Read these original instructions and the enclosed safety instructions before using the device for the first time. Act in accordance with them.

Keep both books for future reference or for future owners.

• If the operating instructions and safety instructions are not observed, the device can be damaged and dangers could arise for users and other persons.

• Notify the dealer immediately in the case of shipping damage.

• Check the package contents when unpacking for missing accessories or for damage.

The packing materials can be recycled. Please dispose of packaging in accordance with the environmental regulations.

Electrical and electronic devices contain valuable, recyclable materials and often components such as batteries, rechargeable batteries or oil, which - if handled or disposed of incorrectly - can pose a potential danger to human health and the environment. However, these components are required for the correct operation of the device. Devices marked by this symbol are not allowed to be disposed of together with the household rubbish.

Current information on content materials can be found at: www.kaercher.de/REACH

• This wet/dry vacuum cleaner is designed to remove dry dirt and liquids.

• This device is suitable for vacuuming dry, flammable dusts that are harmful to health; dust class M as per EN/IEC 60335-2-69 Restrictions: No carcinogenic substances may be vacuumed.

• There is a risk of fire and explosion when vacuuming combustible dusts. Use only by qualified users.

• WARNING - This device may only be used to collect the combustible dusts specified by the manufacturer. Combinations of different metals or dusts can lead to fires or explosions (exothermic reactions).

• This device is suitable for vacuuming combustible dusts, with the exception of aluminium dust or powder and magnesium dust or powder, in non-classified (normal) areas.

• It is not permitted to pick up hot particles or glowing substances, as they can cause a fire and explosion in the hose or container.

• This device is not suitable for vacuuming liquids with a flash point below 55 °C.

• This device is not suitable for vacuuming dusts with an ignition energy of less than 1 mJ.

• The device is suitable for the direct extraction of dust-generating power tools (use as a dust remover), but not for devices that generate ignition sources.

• It must be ensured that no ignition sources are picked up.

• This device is not suitable for use in classified, hazardous areas ATEX zones), for vacuuming dusts or liquids with a high risk of explosion or mixtures of combustible dust and liquids.

• This device is suitable for commercial use,e.g. in hotels, schools, hospitals, factories, shops, offices, and rental companies.

• For Switzerland only: The socket outlet shall only be used during operation in dry condition.

The device switches off automatically during operation without the main filter element.

• The included accessories are electrically conductive. The device may only be used with electrically conductive accessories that have been approved by KÄRCHER. There is a risk of explosion if other accessories are used.

• The user must be aware of all relevant properties of the combustible dusts that the device sucks up and determine the associated safety aspects.

1. Unpack the device and install the accessories.

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The device has 2 operating modes:

1. Industrial vacuum cleaner operation (power socket not used)

2. Dust removal operation (power socket used)

1. Connect the suction hose and attach a suction nozzle or connect to the dust generating device, depending on the operating mode.

The horn sounds (intermittent tone) when the air speed drops below 20 m/s.

1. Set the turn switch to the correct hose cross-section.

The horn sounds (continuous tone) when the cooling air filter is clogged.

1. Allow the device to cool down. Clean/replace the cooling air filter.

Static charges are discharged through the earthed connection nozzles. This prevents sparking and electric shocks with electrically conducting accessories (included in the scope of delivery).

• NT 30/1: For particularly dust-free dirt disposal when vacuuming small to medium quantities of fine dust, we recommend using a fleece filter bag with cap, order number 2.889-154.0 (5 pieces). The device is fitted with a fleece filter bag.

• NT 40/1, NT 50/1: For particularly dust-free dirt disposal when vacuuming small to medium quantities of fine dust, we recommend using a fleece filter bag with cap, order number 2.889-155.0 (5 pieces). The device is fitted with a fleece filter bag.

• For vacuuming large quantities of fine dust, we recommend using a dust bag with cable tie, order number 2.889-231.0 (10 pieces). The device is fitted with a dust bag.

1. Unlock and remove the suction head.

2. Fit the fleece filter bag.

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3. Fit and lock the suction head.

1. Unlock and remove the suction head.

2. Insert the dust bag.

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3. Pull the dust bag over the container. Ensure that the marking line is within the container and the ventilation hole is positioned on the back wall of the container.

4. Fit and lock the suction head.

1. Remove the brush strip.

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2. Install the squeegees.

1. Fit a plug exactly into the suction connection.

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2. Push the plugs in until they engage.

• The fleece filter bag must always be removed when vacuuming wet substances.

1. Unlock and remove the suction head.

2. Pull the fleece filter bag on the flange up and out.

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3. Seal the fleece filter bag with cap.

4. Dispose of the used fleece filter bag in accordance with statutory regulations.

5. Fit and lock the suction head.

• The dust bag must always be removed when vacuuming wet substances.

1. Unlock and remove the suction head.

2. Fold up the dust bag.

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3. Take off the protective film and close the ventilation hole with a self-adhesive tab.

4. Seal the dust bag tightly underneath the opening using cable ties.

5. Remove the dust bag.

6. Clean the container inside with a moist cloth.

7. Dispose of the dust bag in accordance with statutory regulations.

8. Fit and lock the suction head.

NT 50/1 only:

1. Drain the waste water via the drain hose.

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• We recommend switching off the "Automatic filter dedusting" function when vacuuming wet dirt with the crevice nozzle or the upholstery nozzle (optional), or when sucking mainly water out of a container.

• The device switches off automatically when the maximum fluid level is reached.

• When vacuuming non-conductive liquids (e.g. drill emulsion, oils and grease) the device does not automatically switch off when the container is full. The filling level must be continuously monitored and the container emptied on a timely basis.

• On completion of wet vacuum cleaning: Clean the main filter element using the dedusting function and let it dry. Clean the electrodes with a brush. Clean the container with a moist cloth and dry it off.

The suction hose is equipped with a clip system. All accessory parts with a nominal width of 35 mm can be connected.

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1. Check all filters for correct position and damage.

1. Connect the mains plug.

2. Set the turn switch to the desired program.

1. Plug the mains plug of the power tool into the power socket on the vacuum cleaner. The vacuum cleaner is in Standby mode.

2. Switch on the device at the turn switch.

   Note

   The vacuum cleaner is automatically switched on and off with the power tool.

   Note

   The vacuum cleaner has a startup delay of up to 0.5 seconds and an after-running time of up to 15 seconds.

   Note

   See the Technical data for the permissible power rating of the power tool.

3. Remove the angle piece from the suction hose.

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4. Install the tool adapter on the suction hose.

5. Connect the tool adapter to the power tool.

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6. Set the minimum volume flow on the turn switch for suction hose cross section. The scale shows the suction hose suction hose cross section.

   Note

   The different suction hose cross sections are necessary in order to adapt to the different connection cross sections of the processing machines.

   Note

   For operation as a dust removal device for mobile operation (processing machine plugged into the vacuum cleaner) the integrated monitoring system must be adjusted to suit the connected processing machine (dust generator). This means that the user must be warned when the flow rate drops below the minimum value 20 m/s needed for correct vacuuming.

The device is equipped with a special filter dedusting function, which is particularly effective against fine dust. The main filter element is automatically cleaned every 7.5/15/60 seconds (depending on use) using an airflow (pulsing sound).

1. Set the turn switch to program 2 (TACT AUTO).

2. Power dedusting (for particularly severe contamination of the main filter element): Set the turn switch to program 2, seal the suction pipe or bender with your hand and wait for the automatic filter cleaning to finish (lasts 15 seconds).

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1. Switch off the device at the turn switch.

2. Pull out the mains plug.

1. Empty the container.

2. Vacuum off the inside and outside of the device and clean with a moist cloth.

NT 50/1 only:

1. Release the push handle lock and adjust the push handle.

1. Store the suction hose and mains cable as shown in the illustration.

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2. Store the device in a dry room and secure it against unauthorised use.

1. Empty the container.

2. Close the suction connection, see wet vacuum cleaning.

3. Remove the suction hose with floor nozzle from the support. Carry the device by the carrying handle and the suction pipe, not by the push handle.

4. When transporting the device in vehicles, secure it to prevent it from slipping or overturning in accordance with the respective valid guidelines.

The device may only be operated indoors.

Dust extraction machines are safety devices for the prevention or elimination of hazards according to the German DGUV regulation 1 (German accident prevention regulation, principles of prevention).

• You can perform basic maintenance and care work yourself.

• Clean the inside of the container and the suction hose regularly with a damp cloth and check for dust accumulation.

• Clean the surface of the device regularly with a damp cloth, as a possible accumulation of dust on the device can be a potential source of ignition.

• Perform regular ground continuity checks in accordance with federal, state, provincial and local laws and regulations.

1. Open the filter cover.

2. Remove the filter frame.

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3. Remove the flat fold filter.

4. Dispose of the used flat fold filter in accordance with statutory regulations.

5. Remove any dirt deposits from the clean air side.

6. Clean the filter frame and the supporting surface of the filter frame with a damp cloth.

7. Fit the new flat fold filter. During insertion, ensure that the flat fold filter is flush on all sides.

8. Insert the filter frame.

9. Close the filter cover until it audibly latches into place.

1. Open the filter cover.

2. Take out the candle filter (special accessories).

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3. Dispose of the used candle filter (special accessories) in accordance with statutory regulations.

4. Remove any dirt deposits from the clean air side.

5. Clean the candle filter frame with a damp cloth.

6. Insert the new candle filter (special accessories).

7. Close the filter cover until it audibly latches into place.

1. Close the suction connection, see wet vacuum cleaning.

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2. Unlock and remove the suction head.

3. Pull the fleece filter bag on the flange up and out.

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4. Seal the fleece filter bag with cap.

5. Dispose of the used fleece filter bag in accordance with statutory regulations.

6. Fit the new fleece filter bag.

7. Fit and lock the suction head.

1. Close the suction connection, see wet vacuum cleaning.

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2. Unlock and remove the suction head.

3. Fold up the dust bag.

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4. Take off the protective film and close the ventilation hole with a self-adhesive tab.

5. Seal the dust bag tightly underneath the opening using cable ties.

6. Remove the dust bag.

7. Clean the container inside with a moist cloth.

8. Dispose of the dust bag in accordance with statutory regulations.

9. Fit the new dust bag.

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10. Pull the dust bag over the container. Ensure that the marking line is within the container and the ventilation hole is positioned on the back wall of the container.

11. Fit and lock the suction head.

1. Allow the appliance to cool down.

2. Unlock the cooling air flaps with a screwdriver and fold them out.

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3. Clean (vacuum, wash) or replace the cooling air filter.

4. Fold the cooling air flaps in and latch it into place.

1. Unlock and remove the suction head.

2. Clean the electrodes with a brush.

3. Fit and lock the suction head.

• Suction turbine does not start up 

• Suction turbine switches off 

• Suction turbine does not switch on again after emptying the container 

• Suction power decreases 

• Escaping dust when vacuuming 

• The automatic switch-off mechanism (wet vacuum cleaning) does not trigger 

• Horn sounds - intermittent tone 

• Horn sounds - continuous tone 

• Automatic filter dedusting not working 

• The automatic filter dedusting function cannot be switched off 

• The automatic filter dedusting function cannot be switched on 

Remedy:

1. Check the socket and the power supply fuse.

2. Check the mains cable, mains plug, electrodes and power socket on the device.

3. Switch on the device.

Remedy:

1. Empty the container.

2. Insert the main filter element.

Remedy:

1. Switch off the device and wait for 5 seconds. Switch on the device.

2. Clean the electrodes with a brush.

Remedy:

1. Remove any blockages from the suction nozzle, suction pipe, suction hose or main filter element.

2. Change the filled fleece filter bag.

3. Dispose of the filled dust bag.

4. Correctly engage the filter cover.

5. Change the main filter element.

6. NT 50/1 only: Check the drain hose for leaks.

Remedy:

1. Only with flat fold filters: Check that the flat fold filter is correctly fitted and correct if necessary.

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2. Change the main filter element.

Remedy:

1. Clean the electrodes with a brush.

2. Continuously monitor the filling level when vacuuming non-conductive liquids.

Remedy:

1. Set the turn switch to the correct hose cross-section.

2. The fleece filter bag must be replaced when it is full and the air flow drops below the specified minimum flow rate.

3. The dust bag must be replaced when it is full and the air flow drops below the specified minimum flow rate.

4. Change the main filter element.

Remedy:

1. Allow the device to cool down. Clean/replace the cooling air filter.

Remedy:

1. Suction hose not connected.

Remedy:

1. Contact Customer Service.

Remedy:

1. Contact Customer Service.

If the malfunction cannot be corrected, the device must be checked by the Customer Service department.

• Suction turbine does not start up 

• Suction turbine switches off 

• Suction turbine does not switch on again after emptying the container 

• Suction power decreases 

• Escaping dust when vacuuming 

• The automatic switch-off mechanism (wet vacuum cleaning) does not trigger 

• Horn sounds - intermittent tone 

• Horn sounds - continuous tone 

• Automatic filter dedusting not working 

• The automatic filter dedusting function cannot be switched off 

• The automatic filter dedusting function cannot be switched on 

Remedy:

1. Check the socket and the power supply fuse.

2. Check the mains cable, mains plug, electrodes and power socket on the device.

3. Switch on the device.

Remedy:

1. Empty the container.

2. Insert the main filter element.

Remedy:

1. Switch off the device and wait for 5 seconds. Switch on the device.

2. Clean the electrodes with a brush.

Remedy:

1. Remove any blockages from the suction nozzle, suction pipe, suction hose or main filter element.

2. Change the filled fleece filter bag.

3. Dispose of the filled dust bag.

4. Correctly engage the filter cover.

5. Change the main filter element.

6. NT 50/1 only: Check the drain hose for leaks.

Remedy:

1. Only with flat fold filters: Check that the flat fold filter is correctly fitted and correct if necessary.

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2. Change the main filter element.

Remedy:

1. Clean the electrodes with a brush.

2. Continuously monitor the filling level when vacuuming non-conductive liquids.

Remedy:

1. Set the turn switch to the correct hose cross-section.

2. The fleece filter bag must be replaced when it is full and the air flow drops below the specified minimum flow rate.

3. The dust bag must be replaced when it is full and the air flow drops below the specified minimum flow rate.

4. Change the main filter element.

Remedy:

1. Allow the device to cool down. Clean/replace the cooling air filter.

Remedy:

1. Suction hose not connected.

Remedy:

1. Contact Customer Service.

Remedy:

1. Contact Customer Service.

At the end of its service life, the device is to be disposed of in accordance with statutory regulations.

The warranty conditions issued by our relevant sales company apply in all countries. We shall remedy possible malfunctions on your appliance within the warranty period free of cost, provided that a material or manufacturing flaw is the cause. In a warranty case, please contact your dealer (with the purchase receipt) or the next authorised customer service site.

Further information can be found at: www.kaercher.com/dealersearch

Further warranty information (if available) can be found in the service area of your local Kärcher website under "Downloads".

Only use original accessories and original spare parts. They ensure that the appliance will run fault-free and safely.

Information on accessories and spare parts can be found at www.kaercher.com.

We hereby declare that the product named below complies with the relevant provisions of the directives and regulations listed. This declaration is invalidated by any changes made to the product that are not approved by us.

Product: Wet/dry vacuum cleaner (ACD)

Type: 1.148-xxx

2006/42/EC (+2009/127/EC)

2011/65/EU

2014/30/EU

EN IEC 63000: 2018

EN 55014-1: 2017 + A11: 2020

EN 55014-2: 1997 + A1: 2001 + A2: 2008

EN 60335-1

EN 60335-2-69

EN 61000-3-2: 2014

EN 61000-3-3: 2013

EN 62233: 2008

IEC 60335-1: 2020

IEC 60335-2-69: 2021

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The signatories act on behalf of and with the authority of the company management.

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Documentation supervisor:

S. Reiser

Alfred Kärcher SE & Co. KG

Alfred-Kärcher-Str. 28 - 40

71364 Winnenden (Germany)

Ph.: +49 7195 14-0

Fax: +49 7195 14-2212

Winnenden, 2023/10/18

• NT 30/1 Tact Te M ACD 

• NT 40/1 Tact Te M ACD 

• NT 50/1 Tact Te M ACD