Kränzle therm-RP 900 T Operating Manual

Dear customer,

Congratulations on your purchase of a new Kränzle high-pressure cleaner. Kränzle high-pressure cleaners are known for their high suitability for everyday use, precision, dimensional accuracy, and a technology package focused on performance, safety, and durability.

This manual provides detailed information on the use of your high-pressure cleaner. Illustrations may vary depending on the specific model or accessories.

Explanatory Symbols

Explanatory symbols used in the operating manual:

• Symbol with a leaf and water drop: Failure to observe this note may entail environmental damage.
• Symbol with an exclamation mark inside a circle: Note on the use of the high-pressure cleaner; failure to adhere to the instructions may cause excessive wear or total breakdown of the therm-RP-series.
• Symbol with an exclamation mark: Warning! Failure to observe this note may result in serious injuries!

Explanatory symbols affixed to the high-pressure cleaner:

• Symbol with a high-pressure jet: In case of improper use, the high-pressure jets can be very dangerous. Do not direct high-pressure jet at persons, animals, or active electrical equipment or the high-pressure cleaner itself.
• Symbol with a water tap and a cross: The high-pressure cleaner may not be connected directly to the public drinking water supply network.
• Symbol with a flame and a hand: Risk of burns due to hot surfaces!
• Symbol with a lightning bolt: Warning! Attention high voltage. Prior to opening the high-pressure cleaner, the main switch must be set "OFF" and the mains plug must be pulled out.
• Symbol with an hourglass: 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.

Explanatory symbols affixed on the packaging:

• Symbol with recycling arrows: This symbol denotes recyclable packaging materials which must not be disposed of as household waste. Information on proper disposal will be gathered from the recycling directives issued by your local authority.

Explanatory symbols used on the control panel:

• Symbol with an exclamation mark: Attention: For safety reasons, switch off the main switch after completing the washing procedure (i.e., supply isolation).
• Symbol with a document: Prior to putting the machine into operation, make sure that all safety instructions are observed.
• Symbol with an 'i': Prior to putting the machine into operation, make sure that all safety instructions are observed.

Explanatory symbols used on the short instruction manual:

• Step 1: Screw high-pressure hose down and pressure-tight using safety trigger gun and lance.
• Step 2: Connect water hose to water inlet. Open water tap.
• Step 3: Connect to circuit (see technical data).
• Step 4: Usage as a cold water high-pressure cleaner. Switch on high-pressure cleaner at the main switch with opened safety trigger gun. Start with cold water cleaning process.
• Step 5: Usage as a hot water high-pressure cleaner. Switch on high-pressure cleaner at the heater switch with opened safety trigger gun. Start with hot water cleaning process.

Controlling the temperature:

Set the desired temperature at the digital thermostat by pushing the plus and minus buttons (Min. temperature 40 °C). Settings are possible in cold water and hot water operation.

Safety notes

Users operating the high-pressure cleaner should wear necessary protective clothing, including waterproof clothing, rubber boots, safety goggles, and ear protection headwear. It is prohibited to use the high-pressure cleaner in close vicinity to people lacking suitable protective clothing.

If noise exceeds the maximum allowed levels, users and others in the vicinity must wear suitable ear protection.

Use of high-pressure cleaners may generate aerosols. Inhaling aerosol particles may cause health damage. Employers must conduct a hazards assessment to determine necessary protective measures against aqueous aerosols, using respiratory masks (Class FFP 2 or higher).

Whenever the high-pressure cleaner is left unattended, the mains disconnect switch must always be switched off.

Do not spray against matter containing asbestos or other hazardous substances!

Never spray flammable liquids or liquids containing solvents such as paint thinners, petrol, or oil, as this poses an explosion hazard!

Due to the high-pressure jet, damage may occur on objects being cleaned (e.g., car tires); maintain a minimum distance of 30 cm.

Prior to operation, check all components (high-pressure hose, power supply cables, safety trigger gun) for damage. Replace any defective or damaged components.

Only use high-pressure hoses, couplings, and fittings recommended by Kränzle. Only these accessories ensure the safety of the equipment.

If an extension cable is used, it must be suitable for outdoor use, kept dry, and situated above the ground. A cable drum that keeps the socket at least 60 mm above the ground is recommended.

Replacement of power supply cables is only permitted with original manufacturer cables and must be performed by a qualified electrician.

Safety devices protect the user and must never be deactivated or bypassed.

The user is required to adhere to local requirements and watch out for persons in the danger zone.

If used in elevated positions where there is a risk of the unit falling, it must be secured against rolling away or tipping over.

The high-pressure cleaner is not designed for use by persons with restricted physical, sensory, or mental abilities (including children).

Parts inside the machine, all metal parts of the trigger gun with safety catch, and the lance are hot during hot water operation. Keep all hoods and protective covers closed during operation and never touch any metal parts of the gun or lance without appropriate protective gloves.

Use only EL heating oil (DIN 51 603) or diesel fuel (DIN EN 590). Using other fuels may cause considerable risks (explosions).

When using high-pressure water for cleaning, ensure a firm footing as there is a noticeable recoil effect on the lance (see technical data).

Safety notes - This is prohibited!

• Never allow children or untrained persons to use or play with the high-pressure cleaner. Keep children under supervision to prevent them from playing with the equipment.
• Apply the safety catch on the safety trigger gun after each use to prevent unintentional spraying.
• Never direct the high-pressure jet at the high-pressure cleaner itself. The high-pressure cleaner may not be placed within reach of the high-pressure jet spray mist.
• Never direct the high-pressure jet at people or animals. Never direct the high-pressure jet at yourself or other persons, not even to clean clothing or shoes.
• Never direct the high-pressure jet at power sockets or any other electrical installations. Within the working area, all live parts must be protected from water jet and spray mist.
• Only use a power supply cable in perfect working order. Do not damage or improperly repair the power cable (e.g., tearing, squeezing, running over).
• Always pay attention to the underbody lance resting on the surface. When using a curved or angled spraying lance, be aware of the significant torque in the recoil (underbody lance is an optional accessory).
• Never pull the high-pressure hose if it has formed kinks or "nooses". Never pull the high-pressure hose over sharp edges.

Description of high-pressure cleaner

Design: therm-RP 900 T with hose drum

The therm-RP 900 T is a mobile high-pressure cleaner with an advanced arrangement system. Please see the construction scheme for more details.

Key Components:

1. Ergonomically shaped handle
2. Holder for trigger gun with safety catch and lance
3. Digital operating panel
4. Cleaning agent injection hose
5. Detergent valve
6. Cable reel for the power supply cable
7. Storage for trigger gun with safety catch and lances
8. Pump outlet / high-pressure hose connection
9. Feed line water inlet, water hose connection
10. Water inlet filter
11. Storage bin for accessories
12. Integrated trolley takes rough ground in its stride
13. Locking brake
14. Large removable caps
15. Filler aperture for fuel
16. Drain plug for fuel
17. Hose drum with 20 m steel weave high-pressure hose

This is what you have purchased: therm-RP 900 T with hose drum

1. Kränzle high-pressure cleaner therm-RP 900 T
2. Trigger gun with safety catch and plug coupling
3. Stainless steel lance with flat jet nozzle and quick release coupling
4. Water inlet filter
5. Operating manual, Spare parts list

Construction: Operating panel

The therm-RP-series provides a clear operating panel. Please see the construction scheme for more details.

• 1. Master switch (appliance ON-OFF)
• 2. Heating switch (burner ON/OFF)
• 3. Short operating manual
• 4. Pressure gauge (water pressure)
• 5. Digital thermostat for adjusting water temperature
• 6. Pressure gauge (fuel pressure)

Construction: Interior fittings

The devices of the therm-RP-series are cold and hot water high-pressure cleaners. They offer many functions and electronics inside the high-pressure cleaners. Please see the construction scheme for more details.

• 1. Pump head made of special brass
• 2. Infinitely variable pressure and quantity regulation
• 3. Water tank
• 4. Exhaust gas outlet
• 5. Combustion chamber
• 6. Fan with fuel pump
• 7. Fuel filter
• 8. Connecting hose between high-pressure pump and water tank
• 9. High-voltage ignition transformer
• 10. Display of the excess temperature sensor
• 11. Flow-Safety-Block

General rules

Intended use

This high-pressure cleaner is to be used solely for high-pressure water jet cleaning applications without detergents or low-pressure cleaning work with detergents (e.g., with a foam injector or washing brush).

Environmental, refuse disposal, and water protection regulations must be observed!

Inspections

The high-pressure cleaner was finally inspected by the company Kränzle (refer to Kränzle final report). The high-pressure cleaner must be inspected according to the “Guidelines for Liquid Spray Devices” at least once every 12 months by a qualified person to ensure continued safe operation. The results of the inspection are to be recorded in writing (see "Inspection reports" in this operating manual).

High-pressure cleaners used for commercial purposes have to be checked by a qualified person at least every 12 months!

The owner is to ensure that all safety-relevant components are in a serviceable condition before the high-pressure cleaner is used.

Accident prevention

The high-pressure cleaner is designed to prevent accidents if used correctly. The user is to be notified of the risk of injury from hot machine parts and the high-pressure jet. The “Guidelines for Liquid Spray Devices" must be complied with.

• During the combustion process: Air is needed and exhaust gas emerges. If the high-pressure cleaner is operated in a confined space, precautions must be taken to safely exhaust the fumes. Furthermore, sufficient ventilation must be provided.
• Never shut the exhaust gas outlet on top of the high-pressure cleaner. Never stoop over this aperture and never reach into it. Emerging gases are extremely hot!

Oil change

The first oil change should be carried out after approximately 50 operating hours, then every year or after 500 operating hours. If the oil turns grey or white, you must change the oil.

Procedure:

1. Remove the large right-hand hood of the high-pressure cleaner.
2. Unscrew the oil dipstick from the gearbox housing.
3. Place a container under the gearbox and then remove the oil drain plug on the underside of the gearbox housing.
4. Collect the oil in a container and dispose of it in accordance with regulations.
5. Once the oil has been completely drained, screw the oil drain plug back into the gearbox and fill in new oil through the opening of the oil dipstick.
6. Finally, screw the dipstick back in.

New oil: 0.6 l Kränzle High Performance Gear Oil (Item no.: 400932)

Oil leakage: If oil leaks, contact your nearest after-sales service (dealer) at once. Failure to observe this instruction may cause damage to the environment and/or the transmission gearbox.

In case of increased humidity or fluctuations in temperature, condensed water may form. If the oil turns grey or white, you must change it.

Decalcifying

Calcified heat exchangers use unnecessary energy because water heats slowly and the excess pressure valve feeds part of the water back into the high-pressure pump circuit. Calcified heat exchangers are identified by increased pipeline resistance.

To check pipeline resistance: Disconnect the lance from the trigger gun with safety catch and switch on the high-pressure cleaner. A full jet of water emerges from the gun. The high-pressure cleaner must be decalcified if the pressure shown on the stainless steel pressure gauge is greater than 50 bar.

Decalcify high-pressure cleaner as follows:

1. Decouple the lance from the trigger gun with safety catch and decalcify it separately.
2. Put the detergent injector hose in a container with descaling agent.
3. Set the detergent valve to the highest concentration.
4. Set the high-pressure cleaner to "ON" using the main switch.
5. Hold the gun in a separate container and press the trigger gun with safety catch.
6. Wait until descaling agent escapes at the trigger gun with safety catch (recognizable by a whitish color).
7. Switch the high-pressure cleaner to "OFF" using the main switch and let the descaling agent work for 15-20 minutes.
8. Switch the high-pressure cleaner to "ON" again using the main switch and rinse for two minutes using clear water.
9. Check if the flow resistance has a lower value. If necessary, repeat the decalcification process.

Caution: Decalcifiers are caustic! Observe the instructions for usage and accident prevention. Wear protective clothing to prevent the decalcifying agent from contacting your skin, eyes, and clothing.

Fuel System

Your fuel may contain particles of dirt, impurities, or water, which may get into the tank during refueling. To protect the fuel pump, the high-pressure cleaner is equipped with a fuel filter. Check it regularly for dirt and exchange if applicable.

Check the tank for impurities on a regular basis. Clean the tank when necessary. Empty the fuel tank using the drainage screw at the bottom of the tank. Clean the tank and fuel pipes thoroughly. Screw the drainage screw back in.

Detergent and dirty fuel must be disposed of responsibly.

Check fuel system for dirt regularly. No warranty is assumed for damage to the fuel system because of dirt.

The laws and regulations shall be observed and met by the operator.

Functional details

Thermostat

The thermostat controls the spray water temperature. After switching on the device, "888" appears in both displays for approximately 1 second as a test of the display's functionality. The thermostat also monitors the minimum fuel level in the tank with a floating switch. If the level is below the minimum amount, the thermostat switches the oil burner off, and the "OIL" sign flashes in the set temperature display (Pos. 1). If the unit displays "FLA" in the upper display, a malfunction in burning exists.

The thermostat has two operating modes:

1. Temperature mode: This mode is always activated when the unit is switched on or can be selected using the "°C" button (Pos. 5). The red LED above the "°C" button and next to the set temperature display lights up. The desired "Set" temperature is set using the two buttons (+/-, Pos. 3+4) and can be read in the upper display (Pos. 1). Pressing the button for a longer time quickly adjusts the set temperature in 5 °C increments. The last set value is stored after the unit is switched off and is available again immediately after switching back on. The current spray temperature can be read from the bottom display (Pos. 2).
2. Percentage mode: This mode is activated by pressing the "%" button (Pos. 6). The yellow LED above the "%" button and next to the set temperature display flashes. In temperature mode ("°C"), the water temperature is measured at the outlet of the heater, and the heater is switched on and off according to the desired temperature. Due to the large amount of water in the heating coil, it takes time for the temperature sensor to register the burner's activation and for the desired temperature to be reached. This can cause the temperature to increase far above or fall far below the desired value. The innovative percent mode allows the user to specify the heater's switching duration in percent using the "+" and "-" buttons (Pos. 3+4) (100% being the maximum temperature), rather than setting the desired temperature. The result of the setting must be checked using the "Actual" temperature display. If the desired temperature has not yet been reached, the percentage must be increased. By setting percentages of the heating duration, the high-pressure jet's temperature is kept constant within a narrow range. The last value set is also saved after the unit is switched off in percent mode.

Operating hour meter: The cleaner is equipped with an operating hour meter. If during normal operation the "°C" or "%" button is actuated for more than 2 seconds, the operating time of the pump is displayed for 5 seconds, followed by the combustion time for 5 seconds. Thereafter, the display shows the original values again. While operating hours are displayed, no further inputs on the monitor are possible.

The operating time is displayed in hours [h] either in the "TARGET" or in the "ACTUAL" window. The 1000 and 100 hours are displayed in the "TARGET" window, and the 10, 1, and 1/10 hours in the "ACTUAL" window:

Pump operating time: Target-Display: P9999.9, Actual-Display: 99.9 for 9,999.9h

Combustion time: Target-Display: F9999.9, Actual-Display: 99.9 for 9,999.9h

e.g.: F00 27.3 = Combustion time 27 hours and 18 minutes

Adjusting ignition electrodes

For a smooth ignition, the setting of the ignition electrode must be controlled regularly.

Excess temperature sensor

As an additional safety device, the high-pressure cleaner is equipped with an excess temperature sensor inside the chimney. Should safety devices, such as the float monitoring device, be defective and the burner continues to heat although the heating coil does not conduct heat away, destruction of the heating coil would be inevitable. As soon as the temperature inside the chimney exceeds 260 °C, the excess temperature release triggers and cuts out the appliance. The display of the excess temperature sensor is located on the back of the switchbox inside the high-pressure cleaner.

Trouble shooting excess temperature: See chapter "Small repairs - do it yourself!" in this operating manual.

Attention! Immediately contact our service in case of recurrence.

Heat exchanger

Water is forced through a heating coil by the high-pressure pump. The fuel pump sucks fuel oil from the fuel tank via a fuel filter and transports it to the injection nozzle. The heat exchanger is heated by a high-pressure fan heater. A ventilator draws cold, fresh air from the bottom end of the high-pressure cleaner and forces it upwards between the outer mantle and the inner mantle. This pre-heats the fresh air and cools the outer mantle of the heat exchanger. The pre-heated air is pressed through a mixing unit, where finely atomized fuel is injected via a nozzle and mixed with air. Electrodes located below ignite the fuel-air mixture. The flame burns from top to bottom, turns around, and the hot gas flows past the heating coil on its way back up. The burned gases collect in the exhaust chamber and are emitted from the exhaust gas outlet.

• 1. Exhaust gas outlet
• 2. Mixing unit and nozzle
• 3. Electrodes
• 4. Inner cladding
• 5. Outer cladding
• 6. Fuel filter
• 7. Fuel pump
• 8. Heating coil
• 9. Fan

Functional details

Please note: Lack of water

Lack of water occurs more often than you probably believe. The more powerful a high-pressure cleaner is, the greater the danger that a lack of water occurs. If there is only an insufficient amount of water available, cavitation (water-gas mixture) arises inside the high-pressure pump, which is normally noticed too late or not at all. The high-pressure pump will be destroyed. Please check the available quantity of water by filling a bucket with a liter scale for one minute.

Required minimum quantity of water: (see technical data).

If the metered quantity of water is too small, you have to use a different water connection, guaranteeing the necessary output. Lack of water leads to accelerated wear of the joints (no warranty).

Never let the high-pressure pump run dry for more than 60 seconds.

Water supply

Please pay attention to the regulations of your waterworks company! In accordance with DIN EN 61770, the high-pressure cleaner may not be directly connected to the public drinking water supply lines. A brief connection is permissible according to DVGW (German Association for Gas and Water Affairs) if a non-return valve with tube ventilator (Kränzle item no.: 410164) is built into the water supply. Once the water has passed through the non-return valve, it is no longer considered drinking water. Indirect connection to the public drinking water supply lines is also permissible by way of free emission in accordance with EN 61770; e.g., by using a reservoir with a float valve. Direct connection to a non-drinking water supply line is permissible.

Insufficient quantity of electricity

If too many collectors in your proximity are connected to the network at the same time, the available voltage and current intensity may decline. Consequently, the motor of the high-pressure cleaner may not start or may blow. The power supply may also be insufficient if the power supply cable is too long or too thin. If extension cables are too long, this may lead to a voltage drop causing malfunctions or start-up difficulties.

Check the line fusing and have the voltage and available current intensity checked by an expert in case of uncertainty (see technical data).

Electrical connection

The machine is supplied with a power supply cable. The mains plug must be fitted to a standard grounded socket with a 30 mA residual current operated device. Connection to the mains must be carried out by a properly trained electrician and must comply with the requirements of IEC60364-1. The socket must be protected with a 16 A fuse on the mains side. When using an extension cable, it must have an earthed lead properly connected to the socket. The conductors in the extension cable must have a minimum cross-section of 1.5 mm². Plug connections must be of a spray-proof design and may not be located on a wet floor. For extension cables longer than 10 m, the minimum cross-section must be 2.5 mm²! When using a cable drum, the power supply cable must always be unwound completely.

Functional details

Water and cleaning system

Water can be connected at mains pressure to the high-pressure pump. A float valve in the water tank regulates the water inlet. The water is then sucked by the high-pressure pump from the water tank and supplied to the lance under pressure. The high-pressure jet is formed by the nozzle at the end of the lance.

Environmental, refuse disposal, and water protection regulations must be observed!

Safety jet pipe with safety trigger gun

The high-pressure cleaner can only be operated when the trigger of the safety deactivation trigger gun is actuated. When the trigger is pulled, the safety trigger gun opens, and the liquid is transported to the nozzle. The spray pressure increases and quickly reaches the operating pressure. When the trigger is released, the safety trigger gun closes, and any further spraying of liquid from the safety jet pipe is prevented. The increase in pressure when the safety trigger gun is closed causes the pressure control valve-safety valve to open. The motor is switched off by the pressure switch. When the safety trigger gun is opened, the pressure control valve/safety valve closes, the motor starts, and the high-pressure pump resumes pressure spraying from the safety jet pipe with the selected operating pressure.

• The safety trigger gun is a safety device. Repairs should only be performed by qualified persons. Should replacement parts be required, use only components authorized by the manufacturer.

Pressure control valve/safety valve

The pressure control valve/safety valve protects the high-pressure cleaner from a build-up of excess pressure and is designed not to permit an excess pressure to be selected for operation. The limit nut on the handle is sealed with a spray coating. The operating pressure and spray rate can be steplessly adjusted by turning the handle.

• Replacements, repairs, new adjustments, and sealing should only be performed by qualified persons.

Motor protection switch

The motor is protected against overload by a motor protection switch. In case of motor overload or blocking, the motor of the high-pressure cleaner switches off automatically. If the motor tends to switch off repeatedly, detect and remedy the cause of the failure.

• Replacements and inspection work should only be performed by qualified persons when the high-pressure cleaner is disconnected from the power supply, i.e., with the plug pulled out from the electrical socket.

Total stop system with delayed motor cut-off

When opening the trigger gun, the motor starts via a total-stop system. When closing the trigger gun, the motor is switched off only after 38 seconds, and the device enters standby mode. The delayed switch-off is necessary because frequently switching motors on and off on high-pressure cleaners of this size may involve heavy load on the power network and cause increased wear of internal electrical parts. After 20 minutes in standby, the device disconnects from the mains and must be turned on again by the main switch. The machine restarts automatically when the gun is re-opened, provided that the master switch is on.

Putting into operation

Safety shutdown

If the high-pressure cleaner is accidentally not turned off after use or the trigger gun with safety catch is not used for 20 minutes, the high-pressure cleaner automatically enters a safety state by deactivation. Operating the main switch once more reactivates the device.

High-pressure hose and spray device

The high-pressure hose and spray device, which are part of the therm-1-series equipment, are made of high-quality material and engineered to conform with the operating conditions of the high-pressure cleaner and are duly labeled.

• If replacement parts are required, only parts authorized by the manufacturer may be used. The warranty is automatically void if spare parts from third-party providers are used! The high-pressure hose and spray device must be connected in a pressure-tight manner (without leakage).
• The high-pressure hose may not be driven over, pulled excessively, or twisted. The high-pressure hose may under no circumstances be pulled over sharp edges. Defective high-pressure hoses must not be repaired (acc. to DIN 20022) but must be replaced by new hoses approved by the manufacturer.
• Prior to putting the high-pressure cleaner into operation, make sure that all safety instructions are observed.

Putting into operation steps:

1. Install the water inlet filter at the water inlet.
2. Prior to putting into operation, fill fuel oil into the fuel tank (fuel oil EL DIN 51 603 or diesel fuel DIN EN 590). Filling quantity: 25 liters.
3. For moving the high-pressure cleaner to the place of use, please release the locking brake. The high-pressure cleaner must not be pulled with a connected water supply hose!
4. The therm-RP-series is a movable high-pressure cleaner with sturdy trolleys, ideally suited for difficult terrain. For steering the high-pressure cleaner, put your foot against the tipping support and then pull the device towards you.

Usage as a cold water high-pressure cleaner

1. Detergent valve must be closed.
2. Switch on high-pressure cleaner with opened trigger gun (trigger pulled). Bleeding of the high-pressure cleaner: Pull and release the trigger of the trigger gun with safety catch several times. Start with cleaning process.
3. When starting the cleaning process, do not aim the water jet towards the object you want to clean for at least 30 seconds. Maybe the water inside the combustion chamber has changed color due to the rest time.

Usage as a hot water high-pressure cleaner

1. Detergent valve must be closed.
2. Switch on high-pressure cleaner with opened trigger gun (trigger pulled). Bleeding of the high-pressure cleaner: Pull and release the trigger of the trigger gun with safety catch several times.
3. Set desired temperature at the thermostat. (Min. temperature 40 °C). On the subject of thermostat settings, see chapter "Functional details" in this operating manual.
4. Switch on the heater switch. The water is heated up and constantly kept at the set temperature. Start with cleaning process.

During high-pressure operation (above 30 bar), the temperature may not exceed 90 °C.

In steam mode (90 - 150 °C), the operating pressure must be 50 bar! To reach the steam stage (water temperature above 90 °C), regulate the operating pressure to 50 bar and set the desired temperature up to a maximum of 150 °C using the thermostat.

Applying additives

Suction of additives

Due to the water tank fitted to the therm-RP-series, it is now possible to directly suck the detergent into the high-pressure pump, thus reducing output loss and increasing efficiency considerably.

1. Place the chemicals filter into the container with additives.
2. Dosing of detergent is done by turning the detergent valve.
3. By closing the detergent valve, the supply of detergent is stopped.

Only open the dosing valve if the detergent sieve is placed in a liquid! Sucked air leads to destruction of the pump seals of the high-pressure cleaner (No warranty)!

The additive must have a neutral pH value of 7-9. This machine has been designed for use of cleaning agents supplied or specifically recommended by the manufacturer. The use of other cleaning agents or chemicals may impair the safety of the machine. Observe and comply with relevant regulations, e.g., directives governing protective equipment, waste-water regulations, etc.

Attention solvents! Never suck in liquids containing solvents like varnish solvents, petrol, oil, or similar liquids! Seals inside the high-pressure cleaner are not resistant to solvents! The spray mist of solvents is highly inflammable, explosive, and poisonous.

Taking out of operation

1. Switch off the high-pressure cleaner.
2. Cut off the water supply.
3. Open the safety trigger gun catch briefly until the pressure is released.
4. Apply safety catch on the trigger gun.
5. Remove high-pressure hose and safety trigger gun.
6. Emptying high-pressure pump: Hold high-pressure hose and switch motor on until the water jet stops escaping at the outlet.
7. Pull the plug from the socket.
8. Clean high-pressure hose and wind up without loops; fix hose drum.
9. Clean and wind up the power supply cable.
10. Clean the water inlet sieve.
11. Apply locking brake.
12. Store high-pressure cleaners in frost-free rooms in winter.

Frost protection

For protecting the high-pressure cleaner against frost, please empty it completely. Separate the high-pressure cleaner from the water supply and switch it on. By opening the safety trigger gun, the high-pressure pump presses water out of the water tank. However, do not allow the high-pressure cleaner to operate without water for more than one minute. Fill the anti-freeze agent into the water box and turn on the high-pressure cleaner. Wait with the gun opened until the agent spurts out of the nozzle.

Particular rules, directives and inspections

Inspections performed by Kränzle

• Measurement of earth line resistance
• Measurement of voltage and current
• Inspection of tension consistency with +/- 1530 V
• Pressure check of heating coil at 300 bar
• Visual and functional check as per the inspection sheet provided
• Exhaust fume analysis (see test strips provided)

Guidelines for liquid sprayers

The machine conforms with the "Guidelines for liquid sprayers". These guidelines are issued by the organization of trade associations and may be obtained from Carl Heymann-Verlag KG, Luxemburger Str. 49, 50939 Köln. These guidelines specify that this machine is to be inspected by qualified personnel whenever necessary, but no less than once every 12 months. These inspections must be recorded in the inspection log at the end of this manual.

Pressure container and steam boiler directives

Kränzle high-pressure cleaning equipment conforms to the pressure container and steam boiler directive. No construction approval, notification of license, and takeover inspection are required. The water capacity is less than 10 l.

Duties of owner

The owner is to ensure that all safety-relevant components are in a serviceable condition before the sprayer is used (e.g., safety valves, hose, and electric cables, spray equipment, etc.).

Emission control legislation

With stationary installation, the emission levels of the machine must be checked once a year by a qualified organization or person according to German law. The first inspection must be carried out four weeks after the machine is commissioned. The owner is responsible for having the inspection performed.

Care and Maintenance

Important: The machine must be disconnected from the power supply when servicing work is being carried out. The main switch should be in position "O" and the plug out of the socket.

Weekly, or after approx. 50 hours of operation:

• Oil level: Check the oil level of the high-pressure pump at the oil gauge rod. If the oil level is too low, top up oil. The oil level must be readable between the first and second marks. (Oil change - see chapter "General rules" in this operating manual. Change the oil if it has a grey or whitish appearance. The oil should be disposed of responsibly.)
• Water filter and fuel filter: Check the water filter in front of the float valve in the water tank and the fuel filter in front of the solenoid valve. Clean the filters if necessary.

Yearly, or after approx. 500 hours of operation:

• Desulphurise and decarbonize the heating coil.
• Check heating coil for calcification; decalcify if necessary.
• Check the oil burner and ignition system.
• Clean the oil nozzle, oil filter, solenoid valve, and filter; clean and adjust the ignition transformer, ignition cable, and ignition electrodes; and replace defective parts.
• Change the oil.

Oil leakage: If oil leaks, contact your nearest after-sales service (dealer) at once. (Environmental damage, damage to the transmission).

In case of increased humidity or fluctuations in temperature, condensed water may form. If the oil turns grey or white, you must change it.

Small repairs - do it yourself

Problem: No water from nozzle although the high-pressure cleaner is running. The stainless steel pressure gauge shows full pressure.

Cause: Most likely the nozzle is blocked.

The stainless steel pressure gauge shows full pressure, but from the nozzle comes only little water or no water at all. (Inside the stainless steel pressure gauge is no water but a filling with glycerin to damp the vibration of the pointer.)

Proceeding:

1. Switch off the high-pressure cleaner. Pull the plug from the socket. Operate the safety trigger gun catch several times to decrease the pressure.
2. First remove the trigger gun with safety catch and the lance and flush the high-pressure hose clear of potential residues.
3. Check water inlet filter for soiling.
4. If the problem still exists, take a wire (paper clip) and push through the nozzle opening. If this procedure is not successful, the nozzle has to be replaced.

Problem: Irregular jet from nozzle. The stainless steel pressure gauge shows low pressure.

Cause: Most likely the valves are soiled or sticky.

The stainless steel pressure gauge shows low pressure despite fully turned-up pressure regulation. The water from the lance comes in spurts. The high-pressure hose vibrates. (Inside the stainless steel pressure gauge is no water but a filling with glycerin to damp the vibration of the pointer.)

Proceeding:

1. Unscrew all 6 valves, one after the other (hexagonal brass screws, 3 in a row, vertically and horizontally).
2. Take out the valve body and O-ring by means of needle nose pliers. Check the O-ring for damage. If damaged, the O-ring has to be replaced.
3. Take a wire (paper clip) and clean the valves under running water.
4. Do not forget the O-ring during reassembly!

Problem: After closing the safety trigger gun, the high-pressure cleaner keeps switching on and off. The stainless steel pressure gauge continuously displays full pressure.

Possible cause No. 1: Leakage.

Having closed the trigger gun with safety catch, the high-pressure cleaner must shut down, and the stainless steel pressure gauge must show the permitted deactivation pressure (see rating plate). If not shut down and the stainless steel pressure gauge continuously shows full pressure (device does not switch to bypass), this could be due to leakage at the high-pressure pump, at the pressure switch, at the high-pressure hose, or at the trigger gun with safety catch.

Proceeding:

1. Check connections from the high-pressure cleaner to the high-pressure hose and from the high-pressure hose to the safety trigger gun, and also the connection between the lance and safety trigger gun for tightness.
2. Switch off the cleaner. Shortly press the trigger of the trigger gun with safety catch to decrease the pressure. Remove the high-pressure hose, trigger gun with safety catch, and lance, and check the O-rings. If the O-rings are damaged, they have to be replaced.

In case of a leakage, there is no guarantee for possible consequential damages.

Possible cause No. 2: The non-return valve is defective.

Proceeding:

1. Switch off the high-pressure cleaner and pull the plug from the socket. Stop the water supply.
2. Operate the safety trigger gun catch several times to decrease the pressure.
3. Unscrew the pump outlet.
4. Remove the check body and check the O-ring for soiling or damage. Also check the seal seat inside the pump housing for soiling or damage.
5. If sealing rings are defective, replace the O-rings at once.

There is no guarantee if the high-pressure pump is damaged by defective O-rings due to air induction or lack of water (cavitation).

Summary of additional causes of malfunction

Water supply

• Problem: Water tank runs over. Possible cause: Float valve is dirty/defect.
• Problem: Water tank does not fill completely. Possible cause: Float valve is defect, water inlet filter dirty, water intake too low.
• Problem: High-pressure pump does not suck. Possible cause: Valves sticky or dirty, suction hose leaks, detergent valve is open or leaks, check hose connections, high-pressure nozzle is clogged.
• Test: Check water and additive suction system for tightness.
• Problem: High-pressure pump makes lots of noise. Possible cause: Check suction connections and high-pressure nozzle, check O-rings and valves, check sleeves. Unloader: Check stainless steel seat and ball. Check seals on the control piston. Replace sleeves in the high-pressure pump. Replace O-rings.
• Problem: Water drops from the high-pressure pump. Possible cause: High-pressure nozzle washed out, stainless steel seat, ball, O-ring in unloader is dirty or defect.
• Problem: Pressure is too low. Possible cause: High-pressure pump sucks air, check suction connections and high-pressure nozzle, check O-rings and valves, check sleeves. Unloader: Check stainless steel seat and ball. Check seals on the control piston. Replace sleeves in the high-pressure pump. Replace O-rings.

High-pressure cleaner start/stop

• Problem: High-pressure cleaner does not switch off. Possible cause: Check return body and O-ring in unloader of the valve housing. Test: Jumper pressure switch, check pressure switch, check micro switch, check cable connections.
• Problem: High-pressure cleaner does not start or stops during operation. Possible cause: Check electricity supply, check main switch, check cable connections, board is defect. Switch off by overcurrent release. Check micro switch.

Leakage

• Problem: Trigger gun with safety catch drips. Possible cause: Gun defective. Let repair.
• Problem: High-pressure hose drips. Possible cause: Replace seals. Replace O-ring under screwed connection.
• Problem: Stainless steel pressure gauge shows pressure but no water comes out. Possible cause: Clean high-pressure nozzle.

Sucking detergent

• Problem: Detergent is not sucked. Possible cause: High-pressure pump sucks air. Check hose clips. Test: Connect water line to the high-pressure pump. No water must come from the detergent hose.

Oil drops from the transmission

Check/replace oil seals. Check plunger and plunger guides.

Displayed malfunctions

Excess temperature

High-pressure cleaner turns off on its own.

Überhitzung / Overheating

Red: Overtemperature tripped, let the device cool off. Hot-water operation not possible.

Yellow: Device cooled off, activation of hot-water operation possible by pushing the RESET button.

Attention: Call customer service if repeating!

There is an overpressure sensor on the rear of the control cabinet inside the high-pressure cleaner.

Heating (burner)

• Problem: Fuel pump/fan operates, but burner does not heat. Possible cause: Set water temperature is reached. Increase temperature on thermostat. Open trigger gun with safety catch until temperature drops. Fuel filter/fuel nozzle is dirty.
• Problem: Fuel pump/fan does not operate. Possible cause: Coupling between burner motor and fuel pump is defect. Fan/fuel pump motor is defect. Check electrical equipment. Check fuse in electric box.
• Problem: Fuel pump makes loud noises. Possible cause: Water in fuel tank. Dirt or rust in the fuel pump. Clean tank. Replace fuel pump.
• Problem: Smoke during operation or after switching off. Possible cause: Fuel is dirty. Nozzle or nozzle stock leaks. Water in tank.
• Problem: Solenoid valve on the fuel pump does not open. Possible cause: Check pressure switch (black). Solenoid valve is defect or dirty. Clean filter, connections, and fuel pump. Setting is wrong. Clean or replace fuel nozzle.
• Problem: Ignition does not function. Possible cause: Check ignition cable. Charring of plug-in contacts by moisture. Cable is broken. Check ignition transformer connections. Transformer is defect, ignition electrode has been falsely set or burnt up.
• Problem: Ventilator does not operate. Possible cause: Fan-/fuel pump motor is defect. Check electrical equipment. Check fuse in terminal box. Coupling between burner motor and fuel pump is defect.

Kränzle Zubehör (Accessories)

Rotating washing brush

• Stainless steel pipe
• 1000 mm
• Brush head Ø 180 mm
• Nozzle size 3.2 mm
• With plug-in nipple
• Ord. no.: 410507

Underbody lance

• Stainless steel pipe
• 1000 mm
• Nozzle system 4007
• With anti-twist protection
• With plug-in nipple
• Ord. no.: 410755

Double lance

• With insulated ISO handle
• 1000 mm
• Low pressure nozzle D3035 as standard
• With plug-in nipple
• Ord. no. double lance: 12133
• *Please order high-pressure nozzle separately.

The high-pressure cleaner accessories are safety components! Any warranty will be void if parts not authorized by Kränzle are used.

Foam lance

• 1 litre, with container
• With plug-in nipple
• Ord. no.: 135303

Splash guard

• L: 280 mm x W: 190 mm
• For all washing lances
• Ord. no.: 132600

Suction hose

• with suction filter
• With return valve
• Hose length 3 m
• Ord. no.: 150383

Please indicate the technical data of the high-pressure cleaner (device type) when placing your order.

EU Declaration of Conformity

We hereby declare that the design of the high-pressure cleaners: therm-RP 900 T complies with the following guidelines and their amendments for high-pressure cleaners:

• Machinery Directive 2006/42/EC
• EMC Directive 2014/30/EU
• ROHS Directive 2011/65/EU
• Outdoor Directive 2000/14/EC

Nominal flow: therm-RP 900 T: 900 l/h

Technical specifications available from: Fa. Josef Kränzle GmbH & Co. KG, Manfred Bauer, Rudolf-Diesel-Str. 20, 89257 Illertissen

Noise pressure level, typical: 86 dB (A)

Noise pressure level, guaranteed: 88 dB (A)

Applied conformity assessment procedure: Annex V, Outdoor Directive 2000/14/EC

Applied specifications and standards: EN 60335-1: 2012/A13: 2017, EN 60335-2-79: 2012, EN 62233: 2008, EN 55014-1:2006+A1:2009+A2:2011, EN 55014-2: 2015, EN 61000-3-2: 2014, EN 61000-3-3: 2013

Josef Kränzle GmbH & Co. KG
Rudolf-Diesel-Straße 20
89257 Illertissen (Germany)

Illertissen, 2019-04-05

Ludwig Kränzle (Managing director)

Warranty

The warranty obligation of Josef Kränzle GmbH & Co. KG towards the dealer from whom you have purchased this Kränzle high-pressure cleaner (= product) applies to material faults only, such as material and manufacturing defects.

Defects attributable to long and frequent use of the product, typically arising due to the age of the high-pressure cleaner and intensity of its use, are defined as normal wear in respect of product components. Purchaser's rights to assert claims for such defects are ruled out. Parts subject to wear include in particular the pressure gauge, nozzle, valves, sleeves, high-pressure hose, and spray equipment.

The product is to be operated in conformity with this operating manual. The operating manual is deemed to be part of the warranty provisions.

Any changes made to the safety devices of the product or instances of maloperation – such as exceeding the temperature and speed limits, undervoltage, insufficient water supply, and sewage water, or failure to use the product for the intended purpose – may result in damage occurring to the product. Such damage is not deemed to constitute any material defect.

Should the use of accessories or spares other than original Kränzle component parts and original Kränzle replacement parts be the cause of defects on our product, this may lead to all warranty claims becoming null and void. Only the use of original Kränzle replacement parts matching the relevant Kränzle high-pressure cleaner provides adequate assurance for safe and trouble-free operation of the Kränzle high-pressure cleaner.

With regard to legal warranty claims, the limitation periods of the respective countries shall apply.

Where warranty claims apply to any other defects, please contact your local dealer, presenting the accessories together with your purchase receipt, or the nearest authorized service center. This can also be found on the internet under www.kraenzle.com.

Inspection reports

High-pressure cleaners for industrial use have to be checked by an expert every 12 months! Inspection report on annually carried out Labour Safety Inspection (UVV) according to the Guidelines for Liquid Spray Equipment. (This inspection sheet serves as proof for the completion of the retest and must be kept carefully!)

Kränzle-test seals: Ord. no.: UVV200106

Owner: Address:

Type: Serial no.: Repair order no.:

Scope of inspection

Inspection data

Inspection result (check)

• The high-pressure cleaner was checked by an expert according to the Guidelines for Liquid Spray Equipment. The defects found have been rectified so that the Labour Safety can be confirmed.
• The high-pressure cleaner was checked by an expert according to the Guidelines for Liquid Spray Equipment. The Labour Safety cannot be confirmed unless the defects found are rectified by repair or replacement of the faulty parts.

The next retest according to the Guidelines for Liquid Spray Equipment has to be carried out by: Month Year Place, Date Signature

Kränzle Final report

High-pressure cleaner (device type)/Hochdruckreiniger (Gerätetyp):

Inspector/Prüfer: Date/Datum: Signature/Unterschrift:

Made
In
Germany

Josef Kränzle GmbH & Co. KG
Rudolf-Diesel-Straße 20
89257 Illertissen (Germany)

sales@kraenzle.com

www.kraenzle.com

© Kränzle 29.07.2024 / Ord.-no.: 307740/subject to technical modifications and errors.