Operating instructions

– 5
 Set appliance switch to desired operating mode.
Indicator lamp for operational readiness lights up.
The device starts briefly and turns off, as soon as the
working pressure is reached.
– HDS 3.5, 4.0, 4.5 only:
Note: If the indicator lamps for pump, burner mal-
function or engine are on during operation, turn off
the appliance immediately and repair malfunction,
refer to "Help with malfunctions".
– HDS 5.0 only:
Note: If the indicator lamps for pump, rotation di-
rection, burner malfunction or engine are on during
operation, turn off the appliance immediately and
repair malfunction, refer to "Help with malfunc-
tions".
 Release the trigger gun. To do so, push the safety
catch towards the back.
When activating the hand spray gun the device switch-
es back on.
Note: If no water comes out of the high pressure nozzle,
vent pump. Refer to "Help with malfunctions - appliance
is not building up pressure".
 Set temperature regulator to desired temperature.
86 °F/30 °C to 208 °F/98 °C:
– Clean with hot water.
212 °F/100 °C to 302 °F/150 °C
– Clean using steam.

 In steam operation (> 100°C), use the steam noz-
zle available as an accessory (see “Steam opera-
tion”).
 Turn the regulation spindle in a clockwise direction:
Increase working pressure (MAX).
 Turn the regulation spindle in an anti-clockwise di-
rection: Reduce working pressure (MIN).
– For considerate treatment of the environment use
detergent economically.
– The detergent must be suitable for the surface to
be cleaned.
 With support of the detergent dose valve set deter-
gent concentration as determined by the manufac-
turer.
Note: Recommended values at the control panel at
maximum working pressure.
 Set pressure/temperature and detergent concen-
tration according to the surface to be cleaned.
Note: To prevent damage due to too much pressure, al-
ways position high pressure ray first from a greater dis-
tance towards object to be cleaned.
– Loosen the dirt:
 Spray detergent economically and let it work for
1...5 minutes but do not let it dry up.
– Remove the dirt:
 Spray off loosened dirt with the high pressure jet.
Removal of light contaminations and clear rinse, i.e.:
Gardening tools, terrace, tools, etc.
 Set operating pressure according to need.
The appliance works in the most economical tempera-
ture range.
Note: The temperature can be regulated up to 140 °F/
60 °C.
We recommend the following cleaning temperatures:
– Light contaminations
86 °F/30 °C-122 °F/50 °C
– Contaminations containing protein, i.e. in the food
processing industry
max. 140 °F/60 °C
– Vehicle cleaning, machine cleaning
140 °F/60 °C-194 °F/90 °C
– De-preserve, contaminations containing strong fat
contents
212 °F/100 °C-230 °F/110 °C
– De-frosting of surcharge substances, partially fa-
cade cleaning
up to 284 °F/140 °C
 DANGER
Scalding danger!
 Set temperature regulator to desired temperature.
 DANGER
Scalding danger!
Therefore the following measures must definitely be
performed:

 In steam operation (> 100°C), use the steam
nozzle available as an accessory (for part no.,
see technical data).
 Set the working pressure/quantity regulation at the
pump unit to the minimum quantity.
 Set temperature regulator to min. 212 °F/100 °C.
 Secure the trigger gun. To do so, push the safety
catch towards the front.
 Set dosing value for detergent to "0".
 Set the appliance switch to "1" (operation with cold
water).
 Open the hand spray gun and rinse the appliance
for at least 1 minute.
 DANGER
Danger of scalding from hot water! After the operation
with hot water or steam, the device must be operated
with opened gun with cold water for at least two min-
utes.
 Shut off water supply.
 Open the hand spray gun.
 Switch on the pump with the power switch and al-
low to run for about 5-10 seconds.
 Close the hand spray gun.
Turning on the Appliance
Adjust cleaning temperature
Set working pressure and flow rate
Pressure/quantity regulation of the pump unit
Operation with detergent
Cleaning
Recommended cleaning method
Operating with cold water
Eco operation
Operating with hot water/steam
Operating with hot water
Operating with steam
Interrupting operation
After operation with detergent
Turn off the appliance
13EN