Installation

External Wiring

Motor Speed

3600 – 3000 RPM

1800 RPM & Slower

 

 

 

 

 

 

Internal Rotor Cooling Fan

 

 

 

 

 

 

(No. of poles)

(2 pole)

(4 or more poles)

 

 

DANGER

 

 

 

 

 

 

Rotor Material

Aluminum

Copper

Aluminum

 

Copper

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

500, 580

1

4

3

 

3

 

 

Hazardous voltage.

 

 

 

 

 

Frames

 

 

 

Will cause death, serious injury,

 

680, 800

N/A

4

N/A

 

3

 

 

electrocution or property damage.

 

Frames

 

 

 

 

 

 

 

 

1120 Frame

N/A

N/A

N/A

 

2

 

 

Disconnect all power before working on

 

 

 

 

this equipment.

 

1. Inspect

rotor to determine whether

alternative A or B

 

 

 

 

 

below applies;

 

 

 

 

 

 

 

 

 

A.

If the rotor has integrally cast directional fans,

NOTE

 

 

 

either rotor machining instructions and

 

 

 

conversion parts can be purchased from the

 

 

 

 

 

 

factory or the rotor core may be removed from

Before running motor, see Initial Start.

 

 

 

 

the shaft, switched end-for-end, and

 

Starting and overload control devices must be matched

 

remounted on the shaft.

 

 

 

B. If the rotor has shaft-mounted directional fans,

to motor rating. For safety or convenience they may

 

the fans must be interchanged end-for-end.

need to be installed some distance from the motor.

2. Replace single directional rotor fan with one for the

opposite direction.

 

 

 

 

Follow the control manufacturer’s instructions to make

 

 

 

 

3. Fans are bi-directional which allows motor rotation in

proper installations and connections. Observe the

either direction without mechanical modification.

 

following:

4. The single directional rotor fans must be interchanged

 

 

 

 

 

end-for-end.

 

 

 

 

1.Connect electrical power supply to conform with National Electric Code and any local regulations. Line voltage and wire capacity must match motor rating stamped on the nameplate.

2.With the driven equipment disconnected, momentarily energize the motor to check rotation.

3.If motor is three-phase type, reverse rotation (if required) by interchanging any two of the three power leads.

Changing Direction of RotationLook for rotation plates usually mounted on opposite drive end of the motor.

NOTE

It will be necessary to rebalance the rotor if the fans are changed.

Alignment

Accurate shaft alignment between motor and driven equipment is essential. Improper alignment may result in vibration, bearing overloads and excessive shaft stresses. Flexible couplings will not compensate for excessive misalignment.

CAUTION

Excessive heat.

Motor may overheat if motor cooling fans run in the wrong direction.

Run motor in direction shown on motor or change fans.

NOTE

A basic rule is to not have more than five shims in a shim pack under any one motor foot. Thick shim packs consisting of many thin shims will cause soft foot, excessive vibration or twisted frame (motor foot out of plane).

The internal rotor fan direction must be considered if changing direction of rotation. See the following Internal Rotor Cooling Fan table to identify which motors have directional fans.

In addition, for Type CAZ motors with shaft mounted external cooling fan, the fan is directional and must be replaced with a fan designed for the desired direction of rotation.

Parallel Alignment

After positioning unit for correct end float, separate the coupling halves and mount a dial indicator rigidly on one coupling half with the button on the cylindrical surface of the other half. Rotate the shafts together, and take readings at top, bottom and side positions. Align shaft so difference between top and bottom readings and the side readings is a maximum of 0.002 inch for a flexible coupling.

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