Nordyne MB7BM Series User Manual

25
Figure 15. Wiring Diagram for MB7EM Series Air Handler
WIRING DIAGRAM
7110760
Air Handler with Fixed Speed High Efficiency Motor
Legend
Field Wiring
Factory Wiring:
Low Voltage High Voltage
¢711076(¤
0510
1 2
240
24 V
208 COM
TRANSFORMER
R
C
HEATER PLUG
L
Y1
W2
W1
O
Y/Y2
G
R C
L2
L1
EAL
HUM
L1 L2 C R
EXPANSION
EXPANSION
MOTOR
TEST
R C Y DEHUM
TWIN
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
1 2 3 4 5 6
9-PIN HOUSING
9-PIN PLUG
6-PIN PLUG
HARNESS
BLACK
WHITE
GRAY
RED
BLACK
RED
WHITE
BLACK
MOTOR
6-PIN PLUG
HARNESS
WHITE
BLACK
BLUE
GREEN
YELLOW
ORANGE
RED
BROWN
BLUE
GREEN
ORANGE
RED
BROWN
YELLOW
CUT WIRES TO REMOVE PLUG HOUSING WHEN HEATER KIT NOT INSTALLED
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.
GREEN

Nordyne MB7BM Series Specifications

General

Brand	Nordyne
Model	MB7BM Series
Category	Air Handlers
Language	English