Kärcher WOMA HP-DG, Manual

Page: 18 / 235

18 English
9.3.2 Visual inspection

Independent of the daily inspection, perform a visual in-
spection of all components of the spray unit before in-
stallation.
Do not use the product if deviations from its condition on
delivery are determined. In this case, have a safety inspec-
tion to be conducted.
9.4 Service
9.4.1 Safety inspection
For safety reasons, safety inspection and service work
may only be performed by service personnel from WOMA
GmbH or by trained technical personnel (see chapter 2.4
Personnel qualifications).

Have the product checked for the correct condition
every 12 months.
9.4.2 Changing the cartridge
If additional water is expelled from the bypass line and/or
the relief bores in the product when the spray unit is actu-
ated then the cartridge in the pressure housing must be re-
placed.
A pre-assembled cartridge (material number 9.919-046.0)
may be replaced by untrained technical personnel as fol-
lows.
ATTENTION
Improper installation
Improper installation with damaged or dirty components
can lead to malfunctions and damage to the product.
Perform a visual inspection of all spray device elements
before installation.
All threads must be clean and undamaged.
The sealing surfaces of mating components must not have
any scratches or scoring.
A non-pre-assembled cartridge may only be replaced by
trained technical personnel.
(See illustration on page 2)
1. Release the bypass screw from the pressure housing
and remove together with the cartridge.
2. Remove the spring from the pressure housing and re-
place with a new spring.
3. Disconnect the bypass screw from the cartridge.
4. Remove the seal (O-ring) from the groove in the bypass
screw.
5. Fit the seal (O-ring) in the groove.
6. Fit the bypass screw positively into the pre-assembled
cartridge (material number 9.919-046.0).
7. Coat the thread of the bypass screw with thread instal-
lation paste before installation (see Chapter 12.2 Con-
sumables).
8. Coat the fitting surfaces of the cartridge with anti-seize
installation (see Chapter 12.2 Consumables).
9. Screw the bypass screw with the cartridge into the pres-
sure housing and tighten to a torque of 100 Nm.
10 Troubleshooting guide
10.1 Safety instructions
For safety reasons, malfunctions may only be corrected by
Service personnel from WOMA GmbH or by trained tech-
nical personnel.
11 Technical data
Subject to technical modifications.
12 Appendix
12.1 Water quality guideline
The limit values for the required water quality are an ex-
cerpt from the WOMA water quality guideline, which can
be obtained from the WOMA GmbH (see Chapter 1.3 Ser-
vice).
12.2 Consumables
Material number 9.918-187.0
Operating pressure max. bar 1500
Medium temperature max. °C 95
Flow rate max. l/min 45
Recoil force without body support N 150
Recoil force with body support N 250
Weight (without attachments) approx. kg 3.3
Length without spray lance approx. mm 340
Height approx. mm 200
Width approx. mm 50
Connection for hose connection M22x1.5-24°DKO
High-pressure hose connection 9/16"-18 UNF-LH 
M24x1.5-24°DKO
Spray tube / spray lance connection 9/16"-18 UNF-LH
Bypass connection
G 3/8"
Controller Mechanical by-
pass
Solid body content, max. 200 mg/l
Total water hardness 1 - 20 °H
CaO 10 - 200 mg/l
CaCO
3
18 - 357 mg/l
Calcium hardness 0.89 - 3.39 mmol/l
pH value 6.5 - 9.5
Base capacity (pH 8.2) 0 - 0.25 mmol/l
Proportion of total dissolved material 10 - 75 mg/l
Conductivity
100 - 1000 μS/cm
Chloride (e. g. NaCl) < 100 mg/l
Iron (Fe) < 0.2 mg/l
Fluoride (F) < 0.15 mg/l
Free chlorine (Cl) < 1 mg/l
Copper (Cu) < 2 mg/l
Manganese (Mn) < 0.05 mg/l
Phosphate (H
3
PO
4
) < 50 mg/l
Silicate (Si
x
O
y
) < 20 mg/l
Sulphate (SO
4
) < 100 mg/l
Description Container Material
number
Thread installation paste 500 g 9.892-362.0
Thread installation paste 207 g 9.740-194.0
Anti-seize installation paste 450 g 9.892-352.0
Anti-seize installation paste 85 g 9.740-195.0