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The Johnson Controls S351AA-1 is a professional-grade humidity stage module designed to integrate seamlessly with the System 350
Key Benefits Precise Fuel Conversion: Specifically designed for Reznor FT/SFT unit heaters to ensure seamless transition to natural gas
This comprehensive service kit is specifically designed for Normally Closed (NC) configurations
Using a switch with a higher opening temperature than 240°F can lead to heat exchanger overheating
Common Questions: Does the S8F require a minimum pressure drop to open
Fenwal 35-705505-017 Control R-410A The Johnson Controls S351AA-1 isThe Fenwal 35 705505 017 is a microprocessor based 120V Direct Spark Ignition (DSI) control engineered for precision in gas fired appliances. This ignition control module features a 15 second trial for ignition (TFI) and is factory configured for a 3 try ignition sequence, ensuring reliable burner light off even in demanding environments. Designed to manage gas valves and monitor flame rectification, it provides 120 VAC DSI control for systems up to