Product Overview

Lochinvar, LLC
300 Maddox Simpson Parkway
Lebanon, Tennessee 37090
P: 615.889.8900 / F: 615.547.1000
Lochinvar.com
45”
24”
C
D
3 1/2"
20"
5 3/4"
12"
19 1/4"
E
38"
10 1/2"
F
20 1/2"
ELECTRICAL
CONNECTIONS
OUTLET INLET
GAS
DRAIN
FLUE
AIR INLET
CONDENSATE
DRAIN
KNIGHT XL COMMERCIAL GAS BOILER DIMENSIONS & SPECIFICATIONS
KBX0400N 399,000 39,900 97% 387 337 33-1/2" 42-1/2" 29-3/4" 20-1/4" 1" 2" 4" 4" 365
KBX0500N 500,000 50,000 97% 485 422 33-1/2" 42-1/2" 29-3/4" 20-1/4" 1" 2" 4" 4" 377
KBX0650N 650,000 65,000 97% 631 549 42-1/2" 53" 30-1/2" 15-1/4" 1-1/4" 2" 4" 6" 456
KBX0800N 800,000 80,000 97% 776 675 42-1/2" 53" 30-1/2" 15-1/4" 1-1/4" 2" 4" 6" 484
KBX1000N 999,000 99,900 97% 969 843 50" 62" 30-1/2" 15-3/4" 1-1/4" 2-1/2" 6" 6" 567
Model
Number
Input MBH
Thermal
Efficiency
Gross
Output
MBH
Net AHRI
Rating
MBH
Max
Btu/Hr
Min
Btu/Hr C D E F
Gas
Conn.
Water
Conn.
Air
Inlet
Vent
Size
Ship.
Weight (lbs.)
KNIGHT XL HEATING BOILER DIMENSIONS & SPEC I FI CA TIONS
STANDARD FEATURES
> 97% Thermal Efficiency
> Modulating Burner with 10:1 Turndown
Direct Spark Ignition
Low NOx Operation
Sealed Combustion
Low Gas Pressure Operation
> Stainless Steel Water Tube Heat Exchanger
ASME-Certified, “H” Stamped
160 psi Working Pressure
50 psi Relief Valve
Combustion Analyzer Test Port
Fully Welded Design
> Vertical and Horizontal Direct Vent
Direct Vent up to 150 feet
PVC, CPVC, Polypropylene or AL29-4C
Factory Supplied Sidewall Vent Termination
> Smart System Control
> Other Features
On/Off Switch
Adjustable High Limit with Manual Reset
Automatic Reset High Limit
Flow Switch
Flue Temperature Sensor
Low Air Pressure Switch
Temperature and Pressure Gauge
Condensate Trap
10-Year Limited Warranty (See Warranty)
SMART SYSTEM FEATURES
> CON·X·US Remote Connect
> Smart Touch Touchscreen Operating Control
> Full Color 7” Touchscreen LCD Display
> Loch-N-Link
®
USB Thumb Drive Port for Easy
Programming
> Cascading Sequencer with Built-in Redundancy
Selectable Cascade Type:
Lead Lag/Efficiency Optimization
Multiple Size Boilers
Front-End Loading
> 3 Reset Temperatures Inputs w/Independent
Outdoor Reset Curves for Each
Outdoor Sensor
> Three-Pump Control
System Pump with Parameter for Continuous
Operation
Boiler Pump with Variable-Speed Control
Domestic Hot Water Boiler Pump
> Building Management System Integration
0-10 VDC Input to Control Modulation or Setpoint
0-10 VDC Input from Variable-Speed System Pump
0-10 VDC Modulation Rate Output Signal
0-10 VDC Enable/Disable Signal
> Programmable System Efficiency Optimizers
Space Heating Night Setback
DHW Night Setback
Anti-Cycling
Ramp Delay
Boost Time and Temperature
> High-Voltage Terminal Strip
120 VAC/60 Hertz/1 Phase
Pump Contacts for 3 Pumps
> Low-Voltage Terminal Strip
Proving Switch Contacts
Alarm Contacts
Runtime Contacts
3 Space Heat Thermostat Contacts
Tank Thermostat Contacts
System Sensor Contacts
Tank Sensor Contacts
Cascade Contacts
0-10 VDC BMS Contacts
0-10 VDC Boiler Rate Output Contacts
0-10 VDC Boiler Pump Speed Contacts
0-10 VDC System Pump Speed Contacts
ModBus/BACnet Contacts
> Time Clock
> Data Logging
Ignition Attempts
Last 10 Lockouts
Space Heat Run Hours
Domestic Hot Water Run Hours
Custom Maintenance Reminder with Contact Info
Password Security
Customizable Freeze Protection Parameters
OPTIONAL EQUIPMENT
Wireless Outdoor Temperature Sensor
Multi-Temperature Loop Control
Variable-Speed Boiler Circulator
Constant-Speed Boiler Circulator
Common Vent Damper Kit
ModBus Communication
BMS Gateway to BACnet or LonWorks
BACnet MSTP
Alarm Bell
Condensate Neutralization Kit
Concentric Vent Kit (KBX0400-KBX500)
Low Water Cutoff w/Manual Reset & Test
High and Low Gas Pressure Switches w/Manual
Reset (KBX0500-KBX1000)
> Firing Controls
M9-Standard Construction
M13-CSD-1/FM/GE Gap (KBX0500-KBX1000)
M7 California Code
Change 'N' to 'L' for LP Gas models. No derate for LP models. Performance data is based on manufacturer test results. All informaon is subject to change.
For technical information call 800-722-2101. Lochinvar, LLC reserves the
right to make product changes or improvements without prior notice.
KBX-09 (replace KBX-08 10/19)
ASB 2.5K - 5/2021-Printed in U.S.A.
*The Net AHRI Water Rangs shown are based on a piping and pickup allowance of 1.15. *Lochinvar should be consulted before selecng a boiler for installaons having
unusual piping and pickup requirements, such as intermient system operaon, extensive piping systems, etc. *The rangs have been determined under the provisions
governing forced dra burners.