Pentair FLECK 3150 NXT Installer Manual page 125

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.
Ref. MKT-IM-010 / C - 18.10.2019
Installer manual Fleck 3150 NXT/NXT2 - Commissioning
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