Operating Modes; System Stand-By - Kärcher HDS 891 ST Manual Del Usuario

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4. Operating Modes

COLD-WATER mode
Switch on water supply
Press lever on hand gun, and turn main
switch (A) to "Motor ON".
"Motor ON" symbol
Indicator light "ready for working" (F) shows
that the system can now be operated.
HOT-WATER mode
The burner can be switched on whenever
required.
Caution!
Hot water mode without fuel will damage
the fuel pump. Before using hot water mode,
ensure that the fuel is supply is functioning.
This is achieved by turning main switch (A)
-
+
one step further to "Burner ON".
"Burner ON" symbol
The required water temperature is set by
adjusting temperature regulator (B). The
maximum temperature is 98 °C.
Adjusting operating pressure and flow rate
a. Adjustment on the unit
B3
B. Operating Data
Screwing in the control spindle increases the
flow rate and operating pressure
Screwing out the control spindle reduces the
flow rate and operating pressure
b. With servopress handgun (optional)
Clockwise rotation of the control sleeve
increases the flow rate and operating
pressure
Anti-clockwise rotation of the control sleeve
reduces the flow rate and operating pressure
Steam mode
In order to convert from hot-water to steam
mode, the unit must be run until it is cold and
then switched off. Conversion is carried out as
follows:
Replace high-pressure nozzle with steam
nozzle.
Set temperature regulator to 150 °C.
Set flow control knob on high-pressure pump
for minimum water flow (turn anti-clockwise).

5. System Stand-by

If the hand gun lever is released while the
system is operating, the unit switches off.
HDS 891 / 1291 ST
5.959-742 A 2009651 (11/04)