Lochinvar Knight 81 Instructions Manual page 4

2
Installation
Figure 2-4_Harness Connections_WB, WA, AW, KB, KBX, OA, and OK models
Figure 2-5_Connect Communication Board to Control Board
CONNECT TO
CONTROL BOARD
FROM COMMUNICATION
BOARD*
4
FROM POWER
HARNESS
A C
B
B
G
W W
W B
G
ROUTE THROUGH
JACKET HARNESS
CLIPS
USE SUPPLIED CABLE TIE
TO CONNECT MODBUS POWER
HARNESS TO BLOWER POWER
WIRES (RED, WHITE, GREEN)
*HARNESSES CAN ONLY BE CONNECTED ONE WAY.
ModBus and BACnet Communication Instructions
TO TRANSFORMER
D B
B
W
GY
G
LOW VOLTAGE
CONNECTION BOARD
CONNECT TO
CONNECTION BOARD
FROM COMMUNICATION
BOARD*
R BL
G