Installation Guide
Tools Needed:
- Adjustable wrench set
- Pipe thread sealant
- Screwdrivers (flat and Phillips)
- Air pressure gauge
- Level
- Pipe cutter
Step-by-Step Installation
- Choose Installation Location: Select a clean, dry, well-ventilated area with sufficient clearance for maintenance access and proper airflow.
- Foundation Preparation: Place compressor on a solid, level concrete floor or vibration-absorbing pads to minimize noise transmission.
- Electrical Connection: Connect to appropriate power supply (check model specifications). Ensure proper grounding and circuit protection.
- Air System Connection: Install air lines using proper pipe size. Include shut-off valves, moisture traps, and pressure regulators as needed.
- Oil Check: Verify proper oil level according to manufacturer specifications before initial startup.
- Pressure Settings: Adjust pressure switch cut-in and cut-out settings according to application requirements.
- Initial Startup: Run compressor without load for 10-15 minutes to circulate oil and check for proper operation.
Specifications
| Model Series | QT Series Rotary Screw |
| Type | Industrial Air Compressor |
| Drive Type | Direct Drive / Belt Drive |
| Horsepower | 5 HP - 30 HP |
| Air Delivery (CFM) | 18 - 125 CFM @ 100 PSI |
| Maximum Pressure | 175 PSI |
| Tank Capacity | 60 - 240 Gallons |
| Noise Level | 70 - 85 dB(A) |
| Power Requirements | 230V/460V, 3 Phase, 60Hz |
| Dimensions (LxWxH) | Varies by model (60" x 30" x 48" typical) |
| Weight | 450 - 1800 lbs |
| Oil Capacity | 2 - 8 Gallons |
Warranty Information
- Full Warranty: 2 years parts and labor
- Air End Warranty: 5 years on rotary screw air end
- Extended Coverage: Optional extended warranty available
For warranty service, contact Quincy Customer Service at 1-800-331-1956 or visit QuincyCompressor.com
Key Features
Quincy QSI® Control System
Advanced microprocessor control system with digital display provides precise monitoring and control of compressor operation, including maintenance scheduling and fault diagnostics.
Rotary Screw Technology
Patented asymmetric screw profile delivers maximum efficiency with minimal energy consumption, providing continuous duty operation for industrial applications.
Energy Saving Modes
Automatic dual control modes (load/unload and modulation) optimize energy usage based on air demand, reducing operating costs by up to 30%.
Advanced Filtration System
Multi-stage filtration including intake filter, oil separator, and aftercooler ensures clean, dry compressed air with minimal oil carryover (3-5 ppm typical).
Quiet Operation
Sound-dampening enclosure and precision engineering reduce operational noise to as low as 70 dB(A), meeting OSHA requirements for workplace environments.
DuraGuard® Protection
Comprehensive protection system monitors temperature, pressure, and motor load to prevent damage and ensure reliable operation under varying conditions.
Compressor Technologies Explained
Rotary Screw
Continuous duty operation ideal for industrial applications requiring constant air supply
Reciprocating
Piston-type compressors for intermittent duty and high-pressure applications
Oil-Free
Specialty compressors for applications requiring 100% oil-free air
Variable Speed
Energy-efficient design that adjusts motor speed to match air demand
Two-Stage
Higher efficiency design with compression occurring in two stages
Portable
Mobile units with integrated tanks for job site applications
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Compressor won't start | Power issue, pressure switch fault, thermal overload | Check power supply, reset overload, verify pressure switch operation |
| Low pressure output | Air leaks, intake filter clogged, worn components | Check for leaks, clean/replace intake filter, inspect valves |
| Excessive noise/vibration | Loose mounting, worn bearings, improper alignment | Tighten mounts, check bearings, verify alignment |
| High operating temperature | Dirty cooler, low oil level, restricted airflow | Clean cooler fins, check oil level, ensure proper ventilation |
| Oil in air lines | Overfilled oil, failed separator, worn rings | Check oil level, replace separator element, inspect compression chamber |
| Frequent cycling | Air leaks, oversized compressor, control setting issues | Locate and repair leaks, adjust pressure settings, check control system |
Error Codes
- E01: High temperature - Check cooling system and oil level
- E02: Low pressure - Check for leaks and intake restriction
- E03: High pressure - Verify pressure switch settings
- E04: Motor overload - Check electrical connections and load
- E05: Sensor fault - Check temperature/pressure sensors
- E06: Communication error - Check control system wiring
Manual Downloads
Current Model Manuals
QT-54
5 HP Rotary Screw Compressor
QT-7.5
7.5 HP Industrial Compressor
QT-10
10 HP Variable Speed Drive
QT-15
15 HP Two-Stage Compressor
Popular Previous Models
QR-25
25 HP Reciprocating Compressor
QP-5
5 HP Portable Compressor
QOF-10
10 HP Oil-Free Compressor
QGS-30
30 HP Gasoline Compressor