ZoneFirst RDP-12 Round Damper 321894-708 but ensure those connected to

but ensure those connected to M1-M2 are the primary fan/heat terminals to maintain the 1-20 second staging delay

This part number typically covers the heat exchanger cells and vest plate

While the valve body can be oriented as needed

this standing pilot assembly ensures a stable flame pattern for consistent main burner ignition

Its low-pressure-drop design integrates dual access valves for precise monitoring of pressure across the core

ZoneFirst RDP-12 Round Damper 321894-708 but ensure those connected toThe ZoneFirst RDP 12 is a professional grade 12 inch round damper engineered for precision airflow management in residential and light commercial HVAC zoning systems. This unit features the high torque MP12M modular motor, which utilizes a 12Vdc drive to provide reliable power open power closed operation. Constructed from heavy duty galvanized steel, the RDP 12 ensures structural integrity under high static pressure while the elliptical blade design