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UDI 5-3-2020
Maintenance Manual - 6Matic
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3 - Operating principle
A. Filtration mode
The raw water enters the filter inlet and passes through the coarse screen (1), the first stage of filtration.
This prevents passage of any large particles, which may damage the filter internals.
The water then flows through the inside of the filter to the inner side of the fine screen (2). The water
passes through the screen from inside out to the filtered water chamber (8) and flows out through the
outlet.
As the water passes through the fine screen, the solids accumulate creating a cake of dirt on the inner
surface of the screen; as a result the pressure drop across the screen increases, and when it
reaches a preset level (0.5 bar / 7.5 psi) the filter controller activates the self cleaning process.
B. Flushing mode
When flushing command is activated, the controller activates the flushing valve (6) and the gear motor
(5).
The pressure differential between the pressure inside the filter and at the open valve to the atmosphere
on the flushing chamber (4) creates a backflow effect at the unique SA nozzles (3), removing
accumulated solids from the screen to the drain.
The unique design of the SA nozzles achieves an increased suction and significantly decreasing the
water consumption during flushing, due to accurate contact point between the unique SA nozzle and
the screen.
The spiral motion of the nozzles cleans all the area of the screen.
The collector assembly is driven by electrical motor which rotates in one direction. The electrical motor
is connected through the collector (7) to a reversing mechanism (9) which enables a continuous linear
movement (back and forth) of the collector assembly.
