This is a safety feature used to distinguish high-voltage primary lines from 24V secondary lines

Precise Modulating Control: 0-10 VDC input for accurate damper and valve positioning

For outdoor or wash-down applications

Easy Installation: Equipped with a universal mounting design and raised

Direct OEM Fit: Standard 1/2" NPT mounting thread allows for fast

York S1-373-11099-700 Gas Valve R-410A This is a safety featureThe York S1 373 11099 700 is an OEM intermittent pilot gas valve designed for high performance natural gas heating applications. This HVAC gas control valve operates on a standard 24VAC furnace valve circuit (60 Hz, 0. 5A) and is engineered for precise fuel regulation in residential and commercial units. Featuring a dual automatic operator configuration, the valve includes an integrated pilot tube to ensure consistent flame ignition across various