Siemens Medallion 1200 Instruction Manual download pdf (Page 7)

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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

Frame

Motor Speed

3600 – 3000

RPM

1800 – 1500

RPM

1200 RPM &

SLOWER

500

580

SH400

NON-DIRECTIONAL

SH560

880

DIRECTIONAL

SH450

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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Siemens Medallion 1200 Instruction Manual Page 7

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