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8 457691 • Models CW/CWB, Rev. 5, September 2008 Copyright 2008 © Greenheck Fan Corp
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of
one year from the purchase date. Any units or parts which prove defective during the warranty period will
be replaced at our option when returned to our factory, transportation prepaid. Motors are warranted by the
motor manufacturer for a period of one year. Should motors furnished by Greenheck prove defective during
this period, they should be returned to the nearest authorized motor service station. Greenheck will not be
responsible for any removal or installation costs.
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Greenheck Catalog Series C provides additional information describing the
equipment, fan performance, available accessories, and specication data.
®
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com
Warranty
AMCA Publication 410-96, Safety Practices for Users and Installers of Industrial
and Commercial Fans, provides additional safety information. This publication
can be obtained from AMCA International, Inc. at: www.amca.org.
Troubleshooting
WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.
PROBLEM CAUSE CORRECTIVE ACTION
Excessive Noise
or Vibration
Bad Bearings Replace.
Wheel unbalance
Clean and remove all dirt buildup off wheel. Check wheel
balance, rebalance in place if necessary.
Belts too tight or too loose Adjust tension, see gure 12a-b.
Wheel improperly aligned and
rubbing
Center wheel on inlet, see gure 7.
Loose drive or motor pulleys Align and tighten. See “Pre-Starting Checks”, see page 4-6.
Foreign objects in wheel or
housing
Remove objects, check for damage or unbalance.
Reduced airow
System resistance too high
Check system: Proper operation of backdraft or control
dampers, obstruction in ductwork, clean dirty lters.
Unit running backwards Correct as shown in gure 8.
Excessive dirt buildup on wheels Clean wheel.
Improper wheel alignment Center wheel on inlets, see Pre-Starting checks and gure 7.
CWB Belt Drive Centrifugal Sidewall Exhaust Fan
Mounting Plate
Windband
Birdscreen
Breather Tube
Motor Compartment
Wheel Cover