H I G H E F F I C I E N C Y CO M M E R C I A L C O N D E N S I N G B O I L E R S
OPERATING CONTROL FEATU FEATURING A BUILT-IN CASCADING SEQUENCER 5 MODELS: 399,000 – 800,000 BTU/HR FIRING RATE MODULATION TO 5:1 LESS THAN 20 ppm NOx DIRECT VENT FLEXIBILITY TO 100 FEET
L o c h i n v a r.c o m
The Smartest Sma artest Choice fo for or C Condensing ondensing Boiler Performance The KNIGHT ® XL, engineered with 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 and 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, Polypropylene or AL29-4C vent 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 se serve every application. KNIGHT XLs installed and commissioned by Black & McDonald
Advanced Negative Regulation Technology Ad KNIGHT K NIG XL safely and reliably operates with supply gas pressure as low as 4 inches water column. Negative Regulation (Neg/Reg) technology automatically adjusts fan speed that ensures the correct volume Neg and mix of fuel and air throughout the firing range.
TTwo-in-One w Stainless Steel Heat Exchanger A primary prim heat exchanger combined with a secondary heat exchanger captures flue gas heat and condenses to utilize u tilize available latent energy. The stainless steel, pH-tolerant design features a weld-sealed assembly with no O -rings o O-rings or gaskets and does not require special glycol. ASME Section IV approved and stamped.
Fully Modulating Bu 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° p pattern along primaryy heat exchanger. KNIGHT XL to exceed g the entire length g of the p g This allows the compact p the capacity off un units multiple burners. the ca capa paci city ty o unit itss wi with th llarger arge ar gerr mu mult ltip iple le b urne ur ners rs.
Direct Venting up to 100 Feet Sidewall Vent Termination
K KNIGHT XL offers 7 venting options and tremendous flexibility for placement of units within the building, because it permits direct-vent air intake and exhaust runs up to 100 equivalent feet using either PVC, CPVC, Polypropylene or AL29-4C stainless steel vent pipe. A sidewall C vent termination kit is shipped standard with every KNIGHT boiler. ven Sidewall Vent Termination
R Refined Design D Puts P More M Control C and Information at your Fingertips Advan nced featu ures incclude:: • • • • • • • • • • • • • • • • •
Multi-Color Graphic LCD Display Navigation Dial USB Port Ability to control up to three different setpoint temperatures Compatibility with Copper-Fin II Non-Condensing Boiler to Create a Front-End Loading System Boilers with Different Inputs can be Cascaded Together to Maximize Boiler Plant Turndown Modbus Capability (Optional) DHW Modulation Limiting DHW Night Setback* 0-10 VDC Boiler Rate Output 0-10 VDC Signal to control variable speed boiler pump* 0-10 VDC System Pump Signal Input* Heat Demand from 0-10V Input Installer Can Program Name and Number into the Boiler Installer Adjustable Freeze Protection Parameters Separately adjustable SH/DHW Switching times* Installer access to BMS and ramp delay settings *Exclusive to Lochinvar Smart System
At-a-Glance Color Coding
Normal system operation.
Maintenance due - shows the installer’s name and number on the display.
New Selectable Cascade Options When mu ultiiple KNIGHT boile ers are e installed d together, r, the SMARTT SYS YSTEM built--in n sequencer can be set et fo or “Lead ad-Lag” casca ade or “Efficienccy Optimizzed d” ca ascad de operatio on.
Efficiency Optimized O C Cascade
The “lead” boiler modulates with demand to capacity. As demand increases, additional boilers fire and modulate to capacity. This continues, with additional boilers firing and modulating to capacity until all units are operating. Every 24 hours, the SMART SYSTEM automatically shifts the lead boiler role to the next in the sequence, distributing lead-lag runtimes equally.
This feature optimizes the modulation capabilities of the Boiler Plant while evenly distributing run time across all cascaded boilers. Every 24 hours the SMART SYSTEM automatically shifts the 1st boiler on role to the next in the sequence, distributing run time equally. SMART SYSTEM Cascade option allows 2 - 8 boilers to be sequenced.
7 Flexible Venting Options Direct Vent Sidewall
Direct Vent Vertical
Room Air Sidewall
Room Air Vertical
Vertical w/Sidewall Air
Direct Vent Vertical*
*Optional Concentric Vent Kit Sold Separately (for 400-601 Models)
Direct Vent Sidewall*
Knight night XL Boiler Dimensions and Spec Specifications LOW VOLTAGE ELECTRICAL CONNECTIONS
HIGH VOLTAGE ELECTRICAL CONNECTIONS
38-3/4" CONDENSATE DRAIN
H FLUE 18-3/4"
ols ntr Co ng Firi ut Inp /hr Btu
as al G tur Na
HEAT EXCHANGER DRAIN 3/4" NPT
l de Mo
Model Number Guide
Knight XL Boiler,
Natural Gas, 700,000 Btu/hr input,
Input Model Min Max Thermal Number MBH MBH Efficiency 80 100 120 140 160
399 500 600 700 800
1/4" - 1-1/4" ADJUSTABLE
M13 firing controls
Knight XL Heating Boiler
KBN400 KBN501 KBN601 KBN701 KBN801
94.0% 94.0% 94.0% 94.0% 94.0%
Dimensions and Specifications
Net Output AHRI Rating MBH MBH 376 470 564 658 752
327 409 490 572 654
42-1/2” 42-1/2” 42-1/2” 42-1/2” 42-1/2”
15-1/2” 15-1/2” 15-1/2” 15-1/2” 15-1/2”
27-3/4” 31-1/2” 36-1/4” 40-1/4” 45-1/4”
3-3/4” 3-3/4” 3-3/4” 3-3/4” 3-3/4”
20-3/4” 25-1/2” 25” 29” 33-1/4”
21” 21” 21” 23” 23”
14” 14” 14” 17” 17”
Gas Conn. 34” 34” 2” 18-3/4” 1” 32-1/2” 36” 2” 18” 1” 36” 32-3/4” 5-1/2” 19-1/2” 1” 36” 32-3/4” 3-1/4” 23-1/2” 1” 36” 32-3/4” 3-1/4” 27-3/4” 1”
Water Air Vent Shipping Conn. Inlet Size Wt. (lbs.) 1-1/2” 4” 4” 280 1-1/2” 4” 4” 310 2” 4” 4” 340 2” 4” 6” 370 2” 4” 6” 405
Notes: Indoor installation only. All information subject to change. Change “N” to “L” for LP gas models.
Smart System Features
> 94% Thermal Efficiency > SMART SYSTEM Digital Operating Control > Multi-Color Graphic LCD Display w/ Navigation Dial > Modulating Burner with 5:1 Turndown > Three Reset Temperature Inputs > Direct-Spark Ignition with curves for three set point temperature inputs > Low NOx Operation > Built in Cascading Sequencer for up to 8 Boilers > Sealed Combustion > Multiple Size Boiler Cascade > Low Gas Pressure Operation > Front end loading capability with Copper Fin II > ASME Stainless Steel Heat Exchanger > Lead Lag > ASME Certified, ”H” Stamped > Efficiency Optimization > Outdoor Reset Control with Outdoor Air Sensor Gasketless Heat Exchanger > Programmable System Efficiency Optimizers > 160 psi Working Pressure > Night Setback > 50 psi ASME Relief Valve > DHW Night Setback > Highly efficient, condensing design > Anti-Cycling > Vertical & Horizontal Direct-Vent > Outdoor Air Reset Curve > Category IV venting up to 100 feet > Ramp Delay > PVC, CPVC, Polypropylene or AL29-4C Venting > Boost Temperature & Time > Three Pump Control up to 100 Feet > Factory Supplied Sidewall Vent Termination > System Pump With Parameter for Continuous Operation > Boiler Pump With Variable Speed Pump Control* > Smart System Control > Domestic Hot Water Pump > Other Features > Domestic Hot Water Prioritization > On/Off Switch > DHW tank piped with priority in the boiler loop > Adjustable High Limit w/ Manual Reset > DHW tank piped as a zone in the system with the pumps controlled by the Smart System > Automatic Reset High Limit > DHW Modulation Limiting > Flow Switch > Separately Adjustable SH/DHW Switching Times* > Flue Temperature Sensor > Building Management System Integration > Low Air Pressure Switch > 0-10 VDC Input to Control Modulation or Set Point > Temperature & Pressure Gauge > 0-10 VDC Input Signal from Variable Speed System Pump* > Adjustable Leveling Legs > 0-10 VDC Modulation Rate Output > Condensate Trap > 0-10 VDC Input to Enable/Disable call for heat > Zero Clearances to Combustible Material > Access to BMS Settings through Display > 10 Year Limited Warranty (See Warranty)
Firing Codes > M9 > M7 > M13
*Exclusive feature, available only from Lochinvar
> Alarm Bell Standard Construction > Condensate Neutralization Kit) California Code > Concentric Vent Kit (KB400-KB601) CSD1 / FM / GE Gap (KB501-KB801) > BMS Gateway to LON or BacNet > High & Low Gas Pressure Switches Reset (KB501-KB801) w/ Manual Re Lochinvar, LLC 300 Maddox Simpson Parkway Lebanon, Tennessee 37090 P: 615-889-8900 / F: 615-547-1000
KBX-06 (Reprint KBX-06 5/13)
> High Voltage Terminal Strip > 120 VAC / 60 Hertz / 1 Phase Power Supply > Three sets of Pump Contacts with Pump Relays > Low Voltage Terminal Strip > 24 VAC Device Relay > Proving Switch Contacts > Flow Switch Contacts > Alarm on Any Failure Contacts > Runtime Contacts > DHW Thermostat Contacts > 3 Space Heat Thermostat Contacts > System Sensor Contacts > DHW Tank Sensor Contacts > Outdoor Air Sensor Contacts > Cascade Contacts > 0-10 VDC BMS External Control Contact > 0-10 VDC Boiler Rate Output Contacts > 0-10 VDC Variable Speed System Pump Signal Input > 0-10 VDC Signal to Control Variable Speed Boiler Pump > Modbus Contacts > Time Clock > Data Logging > Hours Running, Space Heating > Hours Running, Domestic Hot Water > Ignition Attempts > Last 10 Lockouts > Other Features > Low Water Flow Safety Control & Indication > Password Security > Inlet & Outlet Temperature Readout > Customizable Freeze Protection Parameters > Custom Maintenance Reminder with Contractor Info
> MODBUS Communication > Multi Temperature Loop Control > Low Water Cutoff w/Manual Reset & Test > Boiler Circulation Pump > SMART SYSTEM PC Software > Stainless Steel Vent Kits (KB701-KB801) > Stack Frame Registered Under U.S. Patents #7824178 and 7506617 FO-5M-10/13-Printed in U.S.A.