DeWalt DWFP55126 Air Compressor User Manual


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Extension Cords
If an extension cord must be used, be sure it is:
 
accept the plug on the product




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.
 
 
NOTE: If compressor is connected to a circuit protected by fuses, use only time delay fuses.

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
          
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)

On(I)/Off(O) Switch (D): 

Pressure Switch (not shown): The pressure switch automatically starts the motor when the


Safety Valve (H): 


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):


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:
 
2. Allow the motor to cool.
 
 
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
 
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
 
2.
Plug the power cord into the correct branch circuit receptacle.
 Voltage and Circuit
Protection paragraph in the Installation

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

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ter
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structionsforthe
air tools and accessories.
HOW TO START
 

 
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 Daily or after
each use
See tank warning label
Check Safety Valve X
Drain Tank X
Remove tank from service X
1
1- For more information,
call 1-800-4-DeW


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.

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: 

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.
 
 
 
4. Place a suitable container under the drain valve to catch discharge.
                 
approximately 20 psi. Release safety valve ring.
 
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

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.
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.
 
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
WALT
1-800-4-D
e
WALT
Service Information
Please have the following information available for all service calls:


Repairs

performed by a D
e
WALT factory service center, a D
e
WALT authorized service center or other
qualified service personnel. Always use identical replacement parts.
Full One Year Warranty
DeW heavy duty industrial tools are warranted for one year from date of purchase. We
will repair, without charge, any defects due to faulty materials or workmanship. For warranty
repair information, call 1-800-4-D
e
WALT       
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:            

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
e
WALT
GLOSSARY
CFM: Cubic feet per minute.
SCFM: 
PSI:
kPa (kilopascal): 
Code Certification: 
®


®

and meet the applicable Standards for Safety.
*UL
®
is a registered trademark of Underwriters Laboratories and ETL
®
is a registered
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
       

given hour.
Troubleshooting Guide
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
eW technician or your dealer.
Problem Code
Excessive air tank pressure-safety valve pops off ................................................... 1, 2
Air leaks ....................................................................................................................
Air leaks in air tank or at air tank welds ...................................................................... 4
Air leaks between head and valve plate .....................................................................
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
............................................................................................................
Regulator knob has continuous air leak ................................................................... 
Regulator will not shut off air outlet .......................................................................... 
 ............................................................. 
Squealing Sound ..................................................................................................... 21
Troubleshooting Codes
CODE POSSIBLE CAUSE POSSIBLE SOLUTION
1 Pressure switch does
not shut off motor
when compressor
reaches cut-out
pressure
Set the Auto/Off switch to OFF, if the unit does not shut
off contact a D
e

e

authorized service center.
2 Pressure switch cut-
out too high
Contact a D
e

e

authorized service center.
Tube fittings are not
tight enough
Tighten fittings where air can be heard escaping. Check
fittings with soapy water solution. Do Not Overtighten.
4 Defective air tank 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
e

e

authorized service center.
6 Defective safety valve Operate safety valve manually by pulling on ring. If valve still
leaks, it must be replaced.
7 Regulator is not
adjusted correctly for
accessory being used
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.
8 Prolonged excessive
use of air
Decrease amount of air usage.
FIG. 5
C
A
B
FIG. 1
FIG. 3
FIG. 4
FIG. 2
D
H
I
E
F
J
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