LC COOK HLC-D, Инструкция по установке, эксплуатации и обслуживанию, Страница: 6 / 8

6 LC IO&M B51031-004
Wheel/Inlet Overlap
Size Overlap
100–165 3/16”
180–245 1/4”
270–300 5/16”
330–365 3/8”
402 7/16”
445–490 1/2”
540 13/16”
OVERLAP
RADIAL
CLEARANCE
WHEEL SHROUD
INLET
Troubleshooting
Problem and Potential Cause
Low Capacity or Pressure:
• Incorrect direction of rotation. Make sure the fan rotates
in same direction as the arrows on the motor or belt drive
assembly
• Poor fan inlet conditions. There should be a straight clear
duct at the inlet
• Improper wheel alignment
Excessive Vibration and Noise:
• Damaged or unbalanced wheel
• Belts too loose; worn or oily belts
• Speed too high
• Incorrect direction of rotation. Make sure the fan rotates
in same direction as the arrows on the motor or belt drive
assembly
• Bearings need lubrication or replacement
• Fan surge
Overheated Motor:
• Motor improperly wired
• Incorrect direction of rotation. Make sure the fan rotates
in same direction as the arrows on the motor or belt drive
assembly
• Cooling air diverted or blocked
• Improper inlet clearance
• Incorrect fan RPMs
•
Incorrect Voltage
Overheated Bearings:
• Improper bearing lubrication
•
Excessive belt tension