Troubleshooting – Unit

Symptom

Possible Cause

Corrective Action

 

 

 

One or both

 

 

blowers turn off

 

Adjust frost temperature sensor set point as

intermittently and

Exhaust Only frost control sensors are tripping.

needed.

back on after

 

 

 

about 2 minutes

 

 

 

 

 

 

Air seals are too tight.

See Energy Recovery Wheel under Unit Start-Up

 

section.

 

 

 

 

 

 

“Economizer” sensors are operating.

Adjust temperature or enthalpy set points as

 

needed.

 

 

 

 

 

Energy wheel does

No power to wheel motor.

Make sure wheel drive is plugged in. Verify

NOT turn

power is available.

 

 

 

 

 

Wheel drive belt.

Check for loose or broken belts. Replace belts

 

(consult factory).

 

 

 

 

 

 

VFD overload. (OL1 on readout)

Refer to VFD section. Compare motor amp

 

rating to setting in VFD. Adjust accordingly.

 

 

 

 

 

Energy wheel runs

Wheel motor overloads are tripping, due to

Recheck air seals, make sure they are not too

tight. See Energy Recovery Wheel under Unit

intermittently

rubbing between wheel and air seals.

Start-Up Section.

 

 

 

 

 

 

Fan wheel rubbing on inlet.

Adjust wheel and/or inlet cone. Tighten wheel

 

hub or bearing collars on shaft.

 

 

 

 

 

 

Bearings.

Replace defective bearing(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.

 

 

 

 

Belts too loose.

Adjust belt tension after 24 hours of operation.

Excessive noise

 

 

Belts too tight.

Loosen to maintain a 3/8 inch deflection per

or vibration

foot of span between sheaves.

 

 

 

 

 

 

Worn belt.

Replace.

 

 

 

 

Motor base or blower loose.

Tighten mounting bolts.

 

 

 

 

Buildup of material on wheel.

Clean wheel and housing.

 

 

 

 

Bearing and drive misaligned.

Realign.

 

 

 

 

 

Make sure ductwork is supported properly.

 

Noise being transmitted by duct.

Make sure ductwork metal thickness is sized for

 

proper stiffness. Check duct size at discharge to

 

 

 

 

ensure that air velocities are not too high.

 

 

 

Always have a completed Pre Start-Up Checklist, unit Start-Up Checklist, and Optional Accessories Checklist prior to requesting parts or service information.

Model ERVe Energy Recovery Unit 29

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Greenheck Fan ERVe manual Troubleshooting Unit

ERVe specifications

The Greenheck Fan ERVe series stands at the forefront of energy-efficient ventilation solutions, specifically designed to meet the growing demands for energy conservation and enhanced indoor air quality in commercial buildings. As part of Greenheck's commitment to innovation, the ERVe series offers a variety of models tailored to diverse applications, including schools, hospitals, and office buildings.

One of the key features of the ERVe series is its advanced energy recovery technology. The ERVe utilizes a heat recovery wheel that efficiently transfers heat and moisture between the exhaust and incoming airstreams. This process significantly reduces heating and cooling loads on HVAC systems, promoting energy savings and improving overall system efficiency. By reclaiming energy that would otherwise be wasted, the ERVe ensures that buildings not only conform to energy codes but also contribute to sustainability goals.

The ERVe series is designed with versatility in mind. It offers multiple configurations, including vertical and horizontal orientations, which makes it adaptable to various installation environments. Additionally, the unit can be equipped with a range of options such as pre-filters, post-filters, and variable speed drive motors, allowing for customization based on specific application needs. This adaptability ensures that the ERVe can meet the specific air quality requirements of different spaces while maintaining optimal airflow.

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Overall, the Greenheck Fan ERVe series represents a significant advancement in ventilation technology, combining energy efficiency, customizable features, low noise operation, and durability. These characteristics ensure that the ERVe is a reliable choice for modern commercial buildings striving for improved air quality and reduced energy consumption.