Instruction manual ESPAÑOL: PÁGINA 27 FRANÇAIS: PAGE 53 Oil Lube Two Stage Air Compressor MODEL C7550 To learn more about Porter-Cable visit our website at: http://www.porter-cable.com IMPORTANT Please make certain that the person who is to use this equipment carefully reads and understands these instructions before starting operations. The Model and Serial No. plate is located on the frame. Record these numbers in the spaces below and retain for future reference. Model No. Type Serial No.
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 below. Please read the manual and pay attention to these symbols. Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
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 operation instructions before using this equipment. HAZARD WARNING: Risk of explosion or fire What Could Happen How To Prevent It It is normal for electrical contacts within the motor and pressure switch to spark.
HAZARD 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 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. Failure to properly drain condensed water from tank, causing rust and thinning of the steel tank.
HAZARD WARNING: Risk of Electrical Shock What Could Happen How To Prevent It Your air compressor is powered by electricity. Like any other electrically powered device, If it is not used properly it may cause electric shock. Never operate the compressor outdoors when it is raining or in wet conditions. Never operate compressor with protective covers removed or damaged. Repairs attempted by unqualified personnel can result in serious injury or death by electrocution.
HAZARD WARNING: Risk of Burns What Could Happen How To Prevent It 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. Touching exposed metal such as the compressor head or outlet tubes, can result in serious burns.
HAZARD WARNING: Risk of Serious Injury or Property Damage When Transporting Compressor (Fire, Inhalation, Damage to Vehicle Surfaces) What Could Happen How To Prevent It 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. Always place COMPRESSOR on a protective mat when transporting to protect against damage to vehicle from leaks.
SPECIFICATIONS Model No. Horsepower Peak Voltage-Single Phase Minimum Branch Circuit Requirement *Fuse Type Air Tank Capacity, Gallons Approximate Cut-in Pressure Approximate Cut-out Pressure SCFM @ 100 psig SCFM @ 175 psig C7550 7.0 240V 30 amps Time Delay 80 ASME, Vertical 140 PSIG 175 PSIG 15.6 15.2 GLOSSARY 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.
ASSEMBLY Contents of Carton 1 - Air Compressor 1 - Parts bag containing: 1 - Operator’s Manual 1 - Parts Manual 4 - 5/8" Washers Tools Required for Assembly 1 - 9/16" socket or open end wrench 1 - Electric drill Unpacking 1. Remove all packaging. It may be necessary to brace or support one side of the outfit when removing the pallet because the air compressor will have a tendency to tip. 2. Remove and discard the (4) screws and washers holding the compressor to the pallet. 3.
INSTALLATION HOW TO SET UP YOUR UNIT Location of the Air Compressor • • • • Locate the air compressor in a clean, dry, and well ventilated area. Located the air compressor at least 12" away from the wall or other obstructions that will interfere with the flow of air. Locate the air compressor as close to the main power supply as possible to avoid using long lengths of electrical wiring. NOTE: Long lengths of electrical wiring could cause power loss to the motor.
Wiring Instructions Risk of Electrical Shock. Improper electrical grounding can result in electrical shock. The wiring should be done by a qualified electrician A qualified electrician needs to knows the following before wiring: 1. The amperage rating of the electrical box should be adequate. Refer to the Specification Chart, in the parts manual, for this information. 2. The supply line should have the same electrical characteristics (voltage, cycle, phase) as the motor.
Air Distribution System Risk of Bursting. Plastic or PVC pipe is not designed for use with compressed air. Regardless of its indicated pressure rating, plastic pipe can burst from air pressure. Use only metal pipe for air distribution lines. The next figure represents a typical air distribution system. The following are tips to remember when setting up the air compressor’s air distribution system. ● Use pipe that is the same size as the air tank outlet.
OPERATION Know Your Air Compressor READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR UNIT. Compare the illustrations with your unit to familiarize yourself with the location of various controls and adjustments. Save this manual for future reference. Pressure Switch On/Auto/Off Switch Tank Pressure Gauge Safety Valve Globe Valve Description of Operation Become familiar with these controls before operating the unit.
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: The drain valve is located at the Drain base of the air Valve tank and is used to drain condensation at the end of each use. Check Valve: When the air compressor is operating, the check valve is "open", allowing compressed air to enter the air tank.
2. 3. 4. 5. 6. 7. 8. 9. Check oil level in pump. See "Oil" paragraph in the "Maintenance" section for instructions. Recheck all wiring. Make sure wires are secure at all terminals connections. Make sure all contacts move freely and are not obstructed. Open the globe valve fully to permit air to escape and prevent air pressure build up in the air tank during the break-in period. Move the On/Auto/Off lever to "On/Auto" position. The compressor will start. Run the compressor for 20 minutes.
MAINTENANCE Customer Responsibilities Before each use Check Safety Valve Daily or Every Every Every Every after 100 Yearly 40 8 160 each hours hours hours hours use ● ● Drain Tank Oil Leaks Check Oil Change Oil Unusual Noise and/or Vibration Air Filter Drive Belt-Condition Motor Pulley/Flywheel alignment Air compressor pump intake and exhaust valves Inspect air lines and fittings for leaks ● ● ● ● ●1 ● ● ● ● Head Bolts - Check the torques of the head bolts after the first five hours of operation.
To Drain Tank Checking NOTE: Operation of the air compressor will cause condensation to build up in the air tank. Always drain tank on a washable surface or in a suitable container to prevent damaging or staining surfaces. 1. Set the On/Auto/Off lever to "Off". 2. Close the globe valve. 3. Remove the air tool or accessory. 4. Open the globe valve and allow the air to slowly bleed from the air tank until tank pressure is approximately 20 psi. 5. Close the globe valve. 6.
Air Filter - Inspection and Replacement Hot surfaces. Risk of burn. Compressor heads are exposed when filter cover is removed. Allow compressor to cool prior to servicing. Keep the air filter clean at all times. Do not operate the air compressor with the air filter removed. A dirty air filter will not allow the compressor to operate at full capacity. Keep the air filter clean at all times. 1. Remove air filter. 2. Remove the air filter cover. 3. Remove the air filter from filter cover.
7. Motor Pulley/Flywheel Alignment NOTE: Once the motor pulley has been moved from its factory set location, the grooves of the flywheel and pulley must be aligned to within 1/16" to prevent excessive belt wear. The air compressor flywheel and motor pulley must be in-line (in the same plane) within 1/16" to assure belt retention within flywheel belt grooves. To check alignment, perform the following steps: 1.
SERVICE AND ADJUSTMENTS ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE PERFORMED BY TRAINED SERVICE TECHNICIAN. Risk of Unsafe Operation. Unit cycles automatically when power is on. When servicing, you may be exposed to voltage sources, compressed air, or moving parts. Before servicing unit unplug or disconnect electrical supply to the air compressor, bleed tank of pressure, and allow the air compressor to cool. To Replace or Clean Check Valve 1. 2. 3. 4. 5. 6.
STORAGE 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. 7. After the water has been drained, close the drain or drain valve. Before you store the air compressor, make sure you do the following: 1. Review the "Maintenance" section on the preceding pages and perform scheduled maintenance as necessary. 2. Set the On/Auto/Off lever to "Off". 3. Close the globe valve. 4. Remove the air tool or accessory. 5.
TROUBLESHOOTING Performing repairs may expose voltage sources, moving parts or compressed air sources. Personal injury may occur. Prior to attempting any repairs, unplug the air compressor and bleed off all air tank air pressure. PROBLEM Excessive tank pressure safety valve pops off. CAUSE Pressure switch does not shut off motor when compressor reaches "cutout" pressure. Pressure switch "cut-out" too high.
PROBLEM CORRECTION CAUSE Pressure reading It is normal for "some" on the regulated pressure drop to occur. pressure gauge (if equipped) drops when an accessory is used. If there is an excessive amount of pressure drop when the accessory is used, adjust the regulator as instructed in the Operation section. NOTE: Adjust the regulated pressure under flow conditions (while accessory is being used). Air leak from safety valve. Possible defect in safety valve.
PROBLEM Motor will not run. CORRECTION CAUSE Motor overload protection switch has tripped. Let motor cool off and overload switch will automatically reset. Tank pressure exceeds pressure switch "cut-in" pressure. Motor will start automatically when tank pressure drops below "cut-in" pressure of pressure switch. Check valve stuck open. Remove and clean, or replace. Loose electrical connections. Check wiring connection inside pressure switch and terminal box area.
PROBLEM CORRECTION CAUSE Knocking Noise. Possible defect in safety valve. Defective check valve. Remove and clean, or replace. Loose pulley. Tighten pulley set screw, see Parts manual for torque specifications. Loose flywheel. Tighten flywheel screw, see Parts manual for torque specifications. Compressor mounting screws loose. Tighten mounting screws,see Parts manual for torque specifications. Check belt tension, see Adjusting Belt Tension in the Maintenance section. Loose belt.
LIMITED WARRANTY PORTER-CABLE CORPORATION warrants to the original purchaser that all products covered under this warranty are free from defects in material and workmanship. Products covered under this warranty include air compressors, air tools, service parts, pressure washers, and generators, which have the following warranty periods: 3 YEARS - Limited warranty on 2-stage oil-free air compressor pumps that operate at 1725 RPM. 2 YEARS - Limited warranty on oil-lubricated air compressor pumps.
