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

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

Simplified Installation: Features a standard 2-bolt flange design

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

this suction service valve is designed to handle the pressures associated with R-410A refrigerant

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