GREENHECK AER Sidewall Propeller Fans Instruction Manual

GREENHECK AER Sidewall Propeller Fans

Product Information

The Model AER and BAER Sidewall Propeller Fans are axial exhaust and supply fans designed for factory and warehouse applications where high volumes of air and low pressures are required. These fans offer a comprehensive range of construction and performance capabilities, making them ideal for various ventilation needs. The wall-mounted fans include both direct- and belt-driven options with different impeller styles for exhaust, supply, and filtered supply applications. The optional filtered supply wall housings are designed with the draw-thru concept to achieve high filter and fan efficiencies. The fans feature permanent 2-inch washable filters that can be easily accessed for cleaning.

Safety Information

It is important to follow all safety precautions and guidelines when installing, operating, and maintaining the fan. Failure to do so may result in personal injury, property damage, and voiding of the product warranty.

1. Only qualified personnel should install the fan. They should have a clear understanding of the instructions and general safety precautions. If additional information is needed, consult a licensed professional engineer.
2. Follow all local electrical and safety codes, including the National Electrical Code (NEC), the National Fire Protection Agency (NFPA), and the Canadian Electric Code (CEC) in Canada.
3. Ensure that the propeller rotates freely without striking or rubbing any stationary objects.
4. The motor must be securely and adequately grounded.
5. Do not spin the fan propeller faster than the maximum cataloged fan RPM. Adjustments to fan speed can affect motor load, so check the motor current to ensure it does not exceed the motor nameplate amps if the fan RPM is changed.
6. Avoid kinking or allowing the power cable to come in contact with oil, grease, hot surfaces, or chemicals. Replace the cord immediately if damaged.
7. Verify that the power source is compatible with the equipment.
8. Never open access doors to a duct while the fan is running.

DANGER: Always disconnect, lock, and tag the power source before installing or servicing to prevent fire, shock, or serious injury.

CAUTION: The motor may be hot enough to cause pain or injury when servicing the fan. Allow the motor to cool before servicing.

CAUTION: Precaution should be taken in explosive atmospheres.

Receiving and Unpacking

When receiving the fan, follow these steps:

1. Verify that all required parts and the correct quantity of each item have been received.
2. If any items are missing, report shortages to your local representative to arrange for obtaining missing parts.
3. Note that due to transportation and truck space limitations, all items for the unit may not be shipped together.
4. Confirm the shipment(s) based on the items listed on the bill of lading.

Supply system

Axial Exhaust and Supply Fans
Axial propeller wall fans are ideal for factory and warehouse applications where high volumes of air and low pressures are required. From general ventilation to industrial duty, the range of construction and performance capabilities offered represent the most comprehensive sidewall propeller fan line in the industry. Wall-mounted fans include both direct- and belt-driven fans with various impeller styles for exhaust, supply, and filtered supply applications.
Axial Filtered Supply Fans
Optional filtered supply wall housings are designed with the draw-thru concept to achieve the highest filter and fan efficiencies. Permanent 2‑inch washable filters are accessed through a bolted panel and can be easily removed for cleaning.

General Safety Information

Only qualified personnel should install this fan. 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) and the National Fire Protection Agency (NFPA), where applicable. Follow the Canadian Electric Code (CEC) in Canada.
2. The rotation of the propeller is critical. It must be free to rotate without striking or rubbing any stationary objects.
3. The motor must be securely and adequately grounded.
4. Do not spin the fan propeller faster than max 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. Do not allow the power cable to kink or come in contact with oil, grease, hot surfaces, or chemicals. Replace the cord immediately if damaged.
6. Verify that the power source is compatible with the equipment.
7. Never open access doors to a duct while the fan is running.

DANGER
Always disconnect, lock, and tag the power source before installing or servicing. Failure to disconnect the power source can result in fire, shock or serious injury.
CAUTION
When servicing the fan, the motor may be hot enough to cause pain or injury. Allow the motor to cool before servicing.
CAUTION
Precaution should be taken in explosive atmospheres.

Receiving
Upon receiving the product check to ensure all items are accounted for by referencing the delivery receipt or packing list. Inspect each crate or carton for shipping damage before accepting delivery. Alert the carrier of any damage detected. The customer will make a notation of damage (or shortage of items) on the delivery receipt and all copies of the bill of lading which is countersigned by the delivering carrier. If damaged, immediately contact your local representative. Any physical damage to the unit after acceptance is not the responsibility of the manufacturer.
Unpacking
Verify that all required parts and the correct quantity of each item have been received. If any items are missing, report shortages to your local representative to arrange for obtaining missing parts. Due to the availability of transportation and truck space, all items for the unit may not be shipped together. Confirmation of shipment(s) must be limited to only items on the bill of lading.
Note: The filtered supply unit ships with all ordered components completely factory-assembled. The optional weather hood ships were knocked down for field assembly and installation.
Storage
Fans are protected against damage during shipment. If the unit cannot be installed and operated immediately, precautions need to be taken to prevent deterioration of the unit during storage. The user assumes responsibility of the fan and accessories while in storage. The manufacturer will not be responsible for damage during storage. These suggestions are provided solely as a convenience to the user.
Storage Environment
The ideal environment for the storage of fans and accessories is indoors, above grade, in a low-humidity atmosphere that is sealed to prevent the entry of blowing dust, rain, or snow. Temperatures should be evenly maintained between 30° to 110°F (-1° to 43°C). Wide temperature swings may cause condensation and “sweating” of metal parts. All accessories must be stored indoors in a clean, dry atmosphere. Remove any accumulations of dirt, water, ice, or snow and wipe dry before moving to indoor storage. To avoid “sweating” of metal parts allow cold parts to reach room temperature. To dry parts and packages use a portable electric heater to get rid of any moisture build-up. Leave coverings loose to permit air circulation and to allow for periodic inspection. The unit should be stored at least 3-1/2 inches off the floor on wooden blocks covered with moisture-proof paper or polyethylene sheathing. Aisles between parts and along all walls should be provided to permit air circulation and space for inspection. Fans designed for outdoor applications may be stored outdoors, if absolutely necessary. Roads or aisles for portable cranes and hauling equipment are needed. The fan should be placed on a level surface to prevent water from leaking into the fan. The fan should be elevated on an adequate number of wooden blocks so that it is above water and snow levels and has enough blocking to prevent it from settling into soft ground. Locate parts far enough apart to permit air circulation, sunlight, and space for periodic inspection. To minimize water accumulation, place all fan parts on blocking supports so that rainwater will run off. Do not cover parts with plastic film or tarps as these cause condensation of moisture from the air passing through heating and cooling cycles. Fan propellers should be blocked to prevent spinning caused by strong winds.

Inspection and Maintenance During Storage
While in storage, inspect fans once per month. Keep a record of inspection and maintenance performed. If moisture or dirt accumulations are found on parts, the source should be located and eliminated. At each inspection, rotate the wheel by hand ten to fifteen revolutions to distribute lubricant in the motor. If paint deterioration begins, consideration should be given to touch-up or repainting. Fans with special coatings may require special techniques for touch-up or repair. Machined parts coated with rust preventive should be restored to good condition promptly if signs of rust occur. Immediately remove the original rust preventive coating with petroleum solvent and clean it with lint-free cloths. Polish any remaining rust from the surface with crocus cloth or fine emery paper and oil. Do not destroy the continuity of the surfaces. Thoroughly wipe clean with Tectyl® 506 (Ashland Inc.) or the equivalent. For hard-to-reach internal surfaces or for occasional use, consider using Tectyl® 511M Rust Preventive, WD-40®, or the equivalent.

Removing From Storage
As fans are removed from storage to be installed in their final location, they should be protected and maintained in a similar fashion until the fan equipment goes into operation.

Installation

Pre-Installation Checks

1. Check the chart below for the correct wall opening dimensions.
2. Check motor voltage and amperage rating for compatibility with electrical supply. Supply wiring must be properly fused and conform to local and national codes.
3. Motor load amperage must be checked and compared to nameplate rating to avoid serious damage to the motor when speed is increased.

Wall Opening Requirements
Wall opening size and propeller-to-damper distance are two important dimensions for fan installation. Fans mounted to the wall require a different wall opening size than those mounted in collars or wall housings.

Propeller-to-damper distance (M) is important to reduce turbulence and damper flutter which may lead to premature damper failure.

• Figures 1 and 2 show the wall opening recommended for installations with either a wall housing or collar.
• Figure 3 shows the recommended wall opening when a fan is to be place within the wall opening.
• Figure 4 shows the recommended wall opening and the minimum distance (M) suggested between the fan and damper for HCAI Seismic direct-to-wall installations.
• Figure 5 shows the dimensions and wall opening recommended for installations with filtered supply wall housing.

Fan Size| Damper Size Square| Recommended Wall Opening Square| M

Minimum

| Filtered Supply Wall Housing Only
---|---|---|---|---
Figure 1 and 2| Figure 3| Figure 4| Figure 5| A Sq.| B| C| D| Filter Quantity and Size
AER Direct Drive
20| 22| 27.375| 26.625| 23.25| –| 12| –| –| –| –| –| –
24| 26| 33.5| 32.625| 26.125| 33.5| 13| 32.625| 38.5| 63.5| 64.125| 4| 17 x 24
30| 32| 39.5| 38.625| 32.125| 39.5| 13| 38.625| 44.5| 65.375| 66| 4| 20 x 25
36| 38| 45.5| 44.625| 38.125| 45.5| 14| 44.625| 50.5| 67.75| 68.375| 6| 23 x 24
42| 44| 51.5| 50.625| 44.125| 51.5| 15| 50.625| 56.5| 73.375| 74| 6| 25 x 26
48| 50| 57.5| 56.625| 50.125| 57.5| 16| 56.625| 62.5| 73.5| 74.125| 12| 19 x 24
54| 56| 63.375| 62.5| 56| –| 17| –| –| –| –| –| –
60| 62| 69.375| 68.5| 62| –| 19| –| –| –| –| –| –
BAER Belt Drive
24| 26| 33.5| 32.625| 26.125| 33.5| 13| –| –| –| –| –| –
30| 32| 39.5| 38.625| 32.125| 39.5| 13| –| –| –| –| –| –
36| 38| 45.5| 44.625| 38.125| 45.5| 14| –| –| –| –| –| –
42| 44| 51.5| 50.625| 44.125| 51.5| 15| –| –| –| –| –| –
48| 50| 57.5| 56.625| 50.125| 57.5| 16| –| –| –| –| –| –

Typical Installation

DANGER
Always disconnect, lock, and tag the power source before installing or servicing. Failure to disconnect the power source can result in fire, shock, or serious injury. Move the fan to the desired location and determine the method by which the fan is to be mounted as shown in Figures 1-5 shown on page 3. Optional wall mount housings (Figure 1) and wall mount collars (Figure 2) provide a convenient means of mounting sidewall propeller fans while maintaining the proper distance between the propeller and damper. Attach the fan by inserting a suitable fastener through each of the pre-punched mounting holes in the fan panel. Care should be taken not to bend or distort the fan panel or drive components during installation.
Support Braces
Wall Housing sizes 42 and larger with heavy motors and all Filtered Supply Wall Housings need additional bracing.

Filtered Supply Wall Housing Installation

• Step 1 – Install Housing
  Install housing through a wall opening from the outside. Temporarily brace the end of the unit until permanent support braces are installed. Secure through pre-punched holes in angles with suitable fasteners.

• Step 2 – Install Support Braces
  Choose a method of support. Attach support to the end of the unit (above or below housing) with rods, cable, angle, etc. (supplied by others) as shown. Vertical braces must carry a minimum load of 500 pounds per support, and angled (45°) braces a minimum of 750 pounds per support based on two supports.

• Step 3 – Install Weather hood
  Position the weather hood over the end of the wall housing and fasten it through mounting holes with self-tapping screws. Caulk, flash, and complete electrical hook-up to finish the installation.

Pre-Start-Up Checks

Check all fasteners and setscrews for tightness. This is especially important for bearing setscrews. The propeller should rotate freely and not rub on the fan panel venturi. The rotation direction of the propeller should be checked by momentarily turning the unit on. The propeller blade should cup and throw the air when rotating in the correct rotation as shown in the figure. Rotation should be in the same direction as the rotation decal affixed to the unit.

For 3-phase installations, fan rotation can be reversed by simply interchanging any two of the three electrical leads. For single-phase installations follow the wiring diagram located on the motor. For belt drive fans, the adjustable motor pulley is preset at the factory for the specified fan RPM. Fan speed can be increased by closing or decreased by opening the adjustable pulley. Two or three groove variable pitch pulleys must be adjusted an equal number of turns open. Any increase in fan speed represents a substantial increase in horsepower required from the motor. Always check motor load amperage and compare it to the nameplate rating when changing fan speed.

DANGER
Always disconnect, lock and tag power source before installing or servicing. Failure to disconnect power source can result in fire, shock or serious injury. Once the fan has been put into operation, a periodic maintenance program should be set up to preserve the reliability and performance of the fan. Items to be included in this program are belts, bearings, fasteners and setscrews, lubrication, and removal of dust and dirt.
Belts
Premature belt failures are frequently caused by improper belt tension (either too tight or too loose) or misaligned pulleys. The proper tension for operating a V-belt is the lowest tension at which the belts will not slip at peak load conditions. For initial tensioning, the proper belt deflection halfway between pulley centers is 1/64 inch for each inch of belt span. For example, if the belt span is 64 inches, the belt deflection should be one inch using moderate thumb pressure at midpoint of the drive. See figure shown below.

Check belt tension two times during the first 24 hours of operation and periodically thereafter. It is very important that the drive pulleys remain in proper alignment after adjustments are made. Misalignment of pulleys will result in premature belt wear noise, vibration and power loss.

Automatic Belt-Tensioner

• Automatic belt-tensioners adjust belt tension as the belt wears which can maximize the life of the belt(s). Proper belt tension helps minimize drive losses which improves fan efficiencies.
• If belt replacement is necessary apply a wrench to the nut on the backside of the tensioner belt pulley, pushdown to loosen the spring tensioner, and remove the belt.
• To install belt, reverse the noted process. After belt replacement, check belt tension two times in the first 24 hours of operation and periodically thereafter.

Bearings

Bearings are the most critical moving part of the fan and should be inspected at periodic intervals. Locking collars and setscrews, in addition to fasteners attaching the bearings to the bearing plate, must be checked for tightness. In a clean environment and temperatures above 32ºF (0ºC) and below 200ºF (93ºC), fan shaft bearings with grease fittings should be lubricated semiannually using a high-quality lithium complex grease. If  unusual environmental conditions exist, temperatures below 32ºF (0ºC) and above 200ºF (93ºC), moisture or contaminants, more frequent lubrication is required. With the unit running, add grease very slowly with a manual grease gun until a slight bead of grease forms at the seal. Be careful not to unseat the seal by over lubricating or using excessive pressure. Bearings without grease fittings are lubricated for life.

Fasteners and Setscrews

Any fan vibration has a tendency to loosen mechanical fasteners. A periodic inspection should include checking all fasteners and setscrews for tightness. Particular attention should be paid to setscrews or taper-lock bushings attaching the propeller to the motor shaft and the motor shaft to the bearings. Loose bearing setscrews will lead to premature failure of the fan shaft. In addition, check all fasteners attaching the motor to the motor plate.

Lubrication

Refer to the paragraph on bearings for bearing lubrication. Many fractional horsepower motors installed on the smaller fans are lubricated for life and require no further attention. Motors equipped with oil holes should be oiled in accordance with the manufacturer’s instructions printed on the motor. Use a high-grade SAE 20 machine oil and use caution not to over-lubricate. Motors supplied with grease fittings should be greased according to directions printed on the motor.

Removal of Dust and Dirt

Dirt clogs cooling openings on the motor housing, contaminates bearing lubricant, and collects on propeller blades causing severe imbalance if left unchecked. The exterior surface of the motor, fan panel, and entire propeller should be thoroughly cleaned periodically. Use caution and do not allow water or solvents to enter the motor or bearings. Motors or bearings must not be sprayed with steam or water. The filters also require periodic cleaning. The 2-inch washable aluminum filters are accessed through the bolted access panel.

Troubleshooting

WARNING
Before taking any corrective action, make certain the unit is not capable of operation during repairs.

proper operation. Remove obstructions in ductwork. Clean dirty filters. Check for adequate supply air for exhaust fans or exhaust air for supply fans.
Fan too close to damper| Increase the distance between the fan and the damper.
Fan speed too low| Increase fan speed.
Excessive dirt buildup on the propeller| Clean propeller.
Excessive noise| Bearings| Tighten collars and fasteners. Lubricate bearings. Replace defective bearings.
V-belt drive| Tighten pulleys on the motor and fan shaft. Adjust belt tension. Align pulleys properly. Replace worn belts or pulleys. See Maintenance.
Excessive vibration| Clean dirt buildup from the propeller. Check all set screws and fasteners for tightness. Check for worn bearings. Correct propeller imbalance. Check for loose dampers, guards, or ductwork.
Defective motor| Replace motor.

Variable frequency drive (VFD)

| Check VFD for drive setting, some controllers are able to be adjusted to lower the harmonic noises sometimes heard during operation by adjusting a simple setting on the controller.
Debris| Remove all debris from the fan.
Fan does not operate| Electrical supply| Check fuses/circuit breakers. Check for switches turned off or disconnected. Check for the correct supply voltage.
Drive| Check for broken or worn belts. Tighten loose pulleys.
Motor| Assure the motor is correct horsepower and not a tripping overload protector.

Parts List

Each fan bears a manufacturer’s nameplate with the model number and serial number embossed. This information will assist the local representative and the factory in providing service and replacement parts. Before taking any corrective action, make certain unit is not capable of operation during repairs.

CAUTION
A fan manufactured with an explosion-resistant motor does not certify the entire unit to be explosion-proof. Refer to the UL Listing Mark for the fans- approved usage.

Maintenance Log

Our Commitment
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications without notice. Greenheck’s AER and BAER Sidewall Propeller Fans catalog provides additional information describing the equipment, fan performance, available accessories, and specification data.

CONTACT

• Phone: 715.359.6171
• Fax: 715.355.2399
• Parts: 800.355.5354
• E-mail: gfcinfo@greenheck.com.
• Website: www.greenheck.com.
• 486298
• AER and BAER,
• Rev. 1,
• September 2023

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. Copyright 2023 © Greenheck Fan Corporation

References

• Error page
• AMCA - Air Movement and Control Association International, Inc.

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