Reznor 110859 Pilot Assembly

As a veteran tech, you know that a reliable ignition starts with a clean, steady pilot. The Reznor 110859 Natural Gas Pilot Assembly is a direct-fit solution for standing pilot systems found in XL, XLB, CXL, and CXLB 125-400 unit heaters. This kit is also compatible with a wide range of duct furnaces, including X, XA, XB, XC, XD, XE, XG, XJ, PAK, DFAH, CX, CXE, and CPAK series units manufactured after September 1973. It provides the necessary millivolt output to keep your gas valve energized, ensuring the burner stays lit during high-demand heating cycles. Designed for 125,000 to 400,000 BTU equipment, this assembly is engineered to handle industrial environments where downtime isn't an option. Each kit includes the essential components to restore proper ignition, featuring a 24-inch TC2 thermocouple, 22-inch and 26-inch pilot tubing for X-series versatility, and the required natural gas orifice with a breakaway ferrule nut for a leak-free seal.

Key Benefits:

• Compatible with high-capacity Reznor 125-400 unit heaters and duct furnaces.
• Includes a 24-inch TC2 thermocouple for stable millivolt signals to the gas valve.
• Features multiple pilot tubing lengths (22" and 26") to ensure fitment across different cabinet sizes.
• Comes with a natural gas orifice specifically calibrated for standing pilot applications.
• Rugged construction designed for HVACR contractors and commercial facility maintenance.

Common Questions:

Will this work with electronic ignition or spark systems?
No, the 110859 is exclusively for standing pilot (match-lit) configurations. If you have a spark ignition system, you will need a different assembly designed for intermittent pilot modules.

What is the cause if the pilot flame is yellow or weak?
A yellow flame often indicates a dirty pilot orifice or inadequate primary air. Blow out the line and clear the orifice of any carbon buildup to restore the crisp blue flame needed to heat the thermocouple tip properly.

Can this be converted for use with Propane (LP)?
While the assembly comes with a natural gas orifice, it is critical to use the manufacturer-specified LP kit (typically 110860) to ensure the correct BTU input and safe operation on propane systems.

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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.