The McDonnell & Miller 342200 (Model SA51-9) is an OEM strainer assembly and gasket designed for integration with specific boiler water level controls and feeders

Common symptoms include a blower fan that won't turn off

5 screwed entry

Short Cycle Protection: Built-in 5-minute delay prevents rapid compressor cycling

ensuring reliable setpoint maintenance in commercial environments

Lochinvar & A.O. Smith 100111040 Controller 322838-753 The McDonnell & Miller 342200As a seasoned technician, you know that a failing control module on a high recovery commercial unit means a complete system shutdown. The Lochinvar & A. O. Smith 100111040 Controller is the precise OEM replacement part engineered for the BTH 199 100 and BTH 199A Cyclone Xi series. This combined controller serves as the central intelligence for your commercial gas water heater, managing critical ignition sequences, flame sensing, and temperature