DeVilbiss MG7-OFTWIN General Manual
GENERAL MANUAL FOR
PERMANENTLY LUBRICATED
TWIN CYLINDER AIR COMPRESSORS
TABLE OF CONTENTS
SAFETY GUIDELINES ....................................................... 1
WARRANTY STATEMENT ................................................. 2
WARNING CHART ......................................................... 3-4
GLOSSARY ........................................................................ 5
DUTY CYCLE ..................................................................... 5
GENERAL INFORMATION ................................................ 5
ON-RECEIPT INSPECTION .............................................. 5
DESCRIPTION OF OPERATION ....................................... 6
ASSEMBLY (PORTABLE UNITS) ...................................... 6
Tools Needed for Assembly ......................................... 6
Installing Wheels, Handles
Rubber Foot Strip......................................................... 6
INSTALLATION AND BREAK-IN
PROCEDURES .............................................................. 7-9
Location of Air Compressor ........................................ 7
Removal of Shipping Boards and
Installation for Stationary Unit .................................... 7
Lubrication and Oil ..................................................... 7
Extension Cords ......................................................... 7
Voltage and Current Protection .................................. 8
Piping ......................................................................... 8
Grounding Instructions – (Portable) ........................... 8
Additional Regulators & Controls ............................... 8
Break-in Procedures ................................................... 8
Wiring Instructions-(Stationary) ................................. 9
Grounding Instructions (Stationary) ........................... 9
OPERATING PROCEDURES ........................................... 9
Daily Start-up Checklist .............................................. 9
MAINTENANCE ................................................................ 10
Air Filter - Inspection and Replacement ...................... 10
Safety Valve - Inspection ............................................ 10
Motor .......................................................................... 10
Check Valve Replacement ........................................... 1 0
STORAGE .......................................................................... 11
TROUBLESHOOTING GUIDE .................................... 12-13
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 the symbols to the
right. Please read the manual and
pay attention to these sections.
Call our Toll Free Number 1-800-888-2468, Ext 2, then 1, to obtain the location 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 information:
• Model number of your compressor
• Part number and description of the item you wish to purchase
Retain Original Sales Receipt as Proof of Purchase for Warranty Repair Work.
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.
Information for preventing damage to
equipment.
Information that you should pay special attention to.
MG7-OFTWIN REV. 11/5/98
DeVilbiss Air Power Company • 213 Industrial Drive • Jackson, TN 38301-9615
LIMITED WARRANTY
ONE YEAR FROM DATE OF PURCHASE
All merchandise manufactured by DeVilbiss Air Power Company is warranted to be free of defects in workmanship
and material which occur during the first year from the date of purchase by the original purchaser (initial user). Products
covered under this warranty include: air compressors, *air tools, accessories, service parts, pressure washers, and
generators used in consumer applications (i.e., personal residential household usage only).
Air compressors, *air tools, accessories, service parts, pressure washers, and generators used in commercial
applications (income producing) are covered by a 90 day warranty.
DeVilbiss Air Power will repair or replace, at DeVilbiss's option, products or components which have failed within the
warranty period. Repair or replacement, and service calls on 60 and 80 gallon air compressors, will be handled by
Authorized Warranty Service Centers and will be scheduled and serviced according to the normal work flow and
business hours at the service center location, and depending on the availability of replacement parts.
All decisions of DeVilbiss Air Power Company with regard to this policy shall be final.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
RESPONSIBILITY OF ORIGINAL PURCHASER (Initial User):
❏ Retain original cash register sales receipt as proof of purchase for warranty work.
❏ Use reasonable care in the operation and maintenance of the product as described in the Owners Manual(s).
❏ Deliver or ship the product to the nearest DeVilbiss Air Power Authorized Warranty Service Center.
Freight costs, if any, must be paid by the purchaser.
❏ Air compressors with 60 and 80 gallon tanks only will be inspected at the site of installation. Contact the nearest
Authorized Warranty Service Center, that provides on-site service calls, for service call arrangement.
❏ If the purchaser does not receive satisfactory results from the Authorized Warranty Service Center, the purchaser
should contact DeVilbiss Air Power Company.
THIS WARRANTY DOES NOT COVER:
❏ Merchandise sold as reconditioned, floor models and/or display models. Any damaged or incomplete equipment
sold "as is".
❏ Merchandise used as "rental" equipment.
❏ Merchandise that has become inoperative because of ordinary wear, misuse, freeze damage, use of improper
chemicals, negligence, accident, improper and/or unauthorized repair or alterations including failure to operate
the product in accordance with the instructions provided in the Owners Manual (s) supplied with the product.
*Air Tools: O-Rings and driver blades are considered ordinary wear parts, therefore, they are warranted for a
period of 45 days from the date of purchase.
❏ An air compressor that pumps air more than 50% during a one hour period is considered misuse because
the air compressor is undersized for the required air demand. Maximum compressor pumping time per hour is
30 minutes.
❏ Merchandise sold by DeVilbiss Air Power which has been manufactured by and identified as the product of
another company. The product manufacturer's warranty will apply.
❏ Repair and transportation costs of merchandise determined not to be defective.
❏ Cost associated with assembly, required oil, adjustments or other installation and start-up cost.
❏ ANY INCIDENTAL, INDIRECT OR CONSEQUENTIAL LOSS, DAMAGE, OR EXPENSE THAT MAY RESULT
FROM ANY DEFECT, FAILURE OR MALFUNCTION OF THE PRODUCT. Some states do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
❏ IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, ARE LIMITED TO ONE YEAR FROM THE DATE OF ORIGINAL PURCHASE. Some states do not allow
limitations on how long an implied warranty lasts, so the above limitations may not apply to you.
DeVilbiss Air Power Company
213 Industrial Drive • Jackson, TN 38301-9615 • Telephone: 1-800-888-2468 , Ext. 2 • FAX: 1-800-888-9036
Form: SP-100-E - 4/25/96
2 — ENG
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
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
PRESSURE SWITCH, SAFETY VALVE, OR
ANY OTHER COMPONENTS WHICH
CONTROL TANK PRESSURE.
WATER FROM THE TANK,
TO THE TANK.
MODIFICATIONS TO THE
RESULT IN
ATTACHMENTS & ACCESSORIES
EXCEEDING THE PRESSURE RATING OF AIR
TOOLS, SPRAY GUNS, AIR OPERATED ACCES-
SORIES, TIRES AND OTHER INFLATABLES CAN
CAUSE THEM TO EXPLODE 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.
MAKE ADJUSTMENTS OR PARTS SUBSTITUTIONS TO ALTER THE FACTORY SET
OPERATING PRESSURES.
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.
NEVER
RISK OF
EXPLOSION OR FIRE
RISK OF
ELECTRICAL SHOCK
IT IS NORMAL FOR ELECTRICAL CONTACTS
WITHIN THE MOTOR AND PRESSURE SWITCH
TO SPARK.
IF ELECTRICAL SPARKS FROM COMPRESSOR
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.
YOUR AIR COMPRESSOR IS POWERED BY
ELECTRICITY. LIKE ANY OTHER ELECTRICALLY
POWERED DEVICE, IF IT IS NOT USED
PROPERLY IT MAY CAUSE ELECTRIC SHOCK.
ALWAYS OPERATE THE COMPRESSOR IN A
WELL VENTILATED AREA FREE OF COMBUS-
TIBLE 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.
NEVER OPERATE THE COMPRESSOR OUTDOORS WHEN IT IS RAINING OR IN WET
CONDITIONS.
NEVER OPERATE COMPRESSOR WITH
COVER COMPONENTS REMOVED OR DAM-
AGED.
CONTINUE NEXT PAGE *
3 — ENG
HAZARD
WHAT CAN HAPPEN
HOW TO PREVENT IT
RISK OF
ELECTRICAL SHOCK
(cont’d)
RISK FROM
FLYING OBJECTS
RISK TO BREATHING
REPAIRS ATTEMPTED BY UNQUALIFIED PERSONNEL CAN RESULT IN SERIOUS INJURY OR
DEATH BY ELECTROCUTION.
ELECTRICAL GROUNDING:
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.
THE COMPRESSED AIR FROM YOUR COMPRESSOR 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.
FAILURE TO
ANY ELECTRICAL WIRING OR REPAIRS RE-
QUIRED ON THIS PRODUCT SHOULD BE
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
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 THE COMPRESSOR OFF AND
BLEED PRESSURE FROM THE AIR HOSE AND
TANK BEFORE ATTEMPTING MAINTENANCE,
ATTACHING TOOLS OR ACCESSORIES.
NEVER INHALE AIR FROM THE COMPRESSOR
EITHER DIRECTLY OR FROM A BREATHING
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 DESIGNED FOR USE
WITH YOUR SPECIFIC APPLICATION.
PROVIDES PROPER ELECTRICAL
RISK OF FALLING
RISK FROM
MOVING PARTS
RISK OF BURNS
A PORTABLE COMPRESSOR CAN FALL FROM
A TABLE, WORKBENCH OR ROOF CAUSING
DAMAGE TO THE COMPRESSOR WHICH
COULD RESULT IN SERIOUS INJURY.
THE COMPRESSOR CYCLES AUTOMATICALLY
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.
ALWAYS OPERATE COMPRESSOR IN A STABLE
SECURE POSITION TO PREVENT ACCIDENTAL
MOVEMENT OF THE UNIT. NEVER OPERATE
COMPRESSOR ON A ROOF OR OTHER
ELEVATED POSITION. USE ADDITIONAL AIR
HOSE TO REACH HIGH LOCATIONS.
ALWAYS TURN OFF THE COMPRESSOR, BLEED
PRESSURE FROM THE AIR HOSE AND TANK,
AND UNPLUG FROM ELECTRICAL OUTLET
BEFORE PERFORMING MAINTENANCE 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.
TMPCPOL — 5/1/97
4 — ENG
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 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.
Cut-In Pressure: While the motor is off, air tank pressure drops
as you continue to use your accessory or air tool.
DUTY CYCLE
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 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.”
U.L. Listed: Products with the U.L. mark are listed by Underwriters Laboratories, Inc. (U.L.). Samples of these products have
been evaluated by U.L. and meet the applicable U.L. standards
for safety.
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 air more than 50% of one hour
GENERAL INFORMATION
You have purchased an air compressor unit consisting of a 2
cylinder, single-stage air compressor pump, an air tank, and
associated controls and instruments.
This air compressor requires no oil. Now you can enjoy all the
benefits of having an air compressor without ever having to
purchase, add or change oil.
Your air compressor can be used for operating paint spray
is considered misuse, because the air compressor is undersized
for the required air demand. Maximum compressor pumping
time per hour is 30 minutes.
guns, air tools, caulking guns, grease guns, air brushes,
sandblaster, or inflating tires and plastic toys, spraying weed
killers, insecticides, etc. An air pressure regulator is necessary
for most of these applications.
Separate air transformers which combine the functions of air
regulation and/or moisture and dirt removal should be used
where applicable..
Separate air transformers which combine the functions of air
regulation and/or moisture and dirt removal should be used
where applicable.
ON-RECEIPT INSPECTION
DAMAGE: Each air compressor outfit is carefully tested and
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. If this product was
shipped directly to you, report any damages to carrier and
arrange for inspection of goods immediately.
5 — ENG
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