Kränzle High-Pressure Cleaner Operating Manual

Introduction

Dear customer, Kränzle congratulates you on the purchase of your new high-pressure cleaner. Kränzle high-pressure cleaners are known for their quality, convenient and compact design, and suitability for everyday use. This manual provides detailed information on the use, safety, and maintenance of your Kränzle high-pressure cleaner. Please read and follow all safety instructions before use.

This manual is a translation of the original manual. Technical data is available in the separate Spare Parts List, which is considered part of this operating manual. Keep both leaflets for future reference.

Explanatory Symbols

Symbols are used throughout this manual and on the high-pressure cleaner itself to convey important safety and operational information:

• Environmental Damage: ? Failure to observe this note may entail environmental damage.
• Note on Use: ⚠️ Failure to adhere to instructions may cause excessive wear or total breakdown.
• Warning: ❗ Failure to observe this note may result in serious injuries!
• Dangerous High-Pressure Jets: In case of improper use, high-pressure jets can be very dangerous. Do not direct at persons, animals, electrical equipment, or the cleaner itself.
• Public Drinking Water: The cleaner may not be connected directly to the public drinking water supply network.
• Risk of Burns: ? Risk of burns due to hot surfaces!
• Disposal: ?️ Products marked with this symbol may contain constituents posing a risk to health or the environment if incorrectly disposed of. These products must never be disposed of as household waste.
• Recyclable Packaging: ♻️ This symbol denotes recyclable packaging materials. Information on proper disposal will be gathered from local recycling directives.

Safety Notes

Always wear appropriate protective clothing, including waterproof clothing, rubber boots, safety goggles, and ear protection. It is prohibited to use the high-pressure cleaner near people without suitable protective clothing.

Be aware that aerosols may be generated during use, which can be harmful. Employers must conduct hazard assessments and provide necessary protective measures, such as respiratory masks (Class FFP 2 or higher) for aqueous aerosols.

Ensure the mains disconnect switch is always switched off when the cleaner is unattended.

Prohibited Actions:

• Do not spray against asbestos or other hazardous substances.
• Never spray flammable liquids or solvents (e.g., paint thinners, petrol, oil) due to explosion hazard.
• Maintain a minimum distance of 30 cm from the object being cleaned (e.g., car tires) to prevent damage from the high-pressure jet.
• Only use high-pressure hoses, couplings, and fittings recommended by Kränzle.
• If using an extension cable, ensure it is suitable for outdoor use, kept dry, and situated above ground. Use a cable drum to keep the socket at least 60 mm above ground.
• Never deactivate or bypass safety devices.
• The cleaner is not designed for use by persons with restricted physical, sensory, or mental abilities, including children.
• Never direct the high-pressure jet at the cleaner itself, power sockets, or electrical installations. Protect live parts from water.
• Never direct the high-pressure jet at people or animals.
• Only use power supply cables in perfect working order. Do not damage or improperly repair cables.
• Never pull the high-pressure hose if it has formed kinks or "nooses", or pull it over sharp edges.
• Apply the safety catch on the safety trigger gun after each use to prevent unintentional spraying.

When using high-pressure water for cleaning, ensure a firm footing due to the recoil effect on the lance.

Keep children and untrained persons supervised and away from the equipment.

Description of High-Pressure Cleaner

The Kränzle HD 7/122, HD 7/122 TS, HD 10/122, and HD 10/122 TS are portable high-pressure cleaners.

Key Components:

• Shaped handle
• Pump head made of special brass
• Start/Stop switch (on TS models)
• Power supply cable with mains plug
• Large stainless steel pressure gauge
• Pump outlet / high-pressure hose connection
• Supply including water inlet filter
• On/Off switch with motor protection
• Infinitely variable pressure and quantity regulation

Included in your purchase:

• Kränzle high-pressure cleaner (specified model)
• Safety trigger gun with screwing
• Dirtkiller lance with stainless steel pipe (optional)
• Stainless steel lance with flat jet nozzle
• Operating manual & Spare parts list
• High-pressure hose

General Rules

Intended Use: For high-pressure water jet cleaning applications without detergents or low-pressure cleaning with detergents (e.g., foam injector or washing brush).

Environmental Regulations: Observe environmental, refuse disposal, and water protection regulations.

Inspections: For industrial use, the cleaner must be inspected by an expert every 12 months according to the "Guidelines for Liquid Spray Devices". Inspection results should be recorded.

Accident Prevention: The cleaner is designed to prevent accidents when used correctly. Be aware of the risk of injury from hot machine parts and the high-pressure jet.

Oil Change:

• First oil change: approx. 50 operating hours.
• Subsequent changes: every year or after 250 operating hours.
• Change oil if it turns grey or white.
• Use Kränzle High Performance Gear Oil (Item no.: 400932). Capacity: 0.25 L.
• Dispose of used oil properly in an approved manner.

Oil Leakage: Contact after-sales service immediately if oil leaks. Failure to do so may cause environmental damage or damage to the transmission gearbox.

Condensed Water: In case of increased humidity or temperature fluctuations, condensed water may form. If the oil turns grey or white, change it.

Functional Details

Lack of Water: Insufficient water supply can lead to cavitation inside the high-pressure pump, potentially destroying it. Check water quantity by filling a liter bucket in one minute. Ensure the required minimum quantity of water is met. Lack of water can cause accelerated wear of joints (voids warranty). Never run the pump dry for more than 60 seconds.

Water Supply: Comply with local waterworks regulations. Direct connection to public drinking water lines is prohibited unless a non-return valve with tube ventilator (Kränzle item no.: 410164) is installed. Indirect connection via a reservoir with a float valve is permissible. Direct connection to non-drinking water supply lines is allowed.

Insufficient Quantity of Electricity: Too many connected devices can reduce voltage and current, preventing the motor from starting or causing it to blow. Insufficient power can also result from long or thin power supply cables or extension cables, leading to voltage drops and malfunctions.

Electrical Connection: Use the supplied 5-meter power supply cable. Connect to a standard grounded socket with a 30 mA residual current operated device. Connection must be done by a qualified electrician, complying with IEC60364-1. The socket must be protected by a 16 A fuse. Extension cables must have an earthed lead and a minimum cross-section of 1.5 mm² (2.5 mm² for >10m). Plug connections must be spray-proof and not on wet floors. Always unwind cable drums completely.

Water and Cleaning System: Water is supplied to the pump under pressure or directly sucked from a container. The pump forces water to the lance, where the nozzle forms the high-pressure jet.

Safety Jet Pipe with Safety Trigger Gun: Operation requires the trigger to be actuated. Pulling the trigger opens the gun, increasing spray pressure. Releasing the trigger closes the gun, preventing spray. The pressure gauge should show 0 bar when the trigger is released. The pressure control valve/safety valve manages pressure.

Totalstop-System (TS Models): On TS models, the motor starts when the safety trigger gun is opened and switches off immediately when it is closed.

Motor Protection Switch: Protects the motor against overload and blocking by automatically switching it off. If the motor repeatedly switches off, the cause must be identified and remedied.

Putting into Operation

High-Pressure Hose and Spray Device: Components are made of high-quality material. Use only manufacturer-authorized replacement parts to maintain warranty. Ensure connections are pressure-tight. Do not drive over, pull excessively, twist, or pull the hose over sharp edges. Defective hoses must be replaced, not repaired.

1. Carry the high-pressure cleaner to its place of use and ensure it has secure footing. Avoid rough surfaces where vibration might occur.
2. Unwind the high-pressure hose straight and without nooses. For extensions, ensure the maximum length of 20 m is not exceeded.
3. Screw the high-pressure hose into the pump outlet tightly.
4. Mount the grey rotating screw connection of the hose onto the safety trigger gun and screw tightly.
5. Attach the lance to the safety trigger gun.
6. Screw the lance and safety trigger gun together tightly.
7. Check the water inlet filter for cleanliness before operation. Rinse with clear water if dirty. Do not operate with a damaged filter.
8. Connect the water hose to the water inlet. Requirements: 5 m hose length, ¼" cross-section, 10 bar. The cleaner can be connected to a water mains (1-10 bar pre-pressure) with cold or hot water (up to 60 °C). The HD 7/122 and HD 7/122 TS can also suck water from a container.
9. When using hot water, be careful as metal parts can become hot. Do not touch without safety gloves.
10. Check the oil level in the oil sight glass before operation. The oil level should be visible in the middle of the glass.
11. Connect to the electrical circuit. Do not touch the plug or live parts with wet hands.
12. Switch on the cleaner with the safety trigger gun opened. Bleed the cleaner by pulling and releasing the trigger several times.
13. When using the Dirtkiller lance, point it downwards when starting.
14. Adjust operating pressure infinitely using the rotary handle. The maximum pressure is factory-set.

Direct Suction

The high-pressure pump can suck water from separate containers or ponds (up to 1 m suction height, max. 3 m hose length).

1. Mount the suction hose with suction filter (Item no.: 150383).
2. Place the filled suction hose into the water-filled container and start cleaning. Use only clean water, never water containing chlorine, and do not suction air.

Note: Before the first suction, fill the high-pressure pump and suction hose with water. If valves become sticky after prolonged standstill, connect a hose with pressurized water to the pump inlet to open the valves.

Taking Out of Operation

1. Switch off the high-pressure cleaner.
2. Cut off the water supply.
3. Briefly open the safety trigger gun catch to release pressure.
4. Apply the safety catch on the trigger gun.
5. Remove the high-pressure hose and safety trigger gun.
6. Empty the high-pressure pump by holding the hose and switching the motor on until no more water escapes.
7. Pull the plug from the socket.
8. Clean the high-pressure hose and wind it up without loops.
9. Clean and wind up the power supply cable.
10. Clean the water inlet sieve.
11. Store high-pressure cleaners in frost-free rooms.

Frost Protection: To protect against frost, empty the cleaner completely. Separate from the water supply and switch it on, opening the trigger gun to press water out. Do not operate without water for more than one minute.

Kränzle high-pressure cleaners are compact and mobile, making them easy to store.

Small Repairs - Do It Yourself

Problem: No water from nozzle, full pressure gauge.

• Cause: Nozzle is blocked.
• Proceeding: Switch off, pull plug, release pressure. Unscrew trigger gun and lance, rinse hose. Check water inlet filter. If problem persists, use a wire (paper clip) to push through the nozzle opening. If unsuccessful, the nozzle needs replacement. Safety: Pull plug before any repair.

Problem: Irregular jet from nozzle, low pressure gauge.

• Cause: Valves are soiled or sticky.
• Proceeding: Unscrew valves. Remove valve body and O-ring, check O-ring for damage. Clean valves with a wire under running water. Ensure O-ring is replaced correctly during reassembly.

Problem (HD 7/122, HD 10/122): Pressure control valve/safety valve switches, full pressure gauge after closing trigger.

• Cause 1: Leakage. Check connections (hose, gun, lance) for tightness. Check O-rings on hose, gun, and lance for damage and replace if necessary.
• Cause 2: Non-return valve is defective. Switch off, pull plug, stop water. Unscrew pump outlet. Remove check body and check O-ring and seal seat for damage or soiling. Replace defective O-rings.

Problem (HD 7/122 TS, HD 10/122 TS): Cleaner switches on/off, full pressure gauge after closing trigger.

• Cause 1: Leakage. Check connections and O-rings as described above.
• Cause 2: Non-return valve is defective. Check and replace non-return valve components as described above.

Note: No guarantee is provided for consequential damages resulting from leakage or defective O-rings causing air induction or lack of water (cavitation).

Kränzle Accessories

Kränzle offers various accessories to enhance the functionality of your high-pressure cleaner. These accessories are safety components; using unauthorized parts will void the warranty.

• Rotating washing brush: 400 mm, stainless steel extension, 180 mm brush head, 3.2 mm nozzle size (Item no.: 410501).
• Floor washer Round Cleaner UFO: 300 mm diameter, Nozzle system 045 (Not suited for HD 7/122 and HD 7/122 TS) (Item no.: 41850).
• Underbody lance: Stainless steel pipe, 1000 mm extension, Nozzle system 4007 (Item no.: 41075).
• Dirtkiller lance: Stainless steel pipe 500 mm. For HD 7/122, HD 7/122 TS: Item no.: 41570-028. For HD 10/122, HD 10/122 TS: Item no.: 41570-042.
• Foam injector: 1 litre capacity, with container, dosage in 5 levels (Item no.: 135301).
• Pipe cleaning hose with nozzle: Available in different lengths (10 m, 15 m, 20 m) with Nozzle system KN 055 (Item nos.: 410581, 41058, 410582).

When ordering, please indicate the technical data of your high-pressure cleaner (device type).

EU Declaration of Conformity

Josef Kränzle GmbH & Co. KG declares that the design of the high-pressure cleaners (HD 7/122, HD 7/122 TS, HD 10/122, HD 10/122 TS) complies with relevant EU directives including Machinery Directive 2006/42/EC, EMC Directive 2014/30/EU, ROHS Directive 2011/65/EU, and Outdoor Directive 2000/14/EC.

Nominal flow rates and noise pressure levels are specified. The product conforms to applied standards such as EN 60335 series, EN 62233, EN 55014 series, and EN 61000 series.

Manufacturer: Josef Kränzle GmbH & Co. KG, Rudolf-Diesel-Str. 20, 89257 Illertissen, Germany.

Warranty

Kränzle's warranty obligation applies to material faults and manufacturing defects. Normal wear and tear due to long and frequent use, including parts like the pressure gauge, nozzle, valves, and hoses, are excluded from warranty claims. The product must be operated in accordance with the operating manual. Changes to safety devices or maloperation (e.g., exceeding limits, insufficient water supply) may void the warranty. Only original Kränzle replacement parts ensure safe and trouble-free operation. Legal warranty claims are subject to respective country limitation periods. For warranty claims, contact your local dealer or authorized service center. More information is available at www.kraenzle.com.

Inspection Reports

High-pressure cleaners for industrial use require an expert inspection every 12 months as per the Labour Safety Inspection (UVV) Guidelines for Liquid Spray Equipment. The inspection sheet serves as proof of retest and must be kept carefully.

The report includes sections for owner details, scope of inspection (e.g., type plate, operating manual, pressure line tightness, safety valve function, hose condition), inspection data (e.g., operating pressure, insulation), and inspection results. It distinguishes between defects rectified for confirmed Labour Safety and those requiring repair for confirmation.