Baldor MN605 Installation And Operating Manual

Contents

Baldor MN605 Installation And Operating Manual Manual pdf 12 page image

2-4MN605Table 2-5 Minimum Blower CFM for DPBV Motors (Drip Proof Blower Ventilated)Blower Size Motor FrameSizeBlower CFM Blower Static Pressure(In H 2O)LM2 180 55 0.50LM3 180 150 1.45LM3 210 175 1.45LM3 250 215 0.78LM4 280 350 0.88LM6 320 780 2.80LM6 360 780 2.80LM6 400 820 2.50LM8 504-506 1120 1.58LM9 508-5012 2000 5.00Each motor nameplate is stamped with the above data for DPBV (less Blower), DPSV and TEPV enclosures.Caution: Motors designed for forced ventilation must have cooling air when fields are excited at rated voltage.Installations having the air supply interrupted when the motor is not operating must have fielddisconnected or field voltage reduced to 67% rated by means of field economizing resistor and relay ormotor insulation life will be significantly reduced.Initial Start-Up If driven equipment can be damaged by rotating in the wrong direction, uncouple the motor from the load beforechecking for rotation.Caution: Series wound motors must never be allowed to run with no load (broken belt etc.) An unloaded motor mayreach destructive high speeds.If the direction of rotation needs to be corrected, disconnect the input power supply and interchange theappropriate leads. Refer to the motor connection diagrams in Section 4 of this manual.1. The first start-up and running of the motor should be with the motor uncoupled from the load.2. Check the direction of rotation by momentarily applying power to the motor.3. With the motor running, make sure it’s running smoothly without too much noise or vibration. If either arepresent, shut down the motor immediately and find the cause of the problem.Coupled Start-Up1. After the first successful no load start-up, stop the motor and assemble the coupling.2. Align the coupling and be sure it is not binding in any way.3. The first coupled start-up should be without load. Check to see that the driven equipment is not transmittingany vibration back to the motor through the coupling or the base. Vibrations (if any) should be withinacceptable levels.4. Run about 1 hour with driven equipment unloaded.5. After completing these steps, the motor can now be loaded.6. Do not exceed the value of armature nameplate amperes under steady continuous loads.