Table of Contents
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Installation, Operation and Maintenance Manual
Please read and save these instructions. 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! Retain instructions for future reference.
Models: ERV-251
ERV-361
ERV-521
ERV-581
ERV-522
ERV-582
General Safety Information
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.
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 Ventilators
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.
Document #455924
Energy Recovery Ventilator
1
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Table of Contents
Troubleshooting
Related Manuals for Greenheck ERV-251ERV-361
Summary of Contents for Greenheck ERV-251ERV-361
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Page 1: General Safety Information
Document #455924 Energy Recovery Ventilators ® Installation, Operation and Maintenance Manual Please read and save these instructions. 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! Retain instructions for future reference. - Page 2 Traffic Department. If damaged upon arrival, file claim with carrier. Any physical damage to the unit after acceptance is not the responsibility of Greenheck Fan Corporation. Unpacking Verify that all required parts and the correct quantity of each item have been received.
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Page 3: Table Of Contents
Table of Contents Basic Operation Basic Operation ....3 The ERV brings in fresh, outdoor air and removes Installation stale, exhaust air. Prior to discharging the exhaust Supplemental Installation, Operation and air, the energy recovery wheel transfers energy from Maintenance Manuals . -
Page 4: Lifting
Lifting Recommended Roof Opening 1. Before lifting, be sure that all shipping material has been removed from unit. 2. To assist in determining rigging requirements, weights are shown below. EXHAUST 3. Unit must be lifted by all lifting lugs provided on INTAKE base structure. -
Page 5: Roof Curb Mounting
Roof Curb Mounting Curb Outside Dimensions - Roof curb details including duct location dimensions, are available on ERV-522 & 582 Roof Curb Assembly Base Side of Unit Instructions, Part #460988. Rooftop units require curbs to be mounted first. The duct connections must be located so they will be clear of structural members of the building. -
Page 6: Rail Mounting / Layout
Rail Mounting / Layout others). intake opening on the ERV unit. Avoid area dimensioned “B” below. ERV-251 ERV-361 ERV-522 ERV-521 ERV-582 ERV-581 Isometric view of ERV on rails Isometric view of ERV on rails OUTDOOR OUTDOOR AIR INTAKE HOOD INTAKE OUTDOOR AIR SIDE HOOD SUPPLY/EXHAUST... -
Page 7: Service Clearances
Service Clearances ERV-251, 361, 521 and 581 units require minimum clearances to perform routine maintenance, such as filter replacement, energy wheel cassette inspection, and fan belt adjustment. Blower and motor assemblies, energy recovery wheel cassette and filter sections are always provided with a service door or panel for proper component access. -
Page 8: Electrical Information
Electrical Information WARNING The unit must be electrically grounded in accordance To prevent injury or death due to electrocution or with the current National Electrical Code, ANSI/NFPA contact with moving parts, lock disconnect switch 70. In Canada, use current CSA Standard C22.1, open. -
Page 9: Control Center Components
Typical Control Center Components Electric Heater Application/Operation Factory installed electric heaters can be provided for 1. Main Disconnect (non-fusible, lockable) preheat frost control. An electric preheater warms 2. Motor Starter – Exhaust Air Fan the outdoor air prior to the energy recovery wheel 3. -
Page 10: Access Panel Description And Location
Access Panel Description and Location ERV-251, ERV-361, ERV-521, ERV-581 ERV-522 Outdoor Air Interior Discharge Outdoor Air Discharge Exhaust Air Inlet Exhaust Air Inlet Outdoor Air Outdoor Air Inlet Inlet Exhaust Air Discharge Exhaust Air Discharge Arrangement A Arrangement A Rooftop Intake Hood Exhaust Hood... - Page 11 ERV-582 Outdoor Air Discharge Exhaust Air Inlet Outdoor Air Inlet Exhaust Air Discharge Arrangement A Exhaust Hood Intake Hood Arrangement B, C or D Exhaust blower and motor Electric control center Main disconnect Supply blower and motor Exhaust air intake damper Energy wheel cassette Internal filters Frost control...
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Page 12: Dimensional Data
Dimensional Data ERV-251, 361, 521 and 581 Exterior Dimensions Unit Opening Dimensions Unit Size Unit Size ERV-251 ERV-251 ⁄ ERV-361 ERV-361 ⁄ ⁄ ERV-521 ERV-521 ⁄ ⁄ ERV-581 ERV-581 ⁄ All dimensions are in inches. All dimensions are in inches. Outdoor Air Discharge Outdoor Air Discharge L x K... - Page 13 ERV-522 and 582 Exterior Dimensions Unit Opening Dimensions Unit Size Unit Size ERV-522S ERV-522S ⁄ ERV-522H ERV-522H ERV-582H ⁄ ⁄ ERV-582H All dimensions are in inches. All dimensions are in inches. Outdoor Air Discharge Outdoor Air Discharge Exhaust Air Inlet L x K L x K H x J...
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Page 14: Optional Accessories Frost Control Application/Operation
Optional Accessories T1 = 10 minutes, T2 = 1 hour Frost Control Application/Operation Extremely cold outdoor air temperatures can cause T1 = 0.5, T2 = 0.5 moisture condensation and frosting on the energy The timer is now set for 5 minutes off and 30 recovery wheel. -
Page 15: Economizer Application/Operation
Economizer Application/Operation The energy recovery wheel operation can be altered The LED on the enthalpy controller should not light to take advantage of economizer operation (free and the energy recovery wheel should energize cooling). Two modes are available: and rotate. 1. -
Page 16: Variable Frequency Drives And Wiring
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 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). - Page 17 Factory Set Points - continued CO 2 SENSOR CONTROL FOR FAN SPEED Resetting the drive to factory defaults (1/2 SPEED WHEN C0 2 DROPS BELOW 700 PPM) To reset the drive back to Greenheck factory defaults Setting go to parameter A1-01 and set it to “2”. Then go to Parameter V1000 A1-03 and change it to “1110”...
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Page 18: Typical Wiring Diagram
Typical Wiring Diagram Following is an example of a typical wiring diagram located in the unit control center. This wiring diagram includes a legend highlighting which accessories were provided with the unit. Factory wiring and field wiring are also indicated. This particular example includes 1) variable frequency drives on the blowers requiring a modulating input, 2) modulating energy recovery wheel with factory controls for economizer, 3) energy recovery wheel rotation sensor, 4) outdoor air and exhaust air dirty filter switches, 5) motorized outdoor air and exhaust air intake dampers, and 6) timed exhaust frost control. -
Page 19: Sensors And Lights
Rotation Sensor Sensor The rotation sensor monitors energy recovery wheel This accessory is often used to provide a modulating rotation. If the wheel should stop rotating, the sensor control signal to a variable frequency drive to raise will close a set of contacts in the unit control center. and lower airflow in relationship to the CO levels Field wiring of a light (or other alarm) between... -
Page 20: Remote Control Panel And Wiring
Remote Control Panel and Wiring Indicator Lights powered by the ER Unit Schematics The remote panel is available with a number of different alarm lights and switches to control the unit. The remote panel ships loose and requires mounting Unit On/Off and wiring in the field The remote panel is available with the following options:... -
Page 21: Sensors Mounted By Factory
Sensors Mounted by Factory Factory mounted temperature, pressure, and current sensors are available in the locations indicated on the unit diagram below. A list of available sensors is shown below. The specific sensors provided on a given unit are labeled in the unit control center on the terminal strip. Sensors are wired to the terminal strip to make it easy for the controls contractor to connect the Building Management System for monitoring purposes. -
Page 22: Start-Up
Start-Up Rotate the fan wheels and energy recovery wheels by hand and ensure no parts are rubbing. If rubbing occurs, refer to Start-Up section for more DANGER information. Electric shock hazard. Can cause injury or death. Check the fan belt drives for proper alignment Before attempting to perform any service or and tension (refer to Start-Up section for more maintenance, turn the electrical power to unit... -
Page 23: Optional Accessories
Optional Accessories Checklist Refer to the respective sections in this Installation, Operation and Maintenance Manual for detailed information. Refer to wiring diagram in unit control center to determine what electrical accessories were provided. Provided with Unit? Frost Control Application / Operation section: Setting Factory Default Frost Control set point... -
Page 24: Fan
Unit Start-Up 5. Place belts over sheaves. Do not pry or force belts, as this could result in damage to the cords Refer to Parts List section for component locations. in the belts. Fans 6. With the fan off, adjust the belt tension by moving the motor base. -
Page 25: Energy Recovery Wheel
Vibration Drive Belt Excessive vibration may be experienced during initial Inspect the drive belt. Make sure the belt rides start-up. Left unchecked, excessive vibration can smoothly through the pulley and over the wheel rim. cause a multitude of problems, including structural Air Seals and/or component failure. -
Page 26: Fan Belts
Routine Maintenance Dampers Check all dampers to ensure they open and close DANGER properly and without binding. Backdraft dampers can be checked by hand to determine if blades open and Electric shock hazard. Can cause injury or death. close freely. Apply power to motorized dampers to Before attempting to perform any service or ensure the actuator opens and closes the damper as maintenance, turn the electrical power to unit... -
Page 27: Fan Wheel And Fasteners
Fan Wheel & Fasteners Filter Size and Quantities Wheels require very little attention when moving clean Internal Quantity Quantity Unit Size air. Occasionally oil and dust may accumulate on the Filter Size Supply Exhaust wheel causing imbalance. When this occurs the wheel ERV-251 16 x 25 and housing should be cleaned to assure smooth and... -
Page 28: Accessing Energy Recovery Wheel
Accessing the Energy Recovery Wheel in Removing the Energy Recovery Wheel in Models ERV-522 and 582 ERV-251 Disconnect power to the ERV. Remove access First, remove the drive belts and the collars in both panel(s) labeled “Energy Wheel Cassette Access”, bearings. -
Page 29: Cleaning Wheel Segments
Cleaning the Energy Recovery Wheel If the wheel appears excessively dirty, it should be cleaned to ensure maximum operating efficiency. Only excessive buildup of foreign material needs to be removed. Discoloration and staining of energy recovery wheel does not affect its performance. Thoroughly spray wheel matrix with household cleaner such as Fantastik ®... -
Page 30: Parts List
Parts List Inside layout of ERV-361 Inside layout of ERV-522 (shown with intake weatherhood, exhaust weatherhood, outdoor air filters, and exhaust air filters) 1. Supply blower 6. Optional exhaust weatherhood with birdscreen 7. Optional supply and exhaust air filter racks for 2 inch pleated, 30% efficient filters 2. -
Page 31: Sequence Of Operation
Sequence of Operation Basic Unit The ERV 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. -
Page 32: Troubleshooting - Airflow
Troubleshooting – Airflow Test and Balance Report The Test and Balance Report (TAB) is utilized to determine whether the appropriate amount of outdoor air and exhaust air is being supplied and removed from a building, respectively. There are no set rules on what information must be included in a TAB report. -
Page 33: Troubleshooting - Unit
Troubleshooting – Unit Symptom Possible Cause Corrective Action Replace fuse or reset circuit breaker and check Blown fuse or open circuit breaker. amps. Defective motor or capacitor. Replace. Blower fails to Motor starter overloaded. Reset starter and check amps. operate Check for On/Off switches. -
Page 34: Troubleshooting – Unit
Troubleshooting – Unit Symptom Possible Cause Corrective Action One or both blowers turn off Adjust frost temperature sensor set point as intermittently and Exhaust Only frost control sensors are tripping. needed. back on after about 2 minutes See Energy Recovery Wheel under Unit Start-Up Air seals are too tight. -
Page 35: Maintenance Log
Maintenance Log Date __________________ Time _____________ AM/PM Date __________________ Time _____________ AM/PM Notes:___________________________________________ Notes:___________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ Date __________________ Time _____________ AM/PM Date __________________ Time _____________ AM/PM Notes:___________________________________________ Notes:___________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ Date __________________ Time _____________ AM/PM... -
Page 36: Our Commitment
Our Commitment As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications without notice. Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in the Library under Warranties. Greenheck’s Energy Recovery Ventilator catalog provides AMCA Publication 410-96, Safety Practices for Users and additional information describing the equipment, fan performance, available accessories, and specification data.