but physical specifications and performance remain the same

provided the appropriate thermal element and cartridge are installed

The physical dial on the board allows you to adjust the ventilation schedule between 1 and 60 minutes per hour to meet the required airflow rate measured at the intake duct

Universal Compatibility: Serves as the primary replacement for MA-6501 and MA-7501 series

Whether you are performing a motor swap or a full system overhaul

Lochinvar & A.O. Smith 100093859 Assembly R-410A but physical specifications and performanceThe Lochinvar & A. O. Smith 100093859 Manifold Door Assembly is a high precision OEM replacement engineered for high efficiency gas fired boilers and residential FVIR water heaters. As a veteran grade burner door assembly, this kit is essential for maintaining the sealed combustion chamber's integrity, ensuring optimal thermal efficiency and safe manifold pressure regulation. The assembly integrates a robust door port designed to withstand high