Electra DELTA 21ST Instrukcja Instalacji Pobierz pdf (Strona 5)

0.0 Forward: The Elektra

Pro UV Unit is designed for use in swimming pools, fountains, water features,

waterfalls and fish ponds. It is not designed for use in potable (drinking) water installations. Use of this

product in applications other than those indicated above will void your warranty and could be harmful to

your health or the health of others.

1.0 Introduction - How The Elektra

Pro UV Unit Works: Within the Electra

Pro UV Unit (which we will refer to

throughout this manual as EP), a high intensity electrically operated Ultraviolet (UV) bulb is located inside the unit’s

wet chamber. This UV bulb gives off Ultraviolet light wave emissions when lit. The bulb’s operating emission range is

within the Ultraviolet light wave spectrum at 253.7 nm of wavelength. This wavelength is such that when bacteria,

protozoa, viruses, algae spores, or other single celled waterborne microorganisms in the incoming water flow are

exposed to the light waves of the UV bulb for one second or more exposure time, the DNA of the microorganism is

altered or disrupted, which controls and eradicates these unwanted contaminates and renders them harmless.

Pond or pool water containing these unwanted contaminates enters the EP unit’s wet chamber and is exposed to the

light rays generated by the UV bulb. The EP unit has been designed to allow for some turbidity in the water, as

turbidity will reduce the UV light wave transmission capability. Therefore, all EP units are sized with sufficient exposure

time to allow for possible turbidity in the water and the reduction in the killing power of the UV bulb when it nears the

end of its useful life. When the incoming water is exposed for this duration, the water exiting the unit is near drinking

water biological quality. CAUTION!: THIS UNIT IS FOR POND OR POOL USE ONLY.

DO NOT USE THIS UNIT FOR

POTABLE (DRINKING) WATER SANITIZATION.

2.0 Pre-Installation - In order to ensure that your EP unit functions with the proper exposure time to achieve the

desired water sanitization, it is important to provide the proper water flow rate through the EP unit. If water passes

through the unit too quickly, the exposure time of the microorganisms to the UV bulb produced rays will not be

sufficient to obtain the desired kill rate. The water flow rate through the UV unit is governed by the piping of your pool

or pond and the size and output of your circulation pump. There also needs to be consideration to the application for

the UV unit. Fish ponds have different requirements than do swimming pools, water features, fountains, or waterfalls.

2.1 Pond Turnover Rates - Most fish pond experts agree that there is no set formula for the sizing of

circulation pumps and UV systems for ponds. The size of the pond, the depth, plant coverage, the amount of

sun exposure or shade, and the number of fish in the pond all contribute to determining what the flow rate for

a pond should be. The best advise is to consult with a pond expert to determine what the flow rate for your

pond should be. This is the best method of ensuring that your pond is being circulated properly. But absent

of that, a general rule of thumb that can be used for ponds is that the water volume of the pond should be

passed through the filter system every two hours or so. Thus, if you take the volume of your pond (in gallons),

and divide that by 120 (the number of minutes in two hours) you will have an approximate desired flow rate for

your pond. Then, you select a pump and filter system that works properly at that flow rate. As an example, a

6000 gallon pond would have a desired flow rate of 50 gallons per minute (GPM) calculated at 6000 /120 = 50.

2.2 Swimming Pool Turnover Rates - Swimming pools are somewhat simpler to calculate for flow rates.

Most residential pools are designed to have the capacity of the pool turned over every 12 hours. Semi-

commercial pools are normally designed for an 8 hour turnover flow rate. Check with your local jurisdiction for

the required flow rate for your type of pool to be sure. Thus, as an example, using the same formula as above,

a 20,000 gallon residential pool will need to have a pump capable of a 28 GPM flow rate and a 25,000 gallon

Semi-commercial pool will need to have a pump capable of 52 GPM.

Like pools and ponds, the EP unit needs to be properly sized by flow rate. Moving the water through the EP

unit’s wet chamber too fast will not allow enough exposure time of the water to be exposed to the UV bulb rays

for the two second minimum required. The chart below shows the desired and maximum flow rates for your

EP unit. Make sure the flow rate of your circulation system pump does not exceed the maximum allowable

flow rate of the UV unit you have selected. (Consult your dealer or pump manufacturer for the pump’s GPM

rating if you are in doubt). If the pump output exceeds the maximum flow rate of the EP unit you have

selected, select an EP model with a higher flow rate capacity rating or consider a multiple unit installation.

(See Sec.17.7).

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