Kärcher SB MU Manual Del Usuario página 54

Anti-freeze circuit with emergency
frost protection
1 Safety valve
2 Fresh water supply
3 Advance, tool frost protection
4 Solenoid valve emergency frost protec-
tion, open without power 5 swimming valve
6 Collection chute anti-freeze water
7 Immersion pump
8 Filter
9 Backflow of frost protection water
Frost protection with lost water
1 Fresh water supply
2 Solenoid valve anti-freeze, open with-
out power
3 Safety valve
54
Monitoring and safety devices
Overflow valve of high-pressure pump
Opens when the permissible operating
–
pressure is exceeded - also even the le-
ver for hand-spray gun is released and
circulates the water. The high-pressure
jet is available when the hand-spray
gun is opened again.
The overflow valve is set by the manufac-
turer and sealed. Setting only by customer
service.
Motor protection switch
The motor protection switch interrupts
–
the electric circuit if the motor is over-
loaded.
Hard water sensor
If the residual hardness of the softened wa-
ter exceeds a limit value, the system is
switched over to the second base exchang-
er bottle. The depleted base exchanger
bottle is regenerated.
Pressure switch water shortage
For each type of water there is one pres-
sure switch.
In case of water shortage, an error mes-
sage is displayed.
Level switch Buffer tank is full
Switches off the pump when the buffer tank
for permeate is full.
Level sensor pump RO on
Switches on the RO pump to produce per-
meate.
Level switch Buffer tank is empty
Emits a signal to the system when the per-
meate buffer tank is empty.
Temperature monitoring hot water
If the warm water temperature exceeds 60
°C, it is switched over to fresh water for pro-
tection of the pumps.
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EN