Lochinvar KBN399 Manual Do Utilizador

The Brain That Drives 

Brilliant Performance!

2-Line, 16-Character LCD Display 

Setup and diagnostic information in words, not codes

Password Security 

Dual password levels for installer and user

Building Management System Control (0 – 10 V )

BMS-driven input for control of modulation rate or temperature

PC Connection

Can be used with KNIGHT XL PC software to program and 
troubleshoot SMART SYSTEM functions, and to track historical 
data, including faults, trends and energy consumption

Outdoor Reset

Outdoor temperature monitor guides the reset schedule to meet 
heat loss/load of the building 

Night Setback 

Program a setback for any time of the day, each day of the week

System Pump Control and Boiler Pump Control

Switching contacts control power to both system and boiler 
pumps on a call for heat. Programmable pump delay orders 
pumps to operate after a call has been satisfied

Pump Relay with Freeze Protection

Ensures water temperature does not fall below 40°F

Hot  Water Generator Compatibility 

One boiler in a sequence can be assigned for Domestic Hot Water 
Prioritization (DHWP) to meet domestic water demand

Inlet/Outlet and System Temperature Sensors 

Installer can select which sensor controls the setpoint

Low Water Flow Indicator

Protects against high temperature differential in the heat 
exchanger with reduced firing rate or shutdown

Product Service Indicator 

Program reminders for cycle count, operation hours or last service

Field Connection Versatility

User-friendly terminal strip allows for 28 low-voltage field 
connections. Plus 4 line voltage connections supply power to
the unit, and up to 3 pumps operated by the SMART SYSTEM

15-1/2”

zero clearance
to combustibles

That Drives 

P

!