Luxaire Furnace Manual TG9S

The Luxaire TG9S is a high-efficiency gas furnace series featuring variable-speed blower technology, AFUE ratings up to 96%, two-stage gas valve operation, durable heat exchanger construction, quiet operation, diagnostic LED system, and compatibility with various thermostat controls. Designed for residential heating applications with natural gas or propane capability. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Technical Specifications 5. Controls and Settings 6. Venting and Combustion Air 7. Operation Instructions 9. Maintenance Procedures 10. Regulatory Information 11. Troubleshooting Guide

Features at a Glance

Key components: Two-stage gas valve, variable-speed ECM blower motor, aluminized steel heat exchanger, integrated control board, pressure switches, flame sensor, igniter, and diagnostic LED.

Feature	Description
Two-stage gas valve	Provides high and low fire operation for improved comfort and efficiency
Variable-speed blower	ECM motor for quiet operation and precise airflow control
Heat exchanger	Durable aluminized steel construction with tubular design
Diagnostic LED	Flashing code system for troubleshooting
Pressure switches	Safety devices to verify proper venting operation
Flame sensor	Detects burner flame for safety shutdown if needed
Hot surface igniter	Silicon carbide igniter for reliable ignition
Gas connection	1/2" NPT for natural gas or propane
Electrical connection	120V AC, 60Hz standard household power
Thermostat connections	Standard terminals for conventional and advanced thermostats

Installation Requirements

Unpack and inspect furnace for shipping damage. Verify proper location and clearances.

Location requirements: Indoor installation only, minimum clearances as specified in manual
Venting: PVC pipe required for direct vent or conventional venting per local codes
Gas connection: Use approved pipe compound on male threads only
Electrical: 120V AC dedicated circuit required with proper grounding
Ductwork: Properly sized and sealed duct system for optimal performance

WARNING! Installation must be performed by qualified HVAC technician. Gas furnaces can produce carbon monoxide. Proper venting is critical for safety.

First-Time Setup

After installation, perform initial startup and system verification.

Gas pressure adjustment: Verify and adjust manifold pressure per specifications
Blower settings: Configure dip switches for proper airflow and heating stages
Thermostat configuration: Connect compatible thermostat and set heating parameters
System checkout: Verify proper ignition sequence and temperature rise
Safety checks: Test limit switches, pressure switches, and flame rollout devices

CAUTION! Never bypass safety devices. Always verify proper operation before leaving installation.

Technical Specifications

AFUE Rating: Up to 96% efficiency
Input BTU/h: 40,000 to 120,000 depending on model
Stages: Two-stage heating, variable-speed blower
Gas Type: Natural gas or propane (conversion kit required)
Electrical: 120V AC, 60Hz, 15 amp circuit
Blower Motor: ECM variable-speed
Sound Rating: Ultra-quiet operation
Warranty: Limited lifetime heat exchanger, 10 years parts
Dimensions: Varies by model - refer to specific unit data plate

Controls and Settings

Integrated control board manages all furnace operations with diagnostic capabilities.

Control Board: LED status light, dip switch settings, terminal connections for thermostat, pressure switch inputs, gas valve control, blower motor control.

Dip Switch Settings: Heating airflow adjustments, blower off delays, staging configuration. Thermostat Connections: R, C, W, W2, G, Y terminals. Diagnostic Codes: LED flash patterns indicate specific fault conditions for troubleshooting.

Venting and Combustion Air

Proper venting is critical for safe operation and efficiency.

Vent pipe: Schedule 40 PVC required for direct vent applications
Vent termination: Minimum clearances from windows, doors, and air intakes
Combustion air: Adequate fresh air supply required for proper combustion
Vent slope: Horizontal runs must slope upward toward termination
Sealing: All joints must be properly sealed with approved cement

Tip: Always follow local building codes and manufacturer specifications for venting installations.

Operation Instructions

Normal heating operation and thermostat control.

Thermostat setting: Set to HEAT mode and desired temperature
Startup sequence: Control board initiates prepurge, ignition trial, and main burner operation
Two-stage operation: Furnace starts in low fire, advances to high fire if needed
Blower operation: Variable-speed motor adjusts airflow for optimal comfort
Shutdown: Thermostat satisfied, gas valve closes, blower continues for post-purge
Continuous fan: G terminal activation for continuous blower operation
Filter monitoring: Check filter monthly and replace when dirty
Seasonal startup: Annual professional inspection recommended

WARNING! Never operate furnace without proper venting and combustion air. Carbon monoxide poisoning hazard.

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

Monthly: Check and replace air filter as needed
Annual: Professional inspection and cleaning recommended
Burner inspection: Clean burners and verify proper flame pattern
Heat exchanger: Visual inspection for cracks or damage
Blower assembly: Clean blower wheel and housing
Drain system: Clear condensate trap and drain lines
Electrical: Check all connections and component operation
Venting: Inspect vent pipes for obstructions or damage

CAUTION! Always disconnect power before performing any maintenance. Gas valve service requires qualified technician.

Regulatory Information

UL certified for safety and performance. ANSI Z21.47 standards compliance. CSA International certified. Manufactured to meet or exceed DOE energy efficiency standards. For technical support, contact Luxaire at 1-800-572-2200 or visit www.luxaire.com. Installation must comply with local building codes and utility requirements.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, door switch	Check circuit breaker, thermostat settings, door switch engagement
No heat	Gas supply, igniter, flame sensor	Verify gas valve on, check igniter operation, clean flame sensor
Short cycling	Filter, airflow, limit switch	Replace dirty filter, check for blocked vents, verify limit switch operation
Blower won't run	Motor, capacitor, control board	Check motor operation, test capacitor, verify control board output
Lockout condition	Safety device activation	Reset power, check diagnostic LED code, identify fault condition
Unusual noises	Blower, heat exchanger, ductwork	Inspect blower wheel, check heat exchanger, examine duct connections

Reset Procedure: Turn power off for 30 seconds, then restore power to reset control board.

Service: 1-800-572-2200; www.luxaire.com