29
Manuale Uso MP NIWA - Code 10011873 - Edition 1 - 03/2008
Instructions for operation
English
Water hardness
Water is called “hard” or “soft” according to the
quantity of calcium and magnesium salts present
in solution.
Hardness, which can be controlled with
appropriate kits that are easily 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 easily cause scale deposits
on the
mini-pool
sides and the hosing.
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 sequestrants)
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 supplies or in the case of
particular geological areas, it is convenient, in order
to avoid corrosion phenomena on the
mini-pool
metallic components, to use suitable products to
block and neutralize the excessive amounts of CO
2
(carbon dioxide) that are present.
Treatments
Checking the pH of the water
The pH of the water should be checked daily using
the bromide/pH measurement kit.
As explained above, the pH level indicates the
acidity or alkalinity of the water.
The ideal pH for the water in a mini-pool is
between 7.2 and 7.6.
The following factors may alter the pH of the
water:
- The chemical proper ties of the water
(hardness).
- Products or substances that may fall into the
water or be introduced by the user (perspiration,
creams, mud, etc.).
If the pH of the water is higher than 7.6, the
following eff ects may be observed:
- Cloudy
water.
- Reduced
eff ectiveness and increased consumption
of chemical products.
- Scale
build-up.
If the pH of the water is lower than 7.2, the
following eff ects may be observed:
- possible eye or skin irritation.
- corrosion of metal parts of the
mini-pool
.
When the mini-pool is fi lled, therefore, the fi rst
operation is to ensure that the pH of the water is
within the correct limits (7.2 - 7.6).
To do this, it is necessary to use the pH analyzer
included in the "CHEMICAL CONTROL KIT".
Procedure:
- Fill the test beaker to the level indicated (10ML)
with water from the mini-pool;
- Add 5 drops of SOLUTION 2 (PHENOL RED);
- Fit the lid and shake the solution.
- Compare the colour of the solution with the colour
chart.
Dosage and method of use
15 g of pH-Mini-pool will reduce the pH of 1 m
3
of water by 0.2 units (use the measuring flask
contained in the can).
Pour the necessary quantity of pH directly onto the
surface of the water, distributing uniformly.
Precautions
- The can should be tightly closed and stored in
a dry place, away from sources of heat and out
of the reach of children.
- In case of contact with the eyes, nose or mouth,
wash in plenty of water and consult a doctor.
- Do not smoke while handling these products,
since they may be infl ammable.
- Do not introduce chemicals into the water when
persons are using the mini-pool.
- Do not mix with other chemical products.
In case of accidents or ill-eff ects, consult a doctor
immediately.
If possible, show the label of the bottle to the
doctor.
Disinfecting the water
Numerous substances are constantly introduced
into the
mini-pool
: body secretions, products and,
if the mini-pool is installed externally, a variety of
natural materials.
Some of these substances, including perspiration,
creams, dust and cosmetics, are diffi
cult to eliminate
by simply fi ltering the water, and may give rise to a
build-up of micro-organisms such as funghi, algae
and bacteria, which multiply extremely rapidly in
warm water.
By introducing a small quantity of
bromide
daily,
the water can be maintained in perfect condition as
regards disinfection and oxidization. However, the
disinfection and oxidization properties of bromide
are fully eff ective only when the pH of the water is
within the values indicated.
0,9
1,3
2,2
5ML
10ML
5ML
10ML
3,3
6,0
Br
.
pH.
OT
O
mg/l.
PHENOL
RED
6,8
7,2
7,6
7,8
8,2
75 Grs.
50 Grs.
25 Grs.
10 Grs.
