Trane CNT6015 Integrated Furnace Control Board User Manual

1. Introduction

This manual provides essential information for the safe and effective installation, operation, and maintenance of the Trane CNT6015 Integrated Furnace Control Board. This board is a critical component for managing the functions of a two-stage furnace system.

Important Safety Information

WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read these instructions thoroughly before installing or servicing this equipment.

• Always disconnect power to the furnace before performing any service or installation.
• Installation and service must be performed by a qualified installer or service agency.
• Follow all local codes and ordinances.
• Wear appropriate personal protective equipment (PPE) such as safety glasses and gloves.
• Verify all wiring connections are secure and correct before restoring power.

2. Product Overview

Product Description

The Trane CNT6015 is an OEM (Original Equipment Manufacturer) 2-Stage Integrated Furnace Control (IFC) Board. It is designed to manage the operational sequences of a two-stage furnace, ensuring efficient and reliable heating performance. This control board integrates various functions, including ignition, flame sensing, blower control, and safety monitoring.

Image 2.1: The Trane CNT6015 Integrated Furnace Control Board. This image shows the green circuit board with various electronic components, relays, and connectors.

Key Features

• OEM 2-Stage IFC Control Board
• Service First Component
• Manages ignition, flame sensing, and blower operations
• Ensures safety and efficiency of furnace operation

Image 2.2: An official stamp indicating "TRANE OEM COMPONENT," signifying the authenticity and quality of the part.

3. Compatibility

The Trane CNT6015 Integrated Furnace Control Board replaces and supersedes several previous models and is compatible with a range of Trane and American Standard furnace units.

Replaces / Supersedes

• CNT6015
• CNT-6015
• CNT06015
• 50V5150702
• D156245P01
• 786710548260
• And others

Commonly Found in These Units

This control board is commonly found in the following Trane and American Standard furnace models:

• ADD2B060A9V3VAA, ADD2B060A9V3VAB, ADD2B080A9V3VAA, ADD2B080A9V3VAB, ADD2C100A9V5VAA, ADD2C100A9V5VAB, ADD2D120A9V5VAA, ADD2D120A9V5VAB
• AUD2B060A9V3VBA, AUD2B060A9V3VBB, AUD2B060G9V3VAA, AUD2B080A9V3VBA, AUD2B080A9V3VBB, AUD2B080A9V3VBC, AUD2B080G9V3VAA, AUD2B100A9V3VBA, AUD2B100A9V3VBB, AUD2B100G9V3VAA, AUD2C080A9V4VBA, AUD2C080A9V4VBB, AUD2C080B9V4VBA, AUD2C080B9V4VBB, AUD2C080G9V4VAA, AUD2C080H9V4VAA, AUD2C100A9V5VBA, AUD2C100A9V5VBB, AUD2C100B9V5VBA, AUD2C100B9V5VBB, AUD2C100G9V5VAA, AUD2C100H9V5VAA, AUD2D120A9V5VBA, AUD2D120A9V5VBB, AUD2D120B9V5VBA, AUD2D120B9V5VBB, AUD2D120G9V5VAA, AUD2D120H9V5VAA, AUD2D140A9V5VBA, AUD2D140A9V5VBB, AUD2D140G9V5VAA
• TDD2B060A9V3VAA, TDD2B060A9V3VAB, TDD2B080A9V3VAA, TDD2B080A9V3VAB, TDD2C100A9V5VAA, TDD2C100A9V5VAB, TDD2D120A9V5VAA, TDD2D120A9V5VAB
• TUD2B060A9V3VBA, TUD2B060A9V3VBB, TUD2B060G9V3VAA, TUD2B080A9V3VBA, TUD2B080A9V3VBB, TUD2B080A9V3VBC, TUD2B080G9V3VAA, TUD2B100A9V3VBA, TUD2B100A9V3VBB, TUD2B100G9V3VAA, TUD2C080A9V4VBA, TUD2C080A9V4VBB, TUD2C080B9V4VBA, TUD2C080B9V4VBB, TUD2C100A9V5VBB, TUD2C100B9V5VBA, TUD2C100B9V5VBB, TUD2C100G9V5VAA, TUD2C100H9V5VAA, TUD2D120A9V5VBA, TUD2D120A9V5VBB, TUD2D120B9V5VBA, TUD2D120B9V5VBB, TUD2D120G9V5VAA, TUD2D120H9V5VAA, TUD2D140A9V5VBA, TUD2D140A9V5VBB, TUD2D140G9V5VAA

4. Installation (Setup)

IMPORTANT: Installation of this control board should only be performed by a qualified HVAC technician. Incorrect installation can lead to equipment damage, fire, electrical shock, or personal injury.

Pre-Installation Checklist

• Ensure the replacement board is the correct model (CNT6015 or equivalent).
• Turn off all electrical power to the furnace at the main service panel.
• Verify power is off using a voltage meter.
• Have appropriate tools ready (screwdrivers, wire strippers, multimeter).
• Take photos of existing wiring connections for reference.

Removal of Old Control Board

1. Locate the existing control board within the furnace.
2. Carefully disconnect all wiring harnesses and individual wires from the old board. Label wires if necessary to ensure correct re-connection.
3. Unscrew or unclip the old board from its mounting points.
4. Remove the old board from the furnace.

Installing the New Control Board

1. Mount the new Trane CNT6015 control board in the same location as the old board, securing it with screws or clips.
2. Refer to your photos and the furnace wiring diagram to reconnect all wiring harnesses and individual wires to the corresponding terminals on the new board. Ensure all connections are firm and correct.
3. Double-check all wiring for proper connection and routing.
4. Once all connections are verified, restore electrical power to the furnace.
5. Observe the furnace operation to ensure it functions correctly through all stages (e.g., ignition, fan operation, heating cycles).

Image 4.1: This image illustrates the front and back views of the Trane CNT6015 control board, including its approximate dimensions (5¼" width, 8⅛" height). This can be useful for verifying fitment.

5. Operation

The Trane CNT6015 Integrated Furnace Control Board operates automatically once installed and powered. It receives signals from the thermostat and other furnace sensors to initiate and control the heating sequence, including:

• Ignition Sequence: Manages the gas valve and igniter to start the burner.
• Flame Sensing: Monitors the presence of a flame to ensure safe operation.
• Blower Control: Activates and deactivates the furnace blower fan based on heating demand and temperature.
• Two-Stage Heating: Controls the furnace's ability to operate at two different heat output levels for improved efficiency and comfort.
• Safety Lockouts: Implements safety protocols to shut down the furnace in case of malfunctions or unsafe conditions.

For detailed operational parameters and settings, refer to the specific furnace unit's user manual, as the control board's behavior is integrated with the overall furnace system.

6. Maintenance

The Trane CNT6015 Integrated Furnace Control Board itself typically requires no routine maintenance. However, regular maintenance of the overall furnace system is crucial for its longevity and proper functioning. This includes:

• Annual Professional Inspection: Have a qualified HVAC technician inspect your furnace annually.
• Air Filter Replacement: Regularly check and replace the furnace air filter as recommended by the furnace manufacturer.
• Cleanliness: Keep the area around the furnace clean and free of obstructions.
• Ventilation: Ensure proper ventilation for the furnace.

If the control board appears dirty or dusty, ensure power is disconnected and gently clean it with a soft, dry brush or compressed air. Avoid using liquids or harsh chemicals.

7. Troubleshooting Guide

This section provides general troubleshooting tips. For specific error codes or complex issues, consult a qualified HVAC technician or the furnace's service manual.

• Furnace Not Starting:
  • Check if the thermostat is set to "Heat" and the temperature is above the ambient room temperature.
  • Ensure the furnace power switch is "ON".
  • Verify the circuit breaker for the furnace has not tripped.
  • Check if the furnace filter is clean and not restricting airflow.
• No Heat / Insufficient Heat:
  • Confirm the gas supply valve is open.
  • Listen for the igniter and burner ignition sequence. If no ignition, there might be an issue with the igniter, flame sensor, or gas valve.
  • Check for any diagnostic fault codes displayed on the control board (if applicable). Refer to your furnace manual for code interpretations.
• Blower Not Operating:
  • Ensure the thermostat fan setting is not set to "OFF" or "AUTO" when continuous fan is desired.
  • If the blower does not come on during a heating cycle, it could indicate a problem with the blower motor, capacitor, or the control board's blower relay.

If these basic steps do not resolve the issue, it is recommended to contact a certified HVAC technician for diagnosis and repair.

8. Technical Specifications

9. Warranty and Technical Support

For warranty information regarding the Trane CNT6015 Integrated Furnace Control Board, please refer to the documentation provided with your original furnace unit or contact Trane directly. Warranty terms typically vary based on the product and region.

For technical support, it is recommended to contact a qualified HVAC professional or an authorized Trane service provider. They have the expertise and specialized tools to diagnose and resolve issues related to furnace control boards and overall HVAC systems.

Note: This manual is for informational purposes only and does not supersede the official documentation provided by Trane or the specific furnace manufacturer.