Saeco SE-50 Operation And Maintenance page 37

10.2.9.1 Steam circuit descaling
Press the "Clean" button to enter the "CLEAN" menu.
Navigate through the "CLEAN" menu using the "Clean"
button and select "ST CLEAN".
Press the "Programming" button to confirm.
Remove the water tank, pour 500 ml of Saeco descaling
solution in it and fill with fresh water up to the level
indicated by MAX.
Press the "Programming" button to confirm.
Turn the steam knob counter-clockwise and let the
machine dispense steam until the end of the procedure.
The machine stops automatically.
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