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8.
Cleaning
The sensor is equipped with built- in flushing nozzles. The nozzles are used to direct the
cleaning liquid or air through a ¼ ” hose that is connected to the top of the sensor
housing. A solenoid valve that is wired to an alarm relay in the BB2 control box
controls the air or liquid. Water is recommended for flushing in aeration basins.
Compressed air is recommended for most other applications.
Flushing tube
Water
Flushing must be activated in the “Settings” menu in the BB2 control box:
•
Select the ITX transmitter in the Main Menu by using the
or
buttons.
•
Press ENTER for approximately five seconds to enter the Transmitter Menu.
•
Use the arrows to select “Settings” and press ENTER.
•
Use the arrows to select “Cleaning” and press ENTER.
•
In the “Cleaning” submenu, adjust the “Cleaner” setting to “flush” and specify
the cleaning interval in minutes and the flush time in seconds.
•
Specify the relay to be used according to the wiring inside the control box. For
example, if the solenoid is wired to relay #1, select “#1” for flushing.
•
“Next time” displays the next time flush will be activated, pushing ENTER will
set it to current time and those start cleaning..
NOTE!
Pay attention to the requirements for protection against backflow, according to
the EN 1717 standard for drinking water devices. If possible, use plant reuse water or
effluent water for cleaning.
Cleaning the Flushing Nozzle
The flushing nozzle and sensor cannot be disassembled in the field. An attempt to
disassemble will void the warranty. If the flushing nozzle becomes plugged, it can
usually be cleaned by backflushing it with clean water. Before attempting to backflush,
close the valve for the flush water source and disconnect the sensors flushing hose from
the solenoid valve. Then, place a ½ ” hose over the flush nozzle and carefully open the
water valve. The pressure should clear the line of solids. If backflushing does not work
initially, try cleaning the three flushing nozzles with a needle. Try backflushing the
nozzles again as described above until clean water comes out at the solenoid valve end
of the hose.