Greenheck Fan 55, HRE-20, 90, 45 manual Drive Belt, Air Seals, Inside layout of HRE unit

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Adjustable
Air Seals
Drive Belt

unit start-up

Energy Recovery Wheel

The HRE models contain a sensible 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 the access door marked “Energy Wheel Cassette Access”.. For the HRE-20 AND HRE-45 models, the wheel cassette slides out. Due to the size and weight of the HRE-55 AND HRE-90 wheels, they remain stationary and all maintenance is performed in place.. There is room inside the unit to perform energy recovery wheel servicing..

Turn the energy recovery wheels by hand to verify free operation..

The wheel should rotate smoothly and should not wobble..

Inside layout of HRE unit

Drive Belt

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

Air Seals

Air seals are located around the perimeter of the wheel and across the face of the wheel (both sides of wheel).. Check that these seals are secure and in good condition..

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 unit for HRE-55 & HRE-90, or pull out the cassette for HRE-20 & HRE- 45, following the instructions in 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 theDrive Pulley length of the cassette through the wheel center..

Tighten the screws so the air seals tug slightly on the sheet of paper..

Bearing Support

Label showing

cassette serial #

and date code

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) that the wheel rotates freely at about 35 RPM..

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Contents Indirect Evaporative Cooler Read and Save These INSTRUCTIONS461248Direct Evaporative Cooler Storage TABLE OF ContentsBasic Operation Safety Warning InstallationLifting Roof Curb Mounting Supply Weatherhood Rail MountingDuctwork Connections Exhaust WeatherhoodElectrical Information TYPICAL CONTROL CENTER COMPONENTS Exploded Detail Terminal StripHRE-20 HRE-45 Service Clearances / access panel locationsHRE-55 HRE-90 Overall Exterior Dimensions Model Dimensional Data / Access Door DescriptionsModel Exterior Dimensions HRE-20 Dimensional dataEvaporative Cooling Modules Evap Module InstallationStandard Trap and Supply Line Configuration Evap Module START-UPHRE Water SUPPLY CONNECTION Location Water Flow Adjustment DevicePump and Float ComponentsTop View Water Control Options for Evaporative Cooling EvaporativeEvaporative FreezeTimer ProtectionTrap & Supply Line Configuration with Auto Drain and Fill Auto Drain and Fill with Freeze ProtectionDrain Trap Drain and Overflow Connection Locations Troubleshooting for evaporative module Symptom SolutionEvaporative Cooling Maintenance Electric Preheater Optional accessoriesElectric Heater Application/Operation Post-Heater Control PanelTesting Frost Threshold TemperaturesTimer Frost Control Application/OperationEconomizer Application/Operation Modulating the Wheel Enthalpy Sensor With OverrideVariable Frequency Drives for Blowers Yaskawa Yaskawa E7Variable Frequency Drives for Energy Recovery Wheel Factory Setpoints Modulating Control 0-10 VDC for FAN SpeedWiring Diagram TransformerRotation Sensor Dirty Filter SensorCO2 Sensor Service OutletVapor Tight Lights Optional Accessories Remote Control Panel and Wiring SchematicsRemote Panel Wiring Schematics Indicator Lights powered by the ER UnitHeating/Cooling Switches and Night Setback Switch/Timer Temperature Sensors 1K Ohm RTD Sensors Mounted by FactorySafety Danger Start-Up Checklist for unitSafety Caution Start-Up Checklist for Evaporative Cooler Start-Up ChecklistSpecial Tools Required Economizer Application / Operation section Optional Accessories ChecklistOptional Accessories section Variable Frequency Drives sectionFan Performance Modifications Unit start-upFans Forward Curved Type Fan Belt DrivesVibration Direction of Fan Wheel RotationFan RPM Rotation DirectionAir Seals Drive BeltInside layout of HRE unit Routine maintenance DateFan Belts LubricationDampers Fan MotorsDoor Seal Maintenance External Filter MaintenanceInternal Filter Maintenance BearingsAccess to wheel through Outdoor air filter door Energy Recovery Wheel MaintenanceWheel segment removed Wheel Belt & Pulley Wheel BearingParts List Model HRESummer Operation Sequence of OperationBasic Unit Winter OperationDesign Airflow Pressure Drop Across Energy Recovery WheelTest and Balance Report Measured AirflowTroubleshooting Symptom Possible Cause Corrective ActionWarranty
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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.

The HRE models also showcase advanced aerodynamic design, featuring optimized blade geometry that enhances airflow performance. This design ensures that the fans can deliver consistent and effective air movement even at varying operational conditions. This makes the HRE series suitable for use in a wide range of applications, from commercial kitchens to industrial processes.

Another significant characteristic of the HRE series is its durability. Constructed from high-quality materials, these fans are built to withstand harsh environmental conditions and prolonged usage. The robust casing and corrosion-resistant finishes ensure longevity, reducing the need for frequent repairs or replacements.

In terms of installation and maintenance, the HRE series offers significant advantages. The fans are designed for easy installation with clear mounting instructions. Additionally, maintenance procedures are simplified, allowing for hassle-free access to critical components, which reduces downtime and operating costs.

Technologically, the HRE models incorporate advanced controls and monitoring systems. These systems can offer real-time feedback on operational performance, allowing for proactive maintenance and energy management. Integrated controls can be customized to work with building management systems, providing users with seamless integration and control capabilities.

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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