DeVillbiss Air Power Company LM7580V2C User Manual
OWNERS MANUAL FOR
TWO-STAGE
AIR COMPRESSOR
Model No.
LM7580V2C
Specification Chart
Model No.
Horsepower
Voltage/Hertz/Phase
Minimum Branch Circuit Requirement
*Fuse Type
Air Tank Capacity
Approximate Cut-in Pressure
Approximate Cut-out Pressure
SCFM @ 175 PSIG
Magnetic Starter
*A circuit breaker is preferred. Use only a fuse or circuit breaker that is the same rating as
the branch circuit the air compressor is operated on. If the air compressor is connected to
a circuit protected by fuses, use dual element time delay fuses (Buss Fusetron Type "T"
only).
In the unlikely event you should have a problem with this product or if you are missing any parts, it is not necessary
to return it to the store where you purchased it. Simply call our toll free number and talk with our Service
Representative.
Required (Included on Compressor)
LM7580V2C
7.5
240V/60 Hz/ 1 Ph.
30 Amp
Fusetron Type "T"
80 Gal. ASME
145 PSIG
175 PSIG
23.5
MGP-LM7580V2C — 7/21/97
OUR OFFICE HOURS ARE FROM
8 a.m. to 4:30 p.m. (CST)
MONDAY THROUGH FRIDAY
CALL TOLL FREE 1-800-888-2468, Ext. 2
DeVilbiss Air Power Company • 213 Industrial Dr. • Jackson, TN 38301-9615
TABLE OF CONTENTS
Page
SAFETY GUIDELINES .................................. 2
WARNING CHART ........................................ 3-4
SPECIFICATIONS ......................................... 5
GLOSSARY.................................................... 5
DUTY CYCLE ................................................ 5
GENERAL INFORMATION ............................ 6
ON-RECEIPT INSPECTION.......................... 6
DESCRIPTION OF OPERATION ................... 7
INSTALLATION AND
BREAK-IN PROCEDURES ........................... 8-11
Location of Air Compressor ........................ 8
Air Compressor Anchoring Methods .......... 8
Wiring Instructions and Diagram ................. 9
Voltage and Circuit Protection..................... 9
Break-in Procedures ................................... 10
Additional Regulators and Controls ............ 10
Lubrication and Oil....................................... 10
Piping and Diagram ..................................... 11
OPERATING PROCEDURES ........................ 12
Page
MAINTENANCE ............................................ 13
SERVICE INSTRUCTIONS ........................... 14-17
Air Filter-Inspection and Replacement ........ 14
Oil-Checking and Changing ......................... 14
Recommended Oils ..................................... 14
Check Valve-Inspection and Replacement .. 14-15
Safety Valve-Inspection and Replacement .. 15
Adjusting Belt Tension ................................. 16
Motor Pulley and Flywheel Alignment ......... 16
Additional Service........................................ 17
STORAGE ...................................................... 17
TROUBLESHOOTING GUIDE ...................... 18-21
COMPRESSOR DIAGRAM ........................... 2 2
COMPRESSOR PARTS LIST ........................ 23
COMPRESSOR PUMP DIAGRAM ................ 24
PUMP PARTS LIST ....................................... 25
AIR FILTER INSTALLATION ......................... 2 6
WARRANTY STATEMENT ............................ 27
HOW TO ORDER REPAIR PARTS ...... Back Cover
SAFETY GUIDELINES - DEFINITIONS
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 symbols to the right. Please read the
manual and pay attention to these
sections.
URGENT SAFETY INFORMATION - A HAZARD
THAT WILL CAUSE SERIOUS INJURY OR LOSS
OF LIFE.
IMPORTANT SAFETY INFORMATION - A
HAZARD THAT MIGHT CAUSE SERIOUS
INJURY OR LOSS OF LIFE.
2—ENG
Information for preventing damage to
equipment.
Information that you should pay special
attention to.
IMPORTANT SAFETY INSTRUCTIONS
• SAVE THESE INSTRUCTIONS •
IMPROPER OPERATION OR MAINTENANCE OF THIS PRODUCT COULD RESULT IN SERIOUS INJURY
AND PROPERTY DAMAGE. READ AND UNDERSTAND ALL WARNINGS AND OPERATING INSTRUCTIONS
BEFORE USING THIS EQUIPMENT.
HAZARD
RISK OF BURSTING
WHAT CAN HAPPEN
AIR TANK
THE FOLLOWING CONDITIONS COULD
LEAD TO A WEAKENING OF THE TANK, AND
RESULT IN A VIOLENT TANK EXPLOSION:
FAILURE TO PROPERLY DRAIN
1.
CONDENSED
CAUSING RUST AND THINNING OF THE
STEEL TANK.
2. MODIFICATIONS OR ATTEMPTED
REPAIRS
3. UNAUTHORIZED
THE PRESSURE SWITCH, SAFETY
VALVE, OR ANY OTHER COMPONENTS
WHICH CONTROL TANK PRESSURE.
WATER FROM THE TANK,
TO THE TANK.
MODIFICATIONS TO
ATTACHMENTS & ACCESSORIES
EXCEEDING THE PRESSURE RATING OF
AIR TOOLS, SPRAY GUNS, AIR OPERATED
ACCESSORIES, TIRES AND OTHER
INFLATABLES CAN CAUSE THEM TO EX-
PLODE OR 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 NEW
COMPRESSOR OUTFIT.
NEVER DRILL INTO, WELD, OR MAKE 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 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.
RISK OF
EXPLOSION OR FIRE
EXCESSIVE VIBRATION CAN WEAKEN THE
AIR TANK OF A STATIONARY COMPRESSOR
AND CAUSE AN EXPLOSION.
IT IS NORMAL FOR ELECTRICAL
CONTACTS WITHIN THE MOTOR AND
PRESSURE SWITCH TO SPARK.
IF ELECTRICAL SPARKS FROM COMPRES-
SOR COME INTO CONTACT WITH
FLAMMABLE VAPORS, THEY MAY IGNITE,
CAUSING FIRE OR EXPLOSION.
RESTRICTING ANY OF THE COMPRESSOR
VENTILATION OPENINGS WILL CAUSE
SERIOUS OVERHEATING AND COULD
CAUSE FIRE.
3—ENG
THE COMPRESSOR MUST BE PROPERLY
MOUNTED, SEE INSTALLATION PROCEDURES.
ALWAYS OPERATE THE COMPRESSOR IN
A WELL 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 FROM ANY WALL OR
OBSTRUCTION THAT WOULD RESTRICT
THE FLOW OF FRESH AIR TO THE
VENTILATION OPENINGS.
CONTINUE NEXT PAGE
*
HAZARD
WHAT CAN HAPPEN
HOW TO PREVENT IT
RISK OF
ELECTRICAL SHOCK
RISK FROM
FLYING OBJECTS
YOUR AIR COMPRESSOR IS POWERED BY
ELECTRICITY. LIKE ANY OTHER ELECTRI-
CALLY POWERED DEVICE, IF IT IS NOT USED
PROPERLY IT MAY CAUSE ELECTRIC SHOCK.
REPAIRS ATTEMPTED BY UNQUALIFIED
PERSONNEL CAN RESULT IN SERIOUS
INJURY OR DEATH BY ELECTROCUTION.
ELECTRICAL GROUNDING: FAILURE TO
PROVIDE ADEQUATE GROUNDING TO THIS
PRODUCT COULD RESULT IN SERIOUS
INJURY OR DEATH FROM ELECTROCUTION.
SEE GROUNDING INSTRUCTIONS.
THE
COMPRESSED AIR STREAM CAN CAUSE
SOFT TISSUE DAMAGE TO EXPOSED SKIN
AND CAN PROPEL DIRT, CHIPS, LOOSE
PARTICLES AND SMALL OBJECTS AT HIGH
SPEED, RESULTING IN PROPERTY DAMAGE
OR PERSONAL INJURY.
NEVER OPERATE THE COMPRESSOR OUTDOORS WHEN IT IS RAINING OR IN WET
CONDITIONS.
NEVER OPERATE COMPRESSOR WITH
COVER COMPONENTS REMOVED OR DAM-
AGE.
ELECTRICAL WIRING OR REPAIRS
ANY
REQUIRED ON THIS PRODUCT
PERFORMED BY AUTHORIZED SERVICE
CENTER PERSONNEL IN ACCORDANCE WITH
NATIONAL AND LOCAL ELECTRICAL CODES.
MAKE CERTAIN THAT THE ELECTRICAL
CIRCUIT TO WHICH THE COMPRESSOR IS
CONNECTED PROVIDES PROPER ELECTRICAL GROUNDING, CORRECT VOLTAGE AND
ADEQUATE FUSE PROTECTION.
ALWAYS WEAR ANSI Z87.1 APPROVED
SAFETY GLASSES WITH SIDE SHIELDS WHEN
USING THE COMPRESSOR.
NEVER POINT ANY NOZZLE OR SPRAYER
TOWARD ANY PART OF THE BODY OR AT
OTHER PEOPLE OR ANIMALS.
ALWAYS TURN OFF THE COMPRESSOR,
BLEED PRESSURE FROM THE AIR HOSE AND
TANK, AND DISCONNECT FROM POWER
SOURCE BEFORE PERFORMING MAINTE-
NANCE OR ATTACHING TOOLS AND ACCESSORIES.
SHOULD BE
RISK TO BREATHING
RISK FROM
MOVING PARTS
RISK OF BURNS
THE COMPRESSED AIR FROM YOUR COM-
PRESSOR IS NOT SAFE FOR BREATHING!
THE AIR STREAM MAY CONTAIN CARBON
MONOXIDE, TOXIC VAPORS OR SOLID PARTICLES.
SPRAYED MATERIALS SUCH AS PAINT, PAINT
SOLVENTS, PAINT REMOVER, INSECTICIDES,
WEED KILLERS, ETC.. CONTAIN HARMFUL
VAPORS AND POISONS.
THE COMPRESSOR CYCLES AUTOMATI-
CALLY WHEN THE PRESSURE SWITCH IS IN
THE ON/AUTO POSITION.
MOVING PARTS CAN CAUSE SERIOUS
INJURY OR DAMAGE IF THEY COME INTO
CONTACT WITH YOU OR YOUR CLOTHING.
ATTEMPTING TO OPERATE OR REPAIR
COMPRESSOR WITH PROTECTIVE SHROUDS
REMOVED CAN EXPOSE YOU TO MOVING
PARTS AND ELECTRICAL SHOCK.
TOUCHING EXPOSED METAL SUCH AS THE
COMPRESSOR HEAD OR OUTLET TUBE CAN
RESULT IN SERIOUS BURNS.
NEVER INHALE AIR FROM THE COMPRESSOR EITHER DIRECTLY OR FROM A BREATH-
ING DEVICE CONNECTED TO THE COMPRESSOR.
WORK IN AN AREA WITH GOOD CROSSVENTILATION. READ AND FOLLOW THE
SAFETY INSTRUCTIONS PROVIDED ON THE
LABEL OR SAFETY DATA SHEETS FOR THE
MATERIAL YOU ARE SPRAYING. USE A
NIOSH/MSHA APPROVED RESPIRATOR DE-
SIGNED FOR USE WITH YOUR SPECIFIC
APPLICATION.
ALWAYS TURN OFF THE COMPRESSOR,
BLEED PRESSURE FROM THE AIR HOSE AND
TANK, AND DISCONNECT FROM POWER
SOURCE BEFORE PERFORMING MAINTE-
NANCE OR ATTACHING TOOLS AND ACCESSORIES.
DO NOT REMOVE THE PROTECTIVE COVERS
FROM THIS PRODUCT. NEVER OPERATE THE
COMPRESSOR WITH GUARDS OR COVERS
WHICH ARE DAMAGED OR REMOVED.
ANY REPAIRS REQUIRED ON THIS PRODUCT
SHOULD BE PERFORMED BY AUTHORIZED
SERVICE CENTER PERSONNEL.
NEVER TOUCH ANY EXPOSED METAL PARTS
ON COMPRESSOR DURING OR IMMEDIATELY
AFTER OPERATION. COMPRESSOR WILL
REMAIN HOT FOR SEVERAL MINUTES AFTER
OPERATION.
DO NOT REACH AROUND PROTECTIVE
SHROUDS OR ATTEMPT MAINTENANCE UNTIL
UNIT HAS BEEN ALLOWED TO COOL.
SCWORPOL — 7/23/97
4—ENG
SPECIFICATIONS
Refer to cover page for the specifications of your compressor. Use only a fuse or circuit breaker that is the same rating
as the branch circuit the air compressor is operated on. If the compressor is connected to a circuit protected by fuses,
use dual element time delay fuses, as noted in specification chart.
Improper electrical installation of this product
may void its warranty and your fire insurance.
Have circuit wiring performed by qualified personnel such as a licensed electrician who is
familiar with the current national electric code
and any prevailing local electrical codes.
GLOSSARY
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.
ASME: American Society of Mechanical Engineers; made,
tested, inspected and registered to meet the standards of the
ASME.
California Code: Unit may comply with California Code
462 (L) (2)/(M) (2). Specification/Model Label is on the side
of the tank on units that comply with California Code.
DUTY CYCLE
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 re-starts is called “cut-in pressure.”
Cut-Out Pressure: When you turn on your air compressor
and it 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."
To Lock Out Power: Place a lock on the line power switch
so no one else can turn on the power.
All DeVilbiss Air Power manufactured air compressors
should be operated on not more than a 50% duty cycle.
This means an air compressor that pumps more than
50% of one hour, is considered misuse, because the air
compressor is undersized for the required air demand.
Maximum compressor pumping time per hour is 30
minutes.
5—ENG
GENERAL INFORMATION
You have purchased a complete compressor outfit
consisting of an air compressor, air tank, electric motor,
and associated controls and instruments. The outfit you
have selected is a stationary model and contains a two
stage air compressor pump.
Your new compressor outfit can be used for operating
paint sprayers, air tools, grease guns, air brushes,
caulking guns, sandblasters, inflating tires, etc.
An air pressure regulator is usually necessary for most
applications. An air line filter is normally required for
removal of moisture and oil vapor in compressed air
when a paint spray gun is used.
An in-line lubricator is often required for air tools to
prolong tool life.
Separate air transformers which combine the functions
ON-RECEIPT INSPECTION
of air regulation and/or moisture and dirt removal should
be used where applicable.
A regularly scheduled program of preventive maintenance will help provide the long life that has been
designed into your compressor outfit. Before operating
or performing any maintenance on your compressor,
refer to this manual. To keep your compressor in good
working order, refer to these publications often and
perform preventive maintenance steps as recommended.
Each air compressor outfit is carefully checked before
shipment. With improper handling, damage may result
in transit and cause problems in compressor operation.
Immediately upon arrival, check equipment for both
concealed and visible damages to avoid expenses being
incurred to correct such problems. This should be done
regardless of any visible signs of damage to the shipping
container. Report any damages to carrier and arrange for
inspection of goods immediately.
For the location or a listing of the nearest DeVilbiss Air
Power Authorized Warranty Service Center, call our toll
free number at 1-800-888-2468, Ext. 2, then 1.
6—ENG
DESCRIPTION OF OPERATION
Drain Valve: At the base of the air tank to drain condensation at the end of each use.
ON/AUTO-OFF Switch: Turn this switch ON to provide
automatic power to the pressure switch and OFF to remove
power.
Air Intake Filter: This filter is designed to clean air coming
into the pump. This filter must always be clean and ventilation
openings free from obstructions. See "Maintenance".
Air Compressor Pump: In two stage compressors, air is
first compressed to an intermediate pressure in the large bore
cylinder, and after passing through an inter-cooler, the air is
further compressed to a higher pressure in the smaller bore
cylinder. This process continues until the air tank pressure
reaches the factory set cutoff pressure. At that point the
pressure switch shuts the electric motor off.
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 Release Valve: The pressure release valve
located on the side of the pressure switch, is designed
to automatically release compressed air from the compressor
head and the outlet tube when the air compressor reaches
"cut-out" pressure or is shut off. If the air
is not released, the motor will try to start, but will be unable
to. The pressure release valve allows the motor
to restart freely. When the motor stops running, air will be
heard escaping from the valve for a few seconds. No air
should be heard leaking when the motor is running.
Pressure Switch: 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.
Shut-off Valve: Turn the knob counterclockwise to open
the valve and clockwise to close.
Air Tank Safety Valve: 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
off" at its factory set pressure (slightly higher than the
pressure switch cut-out setting).
Aftercooler Safety Valve: On two stage compressor
units, safety valve is provided to prevent over-pressurization
of the aftercooler. The valve will protect the aftercooler by
"popping off" at its factory set pressure.
Regulator: An air pressure regulator or a separate air
transformer which combines the functions of air regulation
and/or moisture and dirt removal is recommended for most
applications.
Tank Pressure Gauge: The tank pressure gauge indi-
cates the reserve air pressure in the tank. On outfits with no
pressure regulator, this is also the pressure available at the
air outlet.
7—ENG
INSTALLATION AND BREAK-IN PROCEDURES
Location of the Air Compressor
THE PUMP ASSEMBLY DOES NOT PROVIDE ADEQUATE STABILITY OR SUPPORT
FOR LIFTING THE UNIT. IF THE OUTFIT
MUST BE MOVED, USE THE TANK FOR
LIFTING.
This compressor should be permanently mounted in
place on a level floor. Operate the air compressor in a
clean, dry and well ventilated area. The air intake filter
must be kept clear of obstructions which could reduce air
delivery of the air compressor. The air compressor
should be located at least 12" away from walls or other
obstructions that could interfere with the flow of air
through the fan bladed flywheel. The air compressor
crankcase and head are designed with fins to provide
proper cooling.
The flywheel side of the outfit should be placed toward
the wall and protected with a totally enclosed belt guard.
In no case should the flywheel be closer than 12 to 18
inches from the wall or other obstruction that will interfere
with the flow of air through the fan bladed flywheel. The
area should allow space on all sides for air circulation
and for ease of normal maintenance. Keep the outfit
away from areas which have dirt, vapor and volatile fumes
in the atmosphere which may clog and gum the intake
filter and valves, causing inefficient operation. Where this
is not practical a remote air intake is recommended.
Air Compressor Anchoring
Methods
VIBRATION CAN WEAKEN THE AIR TANK
AND CAUSE AN EXPLOSION. THE COMPRESSOR MUST BE PROPERLY MOUNTED
AS ILLUSTRATED BELOW.
FLAT WASHER
ISOLATOR
WASHER
Anchoring of Vertical Unit
LAG SCREW
(NOT SUPPLIED)
TORQUE TO
5 TO 10 FT-LB
Note
Where a remote air intake is used,
enlarge the size of the air intake piping by one pipe size for each 10 feet of
length.
If humidity is high, an air filter can be installed to remove
excessive moisture. Closely follow instructions packaged with the filter for proper installation. It must be
installed as close as possible to the accessory.
The air compressor should be as near to air outlets as
possible in order to avoid long pipe lines. Do not place
the air compressor where heat is excessive.
To avoid voltage drop and power loss to the motor, use
extra air hose instead of an extension cord. Low voltage
can cause damage to the motor.
8—ENG
Vertical Units
Vertical air compressors must be bolted to the floor.
Bolting holes are provided in the base feet. Mount the air
compressor on a solid, level foundation. Support compressor weight evenly on all four feet. Solid shims may
be used if necessary.
INSTALLATION AND BREAK-IN PROCEDURES
Wiring Instructions
If your compressor unit is not equipped with a plug-in type
power cord, perform electrical wiring according to the
following instructions:
IMPROPER ELECTRICAL GROUNDING CAN
RESULT IN A RISK OF ELECTRICAL SHOCK.
WIRING SHOULD BE DONE BY A LICENSED
ELECTRICIAN IN ACCORDANCE WITH NATIONAL AND LOCAL CODES AND ORDINANCES.
Install the compressor outfit as close to the main power
supply as possible. This practice will avoid using long
lengths of electrical wiring for the power supply which can
cause power loss to the motor. When connecting wires
make sure that:
1.The amperage rating of the electrical box is adequate.
Refer to the Specification Chart (cover page) for your air
compressor outfit.
Wiring must be such that full motor nameplate voltage plus
or minus 10%, is available at the motor terminals during
starting. Refer to local codes for recommended wire sizes
for correct wire size and maximum wire run; undersize wire
causes high amp draw and overheating to the motor.
Electrical wiring must be located away
from hot surfaces such as the compressor
head, compressor cylinder, or compressor outlet tube.
Voltage and Circuit Protection
Refer to The Specification Chart for the voltage and circuit
protection requirements of your compressor. Use only a
fuse or circuit breaker that is the same rating as the branch
circuit the air compressor is operated on. If the compressor
is connected to a circuit protected by fuses, use only dual
element time delay fuses. See Specification Chart.
2.The supply line has the same electrical characteristics
(voltage, cycle, and phase) as motor.
Wiring of Compressor Units
Typical Wiring of Compressor Units
With 80 Gallons Capacity
IF REQUIRED
Typical schematic subject to all changes as dictated by local electrical codes and authorities.
NOTE: THESE OUTFITS DO NOT INCLUDE ANY
WIRING BECAUSE OF VARIOUS
INSTALLATION REQUIREMENTS.
9—ENG
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