Greenheck Fan 473501 manual Check entering air wet bulb conditions

Page 34

Troubleshooting – Refrigeration Circuit

Symptom

Possible Cause

Corrective Action

 

 

 

 

Refrigerant undercharge.

Check pressures and subcooling.

 

 

 

 

Blower running backward.

Interchange any two wires from 3 phase

 

disconnect.

 

 

 

 

 

 

Loose blower, pulley or belts.

Check drive pulley alignment, belt tension.

 

 

 

 

Low entering air temperature (low load condition).

Check entering air wet bulb conditions.

 

 

 

 

Refrigerant leak.

Check system for leaks. Repair leaks and add

Low suction

refrigerant.

 

pressure

 

 

Evaporator dirty or iced up or airflow restricted.

Check defrost system. Clean the coil.

 

 

Check fan operation. Check airflow.

 

 

 

 

 

 

Plugged liquid line filter-drier.

Replace filter-drier.

 

 

 

 

Improper suction pressure regulator setting.

Check setting and correct as required.

 

 

 

 

Expansion valve defective, superheat too high, or

Adjust valve for proper superheat or replace the

 

valve too small.

expansion valve if too small or defective.

 

 

 

 

Moisture in system.

Reclaim refrigerant, check for leaks, recharge.

 

 

 

 

Insufficient refrigerant charge.

Check subcooling, check for leak. Repair leak and

 

add refrigerant.

 

 

 

 

 

 

Defective or improperly adjusted expansion

Check superheating and adjust thermal expansion

Low discharge

valve.

valve.

pressure

 

 

Low suction pressure.

See “Low suction pressure”.

 

 

 

 

 

Faulty condenser temperature controls.

Check condenser controls and reset to obtain

 

desired condensing temperature.

 

 

 

 

 

 

Thermostat location or malfunction.

Check thermostat, check heat anticipator setting.

 

 

 

 

Improper refrigerant charge.

Check subcooling, verify superheat.

 

 

 

 

Defective high or low pressure control.

Check high or low pressure switch.

 

 

 

 

Liquid floodback.

Possible tight bearings.

 

 

 

Compressor

Defective expansion valve.

Check thermal expansion valve and superheat.

 

 

short cycles

Poor air distribution.

Check ductwork for recirculating.

 

 

 

 

 

High discharge pressure.

See “High discharge pressure”.

 

 

 

 

Leaking discharge valves in compressor.

See “High suction pressure”.

 

 

 

 

Low airflow at evaporator(s).

Check blower operation and airstream restrictions.

 

 

 

 

Incorrect unit selection (oversized).

Contact factory.

 

 

 

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

34 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 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

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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