Exact OEM Compatibility: Eliminates the gaps and bypass issues often found with generic "cut-to-fit" foam or mesh alternatives

Check the wiring connections at the terminal block or verify the resistance of the A99BB-25C sensor against the manufacturer

or soot buildup on the secondary heat exchanger restricting airflow

Engineered for two-stage heating systems

This unit features a CCWSE (Counterclockwise Shaft End) rotation

Trane BRD4570 Control Board 320788-702 Exact OEM Compatibility: Eliminates theThe Trane BRD4570 is a high performance Tracer VV550 VAV controller designed specifically for precision air distribution and multi zone climate management. Engineered to replace legacy Tracer VV550 units, this direct replacement VAV board ensures seamless integration with Trane building automation systems using the LonTalk communication protocol. Operating on standard 24VAC power input, the Trane BRD4570 HVAC control board manages dampt actuator