Lochinvar KBN700 Smartest Choice for Condensing Boiler Performance, Knight XL Combustion System

The Smartest Choice for Condensing Boiler Performance

The KNIGHT®® XL, engineeredd withh Lochinvar’s exclusive SMART SYSTEM™ control and an array of other innovative features, places it far ahead of any commercial heating boiler in its class. It promises and delivers ultimate ease of installation and maintenance. With up to 94.6% thermal efficiency, low-NOx emissions and a fully modulating burner, it is the best ”green choice” for today’s environmentally focused market.

Five modulating/condensing stainless steel KNIGHT XL boilers are available, with 399,000–800,000 Btu/hr inputs, with remarkably small space-saving footprints. All are equipped for direct-vent installation with air intake and exhaust runs up to 100 feet using PVC, CPVC or AL29-4C venting materials. This range of choices is ideal for light-duty applications such as small hotels, schools and office buildings. For higher-demand applications, up to eight KNIGHT XL units can be installed utilizing the built-in cascading sequencer to deliver up to 6.4 million Btu/hr heating capacity.

THE KNIGHT XL BOILER reflects Lochinvar’s constant commitment to providing all the options you need to serve every application.

The Knight XL Combustion System

Advanced Negative Regulation Technology

KNIGHT XL safely and reliably operates with supply gas pressure as low as 4 inches water column, as Negative Regulation (Neg/Reg) technology automatically adjusts fan speed that ensures the correct volume and mix of fuel and air throughout the firing range.

”Fail-Safe” Direct-Spark Ignition

With each call for heat, two electrodes ignite the fuel/gas mixture. A third electrode then senses for flame. SMART SYSTEM will lock out and display the fault if ignition does not occur.

Two-in-One Stainless Steel Heat Exchanger

A combined primary and secondary heat exchanger captures flue gas heat and allows entering water temperatures as low as 50°F. The stainless steel, pH-tolerant design features a weld-sealed assembly with no O-rings or gaskets, and does not require special glycol. ASME Section IV approved and stamped.

Fully Modulating Burner

The SMART SYSTEM allows fully modulating combustion with 5:1 turndown. The burner can fire as low as 20% of maximum input, and modulates the firing rate up to 100% as demand increases. The burner is a single stainless steel assembly covered with woven steel mesh, and fires in a 360° pattern along the entire length of the primary heat exchanger. This allows the compact KNIGHT XL to exceed the capacity of units with larger multiple burners.