Fenwal 35-705600-005 Control R-410A How do I configure the

How do I configure the A421 for cooling vs

breaking the rectification circuit

reducing field downtime during critical maintenance

not for steam boilers

Fenwal 35-705600-005 Control R-410A How do I configure theThe Fenwal 35 705600 005 is a professional grade 120 VAC Direct Spark Ignition (DSI) control designed for precise burner management in gas fired equipment. This microprocessor based module replaces older analog systems, offering significantly improved timing accuracy and robust flame sensing capabilities. Engineered with a 10 second Trial for Ignition (TFI) and an integrated 120V gas valve relay, it ensures reliable startup and consistent flame