Operation - Kärcher NT 75/1 Me Ec H Z22 Handbuch

 Insert the suction hose into the suction
hose connection.
 Check the fill level in the dirt container
prior to starting work and empty the
container if necessary.
 Insert desired accessories.
Automatic monitoring of suction
capacity
The machine is equipped with a suction
power monitor. The control lamp "Vacuum
pressure" lights up red if the air speed in the
suction hose falls below 20 m/s (see "As-
sistance in case of malfunctions").
Note: The control lamp can light up occa-
sionally during normal operation (e.g.,
while working with a floor nozzle), if the air
volume comes down (cross-sectional re-
duction) causing a low pressure.
Note: There is no defect in this case; only
an indication that, as specified above, the
air volume has reduced and the low pres-
sure has increased.
Anti-static system
Static charge is deflected by providing
earthing to the connection nozzles. This
way, the electrically conductive accesso-
ries approved by the manufacturer prevent
the formation of sparks and current surges.

Operation

Dry vacuum cleaning
The appliance is equipped with a paper
–
filter bag fitted with locking lid.
Order No. Safety filter sack: 6.904-
420.0 (5 pieces)
Note: You can use this appliance to take up
all types of dust up to dust class H. It is stat-
utorily necessary to use a dust collection
bag (see Filter systems for order number).
Note: As an industrial vacuum cleaner the
appliance is suitable for vacuuming up dry,
combustible dusts with MAK values.
Unused flat-fold filters may only be
–
stored and transported in the packaging
(carton).
Illustration
The lamella of the flat-fold filter should
–
not be touched during installation.
Warning
The flat-fold filter and the safety filter sack
must never be removed during the dust ex-
traction process.
Installing the safety filter bag
 Release and remove the suction head.
Illustration
 Insert the safety filter sack.
Illustration
 Pull the safety filter sack over the con-
tainer.
 Insert and lock the suction head.
Wet vacuum cleaning
Danger
No dusts hazardous to health should be
sucked in during wet vacuuming.
To suck wet dirt, always remove the
–
safety filter bag.
Inserting the rubber lips
Illustration
 Remove the brush strips.
 Install the rubber lips.
Note: The structured side of the rubber lips
must point outwards.
Close the suction connection
Illustration
 Properly insert the connection socket in
the suction connection.
 Push in the connection socket until it
locks into place.
 Turn the suction connection with the
connection socket to the right to close it
tightly.
Note: The accurate fit is ensured by means
of a "bayonet connection".
Removing the safety filter sack
 Release and remove the suction head.
Illustration
 Pull over the safety filter sack.
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EN 21