Safety Devices; Start Up; Installing The Handle - Kärcher HDS 7/9-4 M/MX Mode D'emploi

Safety Devices

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.
Overflow valve with two pressure
– 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.
Safety valve
– 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.
Water shortage safeguard
– The water shortage safeguard prevents
the burner to be turned on when there is
water shortage.
– A sieve prevents the contamination of
the safeguard and must be cleaned reg-
ular.
Temperature stop for exhaust gases
– The temperature stop switches off the
machine when the waste gases have
reached very high temperatures.
28
switches
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.

Installing the handle

Figure 3
ATTENTION
Hook the electric supply line into the cable
guide of the right handle bow. Ensure that
the cable is not damaged.
Attach the wheel caps
Figure 4
Replace the system care bottle
Note: Push the bottle in securely to pene-
trate the closure. Do not remove bottle until
it is empty.
Note: To protect the device, the burner is
switched off 5 hours after the system care
bottle is empty.
– The system care prevents the calcifica-
tion of the heating spiral while operating
with calciferous tap water. It is dosed
into the supply in the float container
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.
– 4
EN

Start up