The Sterling 261R04867 Natural to LP Conversion Kit is a critical OEM component designed for field-converting Sterling tubular unit heaters and Beacon Morris systems from natural gas to liquid propane. This kit is specifically calibrated for 100,000 to 400,000 BTU/HR units equipped with hot surface ignition and Honeywell SmartValves (SV95 and SV96 series). As a genuine Sterling HVAC part, it ensures precise manifold pressure regulation and proper orifice sizing to maintain combustion efficiency and safety under propane firing rates. Engineered for high-demand commercial and industrial environments, the 261R04867 gas conversion kit handles the higher energy density of LP gas by providing the necessary main burner orifices, a specific Honeywell gas valve conversion spring, and the required pilot burner orifice. This kit is a direct fit for Sterling TF series heaters (including TF100 through TF400 models) manufactured before 2005. Proper installation involves replacing the silver NG spring with the white LP spring and verifying 10.0" W.C. manifold pressure to ensure stable flame characteristics and prevent carbon monoxide production. Key Benefits Ensures accurate fuel-to-air ratios for Sterling TF100-TF400 unit heaters using Honeywell SV95/SV96 valves. Includes the full Honeywell gas valve conversion kit and all necessary main burner orifices for high-BTU loads. Facilitates seamless NG to LP conversion without the need for additional aftermarket pilot modifications. Features essential conversion labels and specialized LP orifices to meet local jurisdictional safety codes. Designed exclusively for hot surface ignition systems to prevent delayed ignition or lockout issues. Common Questions Can I use this kit with the newer White Rodgers direct spark ignition valves? No, this kit is specifically designed for Honeywell SmartValve models (SV95/SV96) typically found on units manufactured before 2005. Direct spark systems require different orifice configurations and valve kits. Are the orifices sized for high-altitude applications? The provided orifices are standard for 0-2,000 feet. If you are installing at elevations above 2,000 feet, the burner gas input must be de-rated by 4% per 1,000 feet, which may require different orifice sizes. What manifold pressure should I set after installing the 261R04867 kit? For standard propane operation, the Honeywell gas valve should be adjusted to 10.0" W.C. while the unit is firing at full capacity to ensure proper burner performance. Non Cancelable / Non Returnable 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.
