Section 1
General Information
2-4 Installation & Operation
MN409
WARNING:
This equipment is at line voltage when AC power is connected. Disconnect and lockout all
ungrounded conductors of the ac power line before proceeding. Failure to observe these
precautions could result in severe bodily injury or loss of life.
First Time Start Up
Be sure that all power to motor and accessories is off. Be sure the motor shaft is disconnected from
the load and will not cause mechanical rotation of the motor shaft.
1.
Hold down bolts must be tight. Torque hold down bolts as follows:
Frame
Minimum Hold Down
Bolt Torque
G5000/G315
100 Ib.
−
ft. (136 Nm)
G5800/G40
125 lb.
−
ft. (170 Nm)
G50
150 Ib.
−
ft. (204 Nm)
2.
If the motor has been idle for a long period of time after installation, check insulation resistance.
3.
Check the incoming power to be sure that line voltage, frequency and phase are correct for the
motor (refer to the motor nameplate).
4.
Inspect all electrical connections for proper termination, clearance, mechanical strength and
electrical continuity.
5.
Be sure all shipping materials and braces (if used) are removed from motor shaft.
a.
For sleeve bearing motors check the lubrication system to insure the oil reservoirs and constant
level oilers (when provided) have been filled to the proper oil level with the appropriate oil type.
Do not overfill oil reservoirs.
b.
Motors operating with a forced lubrication system must have the forced lubrication system
operating before starting the motor.
6.
Manually rotate the motor shaft to ensure that it rotates freely.
7.
When the driven machine is likely to be damaged by the wrong direction of rotation, it is best to
uncouple the motor from its load during the check for rotation and/or during the initial start.
Some motors are designed for a single direction of rotation as indicated by nameplates. Running
those units in the wrong direction will reduce airflow causing overheating. Check to see that both the
motor and driven equipment are operating in the correct direction of rotation. If it is necessary to
change rotation, disconnect and lockout all input power and interchange any two input power
phases.
8.
Replace all panels and covers.
9.
Momentarily apply power and check the direction of rotation of the motor shaft.
10. If motor rotation is wrong, be sure power is off and change the motor lead connections.
Verify rotation direction before you continue.
11. Start the motor and ensure operation is smooth without excessive vibration or noise. If so, run the
motor for 1 hour with no load connected.
12. Check bearing temperatures frequently if bearing temperature detectors are provided. They should
not exceed 195
°
F (90
°
C). At initial start, the bearing temperature rate of rise will be high. This rate of
rise should decrease within 30 minutes. If this rate of rise does not decrease or the temperature
exceeds 90
°
C, stop the motor.
13. Ensure that the protective controls are functioning properly before any prolonged operation.
14. Run the motor for at least two hours.
This Manual:http://www.manuallib.com/baldor/mn409-large-ac-motors-handbook.html
