Kärcher HWE 4000 Gas, Manual

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DANGER
Danger of injury by electric shock.
– Before starting any work on the plant, switch off the main
switch and ensure that it will not be put on accidentally.
– Depressurize the system.
– Work on electrical plant only to be carried out by qualified and
authorised electricians.
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DANGER
Risk of accident due to improper maintenance!
– Service and repairs may only be carried out by authorised
persons or Kärcher Customer Service.
– Adjustments and settings to the regulators and safety equip-
ment may only be carried out by Customer Service.
– Service and repairs to the gas burner may only be carried out
by authorised Customer Service technicians.
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DANGER
Risk of injury on account of scalding or burns due to contact with
hot burner parts such as exhaust pipe, burner flange and hot wa-
ter or steam pipes. Let the plant cool down sufficiently before
starting any maintenance or repairs work.
– Only use accessories and spare parts which have been ap-
proved by the manufacturer. The exclusive use of original ac-
cessories and original spare parts ensures that the appliance
can be operated safely and trouble free.
This is also applicable to the consumables and detergents.
– Observe all instructions on safety and use which are accom-
panying these parts.
Care and maintenance
Maintenance schedule
Time Activity Assembly affected Performance of whom
weekly or after
30 operating
hours opinion Entire hydraulic installation Check for leaks. Operator
opinion Anti-calcification unit (optional) Check functioning on the basis of the water hard-
ness values (below 10 °dH). Operator
opinion Manometer of the high pressure
pump Water pressure = reference value? Operator
Steam jet pressure = reference value? Operator
opinion Thermostat "hot water" Water temperature = reference value? Operator
Thermostat "steam stage“ Steam jet temperature = reference value? Operator
opinion Fuel inlet Check fuel inlet pipe for leaks and the filter for
cleanliness. Operator
monthly or after
120 operating
hours Check function Safety switch for water scarcity Close water supply, the burner must switch off or
rather not start.
Operator
Replace defective component. Customer
Service
Check function Water shortage safeguard Close water supply, the burner must switch off or
rather not start. Operator
Replace defective component. Customer
Service
Check function Thermostat "hot water“ and
"steam stage“ Check whether the regulator functions properly in
all the three operating modes: Operate with hot
water, spray jet operations, operate with steam
(see chapter "Function"). Operator
opinion Safety valves Check for leaks. Operator
half-yearly or af-
ter 750 operating
hours Clean the filter Heating coil, burner and boiler
parts Dismantle the burner chamber and the boiler
sleeve using special removing devices and clean
all the parts. Customer
Service
opinion Heating coil Decalcify the heating coil when the pressure in-
creases to more than 10% of the normal value. Trained oper-
ator
opinion Safety temperature stop, exhaust
temperature stop, pressure
guard (min.) Check for correct functioning. Customer
Service
Clean the filter Burner Clean depending on the exhaust values (special
soot values). Customer
Service
opinion Motor bearing of the burner Replace if it is making noise; otherwise there will
be some other damages. Customer
Service
annual Safety check Entire high pressure cleaning unit Perform a safety inspection as per the applicable
national rules and regulations for liquid spray jets
of the respective country.
Technical ex-
pert
Safety check Gas installation Perform a safety inspection as per the applicable
national rules and regulations for gas installations
of the respective country. Technical ex-
pert, gas sup-
plier
at least every 5
years, recurring Pressure test Entire high pressure cleaning unit Perform the pressure test as per manufacturer's
instructions.
Technical ex-
pert
34 EN