User Manual

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) are in accorda nce with the motor nameplate.

Lock off all power sources before unit is wired to power source.

Leave enough slack in the wiring to allow for motor movement when adjusting belt tension. Some fractional motors have to be

removed in order to make the connection with the terminal box at the end of the motor. To remove the motor, remove bolts

securing motor bas e to po wer assembly. Do not rem ove motor mou nting bolts. T he fans will have a hol e provided at the base of

the bearing pedestal to accommodate wiring.

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

personnel are provided complete control of the power source.

Follow the wiring diagram in the disco nnect switch an d the wiring diagram provided with the motor. Correctly label the

circuit on the main pow er box and always identify a closed switch to promote safety (i.e. red tape over a clo sed switch).

Wiring Diagrams

Single Speed, Single Phase Mo to r

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.

3 Phase, 9 Lead Motor

To reverse, interchange any 2 line leads.

2 Speed, 2 Winding, Sing le Phase Mo to r

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.

2 Speed, 1 Winding, 3 Phase Motor

To reverse, interchange any 2 line leads. Motors require magnetic

control.

Single Speed, Single Phase, Dual Voltage

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.

2 Speed, 2 Winding, 3 Phase

To reverse: High speed-interchange leads T11 & T12.

Low speed-interchange leads T1 & T2. Both speeds-interchange any

2 line leads.