Miele S 4000 - Manual (Page 25)

Opening the air inlet valve
(not available in models with radio
handpiece)
The air inlet valve is designed to
provide a quick, convenient reduction
of suction power, e.g. when moving
from a carpet to an area rug.
^ Open the air inlet valve far enough to
reduce the power.
Opening the air inlet valve reduces the
power to the tool being used.
Operation
25