Troubleshooting

Symptom

Possible Cause

Corrective Action

 

 

 

One or Both

Blower fan motor overloads are

Decrease fan speed..

Blowers Turn Off

tripping and auto-resetting..

 

Intermittently and

Exhaust Only frost control

Adjust frost temperature sensor set point as needed..

Back on After

sensors are tripping..

 

About 2 Minutes

 

 

 

 

 

 

 

Air seals are too tight..

See Energy Recovery Wheel under Unit Start-Up section..

 

‘Economizer’ sensors are

Adjust temperature or enthalpy set points as needed..

Energy Wheel

operating..

 

Does NOT Turn

No power to wheel motor.

Make sure wheel drive is plugged in.. Verify power is

 

 

 

available..

 

Wheel drive belt

Check for loose or broken belts.. Replace belts (consult

 

 

factory)..

 

 

 

Energy Wheel

Wheel motor overloads are

Recheck air seals, make sure they are not too tight.. See

tripping, due to rubbing

Energy Recovery Wheel under Unit Start-Up Section..

Runs Intermittently

between wheel and air seals..

 

 

 

 

 

 

 

Fan wheel rubbing on inlet

Adjust wheel and/or inlet cone.. Tighten wheel hub or bearing

 

 

collars on shaft..

 

Bearings..

Replace defective bearings (s).. Lubricate bearings.. Tighten

 

 

collars and fasteners..

 

Wheel out of balance..

Replace or rebalance..

 

Loose wheel on shaft..

Tighten wheel setscrew..

 

Loose motor or blower sheave..

Tighten sheave setscrew..

Excessive Noise or

Belts too loose..

Adjust belt tension after 24 hours of operation..

Vibration

Belts too tight..

Loosen to maintain a 3/8 inch deflection per foot of span

 

 

 

between sheaves..

 

Worn belt..

Replace..

 

Motor base or blower loose..

Tighten mounting bolts..

 

Build-up of material on wheel..

Clean wheel and housing..

 

Bearing and drive misaligned..

Realign..

 

Noise being transmitted by

Make sure duct work is supported properly.. Make sure duct

 

duct..

work metal thickness is sized for proper stiffness.. Check duct

 

 

size at discharge to ensure that air velocities are not too high..

*Always provide the unit model and serial number when requesting parts or service information. *Always check motor amps and compare to nameplate rating.

Warranty

Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the purchase date.. The energy recovery wheel is warranted to be free from defects in material and workmanship for a period of five years 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..

#461248 IOM HRE FS

Rev.. 4, April 2012

Copyright © 2012 Greenheck Fan Corp..

Page 44
Image 44
Greenheck Fan HRE-20, 90, 55, 45 manual Warranty

45, 55, 90, HRE-20 specifications

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