Installation

External Wiring

DANGER

Hazardous voltage.

Will cause death, serious injury, electrocution or property damage.

Disconnect all power before working on this equipment.

NOTE

Before running motor, see Initial Start.

Starting and overload control devices must be matched to motor rating. For safety or convenience they may need to be installed some distance from the motor. Follow the control manufacturer’s instructions to make proper installations and connections. Observe the following:

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 Rotation

Look for rotation plates usually mounted on fan housing of the motor.

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.

External fan direction must be considered if changing direction of rotation is contemplated on motors equipped with shaft mounted external fans. See the following Motor Fan Direction table to identify which motors have directional external fans. All directional fans must be replaced with a fan designed for the desired direction of rotation.

Motor Fan Direction

 

 

Motor Speed

 

Frame

3600 – 3000

1800 – 1500

1200 RPM &

 

RPM

RPM

SLOWER

 

 

 

 

500

 

 

 

 

 

 

 

580

 

NON-DIRECTIONAL

 

 

 

 

708

 

 

 

 

 

 

 

788

DIRECTIONAL

 

 

 

 

 

880

 

 

 

 

 

 

 

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.

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).

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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