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Extension Cords
If an extension cord must be used, be sure it is:
• a 3-wire extension cord that has a 3-blade grounding plug, and a 3-slot receptacle that will
accept the plug on the product
• in good condition
• no longer than 50' (15.2 m)
• 14 gauge (AWG) or larger. (Wire size increases as gauge number decreases. 12 AWG and
10 AWG may also be used. DO NOT USE 16 OR 18 AWG.)
NoTIcE: Risk of Property Damage. The use of an undersized extension cord will cause voltage
to drop resulting in power loss to the motor and overheating. Instead of using an extension cord,
increase the working reach of the air hose by attaching another length of hose to its end. Attach
additional lengths of hose as needed.
Voltage and Circuit Protection
Refer to the specification chart for the voltage and minimum branch circuit requirements.
WARNING: Risk of Overheating. Certain air compressors can be operated on a 15 amp
circuit if the following conditions are met.
1. Voltage supply to circuit must comply with the National Electrical Code.
2. Circuit is not used to supply any other electrical needs.
3. Extension cords comply with specifications.
4. Circuit is equipped with a 15 amp circuit breaker or 15 amp time delay fuse.
noTe: If compressor is connected to a circuit protected by fuses, use only time delay fuses.
Time delay fuses should be marked "D" in Canada and "T" in the US.
If any of the above conditions cannot be met, or if operation of the compressor repeatedly
causes interruption of the power, it may be necessary to operate it from a 20 amp circuit. It is
not necessary to change the cord set.
OPERATION
Know Your Air Compressor
READ THIS OWNER'S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR UNIT.
Compare the illustrations with your unit to familiarize yourself with the location of various controls
and adjustments. Save this manual for future reference.
Description of Operation (Fig. 2–4)
Become familiar with these controls before operating the unit.
on(i)/off(o) switch (D): Place this switch in the On (I) position to provide automatic power to
the pressure switch and Off (O) to remove power at the end of each use.
pressure switch (not shown): The pressure switch 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.
safety valve (h): If the pressure switch does not shut off the air compressor at its "cut-out"
pressure setting, the safety valve will protect against high pressure by "popping out" at its factory
set pressure (slightly higher than the pressure switch "cut-out" setting).
Tank pressure Gauge (i): The tank pressure gauge indicates the reserve air pressure in the
tank.
outlet pressure Gauge (e): The outlet pressure gauge indicates the air pressure available at
the outlet side of the regulator. This pressure is controlled by the regulator and is always less
than or equal to the tank pressure.
regulator (G): Controls the air pressure shown on the outlet pressure gauge. Turn regulator
knob clockwise to increase pressure and counterclockwise to decrease pressure.
cooling system (not shown): This compressor contains an advanced design cooling system.
At the heart of this cooling system is an engineered fan. It is perfectly normal for this fan to blow
air through the vent holes in large amounts. You know that the cooling system is working when
air is being expelled.
Air compressor pump (not shown): Compresses air into the air tank. Working air is not
available until the compressor has raised the air tank pressure above that required at the air
outlet.
Drain valve (k): The drain valve is located at the base of the air tank and is used to drain
condensation at the end of each use.
check valve (m): When the air compressor is operating, the check valve is "open", allowing
compressed air to enter the air tank. When the air compressor reaches "cut-out" pressure, the
check valve "closes", allowing air pressure to remain inside the air tank.
motor overload protector (not shown): 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 lever to "Off" and unplug unit.
2. Allow the motor to cool.
3. Plug the power cord into the correct branch circuit receptacle.
4. Set the Auto/Off lever to "On" position.
Quick-connect Body (f): The quick connect body accepts industrial quick connect plugs. The
two quick connect bodies allow the use of two tools at the same time.
How to Use Your Unit (Fig. 2)
hoW To sTop
1. Set the On/Off switch (D) to "Off".
2. Unplug unit when not in use.
Before sTArTinG
WARNING: Do not operate this unit until you read this instruction manual for safety, operation
and maintenance instructions.
Before eAch sTArT-Up
1. Set the On/Off switch (D) to "Off".
2. Plug the power cord into the correct branch circuit receptacle. (Refer to voltage and circuit
protection paragraph in the Installation section of this manual.)
3. T urn the regulator knob (G) counterclockwise to set the outlet pressure to zero.
4. Attach hose and accessories.
WARNING: Risk of unsafe operation. Firmly grasp air hose in hand when installing
or disconnecting to prevent hose whip.
WARNING: Risk of unsafe operation. Do not use damaged or worn accessories.
noTe: The hose or accessory will require a quick connect plug if the air outlet is equipped with
a quick connect body (F).
WARNING: Risk of Bursting. Too much air pressure causes a hazardous risk of bursting.
Check the manufacturer's maximum pressure rating for air tools and accessories. The regulator
outlet pressure must never exceed the maximum pressure rating.
NoTIcE: Risk of property damage. Compressed air from the unit may contain wa t er
condensation and oil mist. Do not spray un fil tered air at an item that could be damaged by
moisture. Some air tools and accessories may require filtered air. Read the in s truc t ions for the
air tools and accessories.
hoW To sTArT
1. Set the On/Off switch (D) to "On" and allow tank pressure to build. Motor will stop when tank
pressure reaches "cut-out" pressure.
2. Turn regulator knob (G) clockwise to increase pressure and stop when desired pressure is
reached.
WARNING: Risk of unsafe operation. If any unusual noise or vibration is noticed,
stop the compressor immediately and have it checked by a trained service technician.
The compressor is ready for use.
MAINTENANCE
Customer Responsibilities
Before each use
Check Safety Valve
Drain Tank
Remove tank from service
For more information, call 1-800-4-D
1-
WARNING: Risk of unsafe operation. Unit cycles automatically when power is on.
When performing maintenance, you may be exposed to voltage sources, compressed air,
or moving parts. Personal injuries can occur. Before performing any maintenance or repair,
disconnect power source from the compressor and bleed off all air pressure.
noTe: See operation section for the location of controls.
To Check Safety Valve (Fig. 2)
WARNING: Risk of Bursting. If the safety valve does not work properly, over-pressurization
may occur, causing air tank rupture or an explosion.
WARNING: Risk from flying objects. Always wear certified safety equipment:
ANSI Z87.1 eye protection (CAN/CSA Z94.3) with side shields.
Before starting compressor, pull the ring on the safety valve (H) to make sure that the safety valve
operates freely. If the valve is stuck or does not operate smoothly, it must be replaced with the
same type of valve.
To Drain Tank (Fig. 2, 3)
WARNING: Risk of Unsafe Operation. Air tanks contain high pressure air. Keep face and
other body parts away from outlet of drain. Use ANSI Z87.1 eye protection (CAN/CSA Z94.3)
when draining as debris can be kicked up into face.
WARNING: Risk from noise. Always wear proper hearing protection during use. Under some
conditions and duration of use, noise from this product may contribute to hearing loss.
noTe: All compressed air systems generate condensate that accumulates in any drain point (e.g.,
tanks, filter, aftercoolers, dryers). This condensate contains lubricating oil and/or substances which
may be regulated and must be disposed of in accordance with local, state, and federal laws and
regulations.
WARNING: Risk of Bursting. Water will condense in the air tank. If not drained, water will
corrode and weaken the air tank causing a risk of air tank rupture.
NoTIcE: Risk of Property Damage. Drain water from air tank may contain oil and rust which
can cause stains.
1. Set the On/Off switch (D) to "Off".
2. Turn the regulator knob (G) counterclockwise to set the outlet pressure to zero.
3. Remove the air tool or accessory.
4. Place a suitable container under the drain valve to catch discharge.
5. Pull ring on safety valve (H) allowing air to bleed from the tank until tank pressure is
approximately 20 psi. Release safety valve ring.
6. Drain water from air tank by opening drain valve (K) on bottom of tank.
7. After the water has been drained, close the drain valve. The air compressor can now be
stored.
noTe: If drain valve is plugged, release all air pressure. The valve can then be removed,
cleaned, the reinstalled.
STORAGE
Before you store the air compressor, make sure you do the following:
1. Review the maintenance section on the preceding pages and perform scheduled
maintenance as necessary.
2. Drain water from air tank. See To Drain Tank under maintenance.
Daily or after
see tank warning label
each use
X
X
WALT (1-800-433-9258)
e
fiG. 1
fiG. 2
J
fiG. 3
K
fiG. 5
WARNING: Water will condense in the air tank. If not drained, water will corrode and
weaken the air tank causing a risk of air tank rupture.
3. Protect the electrical cord and air hose from damage (such as being stepped on or run over).
Wind air hose loosely around the compressor handle. Wrap electrical cord onto the cord
wrap.
4. Store the air compressor in a clean and dry location.
Accessories
WARNING: The use of any other accessory not recommended for use with this tool could be
hazardous. Use only accessories rated equal to or higher than the rating of the air compressor.
Recommended accessories for use with your tool are available for purchase from your local
dealer or authorized service center. If you need assistance in locating any accessory for your tool,
please contact D
e
1-800-4-D
WALT (1-800-433-9258) or visit our website www.dewalt.com.
e
Service Information
Please have the following information available for all service calls:
Model Number _____________________ Serial Number ________________________________
Date and Place of Purchase _______________________________________________________
Repairs
To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustment should be
performed by a D
qualified service personnel. Always use identical replacement parts.
Full One Year Warranty
D
WALT heavy duty industrial tools are warranted for one year from date of purchase. We
e
will repair, without charge, any defects due to faulty materials or workmanship. For warranty
repair information, call 1-800-4-D
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.
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.
free WArninG LABeL repLAcemenT (fig. 5): If your warning labels become illegible or
are missing, call 1-800-4-D
GLOSSARY
cfm: Cubic feet per minute.
scfm: Standard cubic feet per minute; a unit of measure of air delivery.
psi: Pounds per square inch; a unit of measure of pressure.
kpa (kilopascal): Metric pressure measurement. 1 kilopascal equal 1000 pascals.
code certification: Products that bear one or more of the following marks: UL
ETL
, CETL, CETLUS, have been evaluated by OSHA certified independent safety laboratories
®
and meet the applicable Standards for Safety.
*UL
®
is a registered trademark of Underwriters Laboratories and ETL
trademark of Electrical Testing Laboratories.
cut-in pressure: While the motor is off, air tank pressure drops when accessory is used.
When the tank pressure drops to a certain low level the motor will restart automatically. The
low pressure at which the motor automatically restarts is called cut-in pressure.
cut-out pressure: When an air compressor is turned on and begins to run, air pressure in
the air tank begins to build. It builds to a certain high pressure before the motor automatically
shuts off, protecting your air tank from pressure higher than its capacity. The high pressure at
which the motor shuts off is called cut-out pressure.
Branch circuit: The circuit carrying electricity from electrical panel to outlet.
Duty cycle: This air compressor pump is capable of running continuously. However, to prolong
the life of your air compressor, it is recommended that a 50%-75% average duty cycle be
maintained; that is, the air compressor pump should not run more than 30-45 minutes in any
given hour.
X
1
This section provides a list of the more frequently encountered malfunctions, their causes and
corrective actions. The operator or maintenance personnel can perform some corrective actions,
and others may require the assistance of a qualified D
problem
Excessive air tank pressure-safety valve pops off ................................................... 1, 2
Air leaks .................................................................................................................... 3
Air leaks in air tank or at air tank welds ...................................................................... 4
Air leaks between head and valve plate ..................................................................... 5
Air leaks from safety valve .......................................................................................... 6
Pressure reading on the regulated pressure gauge
drops when an accessory is used .............................................................................. 7
Compressor is not supplying enough air to operate accessories
............................................................................................................ 8, 9, 10, 11, 12
Regulator knob has continuous air leak ................................................................... 13
Regulator will not shut off air outlet .......................................................................... 13
Motor will not run .............................................................6, 14, 15, 16, 17, 18, 19, 20
Squealing Sound ..................................................................................................... 21
coDe
possiBLe cAUse
1
Pressure switch does
not shut off motor
when compressor
reaches cut-out
pressure
2
Pressure switch cut-
out too high
3
Tube fittings are not
tight enough
4
Defective air tank
5
Leaking seals
6
Defective safety valve
7
Regulator is not
adjusted correctly for
accessory being used
8
Prolonged excessive
use of air
A
c
B
D
I
H
G
fiG. 4
WALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286, call
WALT factory service center, a D
WALT authorized service center or other
e
e
WALT (1-800-433-9258). This warranty does not apply to
e
WALT (1-800-433-9258) for a free replacement.
e
Troubleshooting Guide
WALT technician or your dealer.
e
Troubleshooting Codes
possiBLe soLUTion
Set the Auto/Off switch to OFF, if the unit does not shut
off contact a D
WALT factory service center or a D
e
authorized service center.
Contact a D
WALT factory service center or a D
e
authorized service center.
Tighten fittings where air can be heard escaping. Check
fittings with soapy water solution. Do not overtighten.
Air tank must be replaced. Do not repair the leak.
WARNING: Risk of bursting. Do not drill into, weld or
otherwise modify air tank or it will weaken. The air tank can
rupture or explode.
Contact a D
WALT factory service center or a D
e
authorized service center.
Operate safety valve manually by pulling on ring. If valve still
leaks, it must be replaced.
It is normal for some pressure drop to occur when an
accessory is used, adjust the regulator as instructed in
Regulator under features if pressure drop is excessive.
noTe: Adjust the regulated pressure under flow conditions
while accessory is being used.
Decrease amount of air usage.
E
F
M
, CUL, CULUS,
®
®
is a registered
code
WALT
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WALT
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WALT
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