Delta CP503 User Manual

2.04 Mb


Air Compressor

(Model CP503)


PART NO. A08200 Rev. 0

Copyright © 2004 Delta Machinery

To learn more about DELTA MACHINERY


visit our website at:


For Parts, Service, Warranty or other Assistance, please call 1-866-422-4286.


This manual contains information that is important for you to know and understand. This information relates to protecting YOUR SAFETY and

PREVENTING EQUIPMENT PROBLEMS. To help you recognize this information, we use the symbols below. Please read the manual and pay attention to these symbols.

Indicates an

Indicates a potentially

imminently hazardous

hazardous situation

situation which, if not avoided, will result

which, if not avoided, may result inminor

in death or serious injury.

or moderate injury.



Indicates a potentially

Used without the

hazardous situation

safety alert symbol

which, if not avoided, could result in

indicates a potentially hazardous situation

death or serious injury.

which, if not avoided, may result in


property damage.




Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains

chemicals known (to the State of California) to cause cancer, birth defects or other reproductive harm. Some example of these chemicals are:

lead from lead-basedpaints

crystalline silica from bricks and cement and other masonry products

arsenic and chromium from chemically-treatedlumber

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, always

wear MSHA/NIOSH approved, properly fitting face mask or respirator when using such tools.

When using air tools, basic safety precautions should always be followed to reduce the risk of of personal injury.


2- ENG


Save these instructions

Improper operation or maintenance of this product could result in serious injury and property damage. Read and understand all warnings and operation instructions before using this equipment.


WARNING: Risk of explosion or fire

What Could Happen

It is normal for electrical contacts within the motor and pressure switch to spark.

If electricalsparks from compressorcome into contact with flammable vapors, they may ignite, causing fire or explosion.

Restricting any of the compressor ventilation openingswill cause serious overheating and could cause fire.

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.

How To Prevent It

Always operate the compressor in awell ventilated area free of combustible materials, gasoline, or solvent vapors.

If spraying flammable materials, locate compressor at least 20 feet away from spray area. An additional length of hose may be required.

Store flammable materials in a secure location away from compressor.

Never place objects against or on top of compressor. Operate compressor in an open area at least 12 inches away fromany wall or obstructionthat 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.

Always remain in attendance with the product when it is operating.

Always disconnect electrical power by moving pressure switch lever to the off position and drain tank daily or after each use.

3- ENG



WARNING: Risk of Bursting

Air Tank: The following conditions could lead to a weakening of the tank, and result in a violent tank explosion and could cause property damage or serious injury.

What Could Happen

Failure to properly drain condensed water from tank, causing rust and thinning of the steel tank.

Modifications or attempted repairs to the tank.

Unauthorized modifications to the unloader valve, safety valve, or any other components which control tank pressure.

Excessive vibration can weaken the air tank and cause rupture or explosion


Exceeding the pressure rating of air tools, spray guns, air operated accessories, tires, and other inflatables can cause them to explodeor fly apart, and could result in serious injury.

How To Prevent It

Drain tank daily or after each use. If tank develops a leak, replace it immediately with a new tank or replace the entire compressor.

Never drill into, weld, ormake any modifications to the tank or its attachments.

The tank is designed to withstand specific operating pressures. Never make adjustments or parts substitutions to alter the factory set operating pressures.

For essential control of air pressure, you must install a pressure regulator and pressure gauge to the air outlet (if not equipped) of your compressor. 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.


WARNING: Risk from Flying Objects

What Could Happen

The compressed airstream can cause soft tissue damageto exposed skin and can propeldirt, chips, loose particles, and small objects at high speed, resulting in property damage or personal injury.

How To Prevent It

Always wear ANSI Z87.1 approved safety glasses with side shieldswhen using the compressor.

Never point any nozzle or sprayer towardany part of the body or at other people or animals.

Always turn the compressor off and bleed pressurefrom the air hose and tank before attempting maintenance, attaching tools or accessories.


4- ENG


WARNING: Risk of Electrical Shock


What Could Happen

How To Prevent It



Your air compressor is powered by

Never operate the compressor outdoors



electricity. Like any other electrically

when it is raining or in wet conditions.



powered device, If it is not used

Never operate compressor with



properly it may cause electric shock.



protective covers removed or damaged.










Repairs attempted by unqualified

Any electrical wiring or repairsrequired



personnel can result in serious injury

on this product should be performed by



or death by electrocution.

authorized service center personnel




in accordance with national and local




electrical codes.







Electrical Grounding: Failure to provide

Make certain that the electrical circuit



adequate grounding to this product

to which the compressor is connected



could result in serious injury or death

provides proper electrical grounding,



from electrocution.

correct voltage and adequate fuse



See grounding instructions.








WARNING: Risk to Breathing

What Could Happen

How To Prevent It

The compressed air directly from your

Air obtained directly from the compressor

compressor is not safe for breathing.

should never be used to supply air for

The air stream may contain carbon

human consumption. In order to use air

monoxide, toxic vapors, or solid

produced by this compressor for breathing,

particles from the tank. Breathingthese

suitable filters andin-line safety

contaminants can cause serious injury

equipment must be properly installed.

or death.

In-line filters and safety equipment


used in conjunction with the compressor


must be capable of treating air to all


applicable local and federal codes prior


to human consumption.



Sprayed materials such as paint, paint

Work in an area with good cross

solvents, paint remover, insecticides,

ventilation. Read and follow the safety

weed killers, may contain harmful

instructions provided on the label or

vapors and poisons.

safety data sheets for the materials


you are spraying. Use a NIOSH/ MSHA


approved respirator designed for use with


your specific application.



5- ENG



WARNING: Risk of Burns

What Could Happen

Touching exposed metal such as the compressor head or outlet tubes, can result in serious burns.

How To Prevent It

Never touch any exposed metal parts on compressor during or immediately after operation. Compressor will remain hotfor several minutes after operation.

Do not reach around protective shrouds orattempt maintenance until unit has been allowed to cool.

HAZARD WARNING: Risk from Moving Parts

What Could Happen

Moving parts such as the pulley, flywheel, and beltcan cause serious injury if they come into contact with you or your clothing.

Attempting to operate compressor with damaged or missing partsor attempting to repair compressor with protective shrouds removed can expose you to moving parts and can result in serious injury.

How To Prevent It

Never operate the compressor with guards or covers which are damaged or removed.

Any repairs required on this productshould be performed by authorized service center personnel.


WARNING: Risk of Falling

What Could Happen

A portable compressor can fallfrom a table, workbench, or roof causing damage to the compressor and could result in serious injury or death to the operator.

How To Prevent It

Always operate compressor in a stable secure positionto prevent accidental movement of the unit. Never operate compressor on a roof or other elevated position. Use additional air hose to reach high locations.


6- ENG


WARNING: Risk of Serious Injury or Property Damage When Transporting Compressor

(Fire, Inhalation, Damage to Vehicle Surfaces)

What Could Happen

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.

How To Prevent It

Always place COMPRESSOR on a protective mat when transportingto protect against damage to vehicle from leaks. Remove COMPRESSOR from vehicle immediately upon arrival at your destination.


WARNING: Risk of Unsafe Operation

What Could Happen

Unsafe operation of your air compressor could lead to serious injury or death to you or others.

How To Prevent It

Review and understand all instructions and warningsin this manual.

Become familiar with the operation and controls of the air compressor.

Keep operating area clear of all persons, pets, and obstacles.

Keep children 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 features of this product.

Equip area of operation with a fire extinguisher.

Do not operate machine with missing, broken, or unauthorized parts.


7- ENG



Become familiar with these terms before operating the unit. CFM: Cubic feet per minute.

SCFM: Standard cubic feet per minute; a unit of measure of air delivery.PSIG: Pounds per square inch gauge; a unit of measure of pressure.

Code Certification: Products that bear one or more of the following marks: UL, CUL, ETL, CETL, have been evaluated by OSHA certified independent safety laboratories and meet the applicable Underwriters Laboratories Standards for Safety.

Cut-In Pressure: While the motor is off, air tank pressure drops as you continue to use your accessory. 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: Circuit carrying electricity from electrical panel to outlet.


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 than30-45minutes in any given hour.


Model No.


Running Horsepower






Voltage/Hertz/ Phase


Minimum Branch Circuit Requirement

15 amps

*Fuse Type

Time Delay

Air Tank Capacity

12 gallons

Approximate Cut-inPressure


Approximate Cut-outPressure







Accessories for this unit are available at the store the unit was purchased.


8- ENG

ASSEMBLY (does not apply to all units)

Assembly for "Tank" units

The wheels and handle do not provide adequate clearance, stability or support for pulling the unit up and

down stairs or steps. The unit must be lifted, or pushed up a ramp.

1.Submerge handle grip into warm soapy water to make installation easier. Remove handle grip from soapy water and slide onto handle.

2.Slide handle through holes in compressor saddle onto tabs. Secure with screws, one on each side.

Compressor Saddle




It will be necessary to


brace or support one


side of the outfit when installing the


wheels because the compressor will


have a tendency to tip over.


3. Install one shoulder bolt and one


nut for each wheel. Tighten securely.


The outfit will sit level if the wheels


are properly installed.


4. Clean and dry underside of air tank


leg opposite wheels. Remove the

Shoulder Bolt

protective strip from the adhesive


backed molded foot bumpers.

Molded Foot Bumpers

Attach the foot bumpers to the


bottom of leg on each end. Press


firmly into place.




Location of the Air Compressor

Locate the air compressor in a clean, dry and well ventilated area. The air compressor should be located at least 12" away from the wall or other obstructions that will interfere with the flow of air. 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.

9- ENG



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 (see illustrations). The plug must be used with an outlet that has been installed and grounded in accordance with all local codes and ordinances.

1.The cord set and plug with this unit contains a grounding pin. This plug MUST be used with a grounded outlet.

IMPORTANT: The outlet being used must be installed and grounded in accordance with all local codes and ordinances.

2.Make sure the outlet being used has the same configuration as the grounded plug. DO NOT




120 Volt U.S.A. Plug



240 Volt U.S.A. Plug

When used outside of the United States of America a conversion kit may be required for local use.

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.


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

Using extension cords is not recommended. The use of extension cords 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. If an extension cord must be used, be sure it is:

a 3-wireextension cord that has a3-bladegrounding plug, and a3-slotreceptacle that will accept the plug on the product

in good condition

no longer than 50 feet

14 gauge (AWG) or larger. (Wire size increases as gauge number decreases. 12 AWG, 10 AWG, and 8 AWG may also be used. DO NOT USE 16 OR 18 AWG.)