Trane XB Furnace Manual

The Trane XB Furnace is a high-efficiency gas furnace designed for residential heating applications. Featuring advanced combustion technology, variable-speed blower motors, and durable construction, this furnace provides reliable warmth and energy savings. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-efficiency heat exchanger, variable-speed blower motor, electronic ignition system, multi-speed inducer motor, integrated control board.

Feature	Description
Heat Exchanger	Stainless steel construction for durability and efficiency
Blower Motor	Variable-speed ECM motor for quiet operation
Ignition System	Hot surface ignition for reliable startup
Inducer Motor	Multi-speed for proper combustion airflow
Control Board	Integrated diagnostics and safety controls
Gas Valve	Modulating for precise temperature control
Pressure Switches	Safety verification of proper venting
Flame Sensor	Ensures proper burner operation
Limit Switches	Prevents overheating conditions
Filter System	Standard 1-inch or 4-inch media filter compatibility

Installation

Unpack and inspect contents. Ensure proper location with adequate clearance.

1. Position furnace: Place on stable, level surface with proper clearances.
2. Connect gas line: Use black iron pipe with proper thread sealant.
3. Connect electrical: 120V AC power supply with proper grounding.
4. Connect venting: Use approved PVC or metal vent materials.
5. Connect ductwork: Ensure proper sizing and sealing.
6. Connect thermostat: Use 18-gauge thermostat wire.

WARNING! Gas appliances require professional installation. Follow all local codes and manufacturer specifications.

First-Time Setup

Power on furnace; follow startup sequence.

1. Verify gas supply: Ensure gas valve is open and pressure is correct.
2. Check electrical: Confirm proper voltage and grounding.
3. Set thermostat: Program desired temperature settings.
4. Test operation: Initiate heating cycle and verify proper function.
5. Check airflow: Verify proper airflow through registers.
6. Monitor operation: Observe complete heating cycle for any issues.

CAUTION! Carbon monoxide hazard - ensure proper venting and combustion air supply.

Specifications

• Model Series: XB80, XB90, XB95
• Input BTU/h: 40,000 - 120,000
• AFUE Rating: 80% - 95.5%
• Gas Type: Natural Gas or LP
• Electrical: 120V AC, 60Hz
• Blower Type: Variable-speed ECM
• Venting: PVC, CPVC, or metal
• Dimensions: Varies by model
• Weight: 90 - 150 lbs
• Sound Level: As low as 65 dBA

Controls and Settings

Access control board via front panel. Integrated diagnostic LED for troubleshooting.

Thermostat: HEAT/COOL/OFF, FAN AUTO/ON, temperature setting, program schedules.

Heating: Single-stage or two-stage operation based on model. Blower: Variable-speed control for optimal airflow. Safety: Pressure switches, limit controls, flame rollout protection. Diagnostics: LED flash codes for error identification. Settings: Blower delay, temperature rise, gas pressure adjustment.

Connecting Thermostat

Standard thermostat connections: R, W, Y, G, C.

1. Turn off power to furnace before wiring.
2. Strip thermostat wires 1/4 inch.
3. Connect R (24V power), W (heat), G (fan), C (common).
4. For cooling: Connect Y (cooling).
5. Secure wires and restore power.

Tip: Use color-coded thermostat wire for easy identification.

Operating Procedures

Standard heating operation with thermostat control.

1. Set thermostat to HEAT mode and desired temperature.
2. Furnace initiates pre-purge cycle (inducer motor runs).
3. Hot surface igniter heats up (glows orange).
4. Gas valve opens, burner ignites.
5. Flame sensor confirms ignition.
6. Blower motor starts after heat exchanger warms.
7. Heating continues until thermostat satisfied.
8. Gas valve closes, blower continues for post-purge.

WARNING! Never bypass safety controls. Regular professional maintenance required.

Maintenance Features

Self-diagnostics: LED error codes for quick troubleshooting. Filter reminder: Programmable filter change indicator. Service lights: Indicate required maintenance intervals.

Care & Cleaning

Turn off power before maintenance. Replace filters regularly. Keep area around furnace clear.

Monthly: Check and replace air filter if dirty.

Annual: Professional inspection and cleaning of burners, heat exchanger, and venting.

CAUTION! Gas appliances require qualified technician for internal cleaning and adjustments.

Regulatory Information

ANSI Z21.47: Certified for gas-fired central furnaces. UL 1995: Standard for heating and cooling equipment. Energy Star: Qualified models meet efficiency requirements. For support, visit www.trane.com or contact 1-800-554-6413. Installation must comply with National Fuel Gas Code NFPA 54 and local codes.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, door switch	Check circuit breaker, thermostat settings, ensure door closed properly.
No heat	Gas supply, ignition	Verify gas valve open, check for ignition attempts, inspect flame sensor.
Blower won't run	Motor, capacitor, control	Check for power to blower, inspect capacitor, verify control board output.
Short cycling	Filter, limit switch	Replace dirty filter, check for blocked vents, verify proper airflow.
Error codes flashing	Various faults	Count LED flashes and refer to diagnostic chart in manual.

Reset: Power cycle furnace by turning off power for 30 seconds.

Service: 1-800-554-6413; www.trane.com