C.P.A. White Pool 490 Assembly And Maintenance Manual page 35

SAND FILTER INSTRUCTION MANUAL
The monobloc must not be used without water. The water ensures the cooling. The substitution guarantee does not apply in the
case of use without water.
Before changing the position of the selector valve, STOP the filtration pump.
Multi-way control valve operation
The control valve is used to select the 6 different filter functions: filter, rinse, recirculate, backwash, closed and open.
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Filter. This function is used for filtering the pool water: it is the most used position. The water
is pumped through the sand filter, where it is cleaned and sent back to the pool.
Backwash. This function is used to clean the sand bed: the water is pumped down through the
intake manifold, pushed upwards through the sand bed and, finally, expelled outside the door
D.
Rinse. This function is used for initial start-up, cleaning and leveling of the sand bed after
backwashing - water is pumped down through the sand bed, pushed up through the intake
manifold and ejected outside the exhaust port of the valve.
Recirculate. This function allows the circulation of the pool water without the use of the sand
filter: it can be used when the filter is broken or for treatments of the pool water with specific
chemicals for the treatment of the pool water.
Waste. This function allows the water to flow out of the pool without the use of the filter: the
water is in fact pumped outside the drain door rather than sent back to the pool. For the pump
to suck it is necessary to keep the basket and all the bottom drain piping full of water.
NOTE: before starting the drain, make sure that the valves of the skimmers and the sludge
suction vents are closed.
Closed. This function stops the flow of water between the sand filter and the pool.
WARNING
pag. 6 di 8
Rev.01–26/04/21