Sodium Or Calcium Hypochlorite; Electro Chlorination - Pentair FLECK 2750 NXT Installer Manual

Installer manual Fleck 2750 NXT/NXT2 - Commissioning
Depending on the conditions of use, the softener type, the type of ion exchanger and the
disinfectant available, a choice can be made among the following methods.
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.
126 / 170 Ref. MKT-IM-026 / C - 15.12.2020