Karcher HDS 801 B - Manual (Page 18)

– 4
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.
The safety mechanism against lack of wa-
ter prevents the heater from over-heating
when there is no water. The burner oper-
ates only when there is adequate water
supply.
If the hand spray gun is closed, the over-
flow valve opens and the high pressure
pump diverts the water back to the pump
suction side. Thus the permissible working
pressure is not exceeded.
The overflow valve is set by the manufac-
turer and sealed. Setting only by customer
service.
The safety valve opens when the overflow
valve is defective.
The safety valve is set by the manufacturer
and sealed. Setting only by customer service.
The thermo-valve opens when the permis-
sible water temperature is exceeded and
lets out the hot water into the open.
The pressure switch switches off the burner
when the working pressure falls below the
minimum value and switches it on again
when it is exceeded.
ṇ
Danger
Risk of injury! Device, tubes, high pressure
hose and connections must be in faultless
condition. Otherwise, the appliance must
not be used.
Caution
In case of lacteous oil inform Kärcher cus-
tomer service immediately

Before using for the first time, cut off the
tip of the lid of the oil tank on the water
pump.
 Check oil level in the oil tank.
Do not operate the appliance if the oil level
has fallen below "MIN".

Add oil if required (see technical speci-
fications).
Follow the instructions given in the sec-
tion "Safety Notes"!

Read the operating instructions of the
engine manufacturer before start-up
and follow the safety instructions care-
fully.
 Check oil level of the engine.
Do not operate the appliance if the oil level
has fallen below "MIN".

If required, top up oil carefully.
 Fill the fuel tank with unleaded petrol.
Do not use 2-speed mixture.
Caution
Risk of damage to the fuel pump on ac-
count of dry running. Fill up the fuel tank up
to this mark even for cold water operations.
ƽ
Danger
Risk of explosion! Only refill diesel oil or
light fuel oil. Unsuitable fuels, e.g. petrol,
are not to be used.

Refill fuel.
 Close tank lock.
 Wipe off spilled fuel.
Safety Devices
Water shortage safeguard
Overflow valve
Safety valve
Thermo-valve at the pump
Pressure switch
Start up
Check oil level of the high pressure
pump
Motor
Refill fuel
18 EN