Greenheck Fan ERVe manual Parts List, Sequence of Operation

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Parts List

 

7

 

8

5

 

7

 

 

 

 

4

 

2

3

1.Supply blower

Forward curved fan

Adjustable motor mount for belt tensioning

Adjustable sheaves for speed control

Not depicted on this image

2.Vibrations isolators (quantity 4 per blower)

Neoprene

3.Energy recovery wheel cassette

4.Removable energy recovery wheel segments

5.Standard supply weatherhood with 2-inch aluminum mesh filter

6.Standard exhaust weatherhood with birdscreen Not depicted on this image

7.Standard supply and exhaust air filter racks for 2-inch pleated, 30% efficient filters

8.Electrical control box (standard features)

Single point power

Disconnect interlocked with access door

Motor starters for the supply blower, exhaust blower and energy wheel motors

24 VAC, control circuit with terminal strip

9.Exhaust blower

Forward curved fan

Adjustable motor mount for belt tensioning

Adjustable sheaves for speed control

Not depicted on this image

26Model ERVe Energy Recovery Unit

Sequence of Operation

Basic Unit

The ERVe units are prewired such that when a call for outside air is made (via field supplied 24 VAC control signal wired to unit control center), the supply fan, exhaust fan and energy wheel are energized and optional motorized dampers open. The ERVe is normally slaved (24 volt) to the roof top air handler. When the roof top air handler starts, the auxiliary contactor in the air handler closes to start the ERVe.

Summer Operation

Outdoor air is preconditioned (temperature and moisture levels are decreased) by the transfer of energy from the cooler, drier, exhaust air via the energy recovery wheel. The preconditioned air is typically mixed with return air going back to the air handler for final conditioning.

Economizer Operation: Refer to Economizer Application/Operation section.

Winter Operation

Outdoor air is preconditioned (temperature and moisture levels are increased) by the transfer of energy from the warmer, more humid exhaust air via the energy recovery wheel. The preconditioned air is typically mixed with return air going back to the air handler for final conditioning.

Frost Control Operation: Refer to Frost Control Application/Operation section.

Other Accessories:

Rotation Sensor: Refer to Optional Accessories section

Dirty Filter Sensor: Refer to Optional Accessories section

CO2 Sensor: Refer to Optional Accessories section

VFD on Blowers: VFDs on blowers are often used as part of a demand control ventilation system. This type of system takes advantage of varying occupancy through the use of CO2 sensors to monitor space CO2 levels. If CO2 levels are low in the space, the VFD will operate the blowers at minimum airflow required by code. As the space occupancy increases and CO2 levels increase, the VFD will increase the amount

of fresh outdoor air being brought in to offset the CO2 levels in the space (exhaust airflow is increased proportionally as outdoor airflow increases). As CO2 levels come back down, the airflow will decrease back to minimum requirements.

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Contents Installation, Operation and Maintenance Manual Model ERVe General Safety InformationUnpacking Inspection and Maintenance during StorageReceiving HandlingInstallation Table of ContentsSupplemental Installation Operation and Maintenance Manuals Basic OperationLifting with a Forklift Roof Curb and Rail MountingLifting with a Crane Recommended Roof OpeningDuctwork Connections Curb Outside Dimensions and WeightsRoof Curb Mounting Rail Mounting / Layout Service ClearancesAccess Panel Description and Location Dimensional Data Duct Dimensions Unit SizeElectrical Information Typical Control Center Components Electric Heater Application/OperationExhaust Weatherhood Unit AccessoriesOutdoor Air Weatherhood DampersOptional Accessories Frost Control Application/OperationModulating the Wheel Testing Temperature Sensor with OverrideEconomizer Application/Operation Enthalpy Sensor with OverrideDrive Operation Variable Frequency Drives for Energy Recovery BlowersFactory Set Points 10 VDC Variable Frequency Drives for Energy Recovery WheelEconomizer Signal Source Typical Wiring Diagram TransformerDirty Filter Sensor Service OutletRotation Sensor CO2 SensorDay Timer or On/Off Switch Remote Control Panel and Wiring SchematicsIndicator Lights powered by the ER Unit Dirty Filter Indicator power by othersPressure Sensors analog or digital Temperature Sensors 1K Ohm RTDSensors Mounted by Factory Amp Current Sensors analog or digitalStart-Up Pre Start-Up Checklist check as items areStart-Up Checklist General Start-Up InformationEconomizer Application / Operation section Optional Accessories ChecklistOptional Accessories section Variable Frequency Drives sectionUnit Start-Up Drive Belt Energy Recovery WheelVibration Air SealsFan Belts Routine MaintenanceMaintenance Procedures Lubrication Fan MotorsDoor Seal Maintenance External Filter MaintenanceInternal Filter 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.