3
2
Installation
ModBus and BACnet Communication Instructions
Installation procedure - for Models WB,
WA, AW, KB, OA, OK and KBX
1. Turn OFF the main electrical power to the appliance.
2. Turn OFF the main manual gas shutoff to the appliance.
3. Assemble the communication control board to the sheet
metal base as shown in FIG. 2-1a and 2-1b, depending on
model.
4. Connect the power harness from the appliance to the
communication board through the sheet metal cover
hole (see FIG. 2-2a and 2-2b, depending on model).
5. Using the two (2) sheet metal screws provided in the kit,
attach the pre-painted sheet metal cover over the
Communication board for protection from line voltage
(FIG. 2-2a and 2-2b, depending on model).
6. Locate the pilot holes on the side of the jacket (left side if
AW/KB/KXL or right side if WB/WA), using the sheet
metal screws provided in the kit, mount the
communication board assembly to the appliance (FIG.
2-3a and 2-3b, depending on model).
Wiring
7. Disconnect power to the transformer by removing
connection “B”, see FIG. 2-4, page 4.
8. Connect A, C, D, and B (FIG. 2-4).
9. Connect the communication board to the control board
of the appliance (see FIG. 2-5 on page 4).
10. Turn on the main electrical power and the main manual
gas
shutoff to the appliance.
11. Confi gure the control board and unit controls per this
manual and resume operation.
MOUNT PRE-PAINTED
SHEET METAL COVER
OVER THE MODBUS
ASSEMBLY FOR PROTECTION
FROM LINE VOLTAGE
MODBUS
ASSEMBLY
ATTACH POWER HARNESS
TO MODBUS THROUGH
SHEET METAL COVER HOLE
Figure 2-2a
_Attach Cover to Communication Board for
Models WB, WA, AW, KB and KBX
BLT7068 [X4]
BLT2007 [X4]
SHEET METAL BASE
JKB40095
Figure 2-1a
_Assemble Communication Board for
Models WB, WA, AW, KB and KBX
NOTE:
KB/KXL/AW - MOUNT MODBUS ASSEMBLY TO THE LEFT SIDE OFTHE
JACKET. WB/WA - MOUNT MODBUS ASSEMBLY TO THE RIGHT SIDE OF THE JACKET.
- LOCATE THE PILOT HOLES
- USING THE 4 SHEET METAL SCREWS
PROVIDED IN THE KIT MOUNT THE MODBUS
ASSEMBLY TO THE UNIT
(SIDE DEPENDENT ON MODEL)
Figure 2-3a
_Mount Communication board to Unit for
Models WB, WA, AW, KB and KBX
SHEET METAL
BASE (JKB40265)
BLT2007
[X4]
BLT7068 [X4]
IMG00565
Figure 2-2b
_Attach Cover to Communication Board
for Models OA and OK
IMG00566
MODBUS
ASSEMBLY
MOUNT PRE-PAINTED
SHEET METAL COVER OVER
THE MODBUS ASSEMBLY FOR
PROTECTION FROM LINE VOLTAGE
ATTACH POWER HARNESS
TO MODBUS THROUGH
SHEET METAL COVER HOLE
BLT7404 [X4]
IMG00567
- LOCATE THE PILOT HOLES
- USING THE (2) SHEET METAL SCREWS PROVIDED
IN THE KIT MOUNT THE MODBUS ASSEMBLY TO THE UNIT
(SIDE AND ORIENTATION DEPENDENT ON MODEL /
VERTICAL ORIENTATION SHOWN)
NOTE:
OA/OK151 MOUNT MODBUS ASSEMBLY TO THE RIGHT SIDE JACKET FLANGE
OA/OK400-501 MOUNT MODBUS ASSEMBLY IN HORIZONTAL ORIENTATION
Figure 2-1b
_Assemble Communication Board for
Models OA and OK
Figure 2-3b
_Mount Communication board to Unit for
Models OA and OK
