Care And Service; Maintenance Instructions - Kärcher SB MB Bedienungsanleitung

Monitoring and safety devices
Pressure relief valve
The pressure relief valve opens when the permissible
operating pressure is exceeded, i.e. also when the lever
of the high-pressure gun is released, and circulates the
water. The high-pressure jet is immediately available
again when the high-pressure gun is opened again.
The overflow valve is set and sealed at the factory. Set-
ting must only be performed by Customer Service.
Safety valve
The safety valve protects the heating circuit of the wash-
ing station heater (option) against overpressure.
Thermostatic mixing valve
The thermostatic mixing valve regulates the flow tem-
perature for the washing station heater (option) depend-
ing on the return temperature.
Flame monitoring
Only for devices with oil or gas burner.
If the burner does not ignite or if the flame goes out dur-
ing operation, the flame monitor closes the fuel solenoid
valve and switches off the burner fan.
Exhaust gas thermostat
Only for devices with oil or gas burner.
If the emission temperature rises above the permissible
value, the emission thermostat switches off the burner
and locks it.
Temperature limiter
Not for electrically heated devices without washing sta-
tion heating.
If the water temperature in the hot water float tank drops
due to the withdrawal of hot water and cold water flow-
ing in, the temperature controller switches the hot water
circulation pump on and off again when the maximum
temperature is reached.
Temperature limiter
Only for devices with oil or gas burner.
The temperature limiter prevents steam from forming in
the continuous flow boiler.
Flow monitor
Only for devices with oil or gas burner.
The flow monitor switches the burner on once the hot
water hot water circulation pump has started.
Water shortage safeguard
The water shortage safeguard shuts off the hot-water
generator when the water level in the hot water float
switch is too low.
Dry running protection
Only for electrically heated devices.
Switches off the heating rod in case of overtemperature
due to water shortage.
Motor circuit breaker
The motor circuit breaker interrupts the circuit when the
motor is overloaded.
Hard water sensor
SB MB standard:
If the residual hardness of the softened water exceeds
a limit value, the controller calculates the residual ca-
pacity of the base exchanger bottle.
The regeneration of the base exchanger bottle is started
the following night at the latest.
SB MB comfort:
If the residual hardness of the softened water exceeds
a limit value, the regeneration of the base exchanger
bottle begins immediately.
Pressure sensor for water shortage RO
If there is a water shortage, the system is stopped to
prevent the RO pump from running dry.
Buffer tank full level switch
Switches off the RO pump when the permeate buffer
tank is full.
Pump RO ON level switch
Switches on the pump RO to produce permeate.
Buffer tank empty level switch
Gives a signal to the system when the buffer tank per-
meate is empty.
Temperature limiter 4. Water type / hot (option)
Prevents externally supplied hot water above 60°C from
being directed to the high-pressure pumps and damag-
ing them.
In the event of a malfunction, the system switches to an
alternative type of water (set by the service technician
during commissioning).
64

Care and service

Maintenance instructions

Regular maintenance according to the following mainte-
nance plan is fundamental for a safely operating sys-
tem.
Use only original manufacturer spare parts or parts rec-
ommended by the original manufacturer, such as
● Spare parts and wearing parts,
● Accessories,
● Operating materials,
● Detergent.
DANGER
Risk of injury
Danger of death from electric shock.
Switch off the device at the on-site main trigger and se-
cure against being switched on again before working on
the device.
Allow only qualified electricians to work on electrical
components of the system.
WARNING
Risk of injury
A high pressure water jet can escape from damaged
parts and cause injuries.
Depressurise the system by turning the trigger to "0/
OFF" and then open the high-pressure guns until the
pressure has been released from the system.
WARNING
Danger of burns
Some components of the system become hot during op-
eration and can cause burns if touched.
Allow the system to cool down before touching the fol-
lowing components: Exhaust pipe and exhaust opening,
burner with booster heater, cylinder head of the high-
pressure pump, high-pressure hose.
ATTENTION
Risk of damage
A high-pressure water jet can damage system compo-
nents.
Do not clean the interior of the system with the high-
pressure jet. When performing exterior cleaning, keep
the high-pressure jet away from the upper section of the
system (with coin slot, remaining value display and pro-
gram switch).
1. Switch off the on-site main switch and secure it
against being switched on again.
2. Disconnect the water supply.
Who is permitted for perform maintenance work?
Operator: Work labelled with "Operator" may only be
performed by instructed persons capable of operating
and maintaining high-pressure systems.
Customer Service: Work labelled with "Customer ser-
vice" may only be performed by KÄRCHER customer
service technicians or KÄRCHER-authorised techni-
cians.
Safety inspection/maintenance contract
You can agree on regular safety inspections or close a
maintenance contract with your dealer. Please seek ad-
vice on this.
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