Greenheck Fan Greenheck ERV Manual: Comprehensive Guide for Energy Recovery Ventilation Systems
Page 25

Vibration

Excessive vibration may be experienced during initial start-up. Left unchecked, excessive vibration can cause a multitude of problems, including structural and/or component failure. The most common sources of vibration are listed.

Many of these conditions can be discovered by

 

careful observation.

 

Wheel Unbalance

Refer to the

Drive Pulley Misalignment

Troubleshooting

Incorrect Belt Tension

section of this manual

Bearing Misalignment

for corrective actions.

Mechanical Looseness

If observation cannot

Faulty Belts

locate the source of

Drive Component Unbalance

vibration, a qualified

Poor Inlet/Outlet Conditions

technician using

Foundation Stiffness

 

vibration analysis

 

equipment should be consulted. If the problem is

wheel unbalance, in-place balancing can be done.

Generally, fan vibration and noise is transmitted to other parts of the building by the ductwork. To eliminate this undesirable effect, the use of heavy canvas connectors is recommended.

Energy Recovery Wheel

The ERV models contain a total energy recovery wheel. The wheels are inspected for proper mechanical operation at the factory. However, during shipping and handling, shifting

can occur that may affect wheel operation. The wheel

is accessible through Inside layout of ERV-361 the access door marked

“Energy Wheel Cassette

Access”. For the ERV- 251, 361, 521, and 522, the wheel cassette(s) slide out. Due to the size and weight of the ERV-

581 and 582 wheels, they

remain stationary and all

maintenance is performed Inside layout of ERV-522in place. There is room inside the unit to perform energy recovery wheel servicing.

Turn the energy

recovery

 

Bearing

Adjustable

Support

wheels by

 

Air Seals

 

hand to verify

 

free operation.

 

 

The wheel

 

 

should rotate

Drive Belt

Label

smoothly and

showing

 

cassette

should not

 

 

serial #

wobble.

 

and date

 

Drive Pulley

code

 

 

Drive Belt

Inspect the drive belt. Make sure the belt rides smoothly through the pulley and over the wheel rim.

Air Seals

Check that the air seals located around the outside of the wheel and across the center (both sides of wheel) are secure and in good condition. Air seal clearance is determined by placing a sheet of paper, to act as a feeler gauge, against the wheel face. To access seals, enter the unit for the ERV-581 and 582, or pull out the cassette for the ERV-251, 361, 521, and 522, following the instructions in the Energy Recovery Wheel Maintenance section. To adjust the air seals, loosen all eight seal retaining screws. These screws are located on the bearing support that spans the length of the cassette through the wheel center. Tighten the screws so the air seals tug slightly on the sheet of paper.

Replace cassette into unit, plug in wheel drive, replace access door and apply power. Observe by opening door slightly (remove filters if necessary to view wheel) the wheel should rotate freely at about 50-60 RPM.

Model ERV Energy Recovery Unit 25

Page 24 Page 26
Image 25
Page 24 Page 26
Contents Models ERV-251 ERV-361 ERV-521 ERV-581 ERV-522 ERV-582 General Safety InformationReceiving Inspection and Maintenance during StorageUnpacking HandlingSupplemental Installation Operation and Maintenance Manuals Table of ContentsInstallation Basic OperationRecommended Roof Opening LiftingCurb Outside Dimensions Curb Outside Dimensions and WeightsRoof Curb Mounting Ductwork ConnectionsRail Mounting / Layout ERV-251, ERV-361, ERV-521, ERV-581 ERV-522, ERV-582 Service ClearancesArrangement a Arrangement B, C or DElectrical Information Field Control Wiring Length/GaugeUnit Accessories ERV-251, ERV-361, ERV-521, ERV-581 ERV-522 Access Panel Description and LocationOutdoor Air Dimensional Data Arrangement C Arrangement D ERV-522 Unit Size Exterior DimensionsFrost Threshold Temperatures Indoor RH @ 70F Optional AccessoriesFrost Control Application/Operation Economizer Application/Operation Testing Temperature Sensor with OverrideModulating the Wheel Enthalpy Sensor with OverrideFactory Set Points Variable Frequency Drives for Energy Recovery BlowersDrive Operation Resetting the drive to factory defaults Variable Frequency Drives for Energy Recovery WheelEconomizer Signal Source 10 VDCTransformer 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 Hand/Off/Auto SwitchSensors 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 MotorsDoor Seal Maintenance External Filter MaintenanceEnergy Recovery Wheel Maintenance Internal Filter MaintenanceRemoving the Energy Recovery Wheel in ERV-251 Accessing the Energy Recovery Wheel in Models ERV-522Wheel segment removed Energy Recovery Wheel Belt Cleaning the Energy Recovery WheelEnergy Recovery Wheel Bearing Inside layout of ERV-361 Inside layout of ERV-522 Parts ListSequence of Operation Other AccessoriesBasic Unit Summer OperationTroubleshooting Airflow Symptom Possible Cause Corrective Action Troubleshooting UnitTroubleshooting Unit Maintenance Log Warranty

ERV-361, ERV-251, ERV-521, ERV-582, ERV-522 specifications

Greenheck Fan has established itself as a leader in the design and manufacturing of high-performance ventilation systems, including its innovative energy recovery ventilators (ERVs). Among their popular models are the ERV-581, ERV-522, ERV-582, ERV-521, and ERV-251, each designed to enhance indoor air quality while optimizing energy efficiency.

The ERV-581 offers comprehensive ventilation solutions for commercial buildings, equipped with advanced heat recovery technology. This model features a robust, compact design, allowing for easy installation in limited spaces. Its efficient energy recovery capabilities transfer heat and moisture between incoming and outgoing airstreams, leading to significant reductions in heating and cooling costs. The ERV-581 also includes a user-friendly control panel for simplified operation.

Next in line, the ERV-522 is engineered for larger spaces, balancing higher airflow rates with enhanced energy recovery performance. This model is particularly beneficial for schools and office buildings, where maintaining fresh air quality is paramount. The ERV-522 employs a two-stage filtration system, ensuring that airborne pollutants are effectively captured before being circulated back into the environment. Its resilient construction further ensures longevity and durability in demanding applications.

The ERV-582 enhances the lineup with its dual-function capability, serving both as an energy recovery ventilator and a dehumidification system. This flexibility makes it an ideal choice for climates with high humidity levels, where moisture control is essential. The ERV-582 incorporates Greenheck’s patented technology for optimal performance under varying temperature and humidity conditions, making it a versatile solution for diverse environments.

The ERV-521 stands out with its eco-friendly design, featuring recyclable components that align with sustainable building practices. This model is particularly favored in LEED-certified projects, where energy efficiency and minimal environmental impact are essential. The ERV-521 also includes an intelligent control system that adjusts airflow rates based on occupancy levels, ensuring optimal energy usage.

Finally, the ERV-251 is a compact, energy-efficient model suited for residential installations. It is designed to fit seamlessly into homes, providing essential ventilation while reducing energy consumption. The user-friendly interface allows homeowners to monitor and adjust settings easily, making the ERV-251 a popular choice for those looking to improve indoor air quality without compromising on comfort.

Together, these Greenheck ERV models exemplify cutting-edge technologies and engineering, paving the way for healthier indoor environments while promoting energy conservation. Each unit is tailored to meet specific application needs, making them invaluable assets for any ventilation strategy.
Top Page Image Contents