Installation Guide
Tools Needed:
- Adjustable wrench set
- Pressure gauge
- Screwdrivers (flat and Phillips)
- Pipe thread sealant
- Level
- Air hose fittings
Step-by-Step Installation
- Choose Installation Location: Select a well-ventilated area with solid, level flooring away from flammable materials and excessive moisture.
- Unpack and Inspect: Remove all packaging materials and inspect for shipping damage. Check all components against packing list.
- Position the Compressor: Place on a level surface with adequate clearance (minimum 12 inches) on all sides for proper airflow and maintenance access.
- Electrical Connection: Connect to appropriate power supply (see specifications). Ensure proper grounding. Use dedicated circuit if required.
- Air System Setup: Install air filter on intake, connect air hose to outlet using thread sealant, and install pressure regulator if included.
- Oil Check: For oil-lubricated models, check oil level and fill to proper mark with recommended compressor oil.
- Initial Test Run: Run compressor without load for 10 minutes to break in. Check for leaks, unusual noises, and proper pressure buildup.
- Safety Valve Check: Verify safety valve operation by pulling test ring (wear eye protection).
Specifications
| Model Series | US-ACPRO-20G |
| Type | Stationary Air Compressor |
| Power Source | Electric Motor |
| Horsepower | 5 HP |
| Tank Capacity | 20 Gallon |
| Max Pressure | 175 PSI |
| CFM at 90 PSI | 12.5 CFM |
| CFM at 40 PSI | 14.5 CFM |
| Noise Level | 78 dB |
| Voltage | 230V, 60Hz, Single Phase |
| Amperage | 15A |
| Dimensions (HxWxD) | 48 x 24 x 30 inches |
| Weight | 185 lbs |
| Pump Type | Two-Stage, Oil-Lubricated |
Warranty Information
- Full Warranty: 2 years parts and labor
- Pump Warranty: 5 years on compressor pump
- Tank Warranty: Lifetime limited warranty on ASME tank
- Additional Coverage: Optional extended warranty available
For warranty service, contact US Air Compressor Customer Service at 1-800-555-COMPRESS or visit usaircompressor.com
Key Features
Two-Stage Pump System
Advanced two-stage compression provides higher efficiency, cooler operation, and longer pump life compared to single-stage compressors.
ASME Certified Tank
Heavy-duty 20-gallon ASME certified air tank with corrosion-resistant interior coating for maximum safety and durability.
Thermal Overload Protection
Built-in thermal overload protection automatically shuts off motor if temperature exceeds safe operating limits, preventing damage.
Low Oil Shutdown
Automatic shutdown system activates when oil level drops below minimum, protecting the pump from running dry and seizing.
Pressure Control System
Precise pressure switch with adjustable cut-in/cut-out settings and large dial gauge for accurate pressure monitoring.
Vibration Reduction
Heavy-duty rubber isolation mounts reduce vibration and noise transmission to the floor for quieter operation.
Application Capabilities
Air Tools
Power impact wrenches, ratchets, drills, and sanders for automotive and construction work
Spray Painting
Consistent pressure for professional-quality spray painting and finishing
Inflating
Quick inflation of vehicle tires, sports equipment, and inflatable items
Cleaning
Powerful air blast for cleaning machinery, workshops, and electronic equipment
Pneumatic Nailers
Reliable operation for framing, finishing, and roofing nail guns
Air Brushing
Precise pressure control for detailed airbrush artwork and models
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Compressor won't start | Power issue, pressure switch fault, thermal overload tripped | Check power supply, reset thermal overload, inspect pressure switch |
| Low pressure output | Air leaks, worn piston rings, clogged air filter | Check for leaks, inspect piston rings, clean or replace air filter |
| Excessive noise/vibration | Loose components, worn bearings, improper mounting | Tighten all fasteners, check bearings, ensure proper installation |
| Overheating | Dirty cooling fins, low oil, restricted airflow | Clean cooling fins, check oil level, ensure adequate ventilation |
| Oil in air lines | Overfilled oil, worn piston rings, incorrect oil type | Drain excess oil, inspect rings, use recommended compressor oil |
| Frequent cycling | Air leaks, faulty pressure switch, undersized tank | Locate and repair leaks, adjust or replace pressure switch |
| Motor hums but won't start | Low voltage, faulty capacitor, seized pump | Check voltage, test capacitor, check for pump seizure |
Maintenance Schedule
- Daily: Drain moisture from tank, check oil level, inspect for leaks
- Weekly: Check belt tension (if applicable), clean air filter, inspect hoses
- Monthly: Test safety valve, check motor brushes, inspect electrical connections
- Every 3 Months: Change oil (oil-lubricated models), clean cooling fins
- Every 6 Months: Replace air filter, check valve operation, inspect tank interior
- Annually: Complete system inspection, replace worn components, professional service
Manual Downloads
Current Model Manuals
US-ACPRO-20G
20 Gallon Pro Compressor
US-ACPRO-30G
30 Gallon Industrial Compressor
US-ACLT-10G
10 Gallon Portable Compressor
US-ACHD-60G
60 Gallon Heavy Duty Compressor
Popular Previous Models
US-AC20-OIL
20 Gallon Oil-Lubricated
US-AC15-OILLESS
15 Gallon Oil-Free
US-ACPAC-8G
8 Gallon Pancake Compressor
US-ACHOT-5G
5 Gallon Hot Dog Compressor
Accessory Manuals
US-AIRDRY-20
Air Dryer System
US-FILTER-PRO
3-Stage Air Filter
US-REGULATOR-D
Digital Pressure Regulator
US-MAINT-KIT
Maintenance Kit Guide