Pentair FLECK 3900 NXT - Sodium or Calcium Hypochlorite; Electro Chlorination

Installer Manual Fleck 3900 - NXT - Commissioning
80 / 126 Ref. MKT-IM-015 / B - 08.06.2018
7.2.2. Sodium or calcium hypochlorite
These materials are satisfactory for use with polystyrene resins, synthetic gel zeolite, greensand and
bentonites.
5.25% Sodium hypochlorite
If stronger solutions are used, such as those sold for commercial laundries, adjust the dosage
accordingly.
Dosage
Polystyrene resin: set 1.25 mL fluid per 1 L of resin.
Non-resinous exchangers: set 0.85 mL fluid per 1 L.
Brine tank softeners
Backwash the softener and add the required amount of hypochlorite solution to the well of the brine
tank. The brine tank should have water in it to permit the solution to be carried into the softener.
Proceed with the normal regeneration.
Calcium hypochlorite
Calcium hypochlorite, 70% available chlorine, is available in several forms including tablets and
granules. These solid materials may be used directly without dissolving before use.
Do not let the disinfectant stand for more than 3 hours in the brine tank before the regeneration start.
Dosage
Measure two grains ~ 0.11 mL for 1 L.
Brine tank softeners
Backwash the softener and add the required amount of hypochlorite to the well of the brine tank. The
brine tank should have water in it to permit the chlorine solution to be carried into the softener.
Proceed with the normal regeneration.
7.2.3. Electro chlorination
Valves or systems already equipped with an electrochlorinator device or system will be sanitized
during the brine draw phase.