Baldor Reliance CDX7150 Installation & Operating Manual page 13

Blower Ventilation System
Before loading a force-ventilated motor, be sure that the blowers, cooling fans, or central air supply
systems are operating properly to supply cooling air to the motor. Air filters should also be in place. If you
energize the main fields with the motor at standstill, the blowers or external cooling systems must be left
on. This will prevent excessive heat buildup that will decrease the life of the insulation.
When using field economy circuits to reduce the voltage to the main fields during standstill, blowers do
not need to be left on.
Blower motors should be checked for correct rotation. Don't rely on feeling airflow from the drive end of
the motor. Look at the outline drawing or rotation arrow shown on the blower housing. Refer to Figure
2-1.
Air Inlet
Housing
Impeller
Blades
Airflow
Size Motor Frame
LM2 180
LM3 180
LM3 210-250
LM4 280
LM6 320-400
LM8 504-506
LM9 508-5012
Note: Motor mounted blower units. Mount on commutator end (opposite drive end of motor. We supply
blowers that are powered by totally enclosed motors (standard). Blowers have a cast aluminum fan
housing with washable, wire mesh filters.
2-4 Installation & Operation
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Figure 2-1 View from Air Inlet (Motor is on Opposite Side)
Table 2−4 Electrical Data - Forced Ventilation Blower Units
HP RPM
1/40 3000
1/8 3450 115/230
1/8 3450 208-230/460
1/3 3450 208-230/460
1 3450 208-230/460
3/4 1750 208-230/460
3 3450 208-230/460
Volts Phase
230 1
1
3
3
3
3
3
Hz Amps
60 0.4
50/60 2.6/1.3
50/60 0.66-0.60/0.30
50/60 1.5-1.4/0.7
50/60 3.1-3.0/1.5
50/60 3.4-3.2/1.6
50/60 8.2-7.6/3.8
MN605