KARCHER K 7.20 MX Pressure Washer Instruction Manual

: June 16, 2024
: Karcher

KARCHER K 7.20 MX Pressure Washer

KARCHER-K-7.20-MX-Pressure-Washer-PRODUCT

Product Information

Specifications

Power Supply: 230 V 1~50 Hz
Power Consumption: 3.0 kW
Current: 16 A
Resistance: 0.328 Ohm + j0.205 Ohm
IP Rating: IP X5
Pressure: 14 MPa (max), 16 MPa (rated)
Flow Rate: 9.2 l/min (max), 0-0.6 l/min (adjustable)
Noise Level: 73 dB(A) (measured), 95 dB(A) (guaranteed)
Dimensions: 339 mm x 324 mm x 900 mm
Weight: 22.3 kg

Product Usage Instructions

General Information

Please read and comply with these instructions prior to the initial operation of your appliance. Retain these operating instructions for future reference or for subsequent possessors.

Safety Instructions

Danger: Avoid directing the high-pressure jet at yourself or others to clean clothing or footwear.
Warning: Maintain a minimum distance of 30 cm from the jet when using safety devices.

Operation

The appliance consists of the following components:

Main unit with motor and pump
Water inlet with filter
Detergent tank
Power cord with plug
Transport wheel
Hand spray gun
Locking mechanism for hand spray gun
High-pressure hose
Button for disconnecting the high-pressure hose

Before Starting

Ensure proper water supply to the appliance.

Starting the Appliance

Follow these steps to start the appliance:

Connect the appliance to a power source using the power cord and plug.
Turn on the water supply.
Press the power button to start the motor.

Operating the Appliance

To use the high-pressure jet, follow these steps:

Hold the hand spray gun firmly.
Aim the nozzle at the desired surface to be cleaned.
Press the trigger on the hand spray gun to release the high-pressure jet.

Working with Detergent

If using detergent, follow these steps:

Fill the detergent tank with the appropriate cleaning solution.
Adjust the detergent flow rate using the control knob.
Spray the detergent onto the surface to be cleaned.

Pausing and Stopping Operation

To pause or stop the operation, follow these steps:

Release the trigger on the hand spray gun to pause the high-pressure jet.
Press the power button to stop the motor.
Turn off the water supply.

Maintenance and Care

Danger: Before performing any maintenance, ensure the appliance is disconnected from the power source and the water supply is turned off.
Warning: Regularly clean the filter to prevent blockages and ensure proper water flow.
Maintenance: Refer to the user manual for detailed instructions on maintenance procedures.
Storage: Store the appliance in a dry and frost-free area.
Frost Protection: If storing the appliance in cold temperatures, use antifreeze or store it in a frost-proof space.
Spare Parts: In case of any damage or malfunction, contact an authorized Customer Service center for replacement parts.

OVERVIEW

KARCHER-K-7.20-MX-Pressure-Washer-FIG-1

INSTALLATION

KARCHER-K-7.20-MX-Pressure-Washer-FIG-2

Hazard levels

Danger
Immediate danger that can cause severe injury or even death.
Warning
Possible hazardous situation that could lead to severe injury or even death.
Caution
Possible hazardous situation that could lead to mild injury to persons or damage to property.

Proper Use

This high-pressure cleaner is designed for domestic use only:

to clean machines, vehicles, buildings, tools, facades, terraces, garden equip-ment etc. using a high-pressure water jet (and detergents if required).
with accessories, replacement parts and detergents approved by Kärcher. Observe the instructions provided with these detergents.

Environmental protection

The packaging material can be recy-cled. Please do not place the packag-ing into the ordinary refuse for disposal, but arrange for the proper recycling.
Old appliances contain valuable ma-terials that can be recycled. Please arrange for the proper recycling of old appliances. Please dispose your old appliances using appropriate collec-tion systems

Warranty

The warranty terms published by our com-petent sales company are applicable in each country. We will repair potential fail-ures of your appliance within the warranty period free of charge, provided that such failure is caused by faulty material or de-fects in fabrication. In the event of a warran-ty claim please contact your dealer or the nearest authorized Customer Service cent-er. Please submit the proof of purchase.(See address on the reverse)

Safety instructions

Danger

Never touch the mains plug and the socket with wet hands.
The appliance must not be used if the power cord or important parts of the appliance, e.g. high-pressure hoses, trigger guns or safety devices are damaged.
Check the power cord with the main plug for damage before every use. If the power cord is damaged, please arrange immediately for the exchange by an authorized customer service or a skilled electrician.
Check the high-pressure hose for damage before every use. Please arrange for the immediate exchange of a damaged high-pressure hose.
The appliance may not be used in areas where a risk of explosion is present.
If the appliance is used in hazardous areas (e.g. filling stations) the corresponding safety provisions must be observed.
High-pressure jets can be dangerous if improperly used. The jet must not be directed at persons, and- mals, live electrical equipment or at the appliance itself.
The high-pressure jet must not be directed at other persons or directed by the user at him/herself to clean clothing or footwear.
Never use the appliance to clean objects containing hazardous substances (e.g. asbestos).
Vehicle tyres or tyre valves are susceptible to damage from the high-pressure jet and may burst. The first indication of this is a discolouration of the tyre. Damaged vehicle tyres/tyre valves are highly dangerous. Ensure that a distance of at least 30 cm is observed when cleaning with the jet!
Never draw in fluids containing solvents or undiluted acids and solvents! This includes petrol, paint thinner and heating oil. The spray mist thus generated is highly inflammable, explosive and poisonous. Do not use acetone, undiluted acids and solvents as they are aggressive towards the materials from which the appliance is made.

Warning

The mains plug and the coupling of an extension cable must be watertight and must never lay in the water.
Unsuitable extension cables can be hazardous. Only use extension cables outdoors which have been approved for this purpose and labelled with a sufficient cable cross-section: 1 – 10 m: 1.5 mm2; 10 – 30 m: 2.5 mm2
Always fully unroll electrical cables from the cable drum.
High-pressure hoses, fixtures and couplings are important for the safety of the appliance. Only use high-pressure hos-es, fixtures and couplings recommended by the manufacturer.
This device is not intended for use by persons (including children) with reduced physical, sensory or mental abilities or lacking experience and/or knowledge unless they are supervised by a person responsible for their safety or are instructed by these persons on the use of the device. Children should be supervised, to ensure that they do not play with the device.
The operator must use the appliance correctly. When working with the applicant, he must consider the local conditions and pay due care and attention to other persons, in particular children, who are nearby.
Do not use the appliance when there are other persons around unless they are also wearing safety equipment.
Wear protective clothing and safety goggles to protect against splashback containing water or dirt.

Caution

Observe a distance of at least 30 cm when using the jet to clean painted sur-faces to avoid damaging paintwork.
Never leave the appliance unattended when it is in operation.
Make sure that the power cable or ex-tension cables are not damaged by run-ning over, pinching, dragging or similar. Protect the power cable from heat, oil, and sharp edges.
All current-conducting parts in the work-ing area must be protected against jet water.
The appliance may only be connected to an electrical supply which has been installed in accordance with IEC 60364.
The appliance may only be connected to alternating current. The voltage must correspond with the type plate on the appliance.
The maximum tolerable mains imped-ance at the electrical contact point (see Technical Data) must not be exceeded.
For safety reasons, we recommend that you operate the appliance only via a earth-leakage circuit breaker (max. 30 mA).
Cleaning operations which produce oily waste water, e.g. engine washes, un-derbody washes, may only be carried out using washing stations equipped with an oil separator.
This appliance was designed to be used with detergents which are sup-plied or recommended by the manufac-turer. The use of other detergents or chemicals may compromise the safety of the appliance.

Safety Devices

Caution
Safety devices protect the user and must not be modified or bypassed.

Power switch
The appliance switch prevents unintentional operation of the appliance.

Lock trigger gun
This lock locks the lever of the trigger gun and prevents the inadvertent start of the appliance.

Operation

Description of the Appliance

When unpacking the product, make sure that no accessories are missing and that none of the package contents have been damaged. If you detect any transport dam-ages please contact your dealer. Illustrations on fold-out
pages!

High-pressure connection
Coupling element for water connection
Connection for water supply with filter
Appliance switch “0/OFF“/ „I/ON“
Storage for trigger gun
Storage for high-pressure hose
Transport handle
Storage for spray lance
Dosage regulator for detergent
Detergent suction hose (with filter)
Detergent Tank
Mains cable with mains plug
Bearing wheel
Trigger gun
Lock trigger gun
High-pressure hose
Key to detaching the high-pressure hose from the trigger gun
Washing brush
Spray lance with dirt blaster
Spray lance with pressure regulation (Vario Power)
KÄRCHER Twin Jet
included in the scope of delivery possible accessories

Special accessories
Special accessories expand the possibili-ties of using your appliance. Please contact your Kärcher dealer for further information.

Before Startup

Mount loose parts delivered with appliance prior to start-up.
Illustrations on Page 4

Illustration 1
Insert the transport handle and screw it in.
Illustration2
Attach the accessories holder.
Illustration 3
Insert holder for trigger gun.
Illustration 4
Push the high-pressure hose into the trigger gun until it locks audibly. Note: Make sure the connection nipple is aligned correctly.
Check the secure connection by pulling on the high-pressure hose.

Water supply

According to the applicable regulations, the appliance must never be used on the drinking water supply without a system separator. Use a suitable system separator manufactured by Kärcher; or, as an alternative, a system separator as per EN 12729 Type BA.
Note: Impurities in the water can damage the high-pressure pump and accessories. For protection, the use of the Kärcher water filter (optional accessory, order no. 4.730- 059) is recommended.

Water supply from mains
Observe regulations of water suppliers. For connection values, see type plate/technical data.

Use a fiber-reinforced water hose (not included) with a standard coupling.
(Minimum diameter 1/2 inch (13 mm), minimum length 7.5 m).
Screw the coupling unit (supplied) to the water connection on the appliance.
Push the water supply hose onto the coupling unit, then connect it to the water supply.

Drawing in water from open reservoirs

This high-pressure cleaner is suited to work with the Kärcher suction hose with backflow valve (Optional accessory, order no. 4.440- 238) to draw in surface water, e.g. from water butts or ponds (see specifications for max. suction height).

Fill the Kärcher suction hose with backflow valve with water, screw to the water supply, and hang it into the water butt.

Separate the high-pressure hose from the high-pressure connection point of the appliance.
Switch the appliance on “I/ON” and operate until the water exits the high-pressure connection without bubbles.
Turn off the appliance “0/OFF”.

Startup

Caution
Never operate the high-pressure cleaner when the tap is turned off as dry running will damage the high-pressure pump.

Connect the high-pressure hose to the high-pressure connection of the appliance.
Push the spray lance into the trigger gun and fasten it by turning it through 90°.
Completely open the water tap. › Insert the mains plug into the socket.
Turn on the appliance “I/ON”.

Operation

Danger

The trigger gun is subjected to a recoil force when the water jet is discharged. Make sure that you have a firm footing and are also holding the trigger gun and spray lance firmly.

Illustration 5l Unlock the lever on the trigger gun.
Pull on the lever of the trigger gun; the device will switch on.

Note: Release the lever of the trigger gun; the device will switch off again. High pressure remains in the system.

Spray lance with pressure regulation
Carrying out the most common cleaning asks. The work pressure can be stageless- ly regulated between “Min” and “Max”. Release the lever on the trigger gun. Turn the spray lance to the desired position.

Spray lance with dirt blaster
For particularly dirty items or areas. Not suitable for use with detergents.

KÄRCHER Twin Jet
For particularly dirty items or areas.
Not suitable for use with detergents.

Turn the spray lance to the desired position.
Tighten the safety cover.

Washing brush
Suitable for use with detergents.

Working with detergent

We recommend the Kärcher cleaning and care program that will match the respective cleaning requirements. Please seek consultation or request information on the subject.

Use spray lance with pressure regulation (Vario Power).
Turn the spray lance to “Mix” position.

Fill the detergent solution in the detergent tank (observe dosage instructions on the packaging of the detergent). Adjust the suction volume of the detergent solution by means of the dosage regulator for detergents.

Medium quantity: Central position
Large quantity: “+” position
Small quantity: “-” position

Recommended cleaning method
→ Spray the detergent sparingly on the dry surface and allow it to react, but not to dry.
→ Spray off loosened dirt with the high-pressure ray.

Interrupting operation

Release the lever on the trigger gun.

Illustration 16
Lock the lever on the trigger gun.

During longer breaks (more than 5 minutes), also turn the appliance off using the “0/OFF” switch.
Insert the trigger gun in its holder.

Finish operation

Caution
Only separate the high-pressure hose from the trigger gun or the appliance while there is no pressure in the system.

After operation with detergent: Fill the detergent tank with clear water, turn the spray pipe with pressure regulator to the position “Mix”, switch the appliance on for about 1 minute and rinse with clear water.
Release the lever on the trigger gun.
Turn off the appliance “0/OFF”.
Turn off the tap.
Detach the appliance from the water supply.
Press the lever on the trigger gun to release any remaining pressure in the system.
Illustration 16
Lock the lever on the trigger gun. › Pull out the mains plug.
Roll up the power cord and loop it e.g. round the handle.
Insert the trigger gun in its holder.
Stow away the accessories in the ac- cessory holder.
Suspend the high-pressure hose into its holder.

Maintenance and care

Tum of the appliance and remove the mains plug before any care and maintenance work.

Maintenance

The appliance is maintenance-free.

Storage
Prior to longer periods of storage, e.g. in the winter:

Completely drain all water from the appliance: Switch the appliance on with a detached high-pressure hose and de-attached water supply (max. 1 minute) and wait, until no more water exits at the high-pressure connection. Turn off the appliance.
Remove the filter from the suction hose for detergent and clean under running water.
Pull out the sieve in the water connection using flat-nose pliers and clean under running water.

Frost protection

Caution
Protect the appliance and its accessories against frost.
The appliance and its accessories can get destroyed through frost if there are any water residues in it. To avoid damage to them

Store the appliance and the entire accessories in a frost-safe room.

Spare parts

Use only original Kärcher spare parts. You will find a list of spare parts at the end of these operating instructions.

Troubleshooting

You can rectify minor faults yourself with the help of the following overview. If in doubt, please consult the authorized customer service.

Danger
Turn off the appliance and remove the mains plug prior to any care and maintenance work.
Repair works may only be performed by the authorized customer service.

The appliance is not running

Check whether the voltage indicated on the type plate corresponds to the voltage of the mains supply.
• Check the mains connection cable for damages.

Pressure does not build up in the appliance

Check the setting at the spray lance.
Appliance ventilation: Switch the appliance on with the high-pressure hose detached and operate until the water flows through the high-pressure connection without bubbles. Switch off the appliance and reconnect the high-pressure hose.
Check the water supply.
Pull out the sieve in the water connection using flat-nose pliers and clean under running water.
The appliance does not start, motor hums Cause: Voltage reduction due to weak mains supply or when using an extension cable.
When switching on, first pull the lever of the trigger gun and then switch the ap- pliance switch to “I/ON”.

Strong pressure fluctuations

Clean high-pressure nozzle: Remove dirt and debris from the nozzle bore, using a needle, and rinse through with water from the front.
Check water flow quantity.

Appliance is leaking

Slight leakage from the appliance pump is normal. If the leakage increases con- tact the authorized customer service.

No detergent in food

Use spray lance with pressure regulation (Vario Power).
Turn the spray lance to the “Mix” position.
Clean the detergent suction hose filter.
Check the settings at the detergent dosing regulator.

Technical Specification

Power connection
Voltage
Connected load
Mains fuse (slow-blow)
Maximum allowed net impedance
Protective class
Protection class

Water connection
Max. feed temperature
Min. feed volume
Max. feed pressure
Max. Suction height

Performance data
Working pressure
Max. permissible pressure
Water flow rate
Detergent flow rate
Recoil force of trigger gun
Hand-arm vibration (ISO 5349)
Sound pressure level LpA (EN60704-1)
Sound power level LWA (2000/14/EG)

Dimensions

Length 339 mm

Width 324 mm

Height 900 mm

Weight 22,3 kg

CE declaration

We hereby declare that the machine described below complies with the relevant basic safety and health requirements of the EU Directives, both in its basic design and construction as well as in the version put into circulation by us. This declaration shall cease to be valid if the machine is modified without our prior approval.

Product: High-pressure cleaner

Type: 1.034-xxx

Relevant EU Directives
98/37/EC
2006/95/EC
2004/108/EC
2000/14/EC

Applied harmonized standards
EN 55014–1: 2006
EN 55014–2: 1997 + A1: 2001
EN 60335–1
EN 60335–2–79
EN 61000–3–2: 2000 + A2: 2005
EN 61000–3–11: 2000

Applied Conformity Evaluation Method

Appendix V

Sound power level dB(A)
Measured: 93
Guaranteed: 95

The undersigned acts on behalf and under the power of attorney of the company management.

FAQ (Frequently Asked Questions)

Q: How should I dispose of the packaging material?

A: The packaging material can be recycled. Please do not place it in the ordinary refuse for disposal. Arrange for proper recycling.

Q: Can I recycle my old appliance?

A: Yes, old appliances contain valuable materials that can be recycled. Please arrange for the proper recycling of old appliances using appropriate collection systems.

Q: What should I do in case of a warranty claim?

A: In the event of a warranty claim, please contact your dealer or the nearest authorized Customer Service center. Make sure to submit the proof of purchase.