amiad Spin Klin Nova Angle, Инструкция по установке, эксплуатации и обслуживанию

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Installation & Operation Manual Spin Klin™ Nova 910101-001009 | 01.2021 73
10. Disc Cleaning Procedure
10.1. Seasonal Maintenance - Discs
To guarantee thorough cleaning the following steps should be taken
:
Attention:
When carrying out any of the following seasonal maintenance, service, or cleaning the discs –
after backwashing the system and after closing the water inlet, make sure that there is no
pressure in the system!
10.2. Cleaning recommendations for clogged filtration discs
Water-formed deposits may cause clogging of the filter discs. The formation of these deposits
depends on the quality of the filtered water and environmental conditions like temperature,
pH, light, duration of filtration and more.
Common water-formed deposits are:
•
Biological or organic deposits (mostly mucous or oily to the touch, beige,
brown or green in color)
•
Iron oxide (rust) or other metal oxides (brown or orange deposits)
•
Manganese oxides (black deposits)
•
Carbonates (white or gray deposit)
•
Combinations of the above
If these deposits cannot be eliminated by pretreatment of the water, we recommend the
following cleaning procedure:
10.3. Materials and Equipment
•
A well-ventilated working place.
•
1 small container (1 liter), 2 large containers (50 liter) and a stirring stick, all
resistant to chemicals, preferably of polypropylene.
•
Plastic rope to tie up the disc.
•
Sodium Hypochlorite , NaOCl, CAS No. 7681-52-9
▪
Strong oxidizing liquid, commercial concentration: 10%.
▪
Oxidizes and removes organic and biological deposits.
•
Hydrogen Peroxide , H2O2, CAS No. 7722-84-1
▪
Strong oxidizing liquid, commercial concentration: 16%
(35%). Oxidizes and removes organic and biological deposits.
•
Hydrochloric Acid , HCl, – CAS No. 7647-01-0
▪
Very corrosive liquid, commercial concentration: 30%.
▪
Dissolves and removes carbonates, iron oxide, and other
deposits.
•
Citric Acid , C6H8O7, CAS No. 77-92-9
▪
Organic acid, commercially available as solid white crystal
salt.
▪
Dissolves and removes manganese compounds.
•
Safety equipment: safety glasses, gloves, long pants, long-sleeved shirt and
shoes.