the contacts should be open

leak-resistant connection within the refrigerant circuit

it is typically used to interrupt two legs of the power supply for motors up to 5 hp at 208/220 VAC

this unit is a close on rise fan control

and igniter failures

Belimo AFB24-S Actuator Refrigerant the contacts should be openThe Belimo AFB24 S is a heavy duty spring return damper actuator engineered for on off control in demanding HVAC applications. Delivering a robust 180 in lb torque, this unit is designed to operate reliably within 24VAC or 24VDC circuits, ensuring failsafe positioning for fire and smoke dampers or large control air valves during power loss. The integrated auxiliary switches (2x SPDT) provide precise position feedback to the building management system,