Installation Guide
Tools Needed:
- Adjustable wrench set
- Socket set
- Screwdrivers (flat and Phillips)
- Level
- Pipe thread sealant
- Air pressure gauge
Step-by-Step Installation
- Select Installation Location: Choose a clean, dry, well-ventilated area with adequate clearance for maintenance access and airflow.
- Prepare Foundation: Ensure a solid, level concrete foundation capable of supporting the compressor's weight and vibration.
- Uncrate and Position: Remove all shipping materials and position the compressor using proper lifting equipment.
- Electrical Connection: Connect to appropriate power supply (see specifications). All wiring must comply with local electrical codes.
- Air System Connection: Install proper air lines using recommended pipe size. Include shut-off valves and moisture traps.
- Oil Check: Verify proper oil level in crankcase before initial startup.
- Pressure Settings: Set cut-in and cut-out pressures according to application requirements.
- Initial Run Test: Run compressor through complete cycle to check for leaks, proper operation, and correct pressure settings.
Specifications
| Model Series | IRN375 |
| Type | Reciprocating Piston Air Compressor |
| Drive Type | Belt Drive |
| Horsepower | 7.5 HP |
| Air Delivery (CFM) | 24.5 CFM at 175 PSI |
| Maximum Pressure | 175 PSI |
| Tank Capacity | 80 Gallons |
| Number of Stages | Two Stage |
| Power Requirements | 230V, 60Hz, 3-Phase |
| Sound Level | 78 dB(A) |
| Dimensions (LxWxH) | 72 x 30 x 68 inches |
| Weight | 650 lbs |
| Oil Capacity | 2.5 Quarts |
Warranty Information
- Full Warranty: 2 years parts and labor
- Pump Warranty: 5 years on air end
- Tank Warranty: Lifetime on ASME coded tank
- Additional Coverage: Optional extended service plans available
For warranty service, contact Ingersoll Rand Customer Service at 1-800-847-4041 or visit ingersollrand.com
Key Features
Two-Stage Compression
Delivers higher efficiency and cooler operation by compressing air in two stages with intercooling between stages for reduced moisture and increased durability.
ASME Certified Tank
Heavy-duty 80-gallon ASME coded air receiver tank with corrosion-resistant interior coating and large drain valve for easy maintenance.
Intellisys Controller
Advanced microprocessor controller monitors system performance, provides diagnostic information, and optimizes compressor operation for energy savings.
Pressure Lubricated Pump
Full pressure lubrication system ensures proper oil flow to all critical components, extending pump life and reducing maintenance requirements.
Thermal By-Pass Valve
Protects the pump during startup by allowing the compressor to start unloaded, reducing electrical demand and mechanical stress.
Heavy-Duty Construction
Cast iron cylinders, forged steel crankshaft, and oversized bearings provide exceptional durability for continuous duty applications.
Control System Features
Auto/Stop Control
Automatic start-stop operation based on air demand with manual override capability
Dual Pressure Control
Independent adjustment of cut-in and cut-out pressures for optimal performance
Diagnostic Display
LED display shows operating hours, pressure, temperature, and error codes
Motor Protection
Built-in overload protection with automatic reset and phase monitoring
Maintenance Alerts
Automatic alerts for required maintenance including oil changes and filter replacement
Energy Saving Mode
Automatic shutdown during extended periods of no air demand
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Compressor won't start | Power issue, pressure switch fault, thermal overload | Check power supply, verify pressure switch settings, reset overload protector |
| Low air pressure | Air leaks, worn valves, intake filter clogged | Check for leaks, inspect valve plates, clean or replace air filter |
| Excessive noise/vibration | Loose components, worn bearings, improper mounting | Tighten all fasteners, check bearings, verify proper installation |
| Overheating | Dirty cooling fins, low oil, restricted airflow | Clean cooling surfaces, check oil level, ensure adequate ventilation |
| Excessive oil consumption | Worn rings, leaking gaskets, overfilling | Check compression, inspect for leaks, verify proper oil level |
| Water in air lines | Faulty aftercooler, inadequate drainage, high humidity | Check aftercooler function, drain tank regularly, install air dryer |
Error Codes
- E01: High temperature - Check oil level and cooling system
- E02: Low pressure - Check for leaks and pump condition
- E03: Motor overload - Check electrical supply and motor condition
- E04: Phase loss - Check three-phase power connection
- E05: Sensor fault - Check pressure/temperature sensors
- E06: Controller error - Reset controller or contact service
Manual Downloads
375 Series Manuals
IRN375
7.5HP Two-Stage Compressor
IRN375V
7.5HP Variable Speed
IRN375Q
7.5HP Quiet Series
IRN375P
7.5HP Portable
Related Models
IRN2475
5HP Two-Stage Compressor
IRN5075
10HP Industrial Compressor
IRN375SS
7.5HP Stainless Steel
IRN375X
7.5HP Extreme Duty