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6 - ENG

DESCRIPTION OF OPERATION

Extension Cords

Use extra air hose instead of an extension cord to avoid
voltage drop and power loss to the motor.

If an extension cord must be used, be sure it is:

a 3-wire extension cord that has a 3-blade ground-
ing plug, and a 3-slot receptacle that will accept
the plug on the compressor.

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.

Location of the Air Compressor

Your compressor comes to you completely assembled
and ready for use.  Operate the air compressor in a dry,
clean, cool and well ventilated area.  The air compressor
pump and case are designed to allow for proper cooling.
Clean or blow off dust or dirt that collects on the air
compressor.  A clean air compressor runs cooler and
provides longer service.  The ventilation openings on your
air compressor are necessary to maintain proper operat-
ing temperature.  Do not place rags or other containers on
or near these openings.

Voltage and Circuit Protection

See front cover.

than that desired, then bring it up to the desired pressure.
Depending on the air requirements of each particular
accessory, the outlet regulated air pressure may have to
be adjusted while operating the accessory.

Outlet Pressure Gauge: 

 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 or equal to the tank pressure. See “Oper-
ating Procedures”.

Tank Pressure Gauge: 

 The tank pressure gauge indi-

cates the reserve air pressure in the tank.

Cooling System:

  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 Intake Filter: 

 This unit requires no air filter due to the

unique design of the air intake system.

Drain Valve: 

 The drain valve is located at the base of the

air tank and is used to drain condensation at the end of
each use.

INSTALLATION AND BREAK-IN PROCEDURES

Air Compressor Pump: 

 To compress air, the piston

moves up and down in the cylinder. On the downstroke,
air is drawn in through the intake valves.  The exhaust
valves remain closed.  On the upstroke of the piston, air
is compressed.  The intake valves close and compressed
air is forced out through the exhaust valves, through the
outlet tube, through the check valve and into the air tank.
Working air is not available until the compressor has
raised the tank pressure above that required at the air
outlet.

Check Valve: 

 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.

Pressure Switch: 

 The pressure switch automatically

starts the motor when the 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” pres-
sure.

Regulator: 

 The air pressure coming from the air tank is

controlled by the regulator.  Turn the regulator knob
clockwise to increase pressure and counterclockwise to
decrease pressure. To avoid minor readjustment after
making a change in pressure setting, always approach
the desired pressure from a lower pressure.  When
reducing
from a higher to a lower setting, first reduce to pressure
less

Summary of Contents for MG1-UMCCOMP-3

Page 1: ...ion of the nearest Authorized Service Center for ordering repair parts and for warranty repairs When ordering repair parts from your local Authorized Service Center always give the following informati...

Page 2: ...l be inspected at the site of installation Contact the nearest Authorized Warranty Service Center that provides on site service calls for service call arrangement o If the purchaser does not receive s...

Page 3: ...MAKE ANY MODIFICATIONS TO THE TANK or its attachments Never attempt to repair a damaged or leaking tank Replace with a new tank The tank is designed to withstand specific operating pressures NEVER MAK...

Page 4: ...ctly or from a breathing device connected to the compressor WORK IN AN AREA equipped WITH GOOD CROSS VENTILATION Read and FOLLOW THE SAFETY INSTRUCTIONS provided on the label or safety data sheet FOR...

Page 5: ...ylinder single stage air compressor pump an air tank and associated controls and instruments Thisaircompressorrequiresnooil Nowyoucanenjoyall the benefits of having an air compressor without ever havi...

Page 6: ...ncoolingsystem Attheheartofthiscoolingsystem is an engineered fan It is perfectly normal for this fan to blowairthroughtheventholesinlargeamounts Youknow that the cooling system is working when air is...

Page 7: ...lt if the followingbreak ininstructionsare notcloselyfollowed The air compressor is equipped with a cord having a grounded wire with an appropriate grounding plug The plug must be used with an outlet...

Page 8: ...ur com pressor is ready for use 5 Alwaysoperatetheaircompressorinwell ventilated areas freeofgasolineorothersolventvapors Donot operate the compressor near the spray area TOO MUCH AIR PRESSURE CAUSES...

Page 9: ...air can be heard escaping Check fittings with soapy water solution DO NOT OVER TIGHTEN Airleaksatorinsidecheckvalve Defective or dirty check valve Air leaks in air tank or at air tank welds DO NOT DRI...

Page 10: ...essureexceedspressureswitch cut in pressure Check for proper gauge wire and cord length Wrong gauge wire or length of exten sion cord Loose electrical connections Check wiring connection inside pressu...

Page 11: ...11 ENG GENERAL MANUAL FOR PERMANENTLY LUBRICATED AIR COMPRESSOR SERVICE NOTES...

Page 12: ...GENERAL MANUAL FOR PERMANENTLY LUBRICATED AIR COMPRESSOR DeVilbiss Air Power Company 213 Industrial Drive Jackson TN 38301 9615 SERVICE NOTES...

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