geberit HS01 Manual De Operación página 38

Checking the set flush volume
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EN
Press the <TEST> button for 1 second.
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✓
The flush volume can be determined as follows:
Flush volume =
solenoid valve opening time • flush performance
The flush performance is 3 l/min.
The solenoid valve opens and water begins
to flow.
The solenoid valve closes automatically once
the set flush volume has been reached.