Trouble Shooting, Warranty | Greenheck Fan HRE-20, HRE-90, HRE-45

Trouble Shooting

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	Exhaust Only frost control	Adjust frost temperature sensor set point as needed.
Back on After	sensors are tripping.
About 2 Minutes	sensors are tripping.
About 2 Minutes

	Air seals are too tight.	See Energy Recovery Wheel on page 16.
	“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
	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
Energy Wheel	tripping, due to rubbing	Energy Recovery Wheel on page 16.
Runs Intermittently	tripping, due to rubbing	Energy Recovery Wheel on page 16.
Runs Intermittently	between wheel and air seals.
	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
	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.

Due to continuing product development Greenheck has the right to change specifications without notice

GREENHECK

		P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410	IOM HRE FS
Copyright © 2002 Greenheck Fan Corp.	®	PH. 715-359-6171	Rev. 2, July 2002
		www.greenheck.com

HRE-55, HRE-45, HRE-90, HRE-20 specifications

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