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Related Manuals for Lennox G23Q3/4-125
Summarization of Contents
Safety and Warnings
General Safety Warnings
Crucial warnings about fire, explosion, and property damage if instructions are not followed.
Gas Leak Emergency Procedures
Steps to take if gas is smelled, emphasizing immediate action and professional contact.
Installation Requirements and Compliance
Regulatory and Code Compliance
Details on CSA, National Fuel Gas Code, and National Electric Code compliance for safe installation.
Installation Clearances and Safety
Specifies required safety clearances and precautions for installation around the furnace.
Environmental and Operational Guidelines
Guidelines for furnace placement, garage installation, grounding, and operational conditions.
General Information and Air Supply
Shipping and Damage Check
Instructions for checking equipment upon arrival and handling potential shipping damage.
Combustion Air Requirements
Details on providing adequate combustion air, including warnings and environmental contaminants.
Combustion Air in Confined Spaces
Confined Space Air Supply Methods
Methods for supplying combustion air to furnaces installed in confined spaces, from inside or outside.
Furnace Installation and Airflow
Furnace Setup and Location
Guidance on selecting an installation location, ensuring levelness, and checking blower motor mounting.
Return Air Ducting Guidelines
Rules for connecting return air ducts, including warnings about negative pressure and cross-contamination.
Filters and Return Air Configuration
Filter Installation Procedures
Instructions for installing filters and air filters in side and bottom return air applications.
Ductwork and Venting Fundamentals
Duct System Design and Installation
Guidelines for sizing and installing supply and return air duct systems for optimal performance.
Venting System Requirements
Comprehensive rules for venting, including compliance, types of vents, and specific requirements for masonry chimneys.
Venting Configurations
Common Venting with Masonry Chimneys
Detailed instructions and prohibitions for common venting with both tile-lined and metal-lined masonry chimneys.
Venting System Specifications
General Venting Installation Rules
Key requirements for vent sizing, routing, support, attachment, and separation from other systems.
Vent Capacity and Calculations
Information on using venting tables, accounting for elbows, offsets, and ensuring proper capacity.
Venting Maintenance and Horizontal Venting
Common Vent Removal and Testing
Procedure for safely removing a furnace from a common vent and testing the system's integrity.
Horizontal Venting Kit Installation
Instructions and wiring details for installing a side wall venting kit for horizontal furnace exhaust.
Gas Piping Installation and Safety
Gas Piping Installation Procedures
Detailed guidance on installing gas piping, including material, slope, support, and safety precautions.
Leak Detection and Pressure Testing
Procedures for checking gas piping connections for leaks and safe pressure testing methods.
Electrical Connections and Gas Pipe Sizing
Electrical Wiring and Grounding
Instructions for installing the field make-up box, ensuring proper electrical grounding, and connecting wiring.
Gas Pipe Capacity Table
Table providing gas pipe capacity based on nominal pipe size, length, and gas type.
Electrical Controls and Accessories
Accessory Wiring and Blower Speed
How to connect optional accessories and select blower speeds based on unit configuration.
Thermostat and Control Box Connections
Guidance on thermostat designations, control box connections, and installing disconnect switches.
SureLight Control Board Details
Control Board Terminal Designations
Explanation of terminal designations and functions on the SureLight integrated control board.
Furnace Wiring Diagrams
Schematic Wiring Diagram
Detailed schematic wiring diagram for the G23(X) furnace, including component connections and labels.
Blower Speed Selection Chart
Chart showing factory-connected speed taps for different furnace models and blower speeds.
Unit Start-Up and Safety Procedures
Field Wiring and Safety Precautions
Diagram for field wiring and essential safety warnings to follow before starting the unit.
Furnace Start-Up Steps
Step-by-step instructions for safely starting the furnace, including gas valve operation.
Operational Settings and Adjustments
Thermostat and Gas Valve Operation
How to operate the thermostat and gas valve, including safety checks before lighting.
Gas Pressure Adjustment
Procedure for checking and adjusting gas pressure, calculating gas flow, and identifying adjustment points.
High Altitude and System Adjustments
Altitude Pressure Settings
Information on adjusting gas pressure regulator based on installation altitude and pressure switch selection.
Furnace Component Settings
Details on adjusting thermostat anticipator, fan control, and checking temperature rise for optimal performance.
Service and Troubleshooting
Failure to Operate Checklist
A step-by-step checklist to diagnose and resolve common unit failure to operate issues.
Routine Maintenance Procedures
Guidelines for periodic service, including blower cleaning, filter replacement, and heat exchanger/burner maintenance.
Heat Exchanger and Burner Cleaning
Cleaning Procedure Steps
Detailed steps for cleaning the heat exchanger and burners using specialized tools.
Parts and Service Information
Repair Parts List
List of available repair parts for the G23(X) furnace, categorized by component.
SureLight Troubleshooting
Heating Sequence Troubleshooting
Diagnostic flowchart for troubleshooting the heating sequence of operation based on LED indicators and system states.
Cooling Sequence Troubleshooting
Cooling Sequence Operation Troubleshooting
Diagnostic flowchart for troubleshooting the cooling sequence of operation, identifying abnormal modes and LED signals.
Fan Sequence Troubleshooting
Continuous Fan Sequence
Flowchart detailing the sequence of operation for continuous fan mode and troubleshooting steps.
Start-Up and Performance Checklist
Performance Checklist
A comprehensive checklist for performing initial start-up and performance checks on the furnace.
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