JetCat EZ-Fuelstation, Инструкция по эксплуатации

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A1) Connection diagram for refueling a "normal" tank system without EZ-Fueler filling valve
This results in the following filling cycle:
Fuel is first filled into the hopper tank from the blue filling hose.
If this is full, the fuel flows into the subsequent tanks until they are also full.
At this moment, the fuel then flows into the fuel overflow (or the tank vent hose). The fuel flows back
into the filling station and from there into the fuel container via the flowback line, which is additionally
connected to the model fuel overflow

a closed circuit.
The fuel flowing back via the overflow line is recognized by the detector in the fuel station and used to
terminate the refueling process as soon as "bubble-free" fuel is detected in the flowback line.