Swimming Pool Theory

SWIMMING POOL THEORY

INDEX

o Swimming pools categories

o Swimming pool maintenance

o Pools Water Treatments

o Chemicals dosing and control

o Dosing plants installation: examples

o Recommended dosing systems

SWIMMING POOLS CATEGORIES

There are 3 different types of swimming pools :

• public• semipublic• private

All can be either outdoor or indoor.

Private

Semipublic (hotel)

Public

Indo

or p

ools

Out

door

poo

ls

SWIMMING POOLS CATEGORIES

A swimming pool is an easy-to-monitor system, because it is such a "closed ring". Apart from make-up water replenishments, made to recover the amounts lost forcibly (evaporation) or deliberately (to lower the level of impurities), water circulation occurs up to 6 times in 24 hours, keeping parameters to the standard levels. A swimming pool represents also the example of a complex system in which the pollution degree is frequently changing.Due to the «elements» that, in a short period of time, enter and exit it.. (example: children during a swimming lesson ).

SWIMMING POOL MAINTENANCE

Water is one of the most common means by which bacteria and viruses transmission happens. This risk becomes more relevant in public places, swimming pools in particular, due to people presence.For this reason, in a swimming pool water has to be continuously under control, in order to guarantee respect for the standard level of the most important parameters:o PHo Cloroo Redox (ORP)The swimming pool dosing system is connected to the recirculation pump. The hydraulic circulation should be continuous, starting from a minimum of 3 cycles per day.


Recirculation timing should be:

Swimming pool category Recirculation maximum times

Private 8 hours

Semipublic (Hotel) 6 hours

Public 4 hours


Swimming pool fundamental controls are:

o pHMeasurement of the hydrogen ions concentration (H+)pH range: 0 <— acid —> 7 <— alkaline —> 14

o Chlorine Concentration Reading is done with the amperometric cell (ions reading)It can be carried out also with a colorimeter

o Redox Potential (alternative to Chlorine concentration)ORP (mV) measurement Chlorine concentration is proportional to the Redox potential.


Na+ + CLO- (Sodium Hypochlorite)

In this case, Chlorine concentration is proportional to Oxygen concentration and to Redox potential: chlorine concentration can be measured by Redox potential.

EXAMPLE

o There are different kinds of swimming pool water treatments.o Here below, we listed the most common:

SWIMMING POOLS CATEGORIESTREATMENT PUBLIC SEMIPUBLIC

(HOTEL)PRIVATE

Filtration yes yes yes

Coagulant Dosing yes optional no

PH Control yes yes yesRedox control for

free chlorine adjustment

Not recommended

Alternative method

yes

Chlorine Control yes yes raramenteRedox Alarm

(Water quality status)

yes … …

POOLS WATER TREATMENTS

PARAMETERSTemp. pH Redox

(ORP)Torbidity Free

ChlorineCombined Chlorine

Cynuric Acid

Flocculation

Standard

RANGE

18÷38 °C

6,5÷8,5 ≥670 mV ≤8 NTU/FTU 0,7÷1,8 ppm

≤0,5 ppm ≤75 ppm

≤0,2 ppm (Fe or AL)

CHEMICALS DOSING AND CONTROL

pH Control

Acid = Hydrochlorid Acid (HCl) or Sulphuric Acid (H2SO4)PH-Minus is its commercial name Liquid Product. It is possible to decrease pH value in the pool..

Alkaline = Soda (NaOH)PH-Plus is its commercial name Liquid Product. It is possible to increase pH value in the pool.


Chlorine Control

o SODIUM HYPOCHLORITE (NACLO)Liquid Product. Chlorine concentration is measured by Amperometric Cell or Redox instrument.

o CALCIUM HYPOCHLORITE (CA(CLO)2)Powder product. Chlorine concentration is measured by Redox instrument or Amperometric Cell. The product must to be diluted for dosing with our pumps.


CHLORINATED ISOCYANURATESProduct powder, Chlorine concentration is measured by Amperometric Cell.The product must to be diluted for dosing with our pumps.

SALT CHLORINATOR UNITIt produces Free Chlorine through salt diluted in water. Chlorine concentration is measured by Redox instrument or Amperometric Cell.


CHLORINE DIOXIDE (CLO2)Gaseus Product. Chlorine concentration is measured by Amperometric Cell.Dosing with our products is not possible.

Chlorine alternative control

OZONE (O3)Gaseus Product. Concentration is measured by Redox instrument, but only in a gas pipeline. Dosing with our products is not possible. UV SYSTEMIt sterilizes water through ultraviolet rays gamma Uv-c, without chemical product.


HYDROGEN PEROXIDE (H2O2)Liquid product that destroys viruses through Oxygen. Concentration measurement by Oxygen sensor with Nexus Series controller and timed dosing with Elite ph/o2 system are both possible.

Secondary Controls

FLOCCULATION PRODUCTLiquid product. Volumetric Pump. This product reduces torbidity. ANTI-ALGAE PRODUCTLiquid product. Dosed weekly by the pump. It reduces the plant organism.


DOSING PLANTS INSTALLATION

There are two different construction methods of a swimming pool:

• With compensation basin• Withouth compensation basin

SWIMMING POOL WITH COMPENSATION BASIN

Pompa Flocculante

COMPENSATION BASIN

Anti -algae injection

Recirculation pump

FilterCorrect point to measure chlorine and ph values

CL PUMP INJECTION

PH PUMP INJECTION

SWIMMING POOL WITHOUTH COMPENSATION BASIN

Skimmer

Anti-Algae injection

Ricirculation pump

Filter

Correcto pint to measure Chlorine and Ph measure

Cl Pump injection

Ph Pump injection

Floculant pump

Depending on the characteristics of the pool, different dosing systems are recommended.

ELITE.ph/Rx SERIES

RECOMMENDED DOSING SYSTEMS

ELITE.PR SERIES


HELIOS.01 SERIES


HELIOS.05 AMPEROMETRIC SERIES


BIO.TEMP SERIES


ATHENA.PR SERIES


STERIL.PANEL 01 SERIES


Swimming Pool Theory

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