Safety Devices; Overflow Valve; Thermostat Valve; Start Up - Kärcher HD 9/23 DE Manual Original

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

– If the hand spray gun is closed, the
overflow valve opens and the high pres-
sure pump diverts the water back to the
pump suction side. Thus the permissi-
ble working pressure is not exceeded.
– The overflow valve is set by the manu-
facturer and sealed. Setting only by
customer service.
Safety valve
The safety valve opens when the permissi-
ble operating pressure is exceeded (see
Technical Data); water flows outside.
The safety valve is set by the manufacturer
and sealed. Setting only by customer ser-
vice.

Thermostat valve

The thermostat valve protects the high-
pressure pump from unacceptable heating
during circuit operation when the trigger
gun is closed.
The thermostat valve opens when the per-
missible water temperature of 80°C is ex-
ceeded and lets out the hot water into the
open.
DANGER
Risk of injury! Device, tubes, high pressure
hose and connections must be in faultless
condition. If they are not in a perfect state
then the appliance must not be used.

Installing the pushing handle

Figure 2, see cover page
 Fasten the push handle by means of
the fastening screws.
18

Start up

Install hand spray gun, spray lance
Note: The EASY!Lock system joins com-
ponents with a quick-fasten thread solidly
and securely with just one turn.
1.
 Insert the high pressure nozzle onto the
spray lance.
 Install union nut and hand-tighten it
(EASY!Lock).
 Join the spray lance with the trigger gun
and tighten until hand-tight
(EASY!Lock).
 Tighten the screw connection of the
spray lance finger tight.
 Join the high-pressure hose with trigger
gun and high-pressure connection of
the appliance and tighten until hand-
tight (EASY!Lock).
Check oil level of the high pressure
 Check oil level of the high pressure
pump at the oil sight glass.
Do not operate the device if the oil level has
fallen below the middle of the oil sight glass.
 Add oil if required (see technical speci-
fications).
 Before using for the first time, cut off the tip
of the lid of the oil tank on the water pump.
EN – 4
and nozzle
2.
pump