Greenheck Fan 90, HRE-20 Direction of Fan Wheel Rotation, Fan RPM, Vibration, Rotation Direction

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unit start-up

Direction of Fan Wheel Rotation

Blower access is labeled on unit.. Check for proper wheel rotation by momentarily energizing the fan.. Rotation is determined by viewing the wheel from the drive side and should match the rotation decal affixed to the fan housing (see Rotation Direction figures).. If the wheel is rotating the wrong way, direction can be reversed by interchanging any two of the three electrical leads.. Check for unusual noise, vibration, or overheating of bearings.. Refer to the Troubleshooting section of this manual if a problem develops..

Fan RPM

Supply fan and exhaust fan will have an adjustable motor pulley (on 15 HP and below) preset at the factory to the customer specified RPM.. Fan speed can be increased or decreased by adjusting the pitch diameter of the motor pulley.. Multi- groove variable pitch pulleys must be adjusted an equal number of turns open or closed.. Any increase in fan speed represents a substantial increase in load on the motor.. Always check the motor amperage reading and compare it to the amperage rating shown on the motor nameplate when changing fan RPM.. All access doors must be installed except the control center door.. Do not operate units with access doors open or without proper ductwork in place as the fan motors will overload.

 

 

 

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Rotation Direction

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 below..

1.Wheel Unbalance

2.Drive Pulley Misalignment

3.Incorrect Belt Tension

4.Bearing Misalignment

5.Mechanical Looseness

6.Faulty Belts

7.Drive Component Unbalance

8.Poor Inlet/Outlet Conditions

9.Foundation Stiffness

Many of these conditions can be discovered by careful observation.. Refer to the Troubleshooting section of this manual for corrective actions.. If observation cannot locate the source of vibration, a qualified technician using 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..

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Contents Read and Save These INSTRUCTIONS461248 Indirect Evaporative CoolerDirect Evaporative Cooler TABLE OF Contents StorageBasic Operation Installation Safety WarningLifting Roof Curb Mounting Ductwork Connections Rail MountingSupply Weatherhood Exhaust WeatherhoodElectrical Information Exploded Detail Terminal Strip TYPICAL CONTROL CENTER COMPONENTSService Clearances / access panel locations HRE-20 HRE-45HRE-55 HRE-90 Model Exterior Dimensions HRE-20 Dimensional Data / Access Door DescriptionsOverall Exterior Dimensions Model Dimensional dataStandard Trap and Supply Line Configuration Evap Module InstallationEvaporative Cooling Modules Evap Module START-UPWater Flow Adjustment DevicePump and Float Components HRE Water SUPPLY CONNECTION LocationTop View Trap & Supply Line Configuration with Auto Drain and Fill EvaporativeEvaporative FreezeTimer ProtectionWater Control Options for Evaporative Cooling Auto Drain and Fill with Freeze ProtectionDrain Trap Drain and Overflow Connection Locations Symptom Solution Troubleshooting for evaporative moduleEvaporative Cooling Maintenance Electric Heater Application/Operation Optional accessoriesElectric Preheater Post-Heater Control PanelTimer Frost Threshold TemperaturesTesting Frost Control Application/OperationModulating the Wheel Enthalpy Sensor With Override Economizer Application/OperationYaskawa Yaskawa E7 Variable Frequency Drives for BlowersFactory Setpoints Modulating Control 0-10 VDC for FAN Speed Variable Frequency Drives for Energy Recovery WheelTransformer Wiring DiagramDirty Filter Sensor Rotation SensorService Outlet CO2 SensorVapor Tight Lights Remote Control Panel and Wiring Schematics Optional AccessoriesIndicator Lights powered by the ER Unit Remote Panel Wiring SchematicsHeating/Cooling Switches and Night Setback Switch/Timer Sensors Mounted by Factory Temperature Sensors 1K Ohm RTDStart-Up Checklist for unit Safety DangerSafety Caution Start-Up Checklist Start-Up Checklist for Evaporative CoolerSpecial Tools Required Optional Accessories section Optional Accessories ChecklistEconomizer Application / Operation section Variable Frequency Drives sectionFans Forward Curved Type Unit start-upFan Performance Modifications Fan Belt DrivesFan RPM Direction of Fan Wheel RotationVibration Rotation DirectionDrive Belt Air SealsInside layout of HRE unit Date Routine maintenanceDampers LubricationFan Belts Fan MotorsInternal Filter Maintenance External Filter MaintenanceDoor Seal Maintenance BearingsEnergy Recovery Wheel Maintenance Access to wheel through Outdoor air filter doorWheel segment removed Wheel Bearing Wheel Belt & PulleyModel HRE Parts ListBasic Unit Sequence of OperationSummer Operation Winter OperationTest and Balance Report Pressure Drop Across Energy Recovery WheelDesign Airflow Measured AirflowSymptom Possible Cause Corrective Action TroubleshootingWarranty
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45, 55, 90, HRE-20 specifications

The Greenheck Fan HRE series, specifically the models HRE-20, HRE-90, HRE-55, and HRE-45, represents a blend of innovation and efficiency in the HVAC industry. Built for both commercial and industrial applications, these exhaust fans stand out due to their robust design and advanced operational features.

One of the main features of the HRE series is its energy-efficient motor design. These fans come equipped with a premium efficiency motor that reduces energy consumption while maintaining high performance. The motors are specifically designed to provide exceptional airflow while operating at lower sound levels, ensuring a quieter environment.

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Overall, the Greenheck Fan HRE-20, HRE-90, HRE-55, and HRE-45 exemplify a commitment to quality and efficiency in commercial and industrial ventilation solutions. Their combination of energy efficiency, advanced design, durability, and user-friendly features make them a leading choice for those seeking reliable airflow solutions. These fans not only meet current industry standards but also set a benchmark for performance and innovation in the HVAC sector.
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