Karcher NT Series Wet/Dry Vacuum Cleaners

General Information and Safety

Before first use, read this original manual and the accompanying safety instructions (No. 59562490, edition 07/19). Follow these documents and keep them for future reference.

Failure to comply with the manual or safety instructions can lead to equipment damage and hazards for the operator and others.

Report any transport damage to your dealer immediately. Check package contents for missing accessories or damage.

Environmental Protection

Packaging materials are recyclable. Dispose of packaging in an environmentally friendly manner.

Electrical and electronic equipment contains recyclable materials and potentially hazardous components. Equipment marked with this symbol should not be disposed of with household waste.

Substance Information (REACH)

Updated information on contained substances can be found at: www.kaercher.de/REACH

Intended Use

This wet/dry vacuum cleaner is designed for removing dry dirt and liquids.

The equipment is suitable for vacuuming dry, non-flammable, and health-hazardous dusts up to dust class L according to EN 60335-2-69. Limitation: Carcinogenic substances must not be vacuumed.

This equipment is suitable for industrial use, e.g., in hotels, schools, hospitals, factories, shops, offices, and rental businesses.

For Switzerland only: The power socket should only be used in a dry environment during service.

Equipment Description

Refer to Figure A for component identification:

• (1) Electrodes
• (2) Suction tube connection
• (3) Suction hose
• (4) Push handle hook
• (5) Push handle locking mechanism (NT 50/1 only)
• (6) Crevice nozzle
• (7) Working air outlet
• (8) Suction head
• (9) Suction head closure
• (10) Retractor
• (11) Dirt container
• (12) Swivel castor
• (13) Carrying handle (NT 50/1 only)
• (14) Motor cooling air intake
• (15) Floor nozzle
• (16) Suction pipe
• (17) Tool box stop
• (18) Rubber sleeve, screwable
• (19) Securing lug
• (20) Filter cover
• (21) Carrying handle
• (22) Suction control (stepless)
• (23) Tool adapter (Ap Te L only)
• (24) Push handle (NT 50/1 only)
• (25) Filter cleaning button
• (26) Rotary selector switch
• (27) Power socket (Ap Te L only)
• (28) Floor nozzle holder
• (29) Drain hose (NT 50/1 only)
• (30) Suction pipe holder
• (31) Cable holder (NT 50/1 only)
• (32) Bend
• (33) Mains cable
• (34) Bend holder (NT 30/1, NT 40/1 only)
• (35) Filter frame
• (36) Flat pleated filter (PES)
• (37) Filter cleaning
• (38) Rating plate

Symbols on the Equipment

Dust Type: The equipment is suitable for dust class L.

WARNING: This equipment contains health-hazardous dust. Only trained persons with appropriate protective equipment should perform emptying and maintenance tasks, including dust bag removal. Do not connect until the complete filter system is installed.

Main Filter Elements

Flat pleated filter (cellulose): Order No. 6.904-367.0

Flat pleated filter (PES): Order No. 6.907-662.0

Flat pleated filter (PTFE): Order No. 6.907-455.0

Flat pleated filter (PTFE H): Order No. 6.907-671.0

Candle filter: Order No. 2.414-000.0

Preparation

1. Unpack the equipment and assemble accessories. (Figure B)

Commissioning

WARNING

Hazard from health-hazardous dust: Respiratory diseases from dust inhalation. Never vacuum without a filter element, as this increases the health risk due to increased fine dust emission.

CAUTION

Hazard from fine dust ingress: Risk of damage to the suction motor. Never remove the main filter element during vacuuming.

Antistatic System

Only on equipment with integrated power socket: The grounded connection coupling diverts static charges, preventing spark formation and electric shocks with conductive accessories (optional).

Dry Vacuuming

• NT 30/1: Equipped with a felt filter bag with sealing cap, order No. 2.889-154.0 (5 units).
• NT 40/1, NT 50/1: Equipped with a felt filter bag with sealing cap, order No. 2.889-155.0 (5 units).

Note: This equipment can vacuum all types of dust up to dust class L.

Note: The equipment is suitable as an industrial vacuum cleaner for vacuuming non-flammable dry dust with workplace limit values greater than or equal to 1 mg/m³.

For fine dust vacuuming, a felt filter bag or a disposal bag (special accessory) can be used additionally.

Mounting the felt filter bag

1. Unlock and remove the suction head.
2. Insert the felt filter bag. (Figure C)
3. Attach and lock the suction head.

Mounting the disposal bag

1. Unlock and remove the suction head.
2. Insert the disposal bag (special accessory).
3. Cover the container with the disposal bag (special accessories). Ensure the marking line is inside the container and both ventilation openings are on the rear wall of the container.
4. Attach and lock the suction head.

Vacuuming Liquid Dirt

DANGER

Hazard from health-hazardous dust: Respiratory diseases from dust inhalation. Health-hazardous dusts must not be collected during liquid dirt vacuuming.

Note: The flat pleated filter (cellulose), order No. 6.904-367.0, is not recommended for regular liquid dirt vacuuming.

Note: The candle filter, order No. 2.414-000.0, is not suitable for vacuuming liquid dirt.

Mounting the rubber lips

1. Remove the brush strips. (Figure E)
2. Mount the rubber lips.

Note: The structured side of the rubber lips should face outwards. Observe the different lengths of the rubber lips.

Removing the felt filter bag

• Always remove the felt filter bag when vacuuming liquid dirt.

1. Unlock and remove the suction head.
2. Pull the felt filter bag upwards by the flange. (Figure F)
3. Seal the felt filter bag tightly with a sealing cap.
4. Dispose of the used felt filter bag according to legal regulations.
5. Attach and lock the suction head.

Removing the disposal bag

• Always remove the disposal bag (special accessories) when vacuuming liquid dirt.

1. Unlock and remove the suction head.
2. Pull the disposal bag (special accessories) upwards. (Figure G)
3. Seal the disposal bag (special accessory) tightly with the cable tie below the opening.
4. Remove the disposal bag (special accessories).
5. Clean the inside of the container with a damp cloth.
6. Dispose of the disposal bag (special accessories) according to legal regulations.
7. Attach and lock the suction head.

Dirty water purging

NT 50/1 only:

1. Empty the dirty water using the drain hose. (Figure H)

General

• When vacuuming liquid dirt with the crevice nozzle or upholstery nozzle (optional), especially when primarily vacuuming water from a container, it is recommended not to activate the "Semi-automatic filter cleaning" function.
• When the max. liquid level is reached, the equipment switches off automatically.
• For non-conductive liquids (e.g., oils, greases, cutting fluids), the equipment does not switch off when the container is full. Continuously monitor the fill level and empty the container in time.
• After liquid vacuuming: Clean the main filter element with filter cleaning. Clean the electrodes with a brush. Clean and dry the container with a damp cloth.

Clip Connection

The suction hose is equipped with a clip system. All accessories with a nominal width of 35 mm can be connected. (Figure I)

Operation

Connecting the Equipment

1. Plug in the mains plug.
2. Switch on the equipment using the rotary selector switch.

Working with Power Tools

Only on equipment with integrated power socket:

DANGER

Risk of electric shock: Danger of injury and damage. The socket is only for direct connection of power tools to the vacuum cleaner. Any other use of the socket is improper.

1. Plug the power tool's mains plug into the vacuum cleaner. The vacuum cleaner is in standby mode.
2. Switch on the equipment using the rotary selector switch.

Note: The vacuum cleaner switches on and off automatically with the power tool.

Note: The vacuum cleaner has a start-up delay of up to 0.5 seconds and an overrun time of up to 15 seconds.

Note: Refer to the technical data for the connection power rating of power tools.

1. Remove the bend from the suction hose. (Figure J)
2. Mount the tool adapter onto the suction hose.
3. Connect the tool adapter to the power tool. (Figure K)

Semi-automatic Filter Cleaning

Note: Actuating the filter cleaning every 5-10 minutes increases the service life of the main filter element.

Note: The semi-automatic filter cleaning can only be connected with the equipment switched on.

1. Press the semi-automatic filter cleaning button 5 times. The main filter element is cleaned by an air blast (pulse noise).
2. Power cleaning (when the main filter element is particularly dirty): Close the suction pipe or bend with your hand and press the semi-automatic filter cleaning button five times with the equipment switched on. (Figure L)

Disconnecting the Equipment

1. Press the semi-automatic filter cleaning button 5 times.
2. Switch off the equipment using the rotary selector switch.
3. Unplug the mains plug.

After Each Service

1. Empty the container.
2. Clean the inside and outside of the equipment by vacuuming and wiping with a damp cloth.

Folding/Unfolding the Push Handle

NT 50/1 only:

1. Release the push handle locking mechanism and adjust it.

Storing the Equipment

1. Store the suction hose and mains cable as shown in the figure. (Figure M)
2. Store the equipment in a dry place and protect it from unauthorized use.

Transport

CAUTION

Non-observance of weight: Risk of injury and damage. Consider the weight of the equipment during transport.

1. Remove the suction pipe with the floor nozzle from the holder. Carry the equipment by the carrying handle and the suction pipe, not by the push handle.
2. When transporting the equipment in vehicles, secure it against slipping and tipping according to current guidelines.

Storage

CAUTION

Non-observance of weight: Risk of injury and damage. Consider the weight of the equipment for storage. The equipment can only be stored indoors.

Care and Maintenance

DANGER

Risk of electric shock: Injury when touching live parts. Disconnect the equipment. Unplug the mains plug. Machines that generate dust are equipped with safety devices to prevent or resolve hazards according to DGUV Regulation 1 (German accident prevention regulations, prevention principles).

CAUTION

Detergents containing silicone: Plastic parts can be damaged. Do not use silicone-containing detergents for cleaning.

• Simple cleaning and maintenance tasks can be performed by the user.
• Regularly clean the surface of the equipment and the inside of the container with a damp cloth.

Main Filter Element

Changing the flat pleated filter

1. Open the filter cover.
2. Remove the filter frame. (Figure N)
3. Remove the flat pleated filter.
4. Dispose of the used flat pleated filter according to legal regulations.
5. Clean any generated dirt on the clean air side.
6. Clean the filter frame and its seating surface with a damp cloth.
7. Insert a new flat pleated filter. Ensure the flat pleated filter is correctly seated on all sides during installation.
8. Insert the filter frame.
9. Close the filter cover; it should audibly click into place.

Changing the candle filter

1. Open the filter cover.
2. Remove the candle filter (special accessories). (Figure O)
3. Dispose of the used candle filter (special accessories) according to legal regulations.
4. Clean any generated dirt on the clean air side.
5. Clean the seating surface of the candle filter with a damp cloth.
6. Insert the new candle filter (special accessories).
7. Close the filter cover; it should audibly click into place.

Changing the felt filter bag

1. Unlock and remove the suction head.
2. Pull the felt filter bag upwards by the flange. (Figure F)
3. Seal the felt filter bag tightly with a sealing cap.
4. Dispose of the used felt filter bag according to legal regulations.
5. Insert the new felt filter bag.
6. Attach and lock the suction head.

Changing the disposal bag

1. Unlock and remove the suction head.
2. Pull the disposal bag (special accessories) upwards. (Figure G)
3. Seal the disposal bag (special accessory) tightly with the cable tie below the opening.
4. Remove the disposal bag (special accessories).
5. Clean the inside of the container with a damp cloth.
6. Dispose of the disposal bag (special accessories) according to legal regulations.
7. Insert the new disposal bag (special accessory).
8. Cover the container with the disposal bag (special accessories). Ensure the marking line is inside the container and both ventilation openings are on the rear wall of the container.
9. Attach and lock the suction head.

Cleaning the electrodes

1. Unlock and remove the suction head.
2. Clean the electrodes with a brush.
3. Attach and lock the suction head.

Troubleshooting

DANGER

Risk of electric shock: Injury when touching live parts. Disconnect the equipment. Unplug the mains plug.

Note: If a fault occurs (e.g., filter breakage), disconnect the equipment immediately. Eliminate the fault before recommissioning.

The suction turbine does not run

1. Check the mains plug and the power supply fuse.
2. Check the mains cable, mains plug, electrodes, and if necessary, the equipment plug.
3. Connect the equipment.

The suction turbine switches off

1. Empty the container.

The suction turbine does not restart after emptying the container

1. Switch off the equipment and wait 5 seconds. Switch the equipment back on.
2. Clean the electrodes with a brush.

Suction power is reduced

1. Clear blockages in the suction nozzle, suction pipe, suction hose, or main filter element.
2. Change the full felt filter bag.
3. Change the full disposal bag (special accessories).
4. Press the semi-automatic filter cleaning button 5 times with the equipment switched on.
5. Ensure the filter cover is correctly seated.
6. Change the main filter element.
7. NT 50/1 only: Check the seal of the drain hose.
8. Only with flat pleated filters: Check/correct the correct position of the flat pleated filter. (Figure P)
9. Change the main filter element.

Automatic shut-off (liquid vacuuming) does not work

1. Clean the electrodes with a brush.
2. Continuously monitor the fill level of non-conductive liquids.

Semi-automatic filter cleaning does not work

1. Suction hose not connected.

Semi-automatic filter cleaning cannot be switched off

1. Contact after-sales service.

Semi-automatic filter cleaning cannot be connected

1. Contact after-sales service.

After-Sales Service

If the fault cannot be resolved, the after-sales service should check the equipment.

Warranty

Warranty conditions specified by the authorized dealer apply in each country. Karcher will rectify any defects free of charge within the warranty period if the cause is due to faulty material or manufacturing. For warranty claims, contact your dealer or the nearest authorized after-sales service with the proof of purchase.

Accessories and Spare Parts

Use only original accessories and spare parts to ensure safe and reliable operation of the equipment. Information on accessories and spare parts can be found at www.kaercher.com.

EU Declaration of Conformity

Karcher declares that the machine complies with the relevant EU directives regarding safety and health, including Directive 2006/42/EC (+2009/127/CE), 2011/65/UE, and 2014/30/UE.

Harmonized standards applied include EN IEC 63000:2018, EN 55014-1:2017 + A11:2020, EN 55014-2:2015, EN 60335-1, EN 60335-2-69, EN 61000-3-2:2014, EN 61000-3-3:2013, and EN 62233:2008.

Document Responsible: S. Reiser

Issued by: Alfred Kärcher SE & Co. KG, Alfred-Kärcher-Str. 28-40, 71364 Winnenden (Germany)

Date: 2020/10/01

Technical Data

Subject to technical modifications.