Installation; Preparation For Use; Troubleshooting Guide; Extension Cords - DeWalt d55141 Instruction Manual

InSTALLATIon

Assembly (Fig. 1)
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. Grasp the hose at the quick connect plug and push the plug into the quick connect
body (E). Coupler will snap into place.
3. Grasp the hose and pull to ensure coupler is seated.
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. Push coupler on quick connect body back to release quick connect plug on hose.
Grounding Instructions (Fig. 2)
WARNING: Risk of electrical shock. In the event of a short circuit, grounding reduces the
risk of shock by providing an escape wire for the electric current. This air compressor must
be properly grounded.
The portable air compressor is equipped with a cord having a grounding wire with an
appropriate grounding plug.
1. The cord set and plug (J) with this unit contains a grounding pin (L). This plug Must be
used with a grounded outlet (K).
IMPortant: The outlet being used must be installed and grounded in accordance with all
local codes and ordinances.
2. Ensure the outlet being used has the same configuration as the grounded plug. DO NOT
USE AN ADAPTER.
3. Inspect the plug and cord before each use. Do not use if there are signs of damage.
4. If these grounding instructions are not completely understood, or if in doubt as to
whether the compressor is properly grounded, have the installation checked by a
qualified electrician.
DANGER: Risk of electrical shock. IMPROPER GROUNDING CAN RESULT IN
ELECTRICAL SHOCK.
• Do not modify the plug provided. If it does not fit the available outlet, a correct outlet
should be installed by a qualified electrician.
• Repairs to the cord set or plug MUST be made by a qualified electrician.

extension cords

If an extension cord must be used, be sure it is:
• a 3­wire extension cord that has a 3­blade grounding plug, and a 3­slot receptacle that
will accept the plug on the product
• in good condition
• plug is not worn
• no longer than 50 feet (15.2 m)
• 12 gauge (AWG) or larger. (Wire size increases as gauge number decreases. 10 AWG and
8 AWG may also be used. DO NOT USE 14 OR 16 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. Always use a minimum 3/8"
(9.5 mm) or greater air hose rated at 300 psi.

voltage and circuit Protection

Refer to the Voltage and Minimum Branch circuit requirements under Specifications.
CAUTION: Risk of Overheating. Certain air compressors can be operated on a 15 amp
circuit if the following conditions are met.
• Voltage supply to circuit must comply with the National Electrical Code.
• Circuit is not used to supply any other electrical needs.
• Extension cords comply with specifications.
• 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 U.S.
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.
compatibility
note: Always use an air line filter to remove moisture and oil vapor when spraying paint.
Location
Place the air compressor in a clean, dry and well ventilated area at least 12" (30.5 cm) away
from the wall or other obstructions that will interfere with the flow of air. Keep the compressor
away from areas that have dirt and/or volatile fumes in the atmosphere. These impurities may
clog the intake filter and valves, causing inefficient operation.
WARNING: The air compressor pump and shroud are designed to allow for proper
cooling. The ventilation openings on the compressor are necessary to maintain proper
operating temperature. Do not place rags or other containers on or near these openings.
Place the air compressor on a flat surface resting on the rubber feet.
electrIcal
Refer to all safety instructions before using unit. Observe extension cord safety instructions,
if necessary. Always move the On/Off switch (A) to the OFF position before removing the
plug from the outlet.
Transporting
When transporting the compressor in a vehicle, trailer, etc., ensure that the tank is drained
and the unit is secured. Use care when driving to avoid tipping the unit over in the vehicle.
Damage can occur to the compressor or surrounding items if the compressor is tipped.
MoVInG
When moving the compressor, grasp the handle and carry the compressor as close to the
body as possible.
WARNING: Ensure proper footing and use caution when carrying compressor to avoid a
loss of balance.

PrePArATIon For uSe

WARNING: Do not operate this unit until you read this instruction manual for safety,
operation and maintenance instructions.
Pre-Start checklist (Fig. 1)
1. Ensure the On/Off switch (A) is in the OFF position.
2. Plug the power cord into the correct branch circuit receptacle. See Voltage and circuit
Protection under Installation.
3. Ensure air tank is drained, see draining air tank under Maintenance.
4. Ensure the drain valve (H) is closed.
5. Ensure safety valve (G) is functioning properly, see checking safety Valve under
Maintenance.
6. Pull the regulator knob (D) out and turn counterclockwise until fully closed. Ensure regulated
pressure gauge reads 0 psi. Push knob in to lock in place.
7. 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.
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.

oPerATInG ProceDureS

Start-up (Fig. 1)
1. Follow Pre-start checklist under Preparation for Use.
NOTICE: Risk of property damage. Do not operate in vertical position. Vertical position is for
storage only.
2. Move the On/Off switch to the ON position and allow tank pressure to build. Motor will
stop when tank pressure reaches cut-out pressure.
CAUTION: Risk of unsafe operation. Compressed air from the unit may contain wa ter
condensation and oil mist. Do not spray un fil tered air at an item that could be damaged by
moisture. Some air op er ated tools or de vic es may require filtered air. Read the in struc tions
for the air tool or device.
3. Adjust regulator (D) to desired setting. See regulator under Features.
Shut-down (Fig. 1)
1. Move On/Off switch (A) to the OFF position.
note: If finished using compressor, follow Steps 2–6.
note: When the unit has been turned off, it is normal to hear a short hiss of air being
released.
note: Unplug unit when not in use.
2. Pull the regulator knob (D) out and turn counterclockwise until fully closed. Ensure regulated
pressure gauge reads 0 psi. Push knob in to lock in place.
3. Remove hose and accessory.
WARNING: Risk of unsafe operation. Firmly grasp air hose in hand when installing or
disconnecting to prevent hose whip.
4. Drain the air tank, see draining air tank under Maintenance. Ensure air tank pressure
gauge reads 0 psi.
WARNING: Risk of bursting. Drain air tank daily. Water will condense in air tank. If not
drained, water will corrode and weaken the air tank causing a risk of air tank rupture.
5. Allow the compressor to cool down.
6. Wipe air compressor clean and store in a safe, non-freezing area.
MAInTenAnce
The following procedures must be followed when maintenance or service is performed on the
air compressor.
1. Ensure On/Off switch is in the OFF position.
2. Remove air compressor plug from outlet.
3. Drain air tank.
4. Allow air compressor to cool down before starting service.
note: All compressed air systems contain maintenance parts (e.g., oil, filters, separators) that
are periodically replaced. These used parts may contain substances that are regulated and must
be disposed of in accordance with local, state, and federal laws and regulations.
note: Take note of the positions and locations of parts during disassembly to make reassembly
easier.
note: Any service operations not included in this section should be performed by a D
factory service center or a D WALT authorized service center.
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Maintenance chart

Procedure Before each use daily or after each use
Check safety valve X
Drain air tank
Remove tank from
service
1- For more information, call 1-800-4-D
see tank warning label
X
WALT (1-800-433-9258)
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FIG. 1
D
B
FIG. 3
checking Safety valve (Fig. 1)
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 when using the compressor.
Before starting compressor, pull the ring on the safety valve to make sure that the safety
valve operates freely. Before starting compressor, pull the ring on the safety valve to make
sure that the safety valve operates freely. note: Ring may be difficult to pull when air tank
pressure is at 0 psi. If the valve is stuck or does not operate smoothly, it must be replaced
with the same type of valve.
Draining Air Tank (Fig. 1)
WARNING: Risk of unsafe operation. Risk from noise. Air tanks contain high pressure
air. Keep face and other body parts away from outlet of drain. Use eye protection
[ANSI Z87.1 (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. Drain air tank daily. Water will condense in 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. Ensure On/Off switch is in the OFF position.
2. Lift compressor into an inclined position so drain valve (H) is at the lowest point (this will
assist in removing moisture, dirt, etc. from air tanks).
3. Place a suitable container under the drain valve to catch discharge.
4. Grasp lever on drain valve.
5. Slowly rotate lever to gradually bleed air from air tank.
6. When air tank pressure gauge reads 10 psi, rotate valve to the fully open position.
7. Close drain valve when finished.
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
call 1-800-4-D WALT (1-800-433-9258) or visit our website www.dewalt.com.
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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
other 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
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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. 3): 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
CULUS, 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.
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
dealer.
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
Knocking Noise .......................................................................................................... 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
code PossIBle cause
1 Pressure switch
does not shut
off motor when
compressor reaches
cut-out pressure
2 Pressure switch cut-
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out too high
3 Tube fittings are not
tight enough
4 Defective air tank
5 Leaking seals
X 1
6 Defective safety
valve
NOT A STEP/ PAS UNE ÉTAPE
/RESGUARDO (NO PISAR)
C
E
I
FIG. 2
J
K
L
WALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286,
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WALT factory service center, a D WALT authorized service center or
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WALT (1-800-433-9258). This warranty does not apply to
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WALT (1-800-433-9258) for a free replacement.
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Troubleshooting Guide

Troubleshooting codes
PossIBle solutIon
Set the On/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.
DRAIN TANK DAI LY
G
H
F
A
® , CUL,
® is a registered
WALT technician or your
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code
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