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Integrated HOA Switch: Features a manual Override Switch (Hand-Off-Auto) for immediate circuit control during commissioning or troubleshooting
Key Benefits: Direct OEM Match: Effectively replaces Reznor 217032 and 175273 without modification to the venter housing
Reliable Heat Transfer: Open-coil design allows for maximum airflow contact and rapid thermal response during a defrost cycle or heating demand
Reliable Flame Supervision: Employs high-gain circuitry for accurate flame rectification
Enhanced Signal Reliability: High-tolerance flame rectification circuitry ensures consistent burner flame sensing even in demanding environments
Zonefirst ZDB-16X24 16HX24W Parallel 24V 2-Pos S/R Refrigerant Integrated HOA Switch: Features aThe Zonefirst ZDB 16X24 is a professional grade 16 inch high by 24 inch wide rectangular zone damper engineered for high performance HVAC airflow management. Operating on a 24V motor, this 2 position spring return unit provides a reliable fail safe, ensuring the damper returns to its normal state during power loss. The parallel blade damper configuration allows for rapid response times and consistent modulation, making it an essential component for