The White Rodgers 50N02B-820 is an integrated furnace control board engineered for aftermarket service and direct replacement in Trane commercial packaged units. It supports both single-stage and two-stage applications and features a selectable cool fan off delay (45 or 0 seconds), allowing tailored control of post-cooling airflow to improve comfort and system efficiency.Key Features:

• Direct Spark Ignition (DSI): Provides consistent and efficient ignition performance.
• Selectable Cool Fan Off Delay: Choose between 45 or 0 seconds to manage airflow after cooling cycles.
• Green Diagnostic LED: Helps with quick and accurate system troubleshooting.
• Versatile Mounting: Can be installed using standoffs or an adapter board.

Specifications:

• Operating Temperature: -40°F to 175°F (-40°C to 80°C)
• Humidity Range: 10% to 95% RH (non-condensing)
• Input Voltage: 24 VAC, 50/60 Hz
• Maximum Input Current @ 25 VAC: 350 mA + MV
• Gas Valve Relay: 1.5 A @ 30 VAC, 0.6 PF
• Inducer Relay: 7.5 FLA, 1.5 LRA max @ 240 VAC
• Circulator Relay(s) – PSC: 10 FLA, 30 LRA max @ 240 VAC
• Spark Rate: 50/60 Hz
• Spark Energy: 10 mJ @ 18 VAC / 13 mJ @ 24 VAC
• Flame Detection Current: Minimum 1.2 µA DC; Nominal 4.5 µA DC

Timing (at 60 Hz):

• Flame Establishing Time: 0.8 seconds
• Flame Failure Response Time: 2.0 seconds
  (Note: At 50 Hz, all timing values increase by 20%)

This control board is a direct replacement for Trane part numbers CNT05135 and CNT5135, delivering reliable, long-lasting performance.Available now at Beenimax.com – trusted HVAC parts for professionals and contractors.