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Enhanced Safety: Standard SPST N/O configuration prevents ignition during insufficient venting conditions
making it suitable for large-scale boiler equipment
ensure the flue pipe is clear of debris and the inducer motor is reaching full RPM before replacing the switch
leak-proof fit for 1-5/8" OD tubing
For direct fired applications
Functional Devices TR20VA004 Transformer 318172-701 Enhanced Safety: Standard SPST N/OThe Functional Devices TR20VA004 is a versatile 20VA control transformer designed for reliable power conversion in building automation and HVAC systems. Built with split bobbin construction, this unit effectively steps down high line voltage to a consistent 24Vac secondary voltage for powering thermostats, relays, and sensors. The multi tap primary accommodates 120 208 240 277Vac, providing technicians with a single part solution for diverse project
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