GRE KWOV436, Instruction Manual, Page: 52 / 64

52
Sand Filter
This is the oldest of filtering systems.
The filtered water passes through the sand (calibrated silicon) that retains all impurities.
This type of filter is equipped with a multi-directional flap that allows easy manipulations and cleaning.
DIFFERENT POSITIONS OF THE MULTI-DIRECTIONAL FLAP (4 OR 6)*:
When you perform changes the position of the multi-directional flap that pump should always be stopped, without risking seriously
damaging the filter and cancelling the guarantee.
1. FILTERING POSITION (OR FILTER):
Usual position of the flap that allows the water coming from the pump to enter through the upper part of the filter and circulate
through the sane, where all its impurities are trapped.
The water is collected in the mesh at the bottom and returned to the pool.
The pressure gauge situated at the upper part of the filter allows controlling the pressure.
In the case that the pressure increase 0.2 bar regarding the starting pressure, you will need to clean the filter.
2. WASHING POSITION (OR BACKWASH):
Sand washing position. Allow the water to circulate in reverse direction in the filter. The water enters through the lower part of
the filter elevates the filtering mass and therefore collects all its impurities and because they are lighter than sand, they area
evacuated through the upper part of the filter towards the drain. This operation should last between 2 and 3 minutes.
3. RINSE POSITION / DRAINING OF THE FILER** (OR RINSE):
Operation that follows washing the filter. When you have cleaned the filter, you should rinse and re-compress the filtering mass. In
this position the water circulates through the filter as in the filtering position but is evacuated through the drain at the filter outlet.
This operation should be performed between 20 and 30 seconds.
Desagüe
Impulsión
ÉGO
UT
FE
RM
É
RECIR
CUL
ATIO
N
LA
VA
GE
R
IN
CA
GE
FILRATION
ÉGO
UT
FE
RM
É
RECIR
CUL
ATIO
N
LA
VA
GE
R
IN
CA
GE
FILRATION
ÉGO
UT
FE
RM
É
RECIR
CUL
ATIO
N
LA
VA
GE
R
IN
CA
GE
FILRATION
Skimmer
Skimmer
Skimmer