DeWalt D55394 User manual

D55394
Contractor’s Electric Wheeled Portable Air Compressor
Compresseur d’air électrique portatif sur roues de classe entrepreneur
Compresor de aire eléctrico portátil con ruedas para contratistas
INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIOY 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-De

2


A. Pump Air Intake Filter
B. Pump Oil Drain Plug
C. On/Off Switch
D. Air Tank Pressure Gauge
E. Regulated Pressure Gauge
F. Pressure Regulator
G. Air Outlet

Inline, vertical twin cylinder
Single stage
Oil lubricated
Cast iron crankcase and cylinder
Bore: 2.756" (70 mm)
Stroke: 2.26" (57.5 mm)
Weight: 46 lbs. (20.86 kg)
Oil Capacity: 24.7 oz. (730 mL)

3.5 HP
230V, 16 A, 60 Hz
Two pole, induction type, 3450 RPM
Minimum branch circuit requirement: 20 A @ 230V
Fuse Type: Time delay
FIG. 1
L
J
NOT A
STEP
200
180
160
140
120
100
80
60
40
20
EF
G
D
B
H
M
C
K
I
H. Unloader Valve
I. Safety Valve
J. Air Tank Drain Valves
K. Pump Oil Dipstick/Oil
Fill Plug
L. Belt Tensioning Bolt
M. Pressure Switch
A

3
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
FIG. 2

MODEL D55394
WEIGHT 208 lbs. (94.4 kg)
HEIGHT 22.3" (566.4 mm)
WIDTH 24.2" (614.7 mm)
LENGTH 50" (1270 mm)
AIR TANK CAPACITY (GALLONS) 10.5 (39.7 liters)
APPROX CUT-IN PRESSURE
120 psi
APPROX. CUT-OUT PRESSURE
150 psi
SCFM @ 100 PSI *10.5
NOISE LEVEL +78 dBA
*Tested per ISO 1217
+Tested per ISO 3744
PUMP CYLINDER
AND HEAD
AFTERCOOLER

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.
CAUTION: Used without the safety alert symbol
indicates a potentially hazardous situation which, if
not avoided, may result in property damage.
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT
THIS OR ANY D
e WALT TOOL, CALL US TOLL FREE AT:
1-800-4-DeWALT (1-800-433-9258)

WARNING: Do not operate this unit until you read and understand
this instruction manual for safety, operation and maintenance
instructions.
WARNING: This product contains chemicals known to the
State of California to cause cancer, and birth defects or other
reproductive harm. Wash hands after handling.

4
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• Restrictinganyofthe
compressor ventilation
openings will cause serious
overheating and could
cause fire.
• Neverplaceobjectsagainst
or on top of compressor.
• Operatecompressorin
an open area at least 12"
(30.5 cm) away from any
wall or obstruction that would
restrict the flow of fresh air to
the ventilation openings.
• Operatecompressorina
clean, dry well ventilated
area. Do not operate unit
indoors or in any confined
area.
• Unattendedoperationof
this product could result in
personalinjuryorproperty
damage. To reduce the
risk of fire, do not allow
the compressor to operate
unattended.
• Alwaysremaininattendance
with the product when it is
operating.
• Alwaysturnoffandunplug
unit when not in use.
WARNING: Some dust contains chemicals known to the State of
California to cause cancer, birth defects or other reproductive harm
such as asbestos and lead in lead based paint.

DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Itisnormalforelectrical
contacts within the motor
and pressure switch to
spark.
 • Alwaysoperatethecompres-
sor in a well ventilated area
free of combustible materials,
gasoline, or solvent vapors.
 • Ifelectricalsparksfrom
compressor come into con-
tact with flammable vapors,
they may ignite, causing fire
or explosion.
 • Ifsprayingflammablemate-
rials, locate compressor
at least 20' (6.1 m) away
from spray area. An addi-
tional length of hose may be
required.
 • Storeflammablematerialsin
a secure location away from
compressor.

5
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DANGER: RISK TO BREATHING (ASPHYXIATION)
WHAT CAN HAPPEN HOW TO PREVENT IT
• Thecompressedairdirectly
from your compressor is not
safe for breathing.The air
stream may contain carbon
monoxide, toxic vapors,
or solid particles from the
air tank.Breathing these
contaminants can cause
seriousinjuryordeath.
• Neveruseairobtaineddirectly
from the compressor to supply
air for human consumption.
The compressor is not
equipped with suitable filters
and in-line safety equipment
for human consumption.
• Exposuretochemicals
in dust created by
power sanding, sawing,
grinding, drilling, and other
construction activities may
be harmful.
• Sprayedmaterialssuchas
paint, paint solvents, paint
remover, insecticides, weed
killers, may contain harmful
vapors and poisons.
• Workinanareawithgood
cross ventilation. Read and
follow the safety instructions
provided on the label or
safety data sheets for the
materials you are spraying.
Always use certified safety
equipment: NIOSH/OSHA
respiratory protection or
properly fitting face mask
designed for use with your
specific application.
DANGER: RISK OF INJURY OR PROPERTY DAMAGE WHEN
TRANSPORTING OR STORING
WHAT CAN HAPPEN HOW TO PREVENT IT
• Oilcanleakorspillandcould
result in fire or breathing
hazard;seriousinjuryor
death can result. Oil leaks will
damage carpet, paint or other
surfaces in vehicles or trailers.
• Alwaysplacecompressor
on a protective mat when
transporting to protect against
damage to vehicle from leaks.
Remove compressor from
vehicle immediately upon arrival
at your destination. Always keep
compressor level and never lie
on its side.
WARNING: RISK OF BURSTING
Air Tank: The air tank on your Air Compressor is designed and may
be UM coded (for units with air tanks greater than 6 inch diameter)
according to ASME Section VIII, Div. 1 rules. All pressure vessels
should be inspected once every two years.To find your state pressure
vessels inspector, look under the Division of Labor and Industries in
the government section of a phone book or call 1-800-4-DeWALT for
assistance.
The following conditions could lead to a weakening of the air tank and
result in a violent air tank explosion:

6
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WHAT CAN HAPPEN HOW TO PREVENT IT
• Failuretoproperlydrain
condensed water from
air tank, causing rust and
thinning of the steel air tank.
• Drainairtankdailyorafter
each use. If air tank develops
a leak, replace it immediately
with a new air tank or replace
the entire compressor.
• Modificationsorattempted
repairs to the air tank. • Neverdrillinto,weld,ormake any modifications to the air
tank or its attachments. Never
attempt to repair a damaged or
leaking air tank. Replace with a
new air tank.
• Unauthorizedmodifications
to the, unloader valve,
safety valve or any other
components which control air
tank pressure.
• Theairtankisdesigned
to withstand specific
operating pressures. Never
makeadjustmentsorparts
substitutions to alter the factory
set operating pressures.
Attachments & accessories:
• Exceedingthepressure
rating of air tools, spray guns,
air operated accessories,
tires and other inflatables can
cause them to explode or
fly apart, and could result in
seriousinjury.
• Followtheequipment
manufacturers
recommendation and never
exceed the maximum
allowable pressure rating
of attachments. Never use
compressor to inflate small
lowpressureobjectssuch
as children’s toys, footballs,
basketballs, etc.
Tires:
• Over inflation of tires could
resultinseriousinjuryand
property damage.
 • Useatirepressuregaugeto
check the tires pressure before
each use and while inflating
tires; see the tire sidewall for
the correct tire pressure.
NOTE: Air tanks, compressors and
similar equipment used to inflate
tires can fill small tires similar to
theseveryrapidly.Adjustpressure
regulator on air supply to no more
than the rating of the tire pressure.
Add air in small increments and
frequently use the tire gauge to
prevent over inflation.
WARNING: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN HOW TO PREVENT IT
• This air compressor is
powered by electricity.
Like any other electrically
powered device, If it is not
used properly it may cause
electric shock.
 • Never operate the
compressor outdoors when it
is raining or in wet conditions.
 • Never operate compressor
with protective covers
removed or damaged.

7

 • Repairs attempted by
unqualified personnel can
resultinseriousinjuryor
death by electrocution.
 • Any electrical wiring or
repairs required on this
product should be performed
by a DeWALT factory
service center or a DeWALT
authorized service center in
accordance with national and
local electrical codes.
 • Electrical Grounding:
Failure to provide adequate
grounding to this product
couldresultinseriousinjury
or death from electrocution.
See Grounding
Instructions under
Installation.
 • Make sure the electrical circuit
to which the compressor is
connected provides proper
electrical grounding, correct
voltage and adequate fuse
protection.
WARNING: RISK FROM FLYING OBJECTS
WHAT CAN HAPPEN HOW TO PREVENT IT
• Thecompressedairstream
can cause soft tissue
damage to exposed skin and
can propel dirt, chips, loose
particlesandsmallobjects
at high speed, resulting in
property damage or personal
injury.
• Always wear certified safety
equipment: ANSI Z87.1 eye
protection (CAN/CSA Z94.3)
with side shields when using
the compressor.
• Neverpointanynozzleor
sprayer toward any part of
the body or at other people or
animals.
• Alwaysturnthecompressoroff
and bleed pressure from the
air hose and air tank before
attempting maintenance,
attaching tools or accessories.
WARNING: RISK OF HOT SURFACES
WHAT CAN HAPPEN HOW TO PREVENT IT
• Touchingexposedmetal
such as the compressor
head, engine head, engine
exhaust or outlet tubes, can
result in serious burns.
 • Nevertouchanyexposed
metal parts on compressor
during or immediately after
operation. Compressor will
remain hot for several minutes
after operation.
 • Donotreacharound
protective shrouds or attempt
maintenance until unit has
been allowed to cool.

8

WARNING: RISK FROM MOVING PARTS
WHAT CAN HAPPEN HOW TO PREVENT IT
• Movingpartssuchasthe
pulley, flywheel and belt can
causeseriousinjuryifthey
come into contact with you or
your clothing.
• Neveroperatethecompressor
with guards or covers which
are damaged or removed.
• Keepyourhair,clothingand
gloves away from moving
parts.Looseclothes,jewelry
or long hair can be caught in
moving parts.
• Airventsmaycovermoving
parts and should be avoided
as well.
• Attemptingtooperate
compressor with damaged or
missing parts or attempting
to repair compressor with
protective shrouds removed
can expose you to moving
parts and can result in
seriousinjury.
• Anyrepairsrequiredonthis
product should be performed
by a DeWALT factory
service center or a DeWALT
authorized service center.
WARNING: RISK OF UNSAFE OPERATION
WHAT CAN HAPPEN HOW TO PREVENT IT
• Unsafeoperationofyourair
compressor could lead to seri-
ousinjuryordeathtoyouor
others.
• Reviewandunderstandall
instructions and warnings in
this manual.
• Becomefamiliarwiththe
operation and controls of the
air compressor.
• Keepoperatingareaclearofall
persons, pets and obstacles.
• Keepchildrenawayfromthe
air compressor at all times.
• Donotoperatetheproduct
when fatigued or under the
influence of alcohol or drugs.
Stay alert at all times.
• Neverdefeatthesafetyfea
tures of this product.
• Equipareaofoperationwitha
fire extinguisher.
• Donotoperatemachinewith
missing, broken or unautho-
rized parts.
• Neverstandonthecompressor.

9

WARNING: RISK OF INJURY FROM LIFTING
WHAT CAN HAPPEN HOW TO PREVENT IT
 • Seriousinjurycanresultfrom
attempting to lift too heavy
anobject.
 • Thecompressoristooheavy
to be lifted by one person.
Obtain assistance from others
before lifting.
CAUTION: RISK FROM NOISE
WHAT CAN HAPPEN HOW TO PREVENT IT
• Undersomeconditionsand
duration of use, noise from
this product may contribute
to hearing loss.
 • Alwayswearcertifiedsafety
equipment: ANSI S12.6
(S3.19) hearing protection.



DUAL CONTROL
Dual control allows the compressor to operate in the constant
run or the stop/start mode of operation. The unloader valve (H)
is used to control the compressor when operating in the constant
run mode. The pressure switch is used to control the compressor
when operating in the stop/start mode. The mode of operation is
determined by the amount of time the compressor will be required to
supply air. If the demand for air is infrequent, then the unit should be
operated in the stop/start mode to minimize unnecessary run time
and to save energy. If there is a frequent or extended demand for
air, and/or the unit is located in a remote area where access to the
compressor is difficult, the unit should be operated in the constant
run mode to minimize the number of times the motor must start in
an hour to ensure good motor life.
UNLOADER VALVE
When the maximum air tank pressure is H
obtained, the unloader valve (H) will blow-off.
This will cause the compressor to exhaust the
air to the atmosphere and not the tank. The
valve is preset by the manufacturer and must not
be removed or modified in any way.
PRESSURE SWITCH
The pressure switch (M) automatically starts the motor when the air
tank pressure drops below the factory set cut-in pressure. It stops
the motor when the air tank pressure reaches the factory set cut-out
pressure. The pressure release valve located on the side of the pres-
sure switch, is designed to automatically release compressed air from
the compressor head and the outlet tube when the air compressor
reaches cut-out pressure or is shut off. The pressure release valve
allows the motor to restart freely. When the motor stops running, air will
be heard escaping from this valve for a few seconds. No air should be
heard leaking when the motor is running.
SAFETY VALVE
This valve (I) is designed to prevent system
I
failures by relieving pressure from the system
when the compressed air reaches a predeter-
mined level. The valve is preset by the manu-
facturer and must not be removed or modified in
any way.

10

AIR INTAKE FILTER
The filter (A) is designed to clean air entering the pump.
A
To ensure the pump continually receives a clean, cool
and dry air supply the filter must always be clean and
the filter intake must be free from obstructions.
AIR TANK DRAIN VALVE
The drain valve (J) is used to remove J
moisture from the air tank after the air
compressor is shut off.
AIR TANK PRESSURE GAUGE
The air tank pressure gauge (D)
200
180
160
140
120
100
80
60
40
20
E
FD
indicates air pressure in the air tank.
REGULATED PRESSURE GAUGE
The regulated pressure gauge (E)
indicates the air pressure available at
the outlet side of the regulator. This
pressure is controlled by the regulator and is always less or equal to
the air tank pressure.
REGULATOR
The regulator knob (F) controls the air pressure coming from the air
tank.
To Adjust Regulator:
1. Pull regulator knob (F) out.
2. Turn knob clockwise to increase regulated pressure and
counterclockwise to decrease regulated pressure.
3. When desired pressure is shown on the regulated pressure
gauge push knob in to lock.
MOTOR OVERLOAD PROTECTOR
The motor has a thermal overload protector. If the motor overheats
for any reason, the overload protector will shut off the motor. The
motor must be allowed to cool down before restarting. To restart:
1. Set the On/Off switch to OFF and unplug unit.
2. Allow the motor to cool.
3. Depress the red reset button on the motor.
4.
Plug the power cord into the correct branch circuit receptacle.
5. Set the On/Off switch to ON/AUTO position.


INSTALLING HOSES
WARNING: Risk of unsafe operation. Firmly grasp hose in hand
when installing or disconnecting to prevent hose whip.
1. Ensure regulated pressure gauge reads 0 psi.
2. Apply sealant tape to hose threads.
3. Assemble hose to air outlet (G). IMPORTANT: Do not assemble
splitters directly to the air outlet (G).
NOTE: Assembling quick connect bodies to air outlet (G) and quick
connect plugs to hose ends make connecting and disconnecting
hoses simple and easy. Quick connect bodies and plugs are
available for purchase from your local dealer or authorized service
center.
DISCONNECTING HOSES
WARNING: Risk of unsafe operation. Firmly grasp hose in hand
when installing or disconnecting to prevent hose whip.
1. Ensure regulated pressure gauge reads 0 psi.
2. Remove hose(s) from air outlet(s) (G).