Kees KS FILTERED SUPPLY FANS - Manual (Page 2)

BELT REPLACEMENT AND TENSION ADJUSTMENT
WARNING: This unit has rotating parts. Use appropriate safety precautions during operating and
maintenance. ALWAYS disconnect power prior to working on the fan.
To remove belt(s), loosen the motor plate adjustment bolts and slide the motor plate so the belt(s) slip easily over
the rim of the pulley. Install new belt(s). To adjust the belt tension, slide the motor plate until proper tension is
achieved. For proper tension, a deflection of approximately 1/4” per foot of shaft center distance should be
obtained by firmly pressing the belt. Refer to figure 1. Tighten the motor plate bolts firmly after adjusting the belt
tension. Check the pulley alignment before returning the fan to operation.
PULLEY ALIGNMENT
WARNING: This unit has rotating parts. Use appropriate safety precautions during operating and
maintenance. ALWAYS disconnect power prior to working on the fan.
Pulley alignment is adjusted by loosening the motor pulley setscrew and moving the motor pulley on the motor
shaft. Correct pulley alignment is shown in figure 2.
TROUBLESHOOTING
Low Capacity or Pressure Overheated Motor
Incorrect direction of rotation Motor improperly wired
Poor fan discharge conditions or closed damper Incorrect direction of rotation
Improper wheel alignment Incorrect fan RPM
Excessive Vibration or Noise Incorrect voltage
Damaged or unbalanced wheel
Belts loose, worn or oily
Overheated Bearings
Speed to high Excessive belt tension
Incorrect direction of rotation
Bearing failure or worn shaft
Fan surge (unstable operating point)
WARRANTY
KEES, INC. warrants it’s products to be free from defects in material and workmanship for a period of one year
from the date of purchase. Any products which prove to be defective during the warranty period will be repaired
or replaced at our option when returned to our factory, shipping prepaid. KEES will not be responsible for any
installation or removal costs, any consequential damages or other costs.
Fan motors are warranted by the motor manufacturer. Contact KEES for the specifics of motor fan warranty if
required.
FanI&M 02/05
Figure 1
Figure 2