Installation Guide
Tools Needed:
- Adjustable wrench set
- Socket set
- Screwdrivers (flat and Phillips)
- Level
- Tape measure
- Pipe thread sealant
Step-by-Step Installation
- Choose Installation Location: Select a clean, dry, well-ventilated area with adequate clearance for maintenance access and proper airflow.
- Foundation Preparation: Install on a solid, level concrete foundation capable of supporting the compressor's weight and vibration.
- Uncrating and Inspection: Remove all shipping materials, inspect for damage, and verify all components are included.
- Electrical Connection: Connect to appropriate power supply (see specifications). All electrical work must comply with local codes and be performed by a qualified electrician.
- Air System Connection: Install proper air lines using recommended pipe size. Include a shut-off valve near the compressor outlet.
- Drain Installation: Connect condensate drain line to tank drain valve and route to appropriate drainage location.
- Check Oil Level: Verify proper oil level in crankcase before initial startup.
- Initial Startup: Perform initial startup following break-in procedures outlined in the manual.
Specifications
| Model Series | QT-340 |
| Type | Reciprocating Piston Air Compressor |
| Configuration | Two-Stage, Air-Cooled |
| Horsepower | 15 HP |
| Maximum Pressure | 175 PSI |
| Air Delivery (CFM) | 50.2 CFM at 175 PSI |
| Tank Capacity | 120 Gallon ASME |
| Number of Cylinders | 2 (Low Pressure) + 2 (High Pressure) |
| Power Requirements | 230/460V, 3 Phase, 60Hz |
| Full Load Amps | 40A @ 230V / 20A @ 460V |
| Dimensions (LxWxH) | 72 x 36 x 68 inches |
| Weight | 1,150 lbs |
| Sound Level | 78 dB(A) at 1 meter |
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 Quincy Compressor Customer Service at 1-800-345-8585 or visit QuincyCompressor.com
Key Features
Quincy QR-25 Series Pump
Heavy-duty industrial pump with cast iron construction, pressure lubrication system, and large diameter crankshaft for extended service life and reliable performance.
Two-Stage Compression
Provides greater efficiency and cooler operation by compressing air in two stages, reducing moisture accumulation and increasing overall system efficiency.
Pressure Lubrication System
Positive pressure lubrication ensures all moving parts receive proper lubrication even during startup, reducing wear and extending component life.
ASME Certified Tank
120-gallon ASME certified air receiver tank with safety valve and drain valve, manufactured to meet strict quality and safety standards.
Thermal Protection
Built-in thermal overload protection on motor prevents damage from overheating during extended operation or high ambient temperatures.
Vibration Isolation
Rubber isolation mounts reduce vibration transmission to the floor and surrounding structures, minimizing noise and preventing stress on components.
Control System Features
Magnetic Starter
Heavy-duty magnetic starter with overload protection for reliable motor starting and protection against electrical faults.
Pressure Switch
Adjustable pressure switch with automatic cut-in/cut-out control for maintaining consistent system pressure.
Check Valve
Prevents backflow of compressed air from tank to pump when compressor is shut off, protecting pump components.
Safety Valve
ASME certified safety relief valve provides protection against over-pressurization of the air receiver tank.
Automatic Tank Drain
Optional automatic condensate drain removes moisture from tank at regular intervals to prevent corrosion.
Pressure Gauge
Dual gauge system displays tank pressure and system pressure for accurate monitoring of compressor operation.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Compressor won't start | Power issue, pressure switch fault, thermal overload tripped | Check power supply, verify pressure switch settings, reset thermal overload |
| Low air pressure output | Air leaks, intake filter clogged, worn valves | Check for leaks, clean/replace intake filter, inspect valve plates |
| Excessive noise/vibration | Loose components, worn bearings, improper mounting | Tighten all fasteners, check bearings, verify proper installation |
| Overheating | Dirty cooling fins, inadequate ventilation, high ambient temperature | Clean cooling fins, improve ventilation, reduce operating time |
| Excessive oil consumption | Worn rings, leaking gaskets, overfilled crankcase | Check compression, inspect gaskets, verify proper oil level |
| Motor trips overload | Low voltage, excessive load, faulty starter | Check voltage supply, reduce load, test starter components |
Maintenance Schedule
- Daily: Check oil level, drain condensate from tank, inspect for leaks
- Weekly: Clean intake filter, check belt tension (if applicable), inspect safety valve
- Monthly: Check all fasteners, inspect electrical connections, test pressure switch
- Quarterly: Change compressor oil, clean cooling fins, inspect valves
- Annually: Replace air filter, check motor bearings, perform complete system inspection
- Every 2 Years: Replace safety valve, inspect tank interior for corrosion
Manual Downloads
Quincy 340 Series Manuals
QT-340
340 Series 15HP Air Compressor
QT-340V
340 Series Variable Speed Drive
QT-340D
340 Series Duplex System
QT-340S
340 Series Sound Enclosure
Related Quincy Models
QT-250
250 Series 10HP Air Compressor
QT-425
425 Series 25HP Air Compressor
QGS-50
50HP Rotary Screw Compressor
QSI-75
75HP Industrial Compressor