this is a universal HVAC relay for any 120V application requiring similar amperage and terminal configurations

ensuring consistent manifold pressure for efficient combustion cycles

and ignition modules in residential and commercial systems

Heavy-Duty Construction: Built with industrial-grade materials to withstand the high-temperature environment of a combustion chamber

McDonnell & Miller 94-7B-HD Controller 318423-701 this is a universal HVACThe McDonnell & Miller 94 7B HD is a high performance head mechanism only designed for heavy duty commercial and industrial steam applications. As a critical replacement head mechanism for Series 94 and 194 controllers, this unit integrates a combination low water cut off and pump controller to maintain precise boiler water level control. Engineered for systems with a maximum pressure of 250 PSI, it utilizes a 7B potentiometer switch to provide a 135