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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
and CT gas boilers across all BTU sizes
Whether you are performing a mid-season repair or a full system overhaul
Steam Rated Durability: Specifically designed as a steam zone valve
The BX suffix simply denotes that the part is individually boxed by the manufacturer
resisting environmental degradation to preserve historical records for compliance and analysis
Johnson Controls A421ABC-02 Temperature Control Els PW 17895 and CT gas boilers acrossThe Johnson Controls A421ABC 02 is a professional grade electronic temperature control engineered for high accuracy performance in demanding HVACR environments. Operating on a versatile 120 240 VAC power supply, this single stage SPDT control provides a wide regulation range from 40F to 212F. It serves as the primary digital thermostat upgrade and direct cross replacement for legacy models including the A419ABC 1, A320ABC 1, and A319ABC series. The
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