This unit features a manual hi-lo adjustment range of 1

thermostat harnesses

the SEC99AA-24 armored capillary (identical to SEC99AA-24C) is a reliable solution for connecting pressure-actuated controls

The kit integrates a high-performance SEN00491 flame sensor and a 120V White-Rodgers 50A55-486 ignition control board

and York systems

McDonnell & Miller 63 Low Water Cut Off Freon This unit features a manualThe McDonnell & Miller 63 Low Water Cut Off (Part Number 142400) is a heavy duty, float operated safety control designed for residential, commercial, and industrial boiler applications. This mechanical LWCO is specifically engineered for use with both hot water and steam boilers, providing a critical layer of protection against dry fire conditions. Featuring a 1" NPT threaded connection for equalizing pipes, it is rated for a maximum boiler pressure