Manual Wellis Easy 7 (page 91 of 108) (English)

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SAND FILTER SYSTEM

ACCESSORIES OF THE SAND FILTRATION SYSTEM:

– filter tank

– prefilter circulation engine

– circulation valve

– silica sand, 0.7 - 1.2 particle size

Operational concept: the water is transported by a circulation

engine through a filter housing (which does not contain a fil-

ter cartridge), then it passes through the sand filter. Then the

filtered water flows through the circulation valve and back to

the spa.In this case the circulation valve is set to "filtration".

Upon inspecting the sand filter’s filling you may come across

the following issues.

The sand is white when dry: this points to the presence of

limescale, in which case there are 2 ways to proceed. Chang-

ing the filter sand or applying disinfectant. The sand feels

greasy to touch and forms lumps. Take a handful of sand and

rub it in your palm. If your skin feels greasy, a layer of biofilm

has formed around the sand.The formation of a biofilm layer

is often related to lack of rinsing.The actual filter here is the

silica sand through which the water passes in a downward

flow and the sand filters the particles floating in it.The parti-

cle size of the sand ( 0.7 - 1.2mm) is an important regulation.

Part of the sand filtration system is the circulation valve

which, depending on its position in relation to the tank, can

be a side- or a top valve. The lever on the circulation valve

can be used to switch between functions.The sand filter has

to be backwashed weekly, since pollution can back up in the

sand and obstruct the flow of the water.During backwashing

the water flow in the filter is reversed, so any filtered pollu-

tion will wash down the drain.

We recommend changing the sand filter every 2 - 3 years.

We recommend disinfecting the sand twice every year. This

process involves treating the sand with antialgae chemicals

diluted in water.

LOADING THE SAND FILTER

1. Before loading the sand into the filter put up the filter

tank and fasten the pipe links.

2. Remove the lid and seal.

3. Fill the filter with the required amount of sand.

4. Clean the seal’s nest on the lid.

5. Put the lid on and tighten it.

FUNCTIONS OF THE CIRCULATION VALVE:

– filtration

– backwashing, rinsing

– postwashing, postrinsing

– flushing

– circulation

– locking

INSTALLATION

After filling the sand filtration tank with sand wash the sand

as follows:

1. Set the valve to "RINSE".

2. Open the lockings so that the water flow will not be

obstructed and switch on the pump for 3 minutes.

3. Switch the pump off and set the valve to "FILTRATION".

After you finish these steps the sand filtration system is

ready to filter the spa water.

Attention: operate the valve only when the pump is switched

off.

FILTRATION

While the pump is switched off set the valve to “FILTRATION”.

Switch the pump on.

While the pump is on occasionally check the pressure gauge

to monitor the fullness of the filter. When the pressure reach-

es 1.3 kg/cm2, perform "RINSING".

RINSING

Every load of sand represents thousands of channels meant

to tackle floating particles and keep them within the sand

filter, which means that the channels open to water flow are

gradually reduced in number. Because of this the pressure

within the filter progressively builds up to 1.3 kg/cm2. This

means that the sand filter is not capable of retaining any

more contaminations and cleaning is necessary. Do this as

follows.Switch the valve to “RINSING” while the part leading

to the drain is open and turn the pump on. Any contamina-

tion will flow down the drain.

CIRCULATION

At this setting of the valve the pump moves the water directly

into the spa without it going through the sand filter.

POSTRINSING

After rinsing the filter and after setting the device to "FILTRA-

TION" the water will be turbid for a few seconds. To avoid

mixing the turbid water with the spa water set the valve to

“POSTRINSING”. This should be done as follows. Set the

valve to “AFTER-RINSING” right after “RINSIGN” and switch

the pump on for max. 1 minute. This setting will pump the

filtered water right down the drain.

FLUSHING

If the spa cannot be emptied directly into the drain because

there is no drainage at the level of the bottom of the spa,

flushing can be performed via the filtration pump. To per-

form flushing set the valve to "FLUSHING". While the valve of

the bottom drainage is open, switch the pump on.

Important: ensure that while the pump is switched on the

hair filter and full tubing of the bottom drainage is always full

of water.

CLOSED

The water flow from the sand filter to the pump is closed in

order for the casket of the pump to always be possible to be

opened.

Filtration Postrinsing

Rinsing Flushing

Circulation Closed

OPTIONAL ACCESSORIES  SAND FILTER SYSTEM

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Wellis Easy 7 User Manual - German - 124 pages

Wellis Easy 7 User Manual - Dutch - 113 pages

Wellis Easy 7 User Manual - French - 108 pages

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Wellis Easy 7 Manual

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