Nortek B5BM Series - Page 25

25
WIRING DIAGRAM
710543B (Replaces 710543A)
Air Handler with Factory Installed Heat (20 kW)
X13 MOTOR
Legend
Field Wiring
Factory Wiring:
Low Voltage High Voltage
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.
POWER
PLUG
W2 W1
O
Y/Y2
G R C
X13 MOTOR
1 2
3
5
4
TRANSFORMER
24V
BLACK
RED
WHITE
BLACK
WHITE
FUSE
BLOWER MOTOR PLUG
C
L G N
N = NEUTRAL G = GROUND L = LINE C = COMMON
L2
L2
L2 COM
L1
L1
XFMR
X13 COOL
X13 HEAT
24 VAC
RED
COM
GREY
Y1
C
L
G
N
WHITE
X13 COM
RED/BLACK
GREEN/YELLOW
1 2
3 4 5
5 = HI 4 = MED HI 3 = MED 2 = MED LOW 1 = LOW
SPEED TAPS
5=HI 1=LOW 2=MED LO 3=MED 4=MED HI
C=COM L=LINE G=GROUND N=NEUTRAL
P3
HEATER KIT PLUG
3
2
1
6
5
4
7
RED
BLACK
CIRCUIT
BREAKERS
SUPPLY VOLTAGE
GROUND
LIMIT
BLACK
BLACK
BLACK
RED
RED
RED
BLACK
LIMIT
RED
GREY
ORANGE
BLUE
YELLOW
BROWN
RELAY
RELAY
RELAY RELAY
ELEMENT
ELEMENT
ELEMENT
ELEMENT
RED
RED
RED
RED
RED
BLACK
BLACK
BLACK
BLUE
ORANGE
GREY
YELLOW
BROWN
¢710543¦¤
Figure 19. Wiring Diagram for B5BM Series Air Handler with X-13 Motor (20 kW)