Lennox 18L11 Conversion Kit

The Lennox 18L11 LP Conversion Kit (617168-01) is the essential field-service solution for transitioning Lennox compact unit heaters from natural gas to liquid propane. This OEM Lennox conversion kit is engineered specifically for LF25, LS25, and UHRS series units ranging from 30k to 105k BTUs. As a direct replacement for Lennox 45L85 and 617168-01, it ensures precise manifold pressure regulation when paired with White Rodgers 36G series gas valves. The kit includes seven 1.15 size burner orifices, a dedicated pressure switch with wire harness, and the necessary brass fittings and nipples to maintain combustion efficiency and safety standards. Whether you are performing a new installation or a site retrofitting for propane or high-altitude applications, this kit providing the exact technical specifications required for a code-compliant fuel conversion.

Key Benefits for Technicians:

• Universal Series Compatibility: Fits LF25-30 through LF25-105 and LS25-30 through LS25-105 unit heaters.
• Precise Gas Regulation: Includes a White Rodgers 36G series conversion kit and pressure measuring adapter for accurate manifold adjustments.
• Complete Hardware Package: Features seven precision-drilled orifices, brass adapters, and the critical pressure switch required for LP transition.
• Standardized Replacement: Serves as the factory-authorized alternative to obsolete part numbers 45L85 and 617168-01.

Common Installation Questions:

Which gas valves are compatible with this kit?
This 18L11 kit is designed specifically for units utilizing the White Rodgers 36G gas valve. Always verify the valve series on the unit nameplate before starting the conversion.

Is this kit suitable for high-altitude propane conversions?
Yes, the Lennox 18L11 is optimized for LP/propane conversion and provides the necessary components to maintain proper burner performance in various environmental conditions.

Does this kit include orifices for all burner configurations?
The kit provides seven burner orifices (size 1.15), covering the requirements for the various BTU capacities within the LF25 and UHRS series.

This item is not eligible for free shipping.

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.