2
Wiring Installation
All wiring should be in accordance with local ordinances
and the National Electrical Code, NFPA 70. Ensure the
power supply (voltage, frequency, and current carrying
capacity of wires) is in accordance with the motor name-
plate. Refer to the
Wiring Diagrams
, next page.
Do not use cooling tubes for electrical connections.
Upblast units have two wiring conduits. Upblast units have
two wiring conduits. The vertical conduit comes plugged.
The horizontal conduit is directly above vertical conduit.
! CAUTION !
Do not use vertical conduit if fan will be used
in a grease and/or heat exhaust application, use of the verti-
cal conduit does not conform to
NFPA 96
and
UL 762.
Lock off all power sources before the fan is wired to
power source.
Follow the wiring diagram in the disconnect switch
and the wiring diagram provided with the motor. Cor-
rectly label the circuit on the main power box and
always identify a closed switch to promote safety (i.e.,
red tape over a closed switch).
Fan With a Junction Box
a. Wire the motor using the junction box located on the
outside of the fan.
b. Reinstall the junction box cover and ensure that the
gasket forms a complete seal.
Fan Without a Junction Box
A field wiring compartment must be installed for wire con-
nections. Wire the motor by pulling the electrical wire
through the conduit. For further information refer to the
National Electrical Code and the wiring diagram provided on
the motor.
WARNING
All wires must be protected from abrasion when
passing through the opening of a field wiring com-
partment.
Personal Safety
Disconnect switches are recommended. Place
the disconnect switch near the fan in order that
the power can be swiftly cut off in case of an
emergency, and in order that maintenance per-
sonnel are provided complete control of the
power source.
Grease Terminator Installation
Final Installation Steps
a. Ensure fasteners and setscrews, particularly fan
mounting and bearing fasteners, are tightened accord-
ing to the recommended torque shown in the table
below,
Recommended Torque for Setscrews/Bolts
.
b. Inspect for correct voltage with voltmeter.
c. Ensure all accessories are installed.
d. Test the fan to be sure the rotation is the same as indi-
cated by the arrow marked
Rotation
.
Do not allow the fan to run in the wrong direction.
This will overheat the motor and cause serious dam-
age. For 3-phase motors, if the fan is running in the
wrong direction, check the control switch. It is possi-
ble to interchange two leads at this location so that the
fan is operating in the correct direction.
e. Inspect wheel-to-inlet clearance. Wheels may shift in
shipment. To realign wheel-to-inlet, shift upper bearing
so there is an equal radial clearance between the
wheel and inlet.
Sealing Nut
Fan Inlet Side
Lid
Terminator
VCR with Terminator
PVC
Extension
Sealing Nut
Recommended Torque for Setscrews/Bolts (IN/LB.)
Setscrews
Hold Down Bolts
Size
Key Hex
Across
Flats
Recommended
Torque
Min.
Max.
Size
Wrench
Torque
No.10
3/32”
28
33
3/8”-16
240
1/4”
1/8”
66
80
1/2”-13
600
5/16”
5/32”
126
156
5/8”-11
1200
3/8”
3/16”
228
275
3/4”-10
2100
7/16”
7/32”
29
348
7/8”-9
2040
1/2”
1/4”
42
504
1”-8
3000
5/8”
5/16”
92
1104
1-1/8”-7
4200
3/4”
3/8”
120
1440
1-1/4”-7
6000
