15
4. USE
4.1 Memo
Carefully check the quality of the water in your
swimming pool. Carry out the recommended
manual analyses on a regular basis.
Every time the device is used, carry out
the following analyses:
Analyses
to be
carried
out
Ideal level
pH
6.9 to 7.4
Active
chlorine
0.3 mg/l (ppm)
Salt
5 g/l or 5 kg/m 3
Stabiliser
30 to 50 mg/l (ppm) max.
if redox 25 ppm max
Operate the filtration system during the day
rather than at night. The proliferation of
micro-organisms occurs during the day.
Water
temperature
Daily filtration time
< 10 °C
1 to 3 hours
10 to 25 °C
5 to 8 hours
20 to 25 °C
12 hours
25 to 30 °C
18 hours
> 30 °C
24 hours
Warning, for temperatures below 15 °C,
STERILOR Duo must be stopped.
Wash the filter regularly (approximately once
a week).
4.1.1 pH
The pH of the water must be maintained
between 6.9 and 7.4.
The pH of the water in a swimming
pool varies naturally and continuously, but
always keeps the same trend over time.
4.1.2 Chlorine
The ideal active chlorine level is around 0.3 to
0.4 mg/l (ppm) as soon as the water
temperature reaches approximately 15 to 20
°C.
Whenever the device is used with
water that does not contain chlorine, carry out
manual chlorination. For 100 m3 of water, 300
g per day for 8 days.
4.1.3 Salt
The salt level must be 5 g/l or 5 kg/m3.
The salt level should be analysed at the
beginning and in the middle of each season. A
salt analysis kit is supplied with the device.
The salt analysis strips are sensitive to
humidity and have an expiry date written on
the box. Add salt if this concentration is below
5 g/l.
Calculating the amount of salt to put in
the swimming pool
:
Weight of salt to be added in Kg = (5 –
concentration of salt measured in g/l) x
Swimming pool volume in m3
Example: The analysis detects 3 g/l level of salt
in the pool water, which is 80 m3, instead of
the recommended 5g/l;
You need to add: (5g/l ideal level - 3g/l
analysed level = 2 g/l to be added) i.e. 2 kg per
m3. Therefore, you need to add 80 m3 x 2
kg/m3 = 160 kg
Adding salt: If you use conventional salt (salt
for softener, not cooking or road salt), you can
add the stabiliser manually. But be careful,
never exceed 60 mg per litre of stabiliser in
the water. Above this concentration, the
chlorine is consumed by the stabiliser and in
this case you need to empty the swimming
Summary of Contents for STERILOR Duo
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