spa must be between 7.2 and 7.4; in fact,
if the water has higher values, the disinfectants become less ef-
fective, while scale deposits increase, to the detriment of the s-
pa surfaces and its components.
pH values lower than 7.2 also reduce the effectiveness of
disinfectants, they promote corrosion of spa metallic compo-
nents and can cause irritation for the eyes and skin.
The pH level can be controlled by appropriate ad-
ditives, that allow the values to be raised or lowered
according to each situation.
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 spe-
cialized dealer.
ATTENTION
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 (CaCO3).
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 CaCO3. As an alternative, you
can use special chemical products (called
organic or inorganic
sequestrants ) that inhibit the formation of carbonate crystalline.
In the case of water with a hardness lower than 10 °fr (100
mg/l of CaCO3) , which can occur when using mountain water
supplies or in the case of particular geological areas, it is con-
venient, in order to avoid corrosion phenomena on the spa metal-
lic components, to use suitable products to block and neutral-
ize the excessive amounts of CO2 (carbon dioxide) that are
present.
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.