Greenheck Fan Greenheck ERV Manual: Understanding Variable Frequency Drives for Energy Recovery Units
Page 16

Variable Frequency Drives for Energy Recovery Blowers

Optional factory installed, wired, and programmed variable frequency drives (VFDs) may have been provided for modulating or multi-speed control of the blowers. One VFD is provided for each blower (supply air and exhaust). The VFD’s provided are either Yaskawa model V1000 or J1000. Refer to the tables in this section for factory settings and field wiring requirements. Refer to the unit control center for unit specific wiring diagram (an example wiring diagram has been provided in this manual for reference). When making adjustments outside of the factory set points, refer to Yaskawa VFD instruction manual, which can be found online at www.drives.com. For technical support, contact Yaskawa direct at 1-800-927-5292.

R+ R- S+ S- IG

P1 P2 PC A1 A2 +V AC AM AC MP

S1 S2 S3 S4 S5 S6 S7 HC SC H1 RP MA MB MC

V1000

OPTION 1 - 0-10 VDC CONTROL

USER TO PROVIDE ISOLATION AS REQUIRED

A1

AC

0-10 VDC CONTROL SIGNAL (BY OTHERS)

 

 

 

 

WIRED TO A1 (+) AND AC (COMMON)

 

 

 

 

 

 

 

 

0 VDC=30 Hz

 

 

 

 

 

 

 

 

10 VDC=60 Hz

 

 

 

 

 

 

 

 

 

FOR ONE 0-10 SIGNAL, WIRE TO DRIVES IN PARALLEL SEE VFD INSTALLATION MANUAL FOR MORE DETAIL

FOR CONTINUOUS 60Hz OPERATION JUMPER TERMINALS A1 AND +V.

OPTION 2 - MULTI SPEED CONTROL

USER TO PROVIDE CONTACTS AND ISOLATION

AS REQUIRED

S4

S5

SC

NEITHER S4 OR S5 CONTACT CLOSED

DRIVE SPEED = 60 Hz.

 

 

 

 

 

 

S4 TO SC CONTACT CLOSED (BY OTHERS)

 

 

 

DRIVE SPEED = 40 Hz.

 

 

 

S5 TO SC CONTACT CLOSED (BY OTHERS)

 

 

 

DRIVE SPEED = 30 Hz.

SEE VFD INSTALLATION MANUAL FOR MORE DETAIL

TO CHANGE THE FACTORY SET Hz CHANGE THE FOLLOWING PARAMETERS.

PARAMETER n01 CHANGE TO 1

PARAMETER n21 FOR NEW 60Hz SETTING

PARAMETER n22 FOR NEW 40Hz SETTING

PARAMETER n23 FOR NEW 30Hz SETTING

PARAMETER n01 CHANGE TO 0

16Model ERV Energy Recovery Unit

S1 S2 S3 S4 S5 SC A1 +V AC AM AC

MA MB MC

J1000

 

Factory Set Points

Variable Frequency Drives (VFDs) for the blowers are factory setup to operate in one of the three following modes:

Modulating: 0-10 VDC signal wired in the field by others varies the speed of the blower between 30 and 60Hz

Multi-speed:Digital contact closures by others command the VFD to run at multiple speed settings:

•SC to S4 - Drive runs at 40Hz

•SC to S5 - Drive runs at 30Hz

CO2 Sensor: A digital contact closure from an optional factory provided CO2 sensor sends the VFD to high or low speed depending on CO2 ppm levels at the sensor.

The terminal locations for Modulating (option 1) and Multi-speed (option 2) are shown on the left. Most of the set points in the VFDs are Yaskawa factory defaults. However, a few set points are changed at Greenheck and are shown in the tables on the next page. These settings are based on the VFD mode selected.

To gain access to change set points on the V1000 and J1000 drives, parameter A1-01 needs to be set at “2”. To prevent access or tampering with drive settings on either drive, change parameter A1-01 to “0”.

Drive Operation

SC to S1 contact for On/Off

A1 (0-10 VDC) referenced to AC. Can use +15 VDC from +V

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Contents General Safety Information Models ERV-251 ERV-361 ERV-521 ERV-581 ERV-522 ERV-582Inspection and Maintenance during Storage ReceivingUnpacking HandlingTable of Contents Supplemental Installation Operation and Maintenance ManualsInstallation Basic OperationLifting Recommended Roof OpeningCurb Outside Dimensions and Weights Curb Outside DimensionsRoof Curb Mounting Ductwork ConnectionsRail Mounting / Layout Service Clearances ERV-251, ERV-361, ERV-521, ERV-581 ERV-522, ERV-582Arrangement a Arrangement B, C or DField Control Wiring Length/Gauge Electrical InformationUnit Accessories Access Panel Description and Location ERV-251, ERV-361, ERV-521, ERV-581 ERV-522Outdoor Air Dimensional Data ERV-522 Unit Size Exterior Dimensions Arrangement C Arrangement DFrost Threshold Temperatures Indoor RH @ 70F Optional AccessoriesFrost Control Application/Operation Testing Temperature Sensor with Override Economizer Application/OperationModulating the Wheel Enthalpy Sensor with OverrideFactory Set Points Variable Frequency Drives for Energy Recovery BlowersDrive Operation Variable Frequency Drives for Energy Recovery Wheel Resetting the drive to factory defaultsEconomizer Signal Source 10 VDCTypical 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 Hand/Off/Auto SwitchTemperature 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 Door Seal MaintenanceEnergy Recovery Wheel Maintenance Internal Filter MaintenanceRemoving the Energy Recovery Wheel in ERV-251 Accessing the Energy Recovery Wheel in Models ERV-522Wheel segment removed Energy Recovery Wheel Belt Cleaning the Energy Recovery WheelEnergy Recovery Wheel Bearing Parts List Inside layout of ERV-361 Inside layout of ERV-522Other Accessories Sequence of OperationBasic Unit Summer OperationTroubleshooting Airflow Troubleshooting Unit Symptom Possible Cause Corrective ActionTroubleshooting Unit Maintenance Log Warranty

ERV-361, ERV-251, ERV-521, ERV-582, ERV-522 specifications

Greenheck Fan has established itself as a leader in the design and manufacturing of high-performance ventilation systems, including its innovative energy recovery ventilators (ERVs). Among their popular models are the ERV-581, ERV-522, ERV-582, ERV-521, and ERV-251, each designed to enhance indoor air quality while optimizing energy efficiency.

The ERV-581 offers comprehensive ventilation solutions for commercial buildings, equipped with advanced heat recovery technology. This model features a robust, compact design, allowing for easy installation in limited spaces. Its efficient energy recovery capabilities transfer heat and moisture between incoming and outgoing airstreams, leading to significant reductions in heating and cooling costs. The ERV-581 also includes a user-friendly control panel for simplified operation.

Next in line, the ERV-522 is engineered for larger spaces, balancing higher airflow rates with enhanced energy recovery performance. This model is particularly beneficial for schools and office buildings, where maintaining fresh air quality is paramount. The ERV-522 employs a two-stage filtration system, ensuring that airborne pollutants are effectively captured before being circulated back into the environment. Its resilient construction further ensures longevity and durability in demanding applications.

The ERV-582 enhances the lineup with its dual-function capability, serving both as an energy recovery ventilator and a dehumidification system. This flexibility makes it an ideal choice for climates with high humidity levels, where moisture control is essential. The ERV-582 incorporates Greenheck’s patented technology for optimal performance under varying temperature and humidity conditions, making it a versatile solution for diverse environments.

The ERV-521 stands out with its eco-friendly design, featuring recyclable components that align with sustainable building practices. This model is particularly favored in LEED-certified projects, where energy efficiency and minimal environmental impact are essential. The ERV-521 also includes an intelligent control system that adjusts airflow rates based on occupancy levels, ensuring optimal energy usage.

Finally, the ERV-251 is a compact, energy-efficient model suited for residential installations. It is designed to fit seamlessly into homes, providing essential ventilation while reducing energy consumption. The user-friendly interface allows homeowners to monitor and adjust settings easily, making the ERV-251 a popular choice for those looking to improve indoor air quality without compromising on comfort.

Together, these Greenheck ERV models exemplify cutting-edge technologies and engineering, paving the way for healthier indoor environments while promoting energy conservation. Each unit is tailored to meet specific application needs, making them invaluable assets for any ventilation strategy.
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