Copeland Comfort Control (White Rodgers) 50N02B-820 Ignition Control

The Copeland Comfort Control (White Rodgers) 50N02B-820 Ignition Control is the professional-grade Trane OEM replacement engineered for high-demand commercial packaged units. As a direct CNT5135 replacement, this integrated furnace control module supports both single and two-stage applications, ensuring precise sequence management for heating cycles. This board utilizes direct spark ignition (DSI) technology and includes a factory-set 45-second cool fan off delay, which is critical for maximizing heat exchanger longevity and maintaining consistent airflow. Designed for rugged field environments, the module operates reliably between -40°F and 175°F. Technicians can rely on the onboard green diagnostic LED for immediate fault code identification, significantly reducing troubleshooting time during service calls. With an input voltage of 24 VAC and specialized relays for the inducer and circulator (PSC) motors, the 50N02B-820 provides a seamless drop-in solution for maintaining Trane commercial HVAC systems without the need for complex mounting modifications.

Key Benefits for HVAC Contractors

• Direct OEM Compatibility: Specifically designed to replace Trane CNT5135 and 50N02B-820 models, ensuring correct terminal alignment and mounting standoff positioning.
• Advanced Troubleshooting: Features a high-visibility diagnostic LED that simplifies the identification of flame failure or pressure switch issues.
• Superior Spark Energy: Delivers 13mJ @ 24 VAC for consistent ignition, even in high-humidity environments up to 95% RH.
• Optimized Timings: Set with a 0.8-second flame establishing time and a 2.0-second flame failure response time to ensure safe and efficient furnace operation.
• Versatile Application: Supports both standard and staged heating configurations, making it a versatile truck-stock item for commercial service.

Frequently Asked Questions

What Trane part numbers does the 50N02B-820 replace?
This is the direct replacement for Trane CNT5135 and is used extensively in commercial packaged units and furnace sections.

Can this module be used in 50 Hz power applications?
Yes, the 50N02B-820 is compatible with 50 Hz systems, though all timing specifications (such as fan delays and flame response) must be increased by 20% to account for the cycle difference.

What does a green diagnostic LED on the board indicate?
The LED provides real-time system status. A steady signal or specific flash pattern allows the technician to diagnose faults like "No Flame Detected" or "Limit Switch Open" without pulling the multi-meter for every check.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.