Greenheck Fan 473501 manual Check bulb for contact

Page 33

Troubleshooting – Refrigeration Circuit

Symptom

Possible Cause

Corrective Action

 

 

 

 

Refrigerant overcharge.

Check pressures and subcooling.

 

 

 

 

Liquid floodback.

Check thermal expansion valve setting. Check for

 

refrigerant overcharge.

 

 

 

 

 

 

 

Dampen tubing vibration by taping or clamping.

Compressor noisy

Tubing rattle.

Carefully bend tubing away from contact where

or vibrating

 

possible.

 

Scroll compressor rotating in reverse (3 phase).

Rewire for opposite rotation.

 

 

 

 

Worn or damaged compressor.

Replace the compressor.

 

 

 

 

Improper mounting on unit base.

Check that compressor is properly isolated.

 

 

 

 

Excessive load on evaporator coil.

Check for high entering wet bulb temperature.

 

Check for excessive air.

 

 

 

 

 

 

 

Check head pressure, check thermal expansion

 

Compressor is unloaded.

valve if not functioning properly, check pressure

 

 

drop across filter drier.

 

 

 

 

 

Check the thermal expansion valve, ensure bulb is

 

 

insulated.

 

 

Check superheat. If superheat is high, then valve is

High suction

Expansion valve not secured to suction line.

out of control and pegged wide open.

pressure

 

• Check bulb for contact.

 

 

• Adjust valve for superheat.

 

 

• Replace valve powerhead or valve.

 

 

 

 

Thermostatic expansion valve pressure limit

Check bulb location and clamping. Adjust

 

feature incorrect or inoperative. Overfeeding.

superheat. Replace expansion valve power head.

 

 

 

 

Room load too large.

Reduce the load or add more equipment.

 

 

 

 

Overcharged.

Check pressures and subcooling.

 

 

 

 

Thermal expansion valve setting.

Check thermal expansion setting and calibrate

 

superheat.

 

 

 

 

 

 

Air inlet to condenser dirty or obstructed.

Check for proper clearances and possible air

 

recirculating.

 

 

 

 

 

 

Condenser fan motor defective.

Check condenser fan motor.

 

 

 

 

Too much refrigerant.

Remove excess refrigerant.

High discharge

 

 

Non-condensable in system.

Remove non-condensable from system.

pressure

 

 

 

 

Dirty condenser coil.

Clean condenser coil.

 

 

 

 

Condenser fan not running or running

Check electrical circuit and fuse. Check fan cycling

 

backwards.

controls.

 

 

 

 

Discharge service valve partially closed.

Open valve.

 

 

 

 

High load conditions.

Add more equipment or reduce load.

 

 

 

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

Model ERCH-HP Energy Recovery Unit 33

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Contents Model ERCH-HP General Safety InformationReceiving Inspection and Maintenance during StorageUnpacking HandlingTable of Contents Models and Capacities Product OverviewCoils SubassembliesLocation of components in the module will vary Heat Pump ModuleInstallation Dimensional DataUnit Weights and Recommended Roof Opening ERCH-HP 20 ERCH-HP Service ClearancesLifting Lugs LiftingRoof 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 Wiring Schematics Optional Remote Control PanelIndicator Lights powered by the ER Unit Day Timer or On/Off SwitchOptional Control Center Components Timer Electrical ControlsOptional Frost Control Phase Monitor Optional EconomizerVariable Frequency Drive VFD Dirty Filter Sensor Optional Rotation SensorEnergy Wheel Adjust the Air SealsSequence of Operation 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 Troubleshooting Unit Troubleshooting AirflowDesign Airflow Measured AirflowResistance Troubleshooting Note Troubleshooting Refrigeration CircuitTwo hours. Recheck for open circuit Check bulb for contact Check entering air wet bulb conditions Worn oil pump Replace the oil pump Maintenance Frequency Routine MaintenanceMaintenance Procedures Lubrication 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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