3
FCE/FCRU IO&M
B51150-003
Wiring Diagrams
Single Speed, Single Phase Motor
T-1
T-4
Ground B
L 2
L1
Ground A
Line
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-1 and T-4.
2 Speed, 2 Winding, Single Phase Motor
Ground A
Ground B
T-1
T-4
Low Speed
High Speed
L1
L2
Line
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-1 and T-4 leads.
Single Speed, Single Phase, Dual Voltage
Ground B
J-10
T-5
Ground A
Link A
Link B
Low Voltage
Line
L 2
L 1
Ground A
Link A & B
L1
L2
Line
Ground B
T-5
J-10
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-5 and J-10 leads.
Typical Damper Motor Schematic
Fan
Motor
Damper
Motor*
Second
Damper
Motor
Transformer**
Transformer**
L3
L2
L1
For 3 Phase, damper motor voltage should be the same between L
1
and
L
2
. For single phase application, disregard L
3
.
*Damper motors may be available in 115, 230 and 460 volt models. The
damper motor nameplate voltage should be verified prior to connection.
**A transformer may be provided in some installations to correct the
damper motor voltage to the specified voltage.
3 Phase, 9 Lead Motor
4 5 6
1
7
2
8
3
9
L1 L2 L3
4 5 6
7 8 9
1 2 3
L1 L2 L3
Low Voltage
208/230 Volts
High Voltage
460 Volts
3 Phase, 9 Lead Motor
Y-Connection
7
1
6
7 8 9
4 5 6
1 2 3
Low Voltage
208/230 Volts
High Voltage
460 Volts
8
2
4
9
3
5
L1
L3
L2
L1
L3
L2
3 Phase, 9 Lead Motor
Delta-Connection
To reverse, interchange any 2 line leads.
2 Speed, 1 Winding, 3 Phase Motor
Motor
1
2
3
4
5
6
Together
High Speed
Line
L1
L 2
L 3
1
2
3
4
5
6
Open
Low Speed
Line
L1
L 2
L 3
Motor
To reverse, interchange any 2 line leads. Motors require magnetic
control.
2 Speed, 2 Winding, 3 Phase
L
1
T
1
T
2
T
3
Low Speed
Low Speed
Low Speed
High Speed
High Speed
High Speed
Motor
T
13
T
12
T
11
L
2
Line
L
3
To reverse: High Speed-interchange leads T
11
and T
12
. Low Speed-in-
terchange leads T
1
and T
2
. Both Speeds-interchange any 2 line leads.
Operation
Pre-Start Checks
1. Lock out all the primary and secondary power sources.
2. Inspect and tighten fasteners and setscrews, partic-
ularly fan mounting and bearing fasteners. Refer to
Torque Chart
.
3. Inspect belt tension and pulley alignment. Refer to
Belt
and Pulley Installation
, page 5.
4. Inspect motor wiring. Refer to
Wiring Installation
.
5. Ensure belt touches only the pulleys.
6. Rotate the wheel to ensure it rotates freely.
7. Ensure fan and ductwork are clean and free of debris.
8. Close and secure all access doors.
9. Restore power to fan.
Start-Up
Turn on the fan. In variable speed units, set the fan to its
lowest speed. Inspect for the following:
• Direction of rotation
• Excessive vibration
• Unusual noise
• Bearing noise
• Improper belt alignment or tension (listen for squealing)
• Improper motor amperage or voltage
If a problem is discovered, immediately shut the
fan off. Lock out all electrical power and check for
the cause of the trouble. Refer to
Troubleshooting
on page 7.
