York S1-1NP0680 Conversion Kit

The York S1-1NP0680 Natural to LP Conversion Kit is a specialized OEM component set designed for field-converting residential HVAC furnaces from natural gas to liquid propane. Engineered specifically for systems utilizing modulating gas valves, such as the White-Rodgers 36E27 and 36J27 series, this kit ensures precise fuel delivery transitions without compromising manifold pressure stability. As a Source 1 technical replacement, it includes the necessary high-altitude compatible #55 burner orifices, a new regulator spring, and a gas line pressure switch to maintain safety circuit integrity. This York LP gas conversion is critical for technicians working on 90% AFUE condensing furnaces and 80% low-NOx models. The hardware allows for specific manifold pressure adjustments—typically 10.0" W.C. for high fire—ensuring the burner assembly operates within manufacturer specifications. Proper installation using this HVAC gas orifice kit prevents soot accumulation and ensures efficient combustion profiles in demanding propane applications.

• OEM Precision: Guaranteed compatibility with York, Luxaire, and Coleman modulating furnaces, eliminating the guesswork of universal kit fitment.
• Complete Hardware Set: Includes #55 LP orifices, gas valve springs, and pressure switches required for a code-compliant conversion.
• Optimized Combustion: Maintains the correct fuel-to-air ratio for propane gas, protecting the heat exchanger from premature stress.
• Regulatory Compliance: Includes all necessary conversion rating plates and safety labels required by local inspectors and the National Fuel Gas Code.

Which gas valves is the S1-1NP0680 compatible with?
This kit is specifically designed for York furnaces equipped with White-Rodgers modulating gas valves, including the 36E and 36J series produced after 2009.

What is the recommended manifold pressure after installing this kit?
For most York 90% modulating units, the propane manifold pressure should be adjusted to 10.0" W.C. for high fire and 3.5" W.C. for low fire, though you must always verify against the specific unit's rating plate.

Does this kit include orifices for high-altitude installations?
The provided #55 orifices are standard for altitudes up to 2,000 feet. For installations above 2,000 feet, additional derating may be required via different orifice sizing as per the manufacturer's altitude charts.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.