Nortek B5BM Series - Page 23

23
WIRING DIAGRAM
710541B (Replaces 710541A)
Air Handler with Factory Installed Heat (8 kW, 10kW)
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.
GREY
ORANGE
ELEMENT
ELEMENT
BLACK
GREY
BLACK
GREY
BLUE
ORANGE
POWER
PLUG
LIMIT
RED
RED
RED
RED
BLACK
BLACK
RED
BLACK
RELAY
RELAY
TERMINAL BLOCK (for select models only
)
CIRCUIT BREAKER (Circuit breaker models only)
BLUE
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
GROUND
SUPPLY VOLTAGE
RED
BLACK
¢710541s¤
Figure 17. Wiring Diagram for B5BM Series Air Handler with X-13 Motor (8kW & 10 kW)