White-Rodgers 21V51U-843 HSI Kit 30067439-890 Integrated Safety: Includes a factory-installed

Integrated Safety: Includes a factory-installed fuse plug to protect the vessel against extreme thermal over-pressurization

25" WC to prevent ignition if the venting system or inducer motor is underperforming

Where should the external equalizer line be installed

It is designed for single rod flame sensing or remote sensing and provides a high-voltage spark for reliable burner ignition

Can I use this motor to replace a 115V blower

White-Rodgers 21V51U-843 HSI Kit 30067439-890 Integrated Safety: Includes a factory-installedThe White Rodgers 21V51U 843 is a professional grade Universal 2 Stage Integrated Furnace Control Kit designed for high efficiency systems utilizing a variable speed ECM blower motor. This comprehensive HSI ignition control solution replaces over 40 existing White Rodgers models, including the 50V51 XXX and 50V61 XXX series. It features a 16 pin interface for precise ECM motor control and includes a 120V nitride ignitor to upgrade older 80V silicon