Bedienungsanleitung Intex Purespa Jet And Bubble Deluxe SC-20N (Seite 24 von 34) (Englisch)

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(344NL) SPA (JET + BUBBLE) ENGLISH 7.5” X 10.3” PANTONE 295U 08/09/2019

English

Page 24

Particular care should be taken with chemical treatment of the water with special attention to disinfectant

limits and control of pH values. The use of ozone or UV, where applicable, shall always be accompanied by

residual disinfection with an oxidising biocide (e.g. Chlorine or Bromine or other biocide products, compatible

with manufacturer’s recommendations).

Improper use of chemicals may result in degradation, damage and other imperfections of the spa surface

and other spa components (typically discolouration of materials, corrosion of metal parts).

Free chlorine: is the chlorine residual present in the spa water.

Result if too low – Inadequate level of disinfection.

Result if too high – cause odor problem, skin & eye irritation, corroded metals and other materials.

pH: a value that indicates how acidic or basic the spa water is.

Result if too low – Corroded metals, eye & skin irritation, and destruction of total alkalinity.

Result if too high – Scale formation, cloudy water, shorter ﬁ lter/heater runs, eye & skin irritation, poor

chlorine efﬁ ciency.

Total Alkalinity (TA): indicates the degree of the water’s resistance to pH change. It determines the speed

and ease of pH change, so always adjust total alkalinity before adjusting the pH level.

Result if too low – Corroded metals, eye & skin irritation. Low alkalinity will cause the pH to be unstable.

Result if too high – Scale formation, cloudy water, shorter ﬁ lter/heater runs, eye & skin irritation, high

chlorine demand.

Calcium Hardness (CaCO3): refers to the amount of calcium and magnesium dissolved in the water.

Result if too low – Difﬁ culty balancing water, corrosion of metal components, eye & skin irritation and water

foaming.

Result if too high – Scale formation, cloudy water, eye & skin irritation, difﬁ culty balancing water and ﬁ lter/

heater inefﬁ ciency.

Saturation Index (SI): temperature, calcium hardness concentration, total alkalinity and pH represent the

main factors inﬂ uencing scale formation. The tendency of water to either form scale or corrode is indicated

by the Saturation Index (SI): SI = pH+TF+CF+AF-12.1

*Where: TF = Temperature Factor; CF = Calcium Hardness Factor; AF = Total Alkalinity Factor

SPA WATER CHEMISTRY AND BALANCE (continued)

Water Temperature TF Calcium

Hardness (ppm) CF Total

Alkalinity (ppm) AF

(ºC) (ºF)

8 46 0.2 75 1.5 50 1.7

12 54 0.3 100 1.6 75 1.9

16 61 0.4 150 1.8 100 2.0

19 66 0.5 200 1.9 150 2.2

24 75 0.6 250 2.0 200 2.3

29 84 0.7 300 2.1 300 2.5

34 93 0.8 400 2.2 400 2.6

40 104 0.9 500 2.3 -- --

Test the water pH, Temperature, Calcium Hardness and Total Alkalinity levels. Use the equivalent Factors

in the SI equation.

SI = 0, Balance

If SI > 0, Scaling or cloudy water condition.

If SI < 0, Corrosive to metals or eye & skin irritating condition.

The SI is considered satisfactory if the value is within -0.3 to +0.3 range. Zero being perfect.

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