Greenheck Fan CW/CWB CWB Belt Drive Centrifugal Sidewall Exhaust Fan, Troubleshooting, Warranty

CWB Belt Drive Centrifugal Sidewall Exhaust Fan

Windband

Birdscreen Motor Compartment

Mounting Plate

Wheel	Cover
Breather Tube

Troubleshooting

WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.

PROBLEM	CAUSE	CORRECTIVE ACTION
	Bad Bearings	Replace.
	Wheel unbalance	Clean and remove all dirt buildup off wheel. Check wheel
		balance, rebalance in place if necessary.
Excessive Noise	Belts too tight or too loose	Adjust tension, see figure 12a-b.
	Wheel improperly aligned and
or Vibration		Center wheel on inlet, see figure 7.
	rubbing
	Loose drive or motor pulleys	Align and tighten. See “Pre-Starting Checks”, see page 4-6.
	Foreign objects in wheel or	Remove objects, check for damage or unbalance.
	housing
	System resistance too high	Check system: Proper operation of backdraft or control
		dampers, obstruction in ductwork, clean dirty filters.
Reduced airflow	Unit running backwards	Correct as shown in figure 8.
	Excessive dirt buildup on wheels	Clean wheel.
	Improper wheel alignment	Center wheel on inlets, see Pre-Starting checks and figure 7.

Warranty

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 specification data.
	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.

Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com

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457691 • Models CW/CWB, Rev. 5, September 2008 Copyright 2008 © Greenheck Fan Corp