leaving the board bypassed is never recommended

By using an authentic York replacement part

For ducts between 24 and 48 inches wide

Common Questions Is this board compatible with both Mark IV and older control systems

Engineered with a patented bimetal sensor

Belimo FSLF24-SFC Actuator 320734-701 leaving the board bypassed isThe Belimo FSLF24 SFC is a specialized fire and smoke damper actuator designed for use in life safety applications requiring UL 555 and UL 555S compliance. Operating on a 24V AC DC power supply, this spring return actuator delivers 30 in lb of torque, ensuring high reliability fail safe operation during power loss or fire alarm triggers. The FSLF24 SFC features a fast acting 15 second drive time and includes integrated auxiliary switches for remote