Troubleshooting; Warranty - Greenheck SQ 60-75 Installation, Operation And Maintenance Manual

Troubleshooting

WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.
PROBLEM
Wheel unbalance
Bad bearings
Belts too tight or too loose
Excessive noise
or vibration
Wheel improperly aligned and
rubbing
Loose drive or motor pulleys
Foreign objects in wheel or housing
System resistance too high
Unit running backwards
Reduced airflow
Excessive dirt buildup on wheels
Improper wheel alignment

Warranty

Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the
shipment date. Any units or parts which prove to be 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's Centrifugal Inline Fans catalog, Models SQ
and BSQ provides additional information describing the
equipment, fan performance, available accessories, and
specification data.
®
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com
12
472058 • SQ/BSQ, Rev. 3, October 2011
CAUSE
Clean all dirt off wheel. Check wheel balance, rebalance in place if
necessary.
Replace.
Adjust tension, see Figure 12.
Center wheel on inlet, see Figure 9.
Align and tighten. See "Pre Start-Up Checks", see page 6-7.
Remove objects, check for damage or unbalance.
Check system: Proper operation of backdraft or control dampers,
obstruction in ductwork, clean dirty filters.
Correct as shown in Figure 10.
Clean wheel.
Center wheel on inlets, see Pre Start-Up Checks and Figure 9.
CORRECTIVE ACTION
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.
Copyright 2011 © Greenheck Fan Corporation