Belimo AH-25 Crankarm 321702-401 specifically contoured to match the

specifically contoured to match the combustion air inducer port

Optimized System Efficiency: Facilitates clean pump-down cycles

If it detects a drop in air volume or a blocked flue condition

You should verify your specific unit's parts list or measure the shaft diameter to ensure a precise match before installation

reducing amperage draw and heat generation compared to lower voltage units

Belimo AH-25 Crankarm 321702-401 specifically contoured to match theThe Belimo AH 25 Crankarm is a heavy duty damper actuator accessory engineered specifically for one sided standard shaft clamps. This galvanized steel actuator arm is a critical component for field mounting non spring return actuators, providing a reliable mechanical linkage for ventilation and air conditioning systems. Designed for professional HVACR contractors, the AH 25 features a precise 8. 2 mm slot width and is fully compatible with the Belimo