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USER MANUAL D27901 DEWALT
English (original instructions) 13
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Technical diagram of a vacuum cleaner with numbered parts and exploded view, showing internal components and assembly details.
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Line drawing of a vacuum cleaner with attached components and cardboard boxes (no text or symbols)
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1 2 1 1
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2
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3 2 1 'Click' 'Click'
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4
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5 22 1
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6 2x (Optional) (Optional)
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Diagram of a handheld welding torch with a curved handle and attached cable, showing a tool tip (no text or symbols present)
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Line drawing of a vacuum cleaner with attached hose and control panel, shown with an inset close-up of the handle (no text or symbols)
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Line drawing of a hand adjusting a fabric or material inside a mechanical device (no text or symbols)
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Illustration of a welding torch with attached hoses and connectors, showing motion direction (no text or symbols)
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B 1. 2.
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Illustration of a hand using a power tool to apply a component to a mechanical clamp (no text or symbols present)
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C
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G ① Press ②
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D 35 32 26 21,5 26,9 31 25 45Vice President Engineering and Product Development
DEWALT
You have chosen a DEWALT tool. Years of experience, thorough product development and innovation make DEWALT one of the most reliable partners for professional power tool users.

Please read and comply with these original instructions prior to the initial operation of your appliance and store them for later use or subsequent owners.
– Before first start-up it is definitely necessary to read the safety indications Nr. 5.956-249!
- The non-compliance of the operating and safety instructions may lead to damages of the appliance and to dangers for the operator and other persons.
– In case of transport damage inform vendor immediately
Contents
Environmental protection .. EN ...1
Symbols in the operating instructions ..... EN ...2
Proper use ..... EN ...2
Device elements..... EN ...2
Start up..... EN...2
Operation....EN...3
Transport...... EN...4
Storage..... EN...4
Maintenance and care .... EN ...4
Troubleshooting ..... EN ...4
Warranty..... EN...5
Accessories and Spare Parts EN . . .5
EC Declaration of Conformity EN . . .6
Technical specifications . . . EN . . .7
Environmental protection

Separate collection. This product must not be disposed of with normal household waste.
Should you find one day that your DEWALT product needs replacement, or if it is of no further use to you, do not dispose of it with household waste. Make this product available for separate collection.

Separate collection of used products and packaging allows materials to be recycled and used again.
Re-use of recycled materials helps prevent environmental pollution and reduces the demand for raw materials.
- Local regulations may provide for separate collection of electrical products from the household, at municipal waste sites or by the retailer when you purchase a new product.
- DEWALT provides a facility for the collection and recycling of DEWALT products once they have reached the end of their working life. To take advantage of this service please return your product to any authorised repair agent who will collect them on our behalf.
- You can check the location of your nearest authorised repair agent by contacting your local DEWALT office at the address indicated in this manual. Alternatively, a list of authorised DEWALT repair agents and full details of our after-sales service and contacts are available on the Internet at:
www.2helpU.com
Symbols in the operating instructions
⚠️Danger
Immediate danger that can cause severe injury or even death.
⚠ Warning
Possible hazardous situation that could lead to severe injury or even death.
Caution
Possible hazardous situation that could lead to mild injury to persons or damage to property.
Proper use
⚠ Warning
The appliance is not suitable for vacuuming dust which endangers health.
– The machine is meant for dry and wet cleaning of floors and walls.
- This appliance is suited for the commercial use, e.g. in hotels, schools, hospitals, factories, shops, offices, and rental companies.
Device elements
1 Electrodes
2 Handle
3 Suction hose
4 Suction head lock
5 Impeller
6 Indicator lamp
7 Suction support
8 Steering roller
9 Dirt receptacle
10 Floor nozzle (not included in the delivery)
11 Socket
12 Suction head
13 Suction pipe (not included in the delivery)
14 Main switch
15 Filter cover
16 Carrying handle
17 Slide for filter cleaning
18 Cable hook
19 Power cord
20 Bender
21 Floor nozzle holder
22 Holder for crevice nozzle
23 Holder for suction pipes
24 Nameplate
25 Flat fold filter
26 Exhaust filter
27 Filter dedusting
Start up
Dry vacuum cleaning
Caution
The flat pleated filter must must always be in place while vacuuming.
- When vacuuming fine dust, you may also use an additional paper filter bag or a membrane filter (special accessory).
Inserting the paper filter bag
Illustration A
→ Release and remove the suction head.
→ Insert the paper filter bag or the membrane filter (special attachment).
→ Insert and lock the suction head.
Wet vacuum cleaning (optional)
Inserting the rubber lips
Illustration B
→ Remove the brush strips.
→ Install the rubber lips.
Note: The structured side of the rubber lips must point outwards.
Remove the paper filter bag
- If the appliance is used to vacuum wet dirt the paper filter bag or the membrane filter (special accessory) must always be removed.
– It is recommended to use a special filter bag (wet) (see Filter systems).
General
Caution
The flat pleated filter must must always be in place while vacuuming.
- If wet dirt is vacuumed with the upholstery or crevice nozzle or if water is
sucked up from a container it is recommended to deactivate the "Filter Dedusting" function.
- If the maximum liquid level is reached the appliance will turn off automatically.
– In case of non-conductive liquids (such as emulsion drilling fluids, oils, and greases) the appliance is not turned off when the container is full. The filling level must be continuously monitored and the container must be emptied in time.
- After the wet vacuuming: Clean the flat folded filter with the filter cleaning. Clean the electrodes with a brush. Clean the container with a damp rag and dry it.
Clip connection
Illustration C
The suction hose is equipped with a clip system. All C-35/C-DN-35 accessories can be connected.
Operation
Turning on the Appliance
→ Plug in the main plug.
→ Switch on the appliance at the main switch.
Working with electrical power tools
⚠️Danger
Risk of injury and damage! The socket outlet is only for the connection of power tools to the vacuum cleaner. Any other use of the socket outlet is not permitted.
→ Connect the mains plug of the electric power tool to the vacuum cleaner.
→ Switch on the appliance at the main switch. Indicator lamp is on; vacuum cleaner is in the standby mode.
Note: The vacuum cleaner is turned on and off automatically with the electric power tool.
Note: The vacuum cleaner starts automatically within 0.5 seconds and continues to run for 15 seconds after the power tool has being switched off.
Note: Please refer to "Technical specifications" for the power connection specifications of the power tools.
Illustration D
→ Adjust the stepped power tool adaptor to fit the connection of the electric power tool.
Illustration E
→ Remove the elbow from the suction hose.
→ Attach the stepped power tool adaptor to the suction hose.
Illustration F
→ Connect the adaptor to the electric power tool.
Filter dedusting
Note: A filter dedusting every 5 to 10 minutes will increase the life of the flat folded filter.
– Switch off filter dedusting:
→ Push the slide upward.
– Switch on filter dedusting:
→ Push the slide downward.
Illustration G
→ Press and hold the switch on the handle for several seconds while the filter cleaning is turned on. The flat folded filter is automatically cleaned through an air jet (pulsating sound).
Turn off the appliance
→ Filter dedusting: Repeatedly press the button on the handle while the filter cleaning is turned on.
→ Switch off the appliance at the main switch.
→ Pull out the mains plug.
After each operation
→ Empty the container.
→ Vacuum and wipe the appliance inside and outside with a damp cloth.
Storing the Appliance
→ Wind the mains cable around the cable holder.
→ Place the appliance in a dry room and secure it from unauthorized use.
Transport
Caution
Risk of injury and damage! Observe the weight of the appliance when you transport it.
→ Remove the suction pipe with the floor nozzle from the holder. Hold the appliance at the handle and at the suction pipe to transport it.
→ When transporting in vehicles, secure the appliance according to the guidelines from slipping and tipping over.
Storage
Caution
Risk of injury and damage! Note the weight of the appliance in case of storage.
This appliance must only be stored in interior rooms.
Maintenance and care
⚠️Danger
First pull out the plug from the mains before carrying out any tasks on the machine.
Exchanging the flat pleated filter
→ Open filter door.
→ Replace the flat pleated filter.
→ Close the filter door, it must lock into place.
Replace the exhaust filter
→ Open filter door.
→ Replace the exhaust filter.
→ Close the filter door, it must lock into place.
Cleaning the electrodes
→ Release and remove the suction head.
→ Clean the electrodes with a brush.
→ Insert and lock the suction head.
Troubleshooting
⚠️Danger
First pull out the plug from the mains before carrying out any tasks on the machine.
Suction turbine does not run
→ Check cables, plugs, fuse, socket and electrodes.
→ Turn on the appliance.
Suction turbine turns off
→ Empty the container.
Suction turbine does not start again after the container has been emptied
→ Turn off the appliance and wait for 5 seconds, turn it on again after 5 seconds.
→ Clean the electrodes as well as the space between the electrodes with a brush.
Suction capacity decreases
→ Remove choking of suction nozzle, suction tube, elbow, handle, suction hose, or flat folded filter.
→ Exchange the paper filter bag.
→ Filter dedusting: Repeatedly press the button on the handle while the filter cleaning is turned on.
→ Ensure the filter cover properly locks into place.
→ Clean or replace the membrane filter (special accessory) under running water.
→ Replace the flat pleated filter.
Dust comes out while vacuuming
→ Check for proper installation of the flat pleated filter.
→ Replace the flat pleated filter.
Automatic shut-off (wet vacuum cleaning) does not react
→ Clean the electrodes as well as the space between the electrodes with a brush.
→ Continuously check the filling level in case of non-conductive liquid.
Filter dedusting switches permanently
→ Release the blocked suction nozzle or end of the hose.
→ Stop the continuous vacuuming from the liquid container or switch the filter cleaning off.
→ Remove choking of suction nozzle, suction tube, elbow, handle, suction hose, or flat folded filter.
→ Replace the flat pleated filter.
Filter cleaning is not working
→ Suction hose is not connected.
Automatic filter cleaning cannot be switched off
→ Inform Customer Service
Automatic filter cleaning cannot be switched on
→ Inform Customer Service
Warranty
30 DAY NO RISK SATISFACTION GUARANTEE
If you are not completely satisfied with the performance of your DEWALT tool, simply return it within 30 days, complete as purchased, to the pont of purchase, for a full refund or exchange. Proof of purchase must be produced.
ONE YEAR FREE SERVICE CONTRACT
If you need maintenance or service for your DEWALT Tool, in the 12 months following purchase, it will be undertaken free of charge at an authorized DEWALT repair agent. Proof of purchase must be produced. Includes labour and spare parts for power tools. Excludes accessories.
ONE YEAR FULL WARRANTY
If your DEWALT product becomes defective due to faulty materials or workmanship within 12 months from the date of purchase, we guarantee to replace all defective parts free of charge or, at our discretion, replace the unit free of charge provided that:
– The product has not be misused.
– Repairs have not been attempted by unauthorized persons.
– Proof of purchase date is produced.
This guarantee is offered as an extra benefit and is additional to consumers statutory rights.
For the location of your nearest authorized DEWALT repair agent, please use the appropriate telephone number on the back of this manual. Alternatively, a list of authorized DEWALT repair agents and full details on our after-sales service are available on the internet at
www.2helpU.com
Accessories and Spare Parts
- Only use accessories and spare parts which have been approved by the manufacturer. The exclusive use of original accessories and original spare parts ensures that the appliance can be operated safely and trouble free.
- For additional information about spare parts, please visit your DEWALT vendor.
EC Declaration of Conformity
MACHINERY DIRECTIVE

D27901
DEWALT declares that these products described under "technical data" are in compliance with:
Relevant EU Directives
2006/42/EC (+2009/127/EC)
2004/108/EC
Applied harmonized standards
EN 55014-1: 2006 + A1: 2009
EN 55014-2: 1997 + A2: 2008
EN 60335-1
EN 60335-2-69
EN 61000-3-2: 2006 + A2: 2009
EN 61000-3-3: 2008
EN 62233: 2008
Applied national standards
For more information, please contact
DEWALT at the following address or refer to the back of the manual.
The undersigned is responsible for compilation of the technical file and makes this declaration on behalf of DEWALT.

Horst Großmann
Vice President Engineering and Product Development
DEWALT
Technical specifications
| D27901 D27901 D27901 | |||
| EUR GB CH | |||
| Mains voltage V 230 230-240 230 | |||
| Frequency Hz 50/60 50/60 50/60 | |||
| Max. performance W 1380 1300 1300 | |||
| Rated power W 1200 1150 1150 | |||
| Container capacity I 45 45 | 45 | ||
| Filling quantity (liquid) | I 31 | 31 | 31 |
| Air volume (max.) | I/s 56 | 53 | 53 |
| Negative pressure (max.) | kPa (mbar) | 23,5 (235) | 22,0 (220) |
| Power connection data of the power tools | W 100-2200 | 100-1800 | 100-1100 |
| Protective class | -- I | I | I |
| Suction hose connection (C-DN/C-ID) | mm | 35 | 35 |
| Length x width x height | mm | 510 x 400 x 640 | 510 x 400 x 640 |
| Weight | kg | 11,0 11,0 | 11,0 |
| Max. ambient temperature | °C | +40 | +40 |
| Values determined to EN 60335-2-69 | |||
| Sound pressure level L_pA | dB(A) | 63 | 63 |
| Uncertainty K_pA | dB(A) | 1 | 1 |
| Hand-arm vibration value | m/s^2 | <2,5 | <2,5 |
| Uncertainty K | m/s^2 | 0,2 | 0,2 |
| Power cord | H05VV-F 3x1,5 mm ^2 | |
| D27901 | Part no.: | Cable length |
| GB | 597069-00 | 7,5 m |
| CH | 1002094-00 | 7,5 m |
| Power cord | H07RN-F 3x1,5 mm2 | |
| D27901 | Part no.: | Cable length |
| EUR 1003279 | -00 7,5 m | |
Félicitations !
Entreposage..... FR...4
Entretien et maintenance .. FR ...4
Assistance en cas de panne FR . . .4
Garantie .... FR ... 5
GARANTIE TOTALE D'UN AN
2006/42/CE (+2009/127/CE)
2004/108/CE
Vice President Engineering and Product Development
DEWALT
2006/42/CE (+2009/127/CE)
2004/108/CE
Vice President Engineering and Product Development
DEWALT
Vice President Engineering and Product Development
DEWALT
2006/42/CE (+2009/127/CE)
2004/108/CE
Vice President Engineering and Product Development
DEWALT
2006/42/CE (+2009/127/CE)
2004/108/CE
Vice President Engineering and Product Development
DEWALT
Transport ..... DA ...4
Opbevaring..... DA...4
2006/42/EF (+2009/127/EF)
2004/108/EF
Vice President Engineering and Product Development
DEWALT
2006/42/EF (+2009/127/EF)
2004/108/EF
Vice President Engineering and Product Development
DEWALT
Vice President Engineering and Product Development
DEWALT
Vice President Engineering and Product Development
DEWALT
Vice President Engineering and Product Development
DEWALT
Vice President Engineering and Product Development
DEWALT
Vice President Engineering and Product Development
DEWALT
Vice President Engineering and Product Development
DEWALT
2006/42/ES (+2009/127/ES)
2004/108/ES
Vice President Engineering and Product Development
DEWALT
2006/42/WE (+2009/127/WE)
2004/108/WE
Vice President Engineering and Product Development
DEWALT
2006/42/ES (+2009/127/ES)
2004/108/ES
Uplatňované harmonizované normy:
EN 55014-1: 2006 + A1: 2009
EN 55014-2: 1997 + A2: 2008
EN 60335-1
EN 60335-2-69
EN 61000-3-2: 2006 + A2: 2009
EN 61000-3-3: 2008
EN 62233: 2008
Vice President Engineering and Product Development