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Direct Supercession: Correct factory replacement for the legacy part number 20215702S
Genuine OEM replacement part ensures exact thermistor resistance-to-temperature calibration
designed to interrupt the burner circuit if internal plenum temperatures exceed safe operating parameters
This specific York rollout switch is a manual reset model
Functional Devices TR50VA004 Transformer Direct Supercession: Correct factory replacementThe Functional Devices TR50VA004 Transformer is a heavy duty 50VA power transformer engineered for multi tap versatility in commercial and industrial HVAC control circuits. This unit features a versatile primary voltage configuration, supporting 480 277 240 120Vac, with a standard 24Vac secondary output. Built for field flexibility, it utilizes a foot and dual threaded hub mount, allowing for secure installation in electrical knockouts or flat surface
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