English 5.906-548.0 Rev. 00 (04/12)
43
1 High pressure outlet, working pressure
2 Manometer, working pressure
3 Pressure retaining valve (open)
4 Pump is running
5 Rotary knob
6 Overflow valve (closed)
7 Throttle bore
8 Pressure switch "OFF" (closed)
9 Water inlet
10 Motor contactors (K1) (closed)
11 Pressure switch "ON" (open)
Note
The shown functions of the preessure switches and
motor contactor are for understanding purposes only.
In reality, the information from the two pressure
switches is transferred directly to the control electron-
ics, which in turn controls the motor contactor.
After switching on the appliance and with the gun
open, the contactor will be actuated and closes the
contacts.
This will start the motor and the pump will build up the
working pressure.
The pressure retaining valve and the pressure switch
open, the overflow valve and the pressure switch re-
main closed.
Due to the closed pressure swtich, the motor contac-
tors also remain closed.
5.13.2The appliance is switched on and the gun is open
24 Volt
6
1
3
4
7
8
9
11
5
10
2