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Greenheck ERV Series - User Manual

Greenheck ERV Series
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Only qualified personnel should install this system.
Personnel should have a clear understanding of these
instructions and should be aware of general safety
precautions. Improper installation can result in electric
shock, possible injury due to coming in contact with
moving parts, as well as other potential hazards. Other
considerations may be required if high winds or seismic
activity are present. If more information is needed,
contact a licensed professional engineer before moving
forward.
1. Follow all local electrical and safety codes, as well
as the National Electrical Code (NEC), the National
Fire Protection Agency (NFPA), where applicable.
Follow the Canadian Electrical Code (CEC) in
Canada.
2. All moving parts must be free to rotate without
striking or rubbing any stationary objects.
3. Unit must be securely and adequately grounded.
4. Do not spin fan wheel faster than maximum
cataloged fan RPM. Adjustments to fan speed
significantly effects motor load. If the fan RPM is
changed, the motor current should be checked to
make sure it is not exceeding the motor nameplate
amps.
5. Do not allow the power cable to kink or come in
contact with oil, grease, hot surfaces or chemicals.
Replace cord immediately if damaged.
6. Verify that the power source is compatible with the
equipment.
7. Never open access doors to the unit while it is
running.
General Safety Information
DANGER
Always disconnect power before working on or near
this equipment. Lock and tag the disconnect switch or
breaker to prevent accidental power up.
CAUTION
When servicing the unit, the internal components may
be hot enough to cause pain or injury. Allow time for
cooling before servicing.
CAUTION
Precaution should be taken in explosive atmospheres.
®
Energy Recovery Ventilator 1
®
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
Document 476412
Model ERV
Energy Recovery Ventilators
Energy Recovery Technical Support
Call 1-800-240-0870

Table of Contents

Questions and Answers

  • S
    Scott BarnesAug 20, 2025
    Why Greenheck ERV energy wheel does NOT turn?
    • L
      Lisa DavisAug 20, 2025
      If the energy wheel in your Greenheck Fan is not turning, consider the following: * The air seals might be too tight. * "Economizer" sensors might be operating. * There may be no power to the wheel motor; ensure the wheel drive is plugged in and verify power is available. * Check the wheel drive belt for looseness or breakage; replace if necessary. * There could be a VFD overload (OL1 on readout); refer to the VFD section and compare the motor amp rating to the setting in the VFD, adjusting accordingly.
  • H
    hthompsonAug 22, 2025
    What to do if Greenheck ERV blower fails to operate?
    • J
      joel46Aug 23, 2025
      If the Greenheck Fan blower isn't working, there might be several reasons: * A fuse might be blown, or a circuit breaker open. In this case, replace the fuse or reset the circuit breaker, and then check the amps. * The motor or capacitor could be defective, requiring replacement. * The motor starter might be overloaded; try resetting it and checking the amps. * There might be an electrical issue, so check the on/off switches and the correct supply voltage. * Lastly, examine the drive for broken or loose belts and tighten any loose pulleys.
  • V
    vbutlerAug 25, 2025
    Why Greenheck ERV Fan motor over amps?
    • M
      Melanie StarkAug 26, 2025
      If your Greenheck Fan motor is over amping, it could be due to several reasons: * The CFM might be too high, so check it and adjust the drives if needed. * Static pressures may be higher or lower than designed; improve ductwork if higher or lower the fan RPM if lower. * Incorrect blower rotation; check and reverse if necessary. * Incorrect motor voltage; check the motor nameplate against the supplied voltage. * Insufficient motor horsepower; see the specifications and catalog for fan curves to determine if the horsepower is sufficient. * Shorted windings in the motor; replace the motor.
  • S
    Scott CollinsAug 28, 2025
    What to do for low airflow (cfm) in Greenheck ERV Fan?
    • J
      jeanwrightAug 28, 2025
      If your Greenheck Fan has low airflow (CFM), here's what you can check: * Make sure the unit damper is fully open. If not, adjust the damper linkage or replace the damper motor. * If the system static pressure is too high, improve the ductwork to eliminate losses. * If the blower speed is too low, check for correct drives and RPM using catalog data. * Ensure the fan wheels are operating in the correct direction. * Check for a dirty filter or energy wheel and follow the cleaning procedures. * Repair any leaks in the ductwork. * Correct or improve ductwork if elbows or other obstructions are blocking the fan outlet. * Adjust the belt tension if there's belt slippage.
  • J
    Jamie CastilloAug 31, 2025
    How to decrease high airflow (cfm) in Greenheck Fan?
    • K
      Kelly BennettAug 31, 2025
      If your Greenheck Fan has high airflow (CFM), check the following: * Ensure the blower fan speed is not too high. Check for the correct fan RPM and decrease the fan speed if necessary. * Verify that all filters are in place. Install filters if they are missing. * Address insufficient static pressure (Ps) by inducing Ps into the system ductwork. Ensure grilles and access doors are installed and decrease fan speed if necessary.
  • G
    Gregory AustinSep 2, 2025
    Why Greenheck ERV Fan motor starters “chatter” or do not pull in?
    • D
      David MillerSep 2, 2025
      If the motor starters in your Greenheck Fan are chattering or not pulling in, it could be due to: * Control power (24 VAC) wiring run being too long. Shorten the wiring run to the mechanical room or install a relay to turn the unit on/off. Consult the factory for relay information, as the resistance should not exceed 0.75 ohms. * Incoming supply power being less than anticipated. Increase the supply power or use a special control transformer sized for the actual supply power.
  • R
    Roy HartSep 5, 2025
    What to do if Greenheck ERV blowers turn off intermittently?
    • C
      Chris PerkinsSep 5, 2025
      If one or both blowers in your Greenheck Fan turn off intermittently and then back on after about 2 minutes, it's possible that the exhaust-only frost control sensors are tripping. To resolve this, adjust the frost temperature sensor set point as needed.
  • C
    Catherine WarnerSep 8, 2025
    Why Greenheck Fan energy wheel runs intermittently?
    • T
      Thomas BrownSep 8, 2025
      If the energy wheel in your Greenheck Fan runs intermittently, it's likely due to wheel motor overloads tripping. This can be caused by rubbing between the wheel and air seals. Recheck the air seals to ensure they are not too tight.
  • B
    Brandon FosterSep 12, 2025
    How to clear alarm from Greenheck Fan display?
    • K
      kaylaadamsSep 12, 2025
      Once you've identified the alarm and resolved the cause (e.g., replaced a faulty sensor) on your Greenheck Fan, you can clear the alarm from the display by following these steps: 1. Navigate to the alarm you want to clear. 2. Press the (enter) button. 3. When 'ERASE?' is displayed, press (enter) again. 4. 'ALARM ERASED' should appear. Press (escape) to complete the action and return to the previous menu.
  • W
    Walter JonesSep 13, 2025
    What to do if alarms signify a faulty sensor in Greenheck Fan?
    • O
      Olivia JohnsonSep 13, 2025
      If alarms on your Greenheck Fan signify a faulty sensor, verify that all connections to the sensor and controller are secure. Press enter twice to clear the alarm. If the issue continues, consult the factory.

Summary

General Safety Information

Unit Overview

Installation

Mounting Options

Illustrates indoor and outdoor mounting configurations for specific ERV models.

Dimensional Data and Weights

Provides physical dimensions and weight specifications for various ERV models.

Service Clearances

Recommended Clearances

Specifies minimum clearances required for maintenance and component access.

ERV-10, 20, 45 Clearance Diagrams

Electrical Information

System Power Wiring

Covers electrical grounding, wiring requirements, and compatibility.

Voltage Supply and Imbalance

Details voltage tolerances and the impact of phase imbalance on motor operation.

Control Wiring

Start-Up Procedures

General Start-Up Information

Provides an overview of the start-up process and its importance.

Pre Start-Up Checklist

Lists critical checks to perform before energizing the unit.

Start-Up Checklist

Outlines the operational checks required during unit commissioning.

Economizer Operation and Settings

Relevant Set Points

Lists and explains key set points for economizer control.

Keypad Operation

Stop and Modulate Wheel Control

Describes procedures for stopping and modulating the energy wheel.

Frost Control and Variable Frequency Drives

Timed Exhaust and Electric Preheat

Details the setup for timed exhaust and electric preheat frost control.

Variable Frequency Drive Wiring

Routine Maintenance

Lubrication and Damper Checks

Covers lubrication requirements and damper operational checks.

Fan Belt and Motor Maintenance

Details inspection and maintenance for fan belts and motors.

Wheel, Filter, and Seal Checks

Outlines checks for blower wheel, fasteners, bearings, filters, and door seals.

ER Wheel Cleaning and Troubleshooting Alarms

Energy Recovery Wheel Cleaning

Economizer Alarm Troubleshooting

Explains how to address and clear economizer-related alarms.

Troubleshooting Airflow Issues

Test and Balance Report

Utilizes TAB reports to diagnose low airflow issues.

Airflow Data Collection

Lists parameters to collect for airflow troubleshooting.

Unit Troubleshooting

Blower and Motor Issues

Addresses issues like blower failure, motor starter problems, and motor over-amperage.

Airflow Problems

Covers troubleshooting for low and high airflow conditions.

Unit Troubleshooting Continued

Intermittent Blower Operation

Diagnoses intermittent blower shutoff and restart issues.

Energy Wheel Operation Issues

Troubleshoots problems with the energy wheel not turning or running intermittently.

Noise and Vibration Issues

Identifies causes and corrective actions for excessive noise and vibration.

Greenheck ERV Series Specifications

General IconGeneral
CategoryEnergy Recovery Ventilator (ERV)
Cabinet ConstructionGalvanized Steel with Optional Insulation
Voltage Options115V, 208V, 230V, 460V
Power SupplySingle or Three Phase
CertificationsAHRI
FiltersMERV

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