Lennox 11K51 Conversion Kit
The Lennox 11K51 (Model 604888-14) is a critical natural to LP/propane gas conversion kit engineered specifically for technical compatibility with Lennox two-stage furnaces. Designed for professional field conversion, this kit enables the EL280, SL280, EL296, EL297, and ML296 series units to operate safely on regulated liquid propane. As a genuine Lennox 11K51 conversion kit, it includes high-precision components such as 0.034-inch burner orifices and the S145 low gas inlet pressure switch to ensure proper manifold pressure and safety lockout thresholds are maintained.
For technicians adjusting fuel delivery, this kit supports two-stage gas valves including the White-Rodgers 36G, H, and J series. The provided regulator springs (77W89 and 23Y44) allow for a precise regulation range of 4.0” to 10.0” W.C. on low fire and 6.0” to 12.0” W.C. on high fire. Utilizing OEM Lennox furnace parts for gas furnace LP conversion ensures that the combustion blower and burner assembly function within factory specifications, preventing improper firing rates or soot accumulation associated with aftermarket kits.
Key Benefits for Contractors:- Full System Compatibility: Specifically valved and orificed for Lennox SL280, EL296, and ML296 two-stage platforms.
- Complete Installation Package: Includes 12 main burner orifices, manifold pressure regulator springs, and required high/low fire adjustment labels.
- Safety Integrated: Features an S145 low pressure switch and a dedicated wire harness to prevent operation under insufficient inlet pressure.
- Validated Performance: Maintains the intended BTU output of the furnace while operating on liquid propane.
Can I use this kit for single-stage Lennox furnaces?
No, the 11K51 is specifically designed for two-stage gas furnaces with White-Rodgers F92-1008 or equivalent 36G/H/J series valves. Single-stage units require a different orifice and spring configuration.
What is the correct manifold pressure after installing the 11K51 kit?
For this conversion, low fire should be set between 4.0” and 10.0” W.C., and high fire must be calibrated between 6.0” and 12.0” W.C. always verify settings against the specific furnace nameplate data.
Are these orifices suitable for high-altitude installations?
These 0.034-inch orifices are standard for LP conversion. Installations above 2,000 feet may require further derating per the furnace installation manual and local codes.
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.
Original: $341.96
-65%$341.96
$119.69Lennox 11K51 Conversion Kit
The Lennox 11K51 (Model 604888-14) is a critical natural to LP/propane gas conversion kit engineered specifically for technical compatibility with Lennox two-stage furnaces. Designed for professional field conversion, this kit enables the EL280, SL280, EL296, EL297, and ML296 series units to operate safely on regulated liquid propane. As a genuine Lennox 11K51 conversion kit, it includes high-precision components such as 0.034-inch burner orifices and the S145 low gas inlet pressure switch to ensure proper manifold pressure and safety lockout thresholds are maintained.
For technicians adjusting fuel delivery, this kit supports two-stage gas valves including the White-Rodgers 36G, H, and J series. The provided regulator springs (77W89 and 23Y44) allow for a precise regulation range of 4.0” to 10.0” W.C. on low fire and 6.0” to 12.0” W.C. on high fire. Utilizing OEM Lennox furnace parts for gas furnace LP conversion ensures that the combustion blower and burner assembly function within factory specifications, preventing improper firing rates or soot accumulation associated with aftermarket kits.
Key Benefits for Contractors:- Full System Compatibility: Specifically valved and orificed for Lennox SL280, EL296, and ML296 two-stage platforms.
- Complete Installation Package: Includes 12 main burner orifices, manifold pressure regulator springs, and required high/low fire adjustment labels.
- Safety Integrated: Features an S145 low pressure switch and a dedicated wire harness to prevent operation under insufficient inlet pressure.
- Validated Performance: Maintains the intended BTU output of the furnace while operating on liquid propane.
Can I use this kit for single-stage Lennox furnaces?
No, the 11K51 is specifically designed for two-stage gas furnaces with White-Rodgers F92-1008 or equivalent 36G/H/J series valves. Single-stage units require a different orifice and spring configuration.
What is the correct manifold pressure after installing the 11K51 kit?
For this conversion, low fire should be set between 4.0” and 10.0” W.C., and high fire must be calibrated between 6.0” and 12.0” W.C. always verify settings against the specific furnace nameplate data.
Are these orifices suitable for high-altitude installations?
These 0.034-inch orifices are standard for LP conversion. Installations above 2,000 feet may require further derating per the furnace installation manual and local codes.
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.
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Description
The Lennox 11K51 (Model 604888-14) is a critical natural to LP/propane gas conversion kit engineered specifically for technical compatibility with Lennox two-stage furnaces. Designed for professional field conversion, this kit enables the EL280, SL280, EL296, EL297, and ML296 series units to operate safely on regulated liquid propane. As a genuine Lennox 11K51 conversion kit, it includes high-precision components such as 0.034-inch burner orifices and the S145 low gas inlet pressure switch to ensure proper manifold pressure and safety lockout thresholds are maintained.
For technicians adjusting fuel delivery, this kit supports two-stage gas valves including the White-Rodgers 36G, H, and J series. The provided regulator springs (77W89 and 23Y44) allow for a precise regulation range of 4.0” to 10.0” W.C. on low fire and 6.0” to 12.0” W.C. on high fire. Utilizing OEM Lennox furnace parts for gas furnace LP conversion ensures that the combustion blower and burner assembly function within factory specifications, preventing improper firing rates or soot accumulation associated with aftermarket kits.
Key Benefits for Contractors:- Full System Compatibility: Specifically valved and orificed for Lennox SL280, EL296, and ML296 two-stage platforms.
- Complete Installation Package: Includes 12 main burner orifices, manifold pressure regulator springs, and required high/low fire adjustment labels.
- Safety Integrated: Features an S145 low pressure switch and a dedicated wire harness to prevent operation under insufficient inlet pressure.
- Validated Performance: Maintains the intended BTU output of the furnace while operating on liquid propane.
Can I use this kit for single-stage Lennox furnaces?
No, the 11K51 is specifically designed for two-stage gas furnaces with White-Rodgers F92-1008 or equivalent 36G/H/J series valves. Single-stage units require a different orifice and spring configuration.
What is the correct manifold pressure after installing the 11K51 kit?
For this conversion, low fire should be set between 4.0” and 10.0” W.C., and high fire must be calibrated between 6.0” and 12.0” W.C. always verify settings against the specific furnace nameplate data.
Are these orifices suitable for high-altitude installations?
These 0.034-inch orifices are standard for LP conversion. Installations above 2,000 feet may require further derating per the furnace installation manual and local codes.
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.
