Unit Function
HDS Middle Range / HDS Premium Range
Page 54 / 127
Service Manual 04.2008
2.24 Functional diagram, pressure operation
1 Cleaning agent tank 1
2 Cleaning agent suction hose with filter
3 Level sensor, cleaning agent tank 1
(optional)
4 Cleaning agent suction hose with filter
5 Level sensor, cleaning agent tank 2
(optional)
6 Cleaning agent tank 2
9 Cleaning agent solenoid valve 2 (optional)
10 Cleaning agent solenoid valve 1 (optional)
11 Cleaning agent metering valve
12 Cleaning agent suction hose
13 Cleaning agent non-return valve
14 Pressure switch, „ON“
15 Pressure and flow control valve
16 Oil reservoir
17 Water connection
18 Water inlet hose
19 Fuel filter
20 Fuel tank
21 Level sensor, fuel tank
22 Fuel suction line
23 Fuel return line
24 Fuel pump
25 Solenoid valve, fuel pump
26 Continuous-flow heater
27 Fuel pressure line
28 Ignition electrodes
29 Fuel nozzle
30 Exhaust connecting sleeve
31 Exhaust temperature sensor
32 Adjustment, water temperature
33 Printed circuit board
34 Temperature sensor
35 Heating coil, continuous flow heater
36 Air flap, air volume adjustment
37 Fine water filter
38 Burner fan
39 Motor housing with cooling coil (in water-
cooled motor only)
40 Pressure switch, „OFF“
41 Safety block with low-water protection
and safety valve
42 Pressure gauge
43 Pressure pipe
44 Solenoid valve, scale inhibitor
45 Level sensor, scale inhibitor tank
46 Scale inhibitor tank
47 Float valve
48 Float tank
49 High-pressure nozzle
50 Spray lance
51 Softgrip easy-press handgun
52 High-pressure hose
53 Rotary control for pressure and flow
control valve
54 Rinsing line
