Fenwal 35-705500-501 Control 30067439-890 audible air hissing at the

audible air hissing at the control head

delivering the consistent climate control required in commercial and industrial make-up air applications

Key Benefits for Technicians: Universal Compatibility: Integrated check valve allows for seamless operation in both AC and heat pumps without external bypass piping

this mechanical bypass damper requires no electrical wiring

2-10V) or sequenced with other actuators

Fenwal 35-705500-501 Control 30067439-890 audible air hissing at theThe Fenwal 35 705500 501 is a microprocessor based Direct Spark Ignition (DSI) control engineered for 120V gas fired systems. This 120V ignition module provides a fixed 5 second pre purge to clear the combustion chamber and a 4 second trial for ignition (TFI) to ensure safe burner startup. Designed for compatibility with both natural gas and LP applications, this replacement furnace control board utilizes Detect A Flame technology for precise flame