Nortek B5BM Series - Page 24

24
CIRCUIT
BREAKERS
SUPPLYVOLTAGE
GROUND
LIMIT
LIMIT
BLACK
BLACK
BLACK
BLOWER
MOTOR
PLUG
6 5 4
3 2 1
WIRING DIAGRAM
Air Handler with Factory Installed Heat (15 kW)
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.
W2 W1
O
Y/Y2
G R C
4 SPD. MOTOR
1 2 3 5 6 4
TRANSFORMER
24V
BLACK
RED
WHITE
BLACK
WHITE
FUSE
L2 COM 2
L2
L2 COM
L1
VS POWER
XFMR
COOL
HEAT
24 VAC
RED
COM
GREY
P3
Y1
HEATER KIT PLUG
3
2
1
6
5
4
7
710588B (Replaces 710588A)
BLACK
BLACK
RED
1 = COM 2 = HIGH 3 = MED HIGH 4 = MED LOW 5 = LOW 6 = OPEN
1 = COM 2 = HIGH 3 = MED HIGH 4 = MED LOW 5 = LOW 6 = OPEN
BROWN
GREY
ORANGE
BLUE
YELLOW
YELLOW
BLUE
ORANGE
GREY
RELAY
RELAY
RELAY
ELEMENT
ELEMENT
ELEMENT
RED
RED
RED
POWER
PLUG
RED
RED
RED
RED
BLACK
BLACK
BLACK
¢710588J¤
Figure 18. Wiring Diagram for B5BM Series Air Handler (15kW)