Miele DA 270-4 Operating And Installation Instructions page 11

If the power level indicators "1" and "4"
flash, the automatic switch back is not
activated.
^ To activate the automatic switch back
press the "+" button.
The power level indicators "1" and "4"
light continuously.
^ To deactivate press the "–" button.
^ To save the setting press the "Delay
Shut Down" button.
If the procedure is not stored within
4 minutes of programming, the hood
will automatically default to the "old"
data.
Fan performance
The maximum air flow capacity is
625 cfm. Factors such as narrow duct
diameter and bends will affect this
value.
Level 1 operates at 40% capacity
Level 2 operates at 60% capacity
Level 3 operates at 80% capacity
Level 4 operates at 100% capacity
Operation
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