Trane XE70 Furnace Manual

The Trane XE70 is a high-efficiency gas furnace designed for residential heating applications. This 80% AFUE furnace features a durable heat exchanger, electronic ignition system, variable-speed blower motor, and multiple safety controls. Available in various sizes from 40,000 to 120,000 BTU/hr, the XE70 provides reliable heating performance with quiet operation. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Durable aluminized steel heat exchanger, hot surface ignition, multi-speed direct drive blower, flame rollout switches, pressure switches, limit controls.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in dry, clean area with adequate clearance for service.
2. Combustion Air: Ensure adequate fresh air supply per local codes.
3. Venting: Install proper Category I vent system with correct slope.
4. Gas Supply: Connect to properly sized gas line with sediment trap.
5. Electrical: Connect to 120V AC power with proper grounding.
6. Ductwork: Ensure proper return and supply duct sizing.

WARNING! Gas furnaces produce carbon monoxide. Proper installation and venting are critical for safety.

First-Time Setup

Initial startup must be performed by qualified technician.

1. Verify installation: Check all connections, clearances, and venting.
2. Gas pressure: Adjust manifold pressure to specifications on rating plate.
3. Blower speed: Set appropriate heating speed for application.
4. Check operation: Verify proper ignition, flame, and safety controls.
5. Measure temperature rise: Ensure within specified range on rating plate.
6. Test safety devices: Verify limit controls and rollout switches function properly.

CAUTION! Never operate furnace without proper venting and combustion air.

Specifications

• Models: TUD, TUE series in various sizes
• Input Capacity: 40,000 to 120,000 BTU/hr
• AFUE: 80%
• Gas Type: Natural gas (convertible to LP with kit)
• Electrical: 120V AC, 60Hz, 1.5-6.0 amps
• Static Pressure: 0.1 to 0.8 inches water column
• Temperature Rise: 35°F to 65°F
• Venting: Category I, minimum 5-inch diameter
• Sound Level: Less than 70 dBA
• Dimensions: Varies by model (typically 21"W x 21"D x 45"H)

Controls and Settings

Integrated furnace control board manages all operations with diagnostic capabilities.

Thermostat Connections: R (24V), W (Heat), G (Fan), C (Common)

Control Board: Monitors safety devices, controls ignition sequence, provides diagnostic flash codes via LED. Blower Speed Taps: Multiple speed selections for heating operation. Gas Valve: Manual shutoff, pressure regulator, automatic operation. Limit Controls: High temperature safety shutoff. Pressure Switches: Verify proper venting operation.

Venting and Combustion Air

Category I vent system required. Follow local codes and manufacturer guidelines.

1. Vent Pipe: Use approved Type B double-wall vent pipe.
2. Vent Termination: Minimum 12 inches from openings, above snow line.
3. Combustion Air: Provide adequate fresh air per installation requirements.
4. Clearances: Maintain specified clearances to combustible materials.

Tip: Vent system must slope upward toward termination at 1/4 inch per foot minimum.

Operating Instructions

Normal operation controlled by thermostat.

1. Set thermostat to desired temperature above room temperature.
2. Furnace will initiate heating cycle: blower starts, ignition sequence begins.
3. Hot surface igniter glows, gas valve opens, burner ignites.
4. Flame sensor verifies ignition, main blower starts after heat exchanger warms.
5. When thermostat satisfied, gas valve closes, blower continues during post-purge.
6. For continuous fan operation, set thermostat to FAN ON position.

WARNING! If you smell gas, turn off gas supply immediately and call professional.

Maintenance Procedures

Annual maintenance by qualified technician recommended.

1. Filter: Replace or clean monthly during heating season.
2. Burners: Inspect and clean annually.
3. Heat Exchanger: Visually inspect for cracks or damage.
4. Blower: Clean wheel and motor annually.
5. Vent System: Inspect for obstructions or deterioration.
6. Safety Controls: Test operation of all safety devices.
7. Gas Connections: Check for leaks with bubble solution.

CAUTION! Turn off power and gas supply before performing any maintenance.

Safety Information

Carbon monoxide detectors required in all living areas. Never block vents or returns.

Emergency Shutdown: Turn off gas valve and disconnect power if furnace malfunctions.

Regulatory Information

ANSI Z21.47/CSA 2.3: Certified for safety standards. UL listed. Meets U.S. Department of Energy efficiency standards. Manufactured by Trane Residential Division. For technical support, contact Trane at 1-800-554-6413 or visit www.trane.com.

Troubleshooting

Diagnostic Codes: Refer to control board LED flash pattern for specific error codes.

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