Greenheck Fan Greenheck ERV Manual: Essential Guide for Energy Recovery Ventilation Units
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All dimensions are in inches.

Lifting

1.Before lifting, be sure that all shipping material has been removed from unit.

2.To assist in determining rigging requirements, weights are shown below.

3.Unit must be lifted by all lifting lugs provided on base structure.

4.Rigger to use suitable mating hardware to attach to unit lifting lugs.

5.Spreader bar(s) must span the unit to prevent damage to the cabinet by the lift cables.

6. Always test-lift the unit to check for proper

balance and rigging before hoisting to desired

location.

Recommended Roof Opening

V

EXHAUST

INTAKE

U

SUPPLY

DISCHARGE

0.50

0.50

ERV-251, 361, 521 and 581

U

 

EXHAUST

 

 

 

INLET

SUPPLY DISCHARGE

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ERV-522 and 582

7.

Never lift units by weatherhoods.

8.

Never lift units in windy conditions.

9.

Preparation of curb and roof openings should be

 

completed prior to lifting unit to the roof.

10.

Check to be sure that gasketing has been applied

 

to the curb prior to lifting the unit and setting on

 

curb.

11.

Do not use fork lifts for handling unit.

Position the unit roof

opening such that the supply discharge and exhaust inlet of the unit will line up with the corresponding ductwork. Be sure to allow for the recommended service

Unit Size

U

V

 

 

 

ERV-251

26.5

20

 

 

 

ERV-361

43

26

 

 

 

ERV-521

58

35

 

 

 

ERV-581

60

30

 

 

 

ERV-522

62

36

 

 

 

ERV-582

77

38

 

 

 

 

Unit Weights

 

 

 

Unit Size

 

Approx. Weight (lbs)*

 

 

 

ERV-251

 

340

 

 

 

ERV-361

 

860

 

 

 

ERV-521

 

1290

 

 

 

ERV-581

 

1470

 

 

 

ERV-522

 

3230

 

 

 

ERV-582

 

3700

 

 

 

*Weight assumes outdoor unit with filters, weatherhoods and outdoor air intake damper.

clearances when positioning opening

(see Service Clearances). Do not face the outdoor air intake of the unit into prevailing wind and keep the intake away from any other exhaust fans. Likewise, position the exhaust discharge opening away from outdoor air intakes of any other equipment.

When cutting only duct openings, cut opening 1 inch (25mm) larger than duct size to allow clearance for installation. Area enclosed by roof curb must comply with clearance to combustible materials. If the roof is constructed of combustible materials, area within the roof curb must be ventilated, left open, or covered with non-combustible material which has an “R” value of at least 5. If area within curb is open, higher radiated sound levels may result.

Where the supply or warm air duct passes thru a combustible roof, a clearance of one inch must be maintained between the outside edges of the duct and combustible material in accordance with NFPA Standard 90A.

4Model ERV Energy Recovery Unit

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Contents General Safety Information Models ERV-251 ERV-361 ERV-521 ERV-581 ERV-522 ERV-582Inspection and Maintenance during Storage ReceivingUnpacking HandlingTable of Contents Supplemental Installation Operation and Maintenance ManualsInstallation Basic OperationLifting Recommended Roof OpeningCurb Outside Dimensions and Weights Curb Outside DimensionsRoof Curb Mounting Ductwork ConnectionsRail Mounting / Layout Service Clearances ERV-251, ERV-361, ERV-521, ERV-581 ERV-522, ERV-582Arrangement a Arrangement B, C or DField Control Wiring Length/Gauge Electrical InformationUnit Accessories Access Panel Description and Location ERV-251, ERV-361, ERV-521, ERV-581 ERV-522Outdoor Air Dimensional Data ERV-522 Unit Size Exterior Dimensions Arrangement C Arrangement DFrost Threshold Temperatures Indoor RH @ 70F Optional AccessoriesFrost Control Application/Operation Testing Temperature Sensor with Override Economizer Application/OperationModulating the Wheel Enthalpy Sensor with OverrideFactory Set Points Variable Frequency Drives for Energy Recovery BlowersDrive Operation Variable Frequency Drives for Energy Recovery Wheel Resetting the drive to factory defaultsEconomizer Signal Source 10 VDCTypical Wiring Diagram TransformerService Outlet Rotation SensorDirty Filter Sensor CO2 SensorRemote Control Panel and Wiring Schematics Indicator Lights powered by the ER UnitDay Timer or On/Off Switch Hand/Off/Auto SwitchTemperature Sensors 1K Ohm RTD Sensors Mounted by FactoryPressure Sensors analog or digital Amp Current Sensors analog or digitalPre Start-Up Checklist check as items are Start-Up ChecklistStart-Up General Start-Up InformationOptional Accessories Checklist Optional Accessories sectionEconomizer Application / Operation section Variable Frequency Drives sectionUnit Start-Up Energy Recovery Wheel VibrationDrive Belt Air SealsRoutine Maintenance Maintenance Procedures LubricationFan Belts Fan MotorsExternal Filter Maintenance Door Seal 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 Parts List Inside layout of ERV-361 Inside layout of ERV-522Other Accessories Sequence of OperationBasic Unit Summer OperationTroubleshooting Airflow Troubleshooting Unit Symptom Possible Cause Corrective ActionTroubleshooting 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.
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