Siemens Medallion 1200 Instruction Manual download pdf (Page 9)

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Installation

Hot Alignment

It is possible for the motor shaft height to change

relative to the driven equipment and this should be

compensated for during the alignment procedure.

Heat from driven equipment can also cause horizontal

misalignment.

WARNING

Rotating parts.

Can cause serious injury.

Disconnect and lock out power before working on

equipment.

If motor application is abnormal (high temperature,

extreme vibration, etc.) consult the factory for special

instructions or additional information.

Check for vertical alignment (parallelism) of coupled

drive as follows:

1. Operate unit until normal temperature is reached

(may require several hours).

2. Shut down motor and lock out switch.

3. Mount dial indicator as in Figure 2.

4. Rotate shaft, noting readings at 0°, 90°, 180°, and

270° (both sides, top, and bottom). If within 0.002

inch total indicator reading, or other limit specified

by the factory, unit is satisfactory for operation.

5. If not within limits, add or remove shims as

required to raise or lower motor.

6. If shims are changed for high temperature

operation, repeat alignment procedure to extent

necessary to assure proper alignment. Document

readings for warranty information.

Figure 2. Check of Vertical Alignment

Vibration

The standard unfiltered housing vibration limits

measured at no load, uncoupled, and with rigid

mounting are as follows based on the requirements of

NEMA MG1-7.8.

Speed

Velocity, inches/sec peak

1200 – 3600 RPM

0.120

1000 RPM

0.105

900 RPM

0.096

750 RPM

0.079

720 RPM

0.075

600 RPM

0.063

After alignment is complete and foot mounting bolts are

tight, run motor at no load (or minimum possible).

Check for vibration. If excessive vibration exists and

the alignment is acceptable, check foot plane by

loosening one drive end-mounting bolt at a time as

detailed below. This is to be documented for warranty

information. When resiliently mounted, allowed levels

are 25% higher.

Base or foundation rigidity can also affect vibration;

check for resonance in supporting structure.

Recheck alignment after any change in shims and

document alignment readings for warranty information.

Completing Mechanical Installation

After controlling rotor end float and establishing

accurate alignment, it is recommended to drill and

ream the foundation plate and motor feet together for

dowel pins. (See Doweling).

Recheck parallel and angular alignment before bolting

the coupling together. Motor shaft should be level

within 0.03 inch after alignment.

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Siemens Medallion 1200 Instruction Manual Page 9

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