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Wellis SmartTouch Manual

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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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