Rivulis F2400 - Initial Backwash Procedure

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Rivulis F2400 Media Filter
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A backwash cycle will be performed according to one of the following situations (whichever
comes first):
1. Initiated by the timer function of the controller. The operator programs the controller to set
the time between one backwash to the next one (see Annex: “Programming the Controller")
2. Initiated by the pressure differential between inlet manifold and outlet manifold of the
system. The typical setting is 0.5bar (7.5 psi).
3. Manually – by pressing push button on the controller display
4.1. The Initial Backwash
The initial backwash should be executed after filling the tanks with media, linking the controller
and connecting the array to its water source.
The objective of the initial backwash cycle is to wash out the dust, fine dirt from the media
layer, and other tiny particles, as well as verifying the whole array’s appropriate operation and
functioning.
This process should be repeated a few times until clear water comes out of the backwash
outlet.
4.1.1. Performing the Initial Backwash Automatically
1.Turn on the controller.
2. Before opening the water entry valve to the filtering array, verify that the main valve is
closed.
3.Open the inlet valve to the filter array.
4.Press the manual start button on the controller, the system will start the automatic
backwash process.
Although the backwash function will be managed by the controller during normal operation, it
is usually recommended to perform a manual initial backwash (indications given below), as
the duration of each filter’s backwash will be determined by observing the backwash water as
explained before.
NOTE: It is important to ensure that media is not lost during backwash process; look at the
drain pipe of the backwash outlet to verify that media is not lost during backwash).
4.1.2. Performing the Initial Backwash Manually
1. Before opening the water entry valve of the array, verify that the exit valve is
close.
2. Turn the three way valve to open position of the array’s first filter (see image
6).The filter should be now flushing.