Greenheck Fan ERVe manual Troubleshooting Unit, Symptom Possible Cause Corrective Action

Page 28

Troubleshooting – Unit

Symptom

Possible Cause

Corrective Action

 

 

 

 

Blown fuse or open circuit breaker.

Replace fuse or reset circuit breaker and check

 

amps.

 

 

 

 

 

 

Defective motor or capacitor.

Replace.

Blower fails to

 

 

Motor starter overloaded.

Reset starter and check amps.

operate

 

 

Electrical.

Check for On/Off switches. Check for correct

 

 

supply voltage.

 

 

 

 

 

 

Drive.

Check for broken or loose belts. Tighten loose

 

pulleys.

 

 

 

 

 

 

Control power (24 VAC) wiring run is too long

Shorten wiring run to mechanical room or

 

install a relay which will turn unit on/off. Consult

Motor starters

(resistance should not exceed 0.75 ohms).

Factory for relay information.

 

“chatter” or

 

 

Incoming supply power is less than anticipated.

Need to increase supply power or use a special

do not pull in

 

Voltage supplied to starter coil must be within

control transformer which is sized for the actual

 

+10% / -15% of nominal voltage stated on the coil.

supply power.

 

 

 

 

CFM too high.

Check cfm and adjust drives if needed.

 

 

 

 

Static pressures are higher or lower than

If higher, ductwork should be improved.

 

design.

If lower, fan rpm should be lower.

 

 

 

 

Blower rotation is incorrect.

Check rotation and reverse if necessary.

Motor over amps

 

 

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, see Direction of Fan Wheel

Low airflow (cfm)

Rotation under Unit Start-Up section.

 

 

 

 

Dirty filter or energy wheel.

Follow cleaning procedures in Routine

 

Maintenance section.

 

 

 

 

 

 

Leaks in ductwork.

Repair.

 

 

 

 

Elbows or other obstructions may be

Correct or improve ductwork.

 

obstructing 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

 

resistance).

 

fan speed if necessary.

 

 

 

 

 

Always have a completed Pre Start-Up Checklist, unit Start-Up Checklist, and Optional Accessories Checklist prior to requesting parts or service information.

28 Model ERVe Energy Recovery Unit

Image 28
Contents Installation, Operation and Maintenance Manual Model ERVe General Safety InformationInspection and Maintenance during Storage ReceivingUnpacking HandlingTable of Contents Supplemental Installation Operation and Maintenance ManualsInstallation Basic OperationRoof Curb and Rail Mounting Lifting with a CraneLifting with a Forklift Recommended Roof OpeningRoof Curb Mounting Curb Outside Dimensions and WeightsDuctwork Connections Access Panel Description and Location Service ClearancesRail Mounting / Layout Dimensional Data Duct Dimensions Unit SizeElectrical Information Typical Control Center Components Electric Heater Application/OperationUnit Accessories Outdoor Air WeatherhoodExhaust Weatherhood DampersOptional Accessories Frost Control Application/OperationTesting Temperature Sensor with Override Economizer Application/OperationModulating the Wheel Enthalpy Sensor with OverrideFactory Set Points Variable Frequency Drives for Energy Recovery BlowersDrive Operation Economizer Signal Source Variable Frequency Drives for Energy Recovery Wheel10 VDC Typical Wiring Diagram TransformerService Outlet Rotation SensorDirty Filter Sensor CO2 SensorRemote Control Panel and Wiring Schematics Indicator Lights powered by the ER UnitDay Timer or On/Off Switch Dirty Filter Indicator power by othersTemperature Sensors 1K Ohm RTD Sensors Mounted by FactoryPressure Sensors analog or digital Amp Current Sensors analog or digitalPre Start-Up Checklist check as items are Start-Up ChecklistStart-Up General Start-Up InformationOptional Accessories Checklist Optional Accessories sectionEconomizer Application / Operation section Variable Frequency Drives sectionUnit Start-Up Energy Recovery Wheel VibrationDrive Belt Air SealsRoutine Maintenance Maintenance Procedures LubricationFan Belts Fan MotorsExternal Filter Maintenance Internal Filter MaintenanceDoor Seal Maintenance Fan Wheel & FastenersEnergy Recovery Wheel Maintenance Parts List Sequence of OperationTroubleshooting Airflow Troubleshooting Unit Symptom Possible Cause Corrective ActionTroubleshooting Unit Maintenance Log Model ERVe Energy Recovery Unit Warranty

ERVe specifications

The Greenheck Fan ERVe series stands at the forefront of energy-efficient ventilation solutions, specifically designed to meet the growing demands for energy conservation and enhanced indoor air quality in commercial buildings. As part of Greenheck's commitment to innovation, the ERVe series offers a variety of models tailored to diverse applications, including schools, hospitals, and office buildings.

One of the key features of the ERVe series is its advanced energy recovery technology. The ERVe utilizes a heat recovery wheel that efficiently transfers heat and moisture between the exhaust and incoming airstreams. This process significantly reduces heating and cooling loads on HVAC systems, promoting energy savings and improving overall system efficiency. By reclaiming energy that would otherwise be wasted, the ERVe ensures that buildings not only conform to energy codes but also contribute to sustainability goals.

The ERVe series is designed with versatility in mind. It offers multiple configurations, including vertical and horizontal orientations, which makes it adaptable to various installation environments. Additionally, the unit can be equipped with a range of options such as pre-filters, post-filters, and variable speed drive motors, allowing for customization based on specific application needs. This adaptability ensures that the ERVe can meet the specific air quality requirements of different spaces while maintaining optimal airflow.

Another significant characteristic of the ERVe series is its low noise operation. The design incorporates advanced acoustical features, including sound attenuators and insulated panels, which minimize sound transmission and enhance occupant comfort. As noise control becomes increasingly important in settings like educational institutions and healthcare facilities, the ERVe series excels in providing a peaceful indoor environment.

Moreover, the ERVe series is engineered with durability in mind. Constructed from high-quality materials, the units are built to withstand the rigors of continuous operation. The robust design not only extends the service life of the equipment but also reduces maintenance requirements, leading to lower overall operational costs.

In terms of control and monitoring, the ERVe series is compatible with various building management systems, allowing for integration into sophisticated HVAC controls. This feature enables real-time data tracking and optimization, enhancing the efficiency of indoor climate management.

Overall, the Greenheck Fan ERVe series represents a significant advancement in ventilation technology, combining energy efficiency, customizable features, low noise operation, and durability. These characteristics ensure that the ERVe is a reliable choice for modern commercial buildings striving for improved air quality and reduced energy consumption.