Installation Guide
Tools Needed:
- Adjustable wrench set
- Level
- Screwdrivers (flat and Phillips)
- Pipe wrench
- Tape measure
- Air pressure gauge
Step-by-Step Installation
- Choose Installation Location: Select a well-ventilated location with solid, level concrete flooring and adequate clearance for maintenance.
- Uncrate and Inspect: Remove all shipping materials and inspect for any damage during transit. Check all components against packing list.
- Foundation Preparation: Install on a solid concrete foundation using appropriate anchor bolts. Ensure unit is level in all directions.
- Electrical Connection: Connect to appropriate power supply (see specifications). All electrical work must be performed by a licensed electrician.
- Air System Connection: Install proper air lines using recommended pipe size. Include shut-off valves, drains, and filters as needed.
- Oil Check: Verify proper oil level in crankcase before initial startup. Use only recommended compressor oil.
- Initial Startup: Perform initial startup following proper break-in procedures. Check for leaks and monitor pressure settings.
Specifications
| Model Series | QT-7.5 |
| Type | Reciprocating Piston Air Compressor |
| Finish | Industrial Blue / Quincy Gold |
| Horsepower | 7.5 HP |
| Noise Level | 78 dB(A) at 1 meter |
| Control Type | Pressure Switch with Magnetic Starter |
| Tank Capacity | 80 Gallon ASME |
| Air Delivery | 24.1 CFM at 175 PSI |
| Max Pressure | 175 PSI |
| Power Requirements | 230V, 60Hz, 3-Phase |
| Dimensions (LxWxH) | 72 x 36 x 68 inches |
| Weight | 650 lbs |
| Pump Type | Two-Stage, Oil-Lubricated |
Warranty Information
- Full Warranty: 2 years parts and labor
- Pump Warranty: 5 years on Quincy QP pump
- Tank Warranty: Lifetime on ASME tank
- Additional Coverage: Optional extended warranty available
For warranty service, contact Quincy Compressor Customer Service at 1-800-543-HELP or visit QuincyCompressor.com
Key Features
QP Pump Technology
Quincy's proprietary QP pump features large diameter crankshaft, ductile iron connecting rods, and pressure-lubricated design for maximum durability and efficiency.
Two-Stage Compression
Provides cooler operation and higher efficiency by compressing air in two stages with intercooling between stages for reduced moisture and increased performance.
Pressure Lubrication System
Full pressure lubrication system ensures all critical components receive proper oil flow, extending pump life and reducing maintenance requirements.
ASME Certified Tank
Heavy-duty 80-gallon ASME certified air receiver tank with lifetime warranty provides ample air storage for demanding applications.
Thermal Protection
Built-in thermal overload protection on motor and automatic shut-off features prevent damage from overheating or excessive cycling.
Easy Maintenance Design
Large access doors, easy-to-reach valves, and clearly marked service points simplify routine maintenance and inspection procedures.
Performance Specifications
CFM at 100 PSI
28.5 CFM - Ideal for continuous tool operation
CFM at 150 PSI
25.3 CFM - Suitable for industrial applications
Duty Cycle
100% Duty Cycle - Designed for continuous operation
Pump RPM
870 RPM - Slow-running for extended life
Oil Capacity
2.5 Quarts - Large sump for better cooling
Air Outlet
1" NPT - Large port for minimal pressure drop
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Compressor won't start | Power issue, pressure switch fault, thermal overload | Check power supply, reset overload, inspect pressure switch |
| Low air pressure | Air leaks, worn valves, intake filter clogged | Check for leaks, inspect valves, clean/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 ventilation | Clean cooling surfaces, check oil level, improve ventilation |
| Oil in air lines | Worn piston rings, overfilled oil, wrong oil type | Check rings, adjust oil level, use recommended oil |
| Excessive cycling | Air leaks, large demand, pressure switch adjustment | Find/fix leaks, reduce demand, adjust pressure switch |
Maintenance Codes & Indicators
- OL: Overload condition - Check motor and reset overload
- LO: Low oil pressure - Check oil level and pump
- HT: High temperature - Allow to cool, check ventilation
- PS: Pressure switch fault - Inspect and adjust switch
- AF: Air filter restriction - Clean or replace filter
- VL: Valve leakage - Inspect and replace valves as needed
Manual Downloads
Current Model Manuals
QT-7.5
7.5HP Two-Stage Compressor
QT-10
10HP Industrial Compressor
QT-5
5HP Workshop Compressor
QT-7.5V
7.5HP Vertical Tank
Popular Previous Models
QT-7.5 Legacy
7.5HP Classic Series
QT-7
7HP Industrial Compressor
QR-7.5
7.5HP Rotary Series
QT-7.5P
7.5HP Portable Version