[Steff]

Riporto la didascalia alle figure 17 e 18:

"Push the start button on the motor head repeatedly
and in quick succession with the palm of your hand
until the Tetratec® EX Filter starts pumping water.
Water will be siphoned through the water intake
hose and directed into the filter case. It will stop
siphoning water once the water in the flow return
pipe reaches the water surface level of the tank."

e quindi quella della figura 19:

"Plug in the Tetratec® EX Filter. Once the power is on, water will flow
fully along the flow return pipe.
Note: At this point check all components for leakage. After
operating the Tetratec® EX Filter for 30 to 60 min check that
the filter is operating properly and recheck for leakage."

Nella tabella per la soluzione dei problemi (ovviamente la grafica è diversa) tra le varie soluzioni proposte al problema:

"Abnormal sound emitted when operating the filter"

viene indicato: "The top of the motor is at the same level or higher than that of the water surface: Ensure that the top of the motor is at least 10cm below water level (see recommendations)"