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Greenheck ERCH - User Manual

Greenheck ERCH
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®
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 instructions could result in personal injury and/or property damage!
Energy Recovery Ventilator with Heating and Cooling 1
®
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,
including environmental. 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 (CE) 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 affect 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. Verify that the power source is compatible with the
equipment.
6. 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.
• If this unit is equipped with optional gas
accessories, turn off gas supply whenever power is
disconnected.
CAUTION
This unit may be equipped with a compressed
refrigerant system. If a leak in the system should
occur, immediately evacuate and ventilate the area.
An EPA Certified Technician must be engaged to
make repairs or corrections. Refrigerant leaks may
also cause bodily harm.
CAUTION
When servicing the unit, the internal components may
be hot enough to cause pain or injury. Allow time for
cooling before servicing.
WARNING
The roof lining contains high voltage wiring. To
prevent electrocution, do not puncture the interior or
exterior panels of the roof.
Document 476054
Model ERCH
Energy Recovery Ventilator
with Heating and Cooling

Table of Contents

Questions and Answers

  • J
    Jenna WilsonAug 26, 2025
    How to troubleshoot a Greenheck Fan when the blower fails to operate?
    • A
      Alexis HunterAug 26, 2025
      If your Greenheck fan's blower isn't working, start by checking the fuse or circuit breaker. If they're blown or open, replace the fuse or reset the breaker, and then check the amps. If that's not the issue, the motor might be overloaded; in that case, reset the VFD and check the amps. Also, check for any On/Off switches, ensure the correct supply voltage, and inspect the control wiring. The motor or capacitor could also be defective, requiring replacement.
  • D
    Donna SmithNov 26, 2025
    What to do if the Greenheck Fan compressor will not run or does not start?
    • G
      Gabriel ReedNov 26, 2025
      If your Greenheck fan's compressor isn't starting or running, begin by checking the disconnect switch and circuit breaker to ensure they are closed. Verify the voltage to the contactor coil, transformer, slave relay, and system, replacing parts as necessary. Also, check for blown fuses or tripped breakers, addressing the cause before replacing the fuse. Low line voltage could be the issue; if it's more than 10% off, correction is needed. The motor thermal protector may be open, requiring a two-hour cool-down period for automatic reset. Inspect the motor for open or short circuits, grounded windings, or burnout, and check the refrigerant. High or low pressure switches could also be defective, needing reset or replacement. Confirm the room thermostat or control is calling for cooling and tha...
  • M
    Matthew JamesNov 23, 2025
    Why is the Greenheck Fan compressor noisy or vibrating?
    • A
      Amanda PerezNov 23, 2025
      If your Greenheck fan's compressor is noisy or vibrating, several factors could be contributing. A refrigerant overcharge can cause this, so check pressures and subcooling. Liquid floodback, possibly due to the thermal expansion valve setting or refrigerant overcharge, can also lead to noise and vibration. Tubing rattle can be a factor; dampen tubing vibration by taping or clamping, and carefully bend tubing away from contact where possible. If it's a scroll compressor, reverse rotation (3-phase) could be the issue; check high and low side pressures during operation and rewire for opposite rotation if needed. A damaged compressor or improper mounting on the unit base can also cause these symptoms, requiring replacement of the compressor or ensuring proper isolation and tight mounting bolts...
  • A
    ann16Nov 22, 2025
    Why is the airflow (cfm) low in my Greenheck Fan?
    • B
      brittanywebbNov 22, 2025
      If your Greenheck fan is experiencing low airflow (CFM), several factors could be contributing. The unit damper might not be fully open, requiring adjustment of the damper linkage or replacement of the damper motor. High system static pressure can also reduce airflow; improve the ductwork to eliminate losses. The blower speed might be too low; check the maximum motor RPM and compare it with catalog data, and verify that external control wiring is in place if required. Additionally, the fan wheels might be operating backwards; for 3-phase systems, refer to the Direction of Fan Wheel Rotation Direction in the Start-Up Components section. A dirty filter, leaks in the ductwork, or obstructions in the fan outlet can also restrict airflow, requiring filter replacement or cleaning, ductwork repai...
  • S
    susan97Sep 18, 2025
    What to do if Greenheck Air Conditioner has an alarm condition in microprocessor controller?
    • C
      Craig KingSep 18, 2025
      If your Greenheck Air Conditioner displays an alarm condition in the microprocessor controller, press the alarm button to see the specific condition or to reset the microprocessor.
  • B
    Brandon LoveSep 17, 2025
    What to do if Greenheck ERCH Air Conditioner has an alarm signifying a faulty sensor in economizer?
    • D
      dnelsonSep 18, 2025
      If your Greenheck Air Conditioner's alarm indicates a faulty sensor in the economizer, verify that all connections to the sensor and controller are secure.
  • N
    Nancy LyonsSep 15, 2025
    What to do if Greenheck ERCH VFD indicates a fault?
    • S
      Samantha HenrySep 15, 2025
      If the Variable Frequency Drive (VFD) on your Greenheck Air Conditioner indicates a fault, such as a voltage spike, perform a hard restart to resolve the issue.
  • M
    Michelle BryanSep 14, 2025
    What causes low discharge pressure in my Greenheck Fan?
    • C
      carrie41Sep 14, 2025
      If your Greenheck fan is experiencing low discharge pressure, several factors could be contributing. An insufficient refrigerant charge is a common cause, so check subcooling and look for leaks, repairing any leaks and adding refrigerant as needed. A defective or improperly adjusted expansion valve can also lead to this issue, so check superheating and adjust the thermal expansion valve. Additionally, low suction pressure itself can result in low discharge pressure; refer to the troubleshooting steps for “low suction pressure.”
  • A
    Anthony WhiteSep 12, 2025
    What causes high discharge pressure in my Greenheck Fan?
    • A
      Annette BrightSep 12, 2025
      If your Greenheck fan is experiencing high discharge pressure, several factors could be contributing. The thermal expansion valve setting might be off, so check the setting and calibrate superheat/subcooling. Too much refrigerant in the system can also cause this, so check subcooling and remove excess refrigerant. Non-condensables in the system can lead to high discharge pressure, so remove them. High load conditions can also be a factor; consider adding more equipment or reducing the load.
  • J
    John VillanuevaSep 7, 2025
    Why is the airflow (cfm) high in my Greenheck Fan?
    • M
      melissa80Sep 8, 2025
      If your Greenheck fan is experiencing high airflow (CFM), several factors could be the cause. The blower fan speed might be too high, so check for the correct maximum fan RPM and decrease it in the VFD if necessary. The absence of filters can also lead to high airflow, so install them. Insufficient static pressure (Ps) can be a factor, so induce Ps into the system ductwork, ensure grilles and access doors are installed, and decrease the fan speed if necessary.

Greenheck ERCH Specifications

General IconGeneral
ModelERCH
CategoryEnergy Recovery Ventilator
TypeEnergy Recovery Core
EfficiencyUp to 80% sensible effectiveness
Voltage Options460/3/60
ApplicationsCommercial buildings, schools, hospitals, offices
ConstructionGalvanized steel casing with insulated panels
Motor TypeEC motor

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