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though it is vital to verify specific manifold requirements
It functions by creating negative pressure within the heat exchanger
protecting integrated control boards
5" and 4" W
York S1-029-20423-030 Orifice 321702-401 though it is vital toThe York S1 029 20423 030 Natural Gas Burner Orifice is a precision machined OEM York replacement part designed for specific BTU output requirements in commercial and residential furnaces. Featuring a #30 drill size with a 0. 1285 inch diameter, this orifice is critical for maintaining the correct manifold pressure and stoichiometric air fuel ratio. Field technicians should verify this component against the furnace rating plate to ensure proper
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