Table of Contents
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QSI-90/120/140
& QGV-20/25/30
This manual contains important safety information and should be made available to
all personnel who operate and/or maintain this product. Carefully read this manual
before attempting to operate or perform maintenance on this equipment.
Direct Drive Air Compressors
Instruction Manual
Manual No.
December 2012 Edition
2012200011
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Table of Contents
Troubleshooting
Related Manuals for Quincy QSI-140
Summarization of Contents
General Information
Safety Alert Symbols
Explains hazard symbols used to denote danger levels and safety precautions.
Safety Precautions
Lists essential safety rules for operating and maintaining the compressor to prevent injury or damage.
Spare Parts Ordering Information
Provides information on how to order genuine replacement parts and accessories for the compressor.
Serial/Model Identification Plate
Explains how to locate and use the unit's serial and model number for service inquiries.
Product Description
General Description
Overview of the QSI series rotary screw compressors, including horsepower range and key features.
The Compression Cycle
Detailed explanation of the rotary screw compressor's operational process from intake to discharge.
Air Flow
Describes the path of air through the compressor system from inlet to outlet for operation.
Cooling System
Explains the function and components of the air-cooled fluid cooler and aftercooler for temperature management.
Capacity Control System
Details how the compressor regulates its output based on air demand using the inlet valve.
Controller Options
Outlines the types of electronic and standard controls available for compressor operation and monitoring.
Control Lights, Indicators & Gauges
Identifies and explains the function of various indicators and gauges on the control panel for monitoring.
Operating Modes
Describes different modes of operation like Load/No Load and Auto Dual for efficient compressor management.
Electrical System
Details the electrical components, power supply, and safety considerations for the unit's installation.
Installation Procedures
Receiving and Inspection
Guidelines for inspecting the compressor upon arrival and reporting any shipping damage.
Moving to Installation Site
Safe practices for moving the compressor unit, including using forklift slots and lifting points.
Site Location Requirements
Criteria for selecting an appropriate installation location, considering ventilation, temperature, and clearance.
Shipping Supports Removal
Instructions for removing shipping supports before operating the compressor to prevent damage.
Piping Connections and Fit-up
Guidelines for making proper piping connections, avoiding strain, and using correct materials.
Pressure Vessels
Requirements for air receiver tanks, referencing ASME standards for safe operation.
Relief Valves
Information on installing and maintaining pressure relief valves for system safety and overpressure protection.
Electrical Installation
Requirements for electrical supply, wiring, grounding, and adherence to local codes.
Pneumatic Safety Devices
Details on pneumatic safety devices like circuit breakers and velocity fuses for preventing hose hazards.
Guards and Covers
Emphasizes the importance of guards for mechanical safety and proper installation before operation.
Manual Vent and Shutoff Valve
Instructions for installing manual valves for venting and isolation during maintenance.
Compressor Rotation Check
Procedure to verify correct clockwise rotation of the compressor motor to prevent damage.
Fan Rotation Check
Guidance on checking the centrifugal fan's rotation direction for optimal cooling performance.
Operating Procedures
Pre-Operation Checks
Essential checks and preparations before starting the compressor, ensuring readiness and safety.
Starting and Stopping Compressor
Procedures for normal and emergency start-up and shutdown of the compressor unit.
HMI Control Panel Operation
Detailed explanation of the HMI interface, menus, displays, and functions for operating the compressor.
Servicing and Maintenance
Maintenance Preparation and Safety
Procedures for safe preparation before performing maintenance and general safety guidelines.
Maintenance Schedule
Recommended maintenance tasks based on operating hours or time intervals for optimal performance.
Water Removal Procedures
Steps for draining water from the reservoir to prevent bearing damage and airend failure.
Air/Fluid Separator and Air Filter Service
Instructions for replacing the air/fluid separator and air filter elements as per schedule.
Shaft Seal Inspection and Replacement
Detailed steps for inspecting and replacing the compressor shaft seal, including special tools.
Pilot Valve and Pressure Setting Adjustment
Guidance on adjusting the differential pilot valve and pressure settings for proper modulation.
Electronic Control and Tubing Maintenance
Procedures for servicing electronic controls, HAT sensors, and maintaining air/fluid tubing.
Compressor Fluids
Fluid Specifications and Recommendations
Details on recommended compressor fluids (QuinSyn series) and their specific applications and properties.
Fluid Level and Lubrication
Procedures for checking fluid level and understanding lubrication principles for compressor longevity.
Fluid Filter and Fluid Life Factors
Information on fluid filter replacement and factors affecting compressor fluid lifespan, like temperature.
Fluid Analysis Program
Explanation of the fluid analysis program and its importance for monitoring fluid condition and warranty compliance.
Fluid Conversion and Flushing Procedures
Steps for cleaning, flushing, and converting between different compressor fluids safely and effectively.
Sampling Procedures and Analysis Report
Guidelines for taking fluid samples and understanding the analysis report for proactive maintenance.
Fluid Parameters Table
A table detailing acceptable ranges for various fluid properties and contaminants for different QuinSyn fluids.
Troubleshooting
Failure to Start and Shutdown Issues
Common causes and solutions for compressor start failures and unscheduled shutdowns.
Performance Problems
Troubleshooting for issues like low air delivery, pressure problems, and temperature excursions.
Clogging and Fluid Consumption Issues
Solutions for air/fluid separator clogging, air cleaner issues, and excessive fluid consumption.
Valve and Control Issues
Diagnosing problems related to inlet valves, unloading, and pressure reset for proper operation.
System and Fluid Water Issues
Addressing excessive water in the system and fluid, including relief valve and drain interval problems.
Dimensional Drawings
QSI Series Dimensional Drawings
Detailed diagrams showing dimensions for QSI compressor models (micro, dry, tank mounted, guage).
QGV Series Dimensional Drawings
Detailed diagrams showing dimensions for QGV compressor models (460V, dry, tank mounted).
Technical Data
QSI Series Technical Data
Specifications for QSI-90, QSI-120, and QSI-140 compressor models, including operating and energy data.
QGV Series Technical Data
Specifications for QGV-20, QGV-25, and QGV-30 compressor models, including performance and energy data.
Standard Terms and Conditions
Legal Effect and Order Modifications
Outlines terms of sale, order changes, payment terms, taxes, and legal aspects of the purchase.
Warranty and Liability Limitations
Details the standard warranty, exclusions, and limitations of seller's liability for equipment performance.
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