Greenheck Fan 473501 manual Energy Wheel, Sequence of Operation, Start-Up, Drive Belt

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Energy Wheel

Start-Up

If selected, the energy wheel is installed in the unit’s airstream with one half of the wheel in the intake airstream and one half in the exhaust airstream. Air leakage between the two airstreams has to be kept to a minimum and the wheel has air seals that must be adjusted for that purpose. The seals must be adjusted at time of start-up. The wheel can be accessed through the door labeled Energy Wheel Access.

Bearing Support

Adjustable

Air Seals

 

 

 

 

 

 

 

Label showing

 

 

 

 

 

 

 

 

 

 

 

 

 

cassette serial number

 

 

 

 

 

 

 

 

 

 

 

 

 

and date code

Drive Belt

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drive Pulley

 

 

 

 

 

 

 

 

 

 

 

Drive Belt

 

 

Inspect the drive belt. Make

 

 

sure the belt rides smoothly

 

 

in the pulley and around the

 

 

outside of the wheel. Note

 

 

the directional arrow and

 

 

data information shown in the

 

 

image.

Motor Pulley and Belt

 

 

 

 

 

 

Adjust the Air Seals

The first step in wheel seal adjustment is to make sure the unit power supply is locked out. Disconnect the wiring to the wheel module and pull the wheel cassette out of the cabinet on its tracks. Large cassettes are not removable. Then slowly rotate the wheel by hand to make sure there is no binding or

misalignment. The wheel should rotate smoothly and should not bind.

should be a slight tug on the paper. Tighten the screws, repeat the steps on the other set of seals.

Push the wheel cassette back into the unit and plug in the power connector. Turn the main power supply back on and then observe the operation of the wheel by opening the wheel access door slightly. Remove filters if necessary to observe the wheel.

Sequence of Operation

Optional Economizer - The economizer will be locked out when: the outside air is <40°F (- 2°F hysteresis, adjustable); the unit is operating in dehumidification mode; or there is a call for heating.

•Stop Wheel: When economizer mode is enabled and there is a signal for cooling, the wheel will stop rotating to allow free cooling.

•Modulate Wheel: When economizer mode is enabled and there is a signal for cooling, the wheel VFD modulates wheel speed to maintain the discharge temperature set point.

Optional Frost Control - The DDC controller will output a signal when wheel frosting is occurring which is determined by a temperature set point (OA <5°F – 2°F hysterisis, adjustable) and wheel pressure drop increase.

•Preheat: When frosting is occurring, the preheater is energized to defrost the wheel. Once the pressure drop decreases below the set point, the preheater is de-energized.

•Timed Exhaust: When frosting is occurring, the supply blower is cycled off. The exhaust blower shall continue to run, allowing the warm exhaust air to defrost the wheel. After the 10 minute cycle, the supply fan are re-energized to continue normal operation.

Alarms Indication - DDC shall have one digital output for remote indication of an alarm condition.

• Wheel Rotation Alarm: Monitors wheel rotation,

There is a perimeter seal located around the outside of the wheel and a diameter seal across the face of the wheel on both sides. Check to make sure that all air seals are secure and in good condition.

Adjust the air seals by loosening all the air seal retaining screws on the bearing support (see image for reference). Using a piece of paper as a feeler gauge, adjust the seals so they almost touch the face of the wheel while tugging slightly on the paper. When the wheel is rotated, there

Retaining

Screws

Bearing Support Bar

showing air seal assembly

and sends a signal to controller (after a 15 second

time delay with no rotation) that signals the DDC to

activate an alarm.

22Model ERCH-HP Energy Recovery Unit

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Contents General Safety Information Model ERCH-HPUnpacking Inspection and Maintenance during StorageReceiving HandlingTable of Contents Product Overview Models and CapacitiesSubassemblies CoilsHeat Pump Module Location of components in the module will varyDimensional Data InstallationUnit Weights and Recommended Roof Opening Service Clearances ERCH-HP 20 ERCH-HPLifting Lifting LugsInstall Ductwork Roof Curb Mounting Curb Outside Dimensions and WeightsSet the Unit Lift Rail Mounting / Layout Ductwork ConnectionsExhaust Weatherhood Start-Up Unit Start-Up Procedure Pre-Start-Up ChecklistVoltage Imbalance Unit Start-Up Checklist Electrical Information Plumbing / Piping Overview Discharge Air Temperature SensorCondensate Drain Trap Indicator Lights powered by the ER Unit Optional Remote Control PanelWiring Schematics Day Timer or On/Off SwitchOptional Control Center Components Electrical Controls TimerOptional Frost Control Optional Economizer Phase MonitorVariable Frequency Drive VFD Optional Rotation Sensor Dirty Filter SensorSequence of Operation Adjust the Air SealsEnergy Wheel Start-UpEnergy Wheel Maintenance Factory-Installed Heat Pump System Components Energy Wheel TroubleshootingHeat Pump Overview Heat Pump Controls Refrigeration System Schematic Typical Operating Conditions Lockout Reset Unit Protection Module UPM Fault IndicationsIntelligent Reset DDC Controller Troubleshooting Controller AlarmsFX05 Furnace Controller Design Airflow Troubleshooting AirflowTroubleshooting Unit Measured AirflowResistance Troubleshooting Refrigeration Circuit Troubleshooting NoteTwo hours. Recheck for open circuit Check bulb for contact Check entering air wet bulb conditions Worn oil pump Replace the oil pump Maintenance Procedures Lubrication Routine MaintenanceMaintenance Frequency DampersFan Wheel and Fasteners Fan MotorsFan Bearings External Filter Maintenance Internal Filter MaintenanceCoil Maintenance Maintenance Log Warranty

473501 specifications

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Furthermore, Greenheck offers extensive support and resources for this model, ensuring users have access to the information necessary for optimal operation, maintenance, and any potential troubleshooting.

Overall, the Greenheck Fan 473501 represents a harmonious blend of efficiency, durability, and flexibility, making it an ideal choice for those seeking a high-quality ventilation solution that meets contemporary environmental standards while delivering reliable performance across diverse applications.
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