DeWalt D27904, D27905 Instruction Manual

D27904, D27905
Heavy-Duty Dust Extractor Vacuums
Extracteurs industriels de poussière
Aspiradoras para trabajos pesados de extracción de polvo

INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES

INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA
DE GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO ANTES
DE USAR EL PRODUCTO.

If you have questions or comments, contact us.

Pour toute question ou tout commentaire, nous contacter.

Si tiene dudas o comentarios, contáctenos.

1-800-4-DEWALT • www.dewalt.com

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English

IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT
THIS OR ANY D

EWALT TOOL, CALL US TOLL FREE AT:

1-800-4-D

EWALT (1-800-433-9258).

Important Safety Instructions

Important Safety Instructions

NOTE: This vacuum is intended for commercial use.

WARNING: When using electric appliances, always follow

basic safety precautions to reduce the risk of fire, electric shock
and personal injury, including the following:

BEFORE USING THIS APPLIANCE, READ AND FOLLOW
ALL INSTRUCTIONS.

• Connect to a properly grounded outlet only (See Grounding
Instructions).

• Do not leave the appliance when it is connected to a power
source. Unplug it from outlet when not in use and before
servicing.

• Do not expose the appliance to rain. Store it indoors. This
action will reduce the risk of electric shock.

• Do not allow the appliance to be used as a toy. Pay close
attention when the appliance is used by or near children.

• Use this appliance ONLY as described in the manual. Use only
D

EWALT recommended attachments.

• Do not use this appliance with a damaged cord or plug. If the
appliance is not working correctly, or if it has been dropped,
damaged, left outdoors, or dropped in water, return it to a
service center.

• Do not pull or carry this appliance by the cord, use the cord
as a handle, close a door on the cord, or pull the cord around
sharp edges or corners. Do not run the appliance over the cord.
Keep cord away from heated surfaces.

• Do not unplug this appliance by pulling on the cord. To unplug,
grasp the plug, not the cord.

• Do not handle the plug or appliance with wet hands.

• Do not put any objects into the openings of the appliance. Do
not use the appliance with any opening blocked; keep free of
dust, lint, hair and anything else that may reduce air flow.

• Keep hair, loose clothing, fingers, and all body parts away from
the openings and moving parts.

• Turn off all controls before unplugging appliance.

• Use extra care when cleaning on stairs.

• Do not use the appliance to pick up flammable or combustible
liquids, such as gasoline, or use in areas where flammable or
combustible liquids are present.

Defi nitions: Safety Guidelines

The definitions below describe the level of severity for each
signal word. Please read the manual and pay attention to
these symbols.

DANGER: Indicates an imminently hazardous situation

which, if not avoided, will result in death or serious

injury.

WARNING: Indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury.

CAUTION: Indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury.
NOTICE: Indicates a practice not related to personal injury
which, if not avoided, may result in property damage.

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SAVE THESE INSTRUCTIONS

ADDITIONAL SAFETY RULES

• This vacuum can be converted to meet the EPA lead-related
Renovations, Repair and Painting (RRP) Rule for HEPA
vacuum only when used with the D279041H HEPA filter.
(included with D27905H).

The D279042F disposable fleece bag is recommended to

lengthen the life of the HEPA filter.

Contact the United States Environmental Protection Agency

(EPA) for more information on their Renovations, Repair and
Painting (RRP) Rule.

• Do not pick up anything that is burning or smoking, such as
cigarettes, matches, or hot ashes.

• Do not use to vacuum combustible explosive materials, such as
coal, grain, or other finely divided combustible material.

• Do not use to vacuum hazardous, toxic or carcinogenic
materials, such as asbestos or pesticide.

• Never pick up explosive liquids (e.g. gasoline, diesel fuel,
heating oil, paint thinner, etc.), acids or solvents.

• Do not use vacuum without filter and/or filter bags in place.

• Some wood contains preservatives which can be toxic. Take
extra care to prevent inhalation and skin contact when working
with these materials. Request and follow any safety information
available from your material supplier.

• Do not use vacuum as a step stool.

• An extension cord must have adequate wire size (AWG
or American Wire Gauge) for safety. The smaller the gauge
number of the wire, the greater the capacity of the cable, that
is 16 gauge has more capacity than 18 gauge. An undersized
cord will cause a drop in line voltage resulting in loss of power
and overheating. When using more than one extension to make
up the total length, be sure each individual extension contains
at least the minimum wire size. The following table shows the

correct size to use. If in doubt, use the next heavier gauge. The
smaller the gauge number, the heavier the cord.

• If an extension cord is to be used outdoors it must be marked
with the suffix W-A or W following the cord type designation.
For example – SJTW-A to indicate it is acceptable for outdoor
use.

Minimum Gauge for Cord Sets
Volts Total Length of Cord in Feet (meters)
120V

25 (7.6) 50 (15.2) 100 (30.5) 150 (45.7)

240V

50 (15.2) 100 (30.5) 200 (61.0) 300 (91.4)

AWG

14 12 Not Recommended

WARNING: Always use eye protection. All users and

bystanders must wear eye protection that conforms to ANSI
Z87.1.

WARNING: Always wear proper personal hearing protection

that conforms to ANSI S12.6 (S3.19) during use. Under some

conditions and duration of use, noise from this product may
contribute to hearing loss.

WARNING: ALWAYS use safety glasses. Everyday eyeglasses

are NOT safety glasses. Also use face or dust mask if area
operation is dusty. ALWAYS WEAR CERTIFIED SAFETY
EQUIPMENT:

• ANSI Z87.1 eye protection (CAN/CSA Z94.3),

• ANSI S12.6 (S3.19) hearing protection,

• NIOSH/OSHA/MSHA respiratory protection.

WARNING: This product contains chemicals, including lead,

known to the State of California to cause cancer, and birth
defects or other reproductive harm. Wash hands after handling.

WARNING: Some dust contains chemicals known to the State

of California to cause cancer, birth defects or other reproductive
harm. Some examples of these chemicals are:

• compounds in fertilizers,

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• compounds in insecticides, herbicides and pesticides,

• arsenic and chromium from chemically-treated lumber.
To reduce your exposure to these chemicals, wear approved
safety equipment such as dust masks that are specially designed
to filter out microscopic particles.

SAVE THESE INSTRUCTIONS

Grounding Instructions

This appliance must be grounded. If it should malfunction or
breakdown, grounding provides a path of least resistance for
electric current to reduce the risk of electric shock. This appliance
is equipped with a cord having an equipment-grounding conductor
and grounding plug. The plug must be inserted into an appropriate
outlet that is properly installed and grounded in accordance with
all local codes and ordinances.

WARNING: Improper connection of

GROUNDED

OUTLET

FIG. A

GROUNDING

PIN

the equipment-grounding conductor
can result in a risk of electric shock.
Check with a qualified electrician or
service person if you are in doubt as to
whether the outlet is properly
grounded. Do not modify the plug
provided with the appliance – if it will
not fit the outlet, have a proper outlet
installed by a qualified electrician.

This appliance is for use on a nominal 120-volt circuit and has a
grounding attachment plug that looks like the plug illustrated in
Figure A. Make sure that the appliance is connected to an outlet
having the same configuration as the plug. No adapter should be
used with this appliance.

Motor

Many DEWALT tools will operate on either D.C. or single phase
25 to 60 cycle A.C. current and voltage within plus or minus

5 percent of that shown on the specification plate on the tool.
Several models, however, are designed for A.C. current only.
Refer to the specification plate on your tool for proper voltage and
current rating.
Do not operate your tool on a current on which the voltage is not
within correct limits. Do not operate tools rated A.C. only on D.C.
current. To do so may seriously damage the tool.

SAVE THESE INSTRUCTIONS

COMPONENTS (FIG. 1)

WARNING: Never modify the power tool or any part of it.

Damage or personal injury could result.

A. Hose wrap I. Carry handle
B. Outlet for power tools J. Filter compartment
C. Canister latch K. Filter door handle
D. On/Off switch L. Cord wrap
E. Variable suction dial M. Power cord
F. Outlet activation switch N. Canister
G. Twist-lock hose inlet O. Vacuum lid
H. Suction hose

INTENDED USE

These vacuums are used for fine particulate pick-up, like drywall,
concrete, wood or surface dust. These units come equipped with a
built in outlet for use with power tools providing automatic vacuum
start-up when tool is turned on and a 15-second vacuum overrun
to clear suction hose when tool is turned off, dual filtration system,
corrosion resistant tank, large wheels for easy maneuvering and
a convenient flat top surface tray for holding tools while working.
DO NOT use under humid conditions or in presence of flammable
liquids or gases.
These heavy-duty vacuums are for professional use. DO NOT let
children come into contact with the tool. Supervision is required
when inexperienced operators use this tool.

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FIG. 1
A

B

C

D

F

G

H

ASSEMBLY (FIG. 1–4)

WARNING: To reduce the risk of serious personal injury,
turn tool off and disconnect tool from power source before
making any adjustments or removing/installing attachments
or accessories.

WARNING: When using electric appliances, always follow

basic safety precautions to reduce the risk of fire, electric shock
and personal injury.

WARNING: The flat pleated filter

FIG. 2

P

(P) must always be in place while
vacuuming. When vacuuming fine
dust, you may also use an additional
paper filter or fleece bag.

1. Release the two canister locks

(C), (one on each side of vacuum
cleaner).

2. Lift the vacuum lid from the canister and carefully set aside.

3. Remove wheels and accessories from canister.

4. Turn canister over and place on a solid flat surface.

FIG. 3

D27905D27904

R

Q

R

Q

S

S

5. Slide wand bracket (S) onto tank as shown BEFORE

assembling wheels assembly (R).

6. Insert the casters (Q) into holes provided and press firmly to

seat in place.

Model D27904 is shown

E

I

K

L

J

O

N

M

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7. Place the wheels assembly (R) into slots and press firmly to
seat in place. Fasten wheel assembly to the tank with two steel
clips and two Phillips head screws. Turn canister over and
place wheels/casters onto solid flat surface.

8. If paper filter or fleece bag is to be used, install as shown (T).

NOTE: Be careful to not tear the bag. Ensure bag is placed

securely on inlet to provide a tight seal for maximum dust
collection performance.

9. Place the vacuum lid onto the container and secure it by
closing the canister locks.

10. Insert the twist-lock connection on the hose (H) into inlet and
rotate clockwise to lock in place.

T

FIG. 4

H

OPERATION

WARNING: To reduce the risk of serious personal injury,
turn tool off and disconnect tool from power source before
making any adjustments or removing/installing attachments
or accessories.

WARNING: Risk of fire. Do not pick up anything that is

burning, smoldering or smoking such as matches, cigarettes, or
hot ashes.

• Do not use to vacuum combustible explosive materials,
such as coal, grain, or other finely divided combustible
material.

• Do not use to vacuum hazardous, toxic or carcinogenic
materials, such as asbestos or pesticide.

• This vacuum can be converted to meet the EPA lead-related
Renovations, Repair and Painting (RRP) Rule for HEPA
vacuum only when used with the D279041H HEPA filter
(included with D27905H).

The D279042F disposable fleece bag is recommended to

lengthen the life of the HEPA filter.

Contact the United States Environmental Protection Agency

(EPA) for more information on their Renovations, Repair
and Painting (RRP) Rule.

WARNING: When using electric appliances, always follow

basic safety precautions to reduce the risk of fire, electric shock
and personal injury.

1. Plug the power cord into an

FIG. 5

D

E

appropriate outlet.

2. Depress on/off switch (D) to
turn the unit on.

3. Set the variable suction dial
(E) in the desired position.
See To Set Variable

Suction.

TO SET VARIABLE SUCTION (FIG. 6)

This feature allows the user to control the vacuum's power and
suction. The power level dedicated to the vacuum and the amount
of power going to the tool are controlled.
To determine the correct setting for the vacuum:

1. Determine the amperage of the power tool being used with the
vacuum.

2. Refer to the following chart for the correct variable suction dial
setting.

Maximum Tool

Amperage Rating

Variable Speed

Setting

3.0 Amps MAX

3.5 Amps 1/2

5.0 Amps MIN

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3. Rotate the variable suction dial to

FIG. 6

E

the correct setting MIN, 1/2 or
MAX.

4. Follow the direction under

Connecting to Power Tools to
connect to the power tool to be
used.

NOTE: This setting also controls the level of suction. This is very
useful in applications where the vacuum creates unacceptable
levels of drag to the work piece.

CONNECTING TO POWER TOOLS (FIG. 7, 8)

1. Plug the vacuum power cord

B

V

FIG. 7

D

F

into an appropriate outlet.

2. Plug the power tool into the
outlet (B).

3. Depress on/off switch (D) to
turn the unit on.

4. Depress outlet activation
switch (F) to activate
automatic mode.

5. The light (V) will come on, indicating the vacuum cleaner is in
the stand by mode.

6. To switch back to manual mode, depress outlet activation
switch (F). The light (V) will go off, indicating vacuum is in
manual mode.

NOTE:

• The vacuum cleaner is turned on and off automatically with

the electric power tool.

• The vacuum cleaner starts automatically within 0.5 seconds

and continues to run for 15 seconds after the power tool has
been turned off.

• Please refer to Specifications

U

FIG. 8

H

for the power connection
specifications of the power tools.

7. Choose the correct power
tooladaptor (U) to fit the power tool
connection on the tool to be used.
Attach power tool adaptor (U) to
power tool.

8. Attach the suction hose (H) to the power tool adaptor.

AUTOMATIC FILTER CLEANING SYSTEM
D27904

This vacuum has an innovative filter cleaning system that is
particularly effective with fine dust. The flat pleated filter is
automatically cleaned every 15 seconds through an air jet
(pulsating sound).
The automatic filter cleaning system senses when the filter
becomes blocked and will adjust the pressure of the pulsing.
To achieve the full effect of the filter cleaning system, block the
end of the hose on a hard surface until the filter cleaning system
activates. This will produce the maximum pulse and the best
cleaning of the filter.

PARKING BRAKE (FIG. 9)
D27904

The parking brake will lock one wheel in

FIG. 9

place to prevent vacuum from rolling.

1. To engage parking brake, depress the
brake button to snap the brake into the
locked position.

2. To disengage parking brake, depress
the brake button and brake will snap
into the unlocked position.

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AUTOMATIC SHUT OFF (FIG. 1, 10)

Vacuum will shut off when canister fills with water. W hen this
happens:

1. Depress the on/off switch (D) to turn the unit off. Unplug the
unit.

2. Release vacuum lid from the canister and carefully set aside.

3. Empty canister.

Electrodes must be clean to ensure proper operation of automatic
shut off.

To Clean Electrodes

1. Depress the on/off switch (D)

FIG. 10

W

W

to turn the unit off. Unplug the
unit.

2. Release vacuum lid from the
canister and carefully set
aside.

3. Clean electrodes (W).

4. Replace vacuum lid onto
canister and lock in place.

To Shut Down (Fig. 1)

1. Depress the on/off switch (D) to turn the unit off.

2. Unplug the unit.

MAINTENANCE

WARNING: To reduce the risk of serious personal injury, turn
tool off and disconnect tool from power source before making
any adjustments or removing/installing attachments or
accessories.

TO REPLACE THE PLEATED FILTER (FIG. 11)

1. Lift the filter door handle

P

J

FIG. 11

K

(K) to open filter
compartment (J).

2. Replace the flat pleated
filter (P).

3. Close the filter door.
Ensure door locks into
place.

Cleaning

WARNING: Blow dirt and

dust out of all air vents with
dry air at least once a week. Wear proper ANSI Z87.1 (CAN/CSA
Z94.3) eye protection and proper NIOSH/OSHA/MSHA
respiratory protection when performing this.

WARNING: Never use solvents or other harsh chemicals for

cleaning the non-metallic parts of the tool. These chemicals may
weaken the plastic materials used in these parts. Use a cloth
dampened only with water and mild soap. Never let any liquid get
inside the tool; never immerse any part of the tool into a liquid.

Storage (Fig. 12)

1. Empty the canister.

2. Wipe the vacuum inside and outside.
See Cleaning.

3. Gently shake filter to clean.

NOTE: Do not use compressed air,

water or cleaning solutions to clean
filter. See To Replace the Pleated

Filter.

4. Store the suction hose and the power
cord as shown in the illustration.

FIG. 12

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Place the unit in a dry room and secure it from unauthorized
use.

Accessories

WARNING: Since accessories, other than those offered by

D

EWALT, have not been tested with this product, use of such

accessories with this tool could be hazardous. To reduce the risk
of injury, only D

EWALT, recommended accessories should be

used with this product.

Recommended accessories for use with your tool are available at
extra cost from your local dealer or authorized service center. If
you need assistance in locating any accessory, please contact
D

EWALT Industrial Tool Co., 701 East Joppa Road, Baltimore,

MD 21286, call 1-800-4-D

EWALT (1-800-433-9258) or visit our

website www.dewalt.com.

OPTIONAL ACCESSORIES

D279041 Nano coated general purpose filter

D279041H HEPA filter: Captures 99.97% of all

particles greater than or equal to

0.3 microns. Required when picking up
lead paint debris.

D279053 1-1/4" OD–2-1/4" OD

(31.6 mm–57.2 mm) tool adapter

D279054 1" ID–1-1/4" (25.4 mm–31.6 mm) tool

adapter

D279055 Step adapter

D279056 Y splitter

D279058AS Anti-static 14' (4.3 m) hose

ANTI-STATIC HOSE OPTION

The D27904 and D27905 are both
equipped with an anti-static grounding
system. To take advantage of this
option, an anti-static hose must be
purchased. This hose (D279058AS)
fits into the dust extractor system the
same way as the standard hose.

D279058 Crush proof 14' (4.3 m) hose

The filter efficiency of the D

EWALT dust extractor vacuums can

be significantly increased with the use of filter bags. The filter
bags also provide a clean, easy, and quick way to dispose of the
dust collected.

Paper filter bags: The D279042/D279052 filter bags are
designed to capture many types of dust including drywall,
concrete, and wood. They provide filtration performance of

99.9% at 2 microns. These bags should be disposed of once the
airflow becomes restricted. DO NOT reuse bags.

D279042 Disposable paper filter bag (for use

with D27904)
12 gallon (45.4 L)

D279052 Disposable paper filter bag (for use

with D27905) 10 gallon (37.9 L)

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Repairs

To assure product SAFETY and RELIABILITY, repairs, maintenance
and adjustments (including brush inspection and replacement)
should be performed by a D

EWALT factory service center, a

D

EWALT authorized service center or other qualified service

personnel. Always use identical replacement parts.

Three Year Limited Warranty

DEWALT will repair, without charge, any defects due to faulty
materials or workmanship for three years from the date of
purchase. This warranty does not cover part failure due to normal
wear or tool abuse. For further detail of warranty coverage
and warranty repair information, visit www.dewalt.com or call
1-800-4-D

EWALT (1-800-433-9258). This warranty does not apply

to accessories or damage caused where repairs have been made
or attempted by others. This warranty gives you specific legal
rights and you may have other rights which vary in certain states
or provinces.

In addition to the warranty, D

EWALT tools are covered by our:

1 YEAR FREE SERVICE

D

EWALT will maintain the tool and replace worn parts caused by

normal use, for free, any time during the first year after purchase.

90 DAY MONEY BACK GUARANTEE

If you are not completely satisfied with the performance of your
D

EWALT Power Tool, Laser, or Nailer for any reason, you can

return it within 90 days from the date of purchase with a receipt for
a full refund – no questions asked.
LATIN AMERICA: This warranty does not apply to products sold
in Latin America. For products sold in Latin America, see country
specific warranty information contained either in the packaging,
call the local company or see website for warranty information.

Fleece filter bag: The D279052F fleece bag is designed to
capture many types of dust including drywall, concrete, and
wood. It provides filtration performance of 95% at 0.3 microns.
This bag should be disposed of once the airflow becomes
restricted. DO NOT reuse this bag. The fleece bag is ideal for
heavier materials such as concrete and drywall dust where
a paper filter bag may tear. It also provides 2.5 times more
capacity than a paper filter bag, increasing productivity and
value.

D279052F Disposable fleece filter bag

10 gallon (37.9 L)

The D279042D disposable plastic bag is designed to work in
conjunction with the D27904 heavy-duty dust extractor vacuum
with automatic filter cleaning. The design seals the liner to the
tank inlet without being pulled into the filter during use. The
plastic disposable bag allows for easy cleanup and disposal of
dust and keeps dust from escaping back into the atmosphere
during emptying. Because this bag is specially designed not
to be pulled into the filter, there will be a small amount of dust
remaining in the tank.

D279042D Disposable plastic collection bag

(for use with D27904)
12 gallon (45.4 L)

D279059 Accessory Kit includes: (2) Extension,

(1) Curved wand, (1) Crevice tool, (1)
Squeegee/floor sweeper

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FREE WARNING LABEL REPLACEMENT: If your warning labels
become illegible or are missing, call 1-800-4-D

EWALT for a free

replacement.

Troubleshooting

PROBLEM SOLUTION

Suction turbine does
not run

Check power cord, plugs and outlet.
Ensure the on/off switch is in the ON

position.

Suction capacity
decreases

Remove blockages in the suction
nozzle, suction tube, suction hose or
flat pleated filter.

Replace the paper filter bag.
Ensure the filter cover properly locks

into place.
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 filter
cleaning is not working
(D27904 only)

Suction hose is not connected.
Ensure flat pleated filter is clean and

dry.

Power tool does not
turn on.

Ensure the outlet activation switch is
set to automatic mode.

SPECIFICATIONS

MODEL D27904 D27905

Volts 120 V ~ 120 V ~
Hertz 60 60
Amps 9 A 9 A
12 A (with tool) 12 A (with tool)
Capacity 12 gallon (45.5 liter) 10 gallon (37.9 liter)