User manual LIMPIDO LTE DUO V1.0
OPERATION
(Contd.)
SETTING THE PRODUCTION LEVEL
The amount of chlorine needed to maintain the quality of a swimming
pool’s water is conditioned by numerous parameters:
■
Water acidity (pH)
■
Water hardness (TH)
■
Water temperature
■
Sunshine (UV rays)
■
Stabiliser level (Isocyanuric acid)
■
Volume of pool
In particular, the presence of a stabiliser imposes a free chlorine content
of 2mg/l (2ppm), while 0.4mg/l is sufficient to treat a pool without any
stabiliser. Similarly, the rise in pH (lack of acid), causes a rapid fall in
the amount of active chlorine contained in the water. Thus, when the pH
rises from 7.2 to 8.2, the level of chlorine falls from 70% to 20%.
100
90
80
70
60
50
40
30
20
10
0
5,5 6,0 6,5 7,0 7,5 8,0 8,5 9,0 9,5
STABILISER
Chlorine is gaseous at ambient temperature. Its solid form (briquettes, granules, etc.) is obtained by combining it with a cyanuric acid molecule.
This cyanuric acid plays the role of stabiliser since it protects the chlorine from degradation cause by UV rays from the sun. However, this
cyanuric acid is not consumed and accumulates inexorably in swimming pools treated with chlorine briquettes and ends up inhibiting the potential
of the chlorine. For public pools, the maximum concentration of cyanuric acid is set at 80 ppm (or mg/l).
Treatment by salt electrolysis avoids this overdosing of cyanuric acid, although it is recommended that you add, just once, when filling with water,
between 25 and 50 ppm (or mg/l) of stabiliser. With a high level of sunshine, in fact, 90% of free chlorine is destroyed within two to three hours in
the absence of cyanuric acid, while this proportion is reduced to 15% with 30pmm of stabiliser (cyanuric acid). Salt is available commercially
which is specially adapted for swimming pools and enhanced with an appropriate level of stabiliser.
MONITORING THE pH
In order to make the LIMPIDO® LTE DUO as effective as possible, it is essential to keep the pH of the
water between 7.2 and 7.6. As an indication, the table opposite sets out the running times keep the pH of
the water between 7.2 and 7.6 of the LIMPIDO© LTE DUO, depending on the volume of the pool basin
and the pH value, for water at a temperature of 25°C.
The water temperature varies throughout the season and the production time should be adjusted
accordingly.
This adjustment of the production, in accordance with the temperature, is done automatically by the
LIMPIDO© DUO when the AUTO mode is selected. It is, however, necessary to ensure that the filtration
period is sufficient in all cases
V
OLUME
(
M
3)
P
H
40
60
80
6.8
2
H
00
2
H
50’
3
H
50’
7.0 2
H
10’
3
H
15’
4
H
20’
7.2 2
H
30’
3
H
40’
5
H
00’
7.4 3
H
00’
4
H
30’
5
H
50’
7.6 3
H
40’
5
H
25’
7
H
15’
7.8 4
H
40’
6
H
50’
9
H
15’
MAINTENANCE
CALIBARATION
In order to ensure that the pH measurement is correct, the pH sensor should be calibrated regularly using a pH=7 setting solution. In order to
ensure that the calibration is correct, it is essential to observe the expiry date of the calibration solution and store it in a cool place away from
light.
WINTERING
In winter, and if the climatic conditions allow, it is possible to continue treatment while considerably reducing the frequency thereof. An 8- hour
filtration cycle every 15 days is sufficient in most cases. If a tarpaulin or cover is used, the production level should be reduced accordingly. For
the LIMPIDO© DUO to function with cold water (less than 15°C), the salt level must be increased to 5g/l.
ADDING SALT
When the salt level falls below 2.5g/l, it is essential to add more salt to
the pool basin. The use of specially treated salt for swimming pools,
containing stabilisers, is recommended. The electrolyser will be
considerably more effective. At the beginning of the season, we
recommend that you check the salt level and bring it back to 4g/l.
Depending on the level of salt measured, the quantities of salt to be
added are as follows :
POOL V
OLUME M
3
Level
40
50
60
70
80
90
2,5g/l
60
75
90
105
120
135
3g/l
40
50
60
70
80
90
3,5g/l
20
25
30
35
40
45
Salt weight in kg to add for reach 4g/l
7
