Astralpool 46888A Manuel D'installation page 8

FILTRATION
With the pump switched off, place the handle of the selector valve in the FILTERING position.
Switch on the pump.
During this operation, it is advisable to observe the pressure gauge from
time to time as this indicates the degree of saturation of the filter. When
the pressure reaches 18.5 PSI a "BACKWASH" should be carried out.
The main drain and skimmer valves will be regulated according to the
quantity of floating material found on the surface of the water. Bear in
mind that with the main drain valve fully open there will be little suction
from the skimmers. If the surface sweep of the skimmers is to be
stronger, reduce the flow from the main drain.
0,8 kg/cm² - 11,4 PSI: Normal pressure at
the beginning of a filtering cycle.
BACKWASH
Each load of sand forms thousands of channels which pick up all the mate-
rial contained and caught up in the filtering process, the number of free
channels allowing the water to pass is continually decreasing. This is why
the pressure rises progressively until it reaches 1,3 Kgs/cm². At this pres-
sure the filtering sand is unable to collect any more impurities and must be
cleaned as follows:
Turn the selector valve to the "BACKWASH" position and with the main
drain and return valves open, switch on the pump and run it for 2 minutes.
When this operation is completed, the dirt blocking the filter will have been
removed.
1,3 kg/cm² - 18,5 PSI: This pressure indi-
cates that it is necessary to "BACKWASH".
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FILTER
FILTRATION
FILTRACION
FILTRAZIONE
FILTERN