Zonefirst AOBD-20X8 Damper Freon Ensure the sensing port on

Ensure the sensing port on the collector box is clear of debris

Using an incorrect pitch can overload the fan motor or cause insufficient cooling

" checking the S1-029-20422-056 orifice for debris or obstruction is standard protocol to ensure efficient combustion and system safety

this retainer supports the necessary tension for accurate pneumatic valve actuator positioning

utilizing genuine Spence replacement parts is essential to maintain the calibration accuracy of the D-Pilot

Zonefirst AOBD-20X8 Damper Freon Ensure the sensing port onThe Zonefirst AOBD 20X8 is a high performance automatic opposed blade damper designed for precision airflow management in commercial and residential HVAC zoning. This 20" x 8" unit features a robust 24Vac power open power closed actuator, requiring a 3 wire connection for positive drive control in both directions. Unlike standard gravity or spring return models, the AOBD 20X8 side mount damper utilizes a synchronous motor that draws power only during