Greenheck Fan ERVe manual Troubleshooting Unit

Page 29

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

Image 29
Contents Model ERVe General Safety Information Installation, Operation and Maintenance ManualReceiving Inspection and Maintenance during StorageUnpacking HandlingSupplemental Installation Operation and Maintenance Manuals Table of ContentsInstallation Basic OperationLifting with a Crane Roof Curb and Rail MountingLifting with a Forklift Recommended Roof OpeningDuctwork Connections Curb Outside Dimensions and WeightsRoof Curb Mounting Rail Mounting / Layout Service ClearancesAccess Panel Description and Location Duct Dimensions Unit Size Dimensional DataElectrical Information Electric Heater Application/Operation Typical Control Center ComponentsOutdoor Air Weatherhood Unit AccessoriesExhaust Weatherhood DampersFrost Control Application/Operation Optional AccessoriesEconomizer Application/Operation Testing Temperature Sensor with OverrideModulating the Wheel Enthalpy Sensor with OverrideDrive Operation Variable Frequency Drives for Energy Recovery BlowersFactory Set Points 10 VDC Variable Frequency Drives for Energy Recovery WheelEconomizer Signal Source Transformer Typical Wiring DiagramRotation Sensor Service OutletDirty Filter Sensor CO2 SensorIndicator Lights powered by the ER Unit Remote Control Panel and Wiring SchematicsDay Timer or On/Off Switch Dirty Filter Indicator power by othersSensors Mounted by Factory Temperature Sensors 1K Ohm RTDPressure Sensors analog or digital Amp Current Sensors analog or digitalStart-Up Checklist Pre Start-Up Checklist check as items areStart-Up General Start-Up InformationOptional Accessories section Optional Accessories ChecklistEconomizer Application / Operation section Variable Frequency Drives sectionUnit Start-Up Vibration Energy Recovery WheelDrive Belt Air SealsMaintenance Procedures Lubrication Routine MaintenanceFan Belts Fan MotorsInternal Filter Maintenance External Filter MaintenanceDoor Seal Maintenance Fan Wheel & FastenersEnergy Recovery Wheel Maintenance Sequence of Operation Parts ListTroubleshooting Airflow Symptom Possible Cause Corrective Action Troubleshooting UnitTroubleshooting Unit Maintenance Log Model ERVe Energy Recovery Unit Warranty

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.

Another significant characteristic of the ERVe series is its low noise operation. The design incorporates advanced acoustical features, including sound attenuators and insulated panels, which minimize sound transmission and enhance occupant comfort. As noise control becomes increasingly important in settings like educational institutions and healthcare facilities, the ERVe series excels in providing a peaceful indoor environment.

Moreover, the ERVe series is engineered with durability in mind. Constructed from high-quality materials, the units are built to withstand the rigors of continuous operation. The robust design not only extends the service life of the equipment but also reduces maintenance requirements, leading to lower overall operational costs.

In terms of control and monitoring, the ERVe series is compatible with various building management systems, allowing for integration into sophisticated HVAC controls. This feature enables real-time data tracking and optimization, enhancing the efficiency of indoor climate management.

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.