20
Air Handler
WIRING DIAGRAM
(NEW)
Legend
Field Wiring
Factory Wiring:
Low Voltage
High Voltage
6/22
10434350
NOTES:
1. The blower motor speed tap connection may not be as shown. See the Installation Instructions.
2. Disconnect all power before servicing.
3. Transformer may have a dual voltage primary tap. Match the tap position with the supply voltage used.
4. If the internal wiring is replaced, use only 105°C copper wire of the same gauge.
CAP.
1
3
5
2
1
2
4
6
HEATER PLUG
RELA
Y
RELAY
Y
L2
L1
EAC
COOL
HEAT
W G
R
C
R
C
L2
L1
-
7 6 5 4 3 2 1
1=COM
2=CAP.
3=CAP.
4=HI
5=MED
6=LOW
240
24 V
208
COM
TRANSFORMER
R
C
LOCATION OF
“T” CONNECTOR
MOTOR
3-SPEED
4-PIN PLUG (18)
BLOWER
LIMIT
BLOWER
LIMIT
CUT WIRES TO REMOVE PLUG HOUSING
WHEN HEATER KIT NOT INSTALLED
BLACK
RED
WHITE
BROWN
BROWN
BLACK
WHITE
RED
GRAY
YELL
OW
WHITE
GREEN GRA
Y
RED
RED
BLA
CK
BLW DTC
R
BLACK
IF BOARD
EQUIPPED
WITH
BLWDTC
TERMINAL
CONNECT TO W ON CONTROL BOARD ONLY
WHEN ELECTRIC HEATER KIT IS INSTALLED
CONNECT TO WHITE WIRE ON HEATER KIT ONLY
WHEN ELECTRIC HEATER KIT IS INSTALLED
WHITE WIRE FROM
ELECTRIC HEATER
KIT ACCESSORY
BLUE
BLUE
BLUE
Figure 15.
B64BM Wiring Diagram
