Greenheck Fan 473501 manual Resistance

Page 30

Troubleshooting – Unit

Symptom

Possible Cause

Corrective Action

 

 

 

 

CFM too high.

Check cfm and adjust drives if needed.

 

 

 

 

Static pressures are higher or lower than design.

If higher, ductwork should be improved.

 

If lower, fan rpm should be lower.

 

 

 

 

 

Motor over amps

Blower rotation is incorrect.

Check rotation and reverse if necessary.

 

 

Motor voltage incorrect.

Check motor nameplate versus supplied voltage.

 

 

 

 

 

Motor horsepower too low.

See specifications and catalog for fan curves to

 

determine if horsepower is sufficient.

 

 

 

 

 

 

Shorted windings in motor.

Replace motor.

 

 

 

 

Unit damper not fully open.

Adjust damper linkage or replace damper motor.

 

 

 

 

System static pressure too high.

Improve ductwork to eliminate losses using good

 

duct practices.

 

 

 

 

 

 

Blower speed too low.

Check for correct drives and rpm with catalog data.

 

 

 

 

Fan wheels are operating backwards.

For 3-phase, direction can be reversed by

 

interchanging any two of the three electrical leads.

Low airflow (cfm)

 

 

 

Dirty filter.

Follow cleaning procedures in Routine Maintenance

 

 

section.

 

 

 

 

 

 

Leaks in ductwork.

Repair.

 

 

 

 

Elbows or other obstructions may be obstructing

Correct or improve ductwork.

 

fan outlet.

 

 

 

 

 

 

Belt slippage.

Adjust belt tension.

 

 

 

 

Blower fan speed too high.

Check for correct fan rpm. Decrease fan speed if

 

necessary.

 

 

 

 

 

High airflow (cfm)

Filter(s) not in place.

Install filters.

 

 

 

Insufficient static pressure (Ps) (airflow

Induce Ps into system ductwork. Make sure grilles

 

and access doors are installed. Decrease fan speed if

 

resistance).

 

necessary.

 

 

 

 

 

 

Fan wheel rubbing on inlet.

Adjust wheel and/or inlet cone. Tighten wheel hub or

 

bearing collars on shaft.

 

 

 

 

 

 

Bearings.

Replace defective bearing(s). Lubricate bearings.

 

Tighten collars and fasteners.

 

 

 

 

 

 

Wheel out of balance.

Replace or rebalance.

 

 

 

 

Loose wheel on shaft.

Tighten wheel setscrew.

 

 

 

 

Loose motor or blower sheave.

Tighten sheave setscrew.

 

 

 

 

Belts too loose.

Adjust belt tension after 24 hours of operation.

Excessive noise

 

 

Belts too tight.

Loosen to maintain a 3/8 inch deflection per foot of

or vibration

span between sheaves.

 

 

 

 

 

 

Worn belt.

Replace.

 

 

 

 

Motor base or blower loose.

Tighten mounting bolts.

 

 

 

 

Buildup of material on wheel.

Clean wheel and housing.

 

 

 

 

Bearing and drive misaligned.

Realign.

 

 

 

 

 

Make sure ductwork is supported properly. Make

 

Noise being transmitted by duct.

sure ductwork metal thickness is sized for proper

 

stiffness. Check duct size at discharge to ensure that

 

 

 

 

air velocities are not too high.

 

 

 

Always have a completed Pre Start-Up Checklist and Unit Start-Up Checklist prior to requesting parts or service information.

30 Model 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 varyInstallation Dimensional DataUnit Weights and Recommended Roof Opening Service Clearances ERCH-HP 20 ERCH-HPLifting Lifting LugsRoof Curb Mounting Curb Outside Dimensions and Weights Install DuctworkSet the Unit Lift Ductwork Connections Rail Mounting / LayoutExhaust Weatherhood Start-Up Unit Pre-Start-Up Checklist Start-Up ProcedureVoltage Imbalance Unit Start-Up Checklist Electrical Information Discharge Air Temperature Sensor Plumbing / Piping OverviewCondensate Drain Trap Indicator Lights powered by the ER Unit Optional Remote Control PanelWiring Schematics Day Timer or On/Off SwitchOptional Control Center Components Timer Electrical ControlsOptional Frost Control Phase Monitor Optional EconomizerVariable Frequency Drive VFD Optional Rotation Sensor Dirty Filter SensorSequence of Operation Adjust the Air SealsEnergy Wheel Start-UpEnergy Wheel Maintenance Energy Wheel Troubleshooting Factory-Installed Heat Pump System ComponentsHeat Pump Overview Heat Pump Controls Refrigeration System Schematic Typical Operating Conditions Unit Protection Module UPM Fault Indications Lockout ResetIntelligent Reset Troubleshooting Controller Alarms DDC ControllerFX05 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 Motors Fan Wheel and FastenersFan Bearings Internal Filter Maintenance External Filter MaintenanceCoil Maintenance Maintenance Log Warranty

473501 specifications

Greenheck Fan 473501 is a significant player in the world of ventilation solutions, specifically designed to meet the increasing demands for efficiency and effectiveness in air movement. This commercial-grade fan is particularly noted for its high performance and reliability, making it a top choice for various applications, ranging from industrial settings to larger commercial spaces.

One of the main features of the Greenheck 473501 is its energy-efficient design. It is engineered to minimize energy consumption while maximizing airflow, allowing users to achieve optimal performance without incurring high utility bills. The fan is equipped with a powerful motor that not only ensures consistent airflow but also contributes to its overall longevity and durability.

The fan boasts an impressive air performance rating, which is crucial for environments that require precise temperature and humidity control. With adjustable airflow settings, users can customize the fan’s operation to suit specific needs, whether that means circulating air in a warehouse or exhaust in a manufacturing facility.

Another standout characteristic is the fan's robust construction. Built with corrosion-resistant materials, the Greenheck 473501 is ideal for use in harsh environments, where exposure to moisture and other elements could compromise lesser fans. The design also incorporates noise-reducing technologies, making it suitable for settings where quiet operation is essential, such as schools, hospitals, and office buildings.

In terms of installation, the Greenheck 473501 is designed for versatility. It can be easily integrated into various ventilation systems, whether for new constructions or upgrades to existing infrastructure. Its compact footprint allows for convenient placement without sacrificing performance.

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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