Direct OEM Cross-Reference: Serves as the primary F77-5413 replacement and fits most major brand electric furnaces using a two-switch configuration

Universal Compatibility: Serves as a reliable replacement for Robertshaw R77-22 and Carrier HK08ZZ041 components in legacy pneumatic systems

installing a genuine Field Controls replacement part is essential to maintain the 100% negative pressure required for safe combustion gas exhaustion

it is professional best practice to mount them in a vertical position to ensure the most accurate setpoint calibration and drainage of any potential condensate

Direct the torch flame away from the center of the sight glass to prevent condensation from washing away the indicator salt

Tjernlund Products DJ3 Draft Inducer 340793-762 Direct OEM Cross-Reference: Serves asThe Tjernlund DJ3 Draft Inducer is a critical technical solution for technicians addressing drafting issues in gas and oil fired equipment. This 115V, 1550 RPM in line draft inducer is engineered to overcome negative pressures caused by undersized chimneys, long horizontal vent runs, or restrictive heat exchangers. Utilizing a specialized venturi action, the TJERNLUND PRODUCTS DJ3 initiates immediate airflow up the stack, ensuring a consistent and