Karcher HDS-E 3-3-25-4M Ec - Manual (Page 9)

– 3
– Please follow the national rules and
regulations for fluid spray jets of the re-
spective country.
– Please follow the national rules and
regulations for accident prevention of
the respective country. Fluid spray jets
must be tested regularly and the results
of these tests must be documented in
writing.
Safety devices serve for the protection of
the user and must not be put out of opera-
tion or bypassed with respect to their func-
tion.
– While reducing the water supply at the
pump head or with the Servopress -
regulation the overflow valve opens and
part of the water flows back to the pump
suck side.
– If the hand-spray gun is closed, so that
the whole water flows back to the pump
suck side, the pressure switch at the
overflow valve shuts down the pump.
– If the hand spray gun is opened, the
pressure switch on the cylinder head
turns the pump back on.
The overflow valve is set by the manufac-
turer and sealed. Setting only by customer
service.
– The safety valve opens, when the over-
flow valve resp. the pressure switch is
broken.
The safety valve is set by the manufacturer
and sealed. Setting only by customer ser-
vice.
– The lack of water fuse prevents the
heater from being switched on when
there is a water shortage.
– The lack of water fuse switches the
pump off after 2 minutes in case of a
water shortage to prevent dry runs.
– The temperature limiter switches off the
heater when the temperature becomes
too high.
ṇ WARNING
Risk of injury! Device, tubes, high pressure
hose and connections must be in faultless
condition. Otherwise, the appliance must
not be used.

Lock parking brake.
Figure 3
Note: Push the bottle in securely to pene-
trate the closure. Do not remove bottle until
it is empty.
Note: To protect the appliance, the heater
is switched off 5 hours after the system
care bottle is empty.
– The system care effectively prevents
the calcification of the pump while oper-
ating with calcified tap water. It is dosed
into the supply in the boiler drop by
drop.
– The metering is set to medium water ri-
gidity by the manufacturer
Note: A system care bottle is included in
the delivery.

Replace the system care bottle.
 Determining the hardness of tap water:
– through the public water supply works,
– using a hardness tester (order no.
6.768-004)
Please do not let mineral oil contaminated
waste water reach soil, water or the sew-
age system. Perform engine cleaning and
bottom cleaning therefore only on speci-
fied places with an oil trap.
Safety instructions
Safety Devices
Overflow valve with two pressure
switches
Safety valve
Water shortage safeguard
Temperature controller
Start up
Installing the handle
Replace the system care bottle
Adjusting the dosage of the system
care Advance RM 110/RM 111
9 EN