Featuring a 1/2" x 3/4" inlet/outlet configuration

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

this 4520-2048-000 limit control offers exact fitment for industrial machinery and manufacturing processes

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

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

Tjernlund Products DJ3 Draft Inducer 340793-762 Featuring a 1/2" x 3/4"The 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