AGI AIRLANCO C2000 User manual

Read this manual before using product. Failure to
follow instructions and safety precautions can
result in serious injury, death, or property
damage. Keep manual for future reference.
Part Number: 8210-30029 R0
Revised: February 2023
Original Instructions
Direct Drive Centrifugal Fan
Aeration Fan
Installation and Operation Manual
This manual applies to:
Direct Drive Aeration: C2000, C2200, C2700, C3000, C3300
High Speed Direct Drive: CH-2000, CH-2200, CH-2400, CH-2700, CH-3000
Low Speed Direct Drive: CL-2000, CL-2200, CL-2400, CL-2700, CL-3000, CL-3300, CL-3600, CL-4000
High Speed International Direct Drive: CHI-2000, CHI-2200, CHI-2400, CHI-2700, CHI-3000
Low Speed International Direct Drive: CLI-2200, CLI-2400, CLI-2700, CLI-3000, CLI-3300, CLI-3600, CLI-4000

This product has been designed and manufactured to meet general engineering standards. Other local
regulations may apply and must be followed by the operator. All personnel must be trained in the correct
operational and safety procedures for this product. Use the sign-off sheet below to record initial and periodic
reviews of this manual with all personnel.
Date Employee Name and Signature Employer Name and Signature

DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN
8210-30029 R0 3
CONTENTS
1. Introduction ............................................................................................................................................ 5
1.1 General Description................................................................................................................... 5
1.2 Serial Number Location............................................................................................................. 5
2. Safety....................................................................................................................................................... 6
2.1 Safety Alert Symbol and Signal Words...................................................................................... 6
2.2 General Safety Information....................................................................................................... 6
2.3 Fan Safety .................................................................................................................................. 7
2.4 Drives and Lockout/Tagout Safety ............................................................................................ 7
2.4.1 Electric Motor Safety.................................................................................................. 8
2.5 Personal Protective Equipment................................................................................................. 8
2.6 Safety Equipment ...................................................................................................................... 9
2.7 Safety Decals ............................................................................................................................. 9
2.7.1 Decal Installation/Replacement................................................................................. 9
2.7.2 Safety Decal Locations and Details ............................................................................ 9
3. Pre-Installation ..................................................................................................................................... 11
3.1 Receiving and Inspection ........................................................................................................ 11
3.2 Handling the Fan ..................................................................................................................... 11
3.3 Storing the Fan Before Installing............................................................................................. 11
4. Installation ............................................................................................................................................ 12
4.1 Installation Safety.................................................................................................................... 12
4.2 Elevated Fans........................................................................................................................... 13
4.3 Slab Mounted Fans.................................................................................................................. 14
4.4 Vibration Isolators ................................................................................................................... 14
4.5 Ducting Requirements............................................................................................................. 15
5. Operation .............................................................................................................................................. 16
5.1 Operation Safety ..................................................................................................................... 16
5.2 Air Pressure and Suction ......................................................................................................... 16
5.3 Start-Up and Break-In.............................................................................................................. 16
5.4 Fan Rotation and Orientation ................................................................................................. 17
5.5 Emergency Stop....................................................................................................................... 18
5.6 Shutdown ................................................................................................................................ 18
5.7 Storage..................................................................................................................................... 18
6. Maintenance ......................................................................................................................................... 19
6.1 Maintenance Safety ................................................................................................................ 19
6.2 Maintenance Schedule............................................................................................................ 19
6.3 Visually Inspect the Centrifugal Fan........................................................................................ 20
6.4 Cleaning the Fan Blade and Housing ...................................................................................... 20
6.5 Servicing and Part Replacement ............................................................................................. 20
6.5.1 Fan Wheel Replacement .......................................................................................... 21
6.5.2 Fan Wheel/Propeller Balance .................................................................................. 22
6.5.3 Motor Bearings Maintenance .................................................................................. 22
6.6 Replacement Parts .................................................................................................................. 29
7. Troubleshooting.................................................................................................................................... 30
8. Appendix ............................................................................................................................................... 33

DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN
4 8210-30029 R0
8.1 Torque Recommendations ...................................................................................................... 33
9. Warranty ............................................................................................................................................... 34

8210-30029 R0 5
1. Introduction
Thank you for your purchase. Follow the instructions in this manual for safe use of this centrifugal fan.
Following proper operation and maintenance will help to keep the centrifugal fan running in optimal
condition.
Keep this manual handy for frequent reference and to review with new personnel. A sign-off form is
provided on the inside front cover for your convenience. If any information in this manual is not
understood or if you need additional information, please contact AGI or your representative for
assistance.
This manual should be regarded as part of the equipment.
1.1. General Description
The AGI Airlanco propellers are dynamically balanced. Fully assembled fans are test run at operating speeds to
check the entire assembly for conformance to AGI Airlanco vibration limits.
1.2. Serial Number Location
The serial number location for your centrifugal fan is shown in the figure below. Have the serial number ready
when ordering parts or requesting service or other information. Record information in the table below for easy
reference.
Model Number
Serial Number
Date Received
DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN 1. INTRODUCTION

6 8210-30029 R0
2. Safety
2.1. Safety Alert Symbol and Signal Words
This safety alert symbol indicates important safety messages in this manual. When you see
this symbol, be alert to the possibility of injury or death, carefully read the message that
follows, and inform others.
Signal Words: Note the use of the signal words DANGER,WARNING,CAUTION, and NOTICE with the safety
messages. The appropriate signal word for each message has been selected using the definitions below as a
guideline.
Indicates an imminently hazardous situation that, if not avoided, will result in serious injury or
death.
Indicates a hazardous situation that, if not avoided, could result in serious injury or death.
Indicates a hazardous situation that, if not avoided, may result in minor or moderate injury.
Indicates a potentially hazardous situation that, if not avoided, may result in property damage.
2.2. General Safety Information
Read and understand all safety instructions, safety decals, and manuals and follow them when operating or
maintaining the equipment.
• Owners must give instructions and review the information initially and annually with
all personnel before allowing them in the work area. Untrained users/operators
expose themselves and bystanders to possible serious injury or death.
• Use for intended purposes only.
• Modification of the centrifugal fan in any way without written permission from the manufacturer is not
covered by the warranty.
• Follow a health and safety program for your worksite. Contact your local occupational health and safety
organization for information.
• Follow applicable local codes and regulations.
2. SAFETY DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN

8210-30029 R0 7
2.3. Fan Safety
• Keep away from fan impeller/blade; high suction can pull a
person toward the inlet. Contact with an unguarded
impeller/blade will cause severe injury.
• Keep the inlet screen in place at all times.
• Remove foreign material from the fan inlet before operating.
• Do not operate the fan if there is excessive vibration or noise.
• When the power is locked out, fans can still be dangerous
because of potential “windmilling.” Always block the
impeller/blade before working on any moving parts.
2.4. Drives and Lockout/Tagout Safety
Inspect the power source(s) before using and know how to shut down in an emergency.
Whenever you service or adjust your equipment, make sure you shut down your power
source and follow lockout and tagout procedures to prevent inadvertent start-up and
hazardous energy release. Know the procedure(s) that applies to your equipment from the
following power sources.
For example:
WARNING
• De-energize, block, and dissipate all sources of hazardous energy.
• Lock out and tag out all forms of hazardous energy.
• Ensure that only 1 key exists for each assigned lock, and that you are the only one that holds that key.
• After verifying all energy sources are de-energized, service or maintenance may be performed.
• Ensure that all personnel are clear before turning on power to equipment.
For more information on occupational safety practices, contact your local health and safety organization.
DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN 2. SAFETY

8 8210-30029 R0
2.4.1 Electric Motor Safety
Power Source
• Electric motors and controls shall be installed and serviced by
a qualified electrician and must meet all local codes and
standards.
• Do not modify the magnetic starter. This component provides
overload and under-voltage protection.
• Motor starting controls must be located so that the operator
has full view of the entire operation.
• Locate main power disconnect switch within reach from
ground level to permit ready access in case of an emergency.
• Motor must be grounded.
• Guards must be in place and secure at all times.
• Ensure electrical wiring and cords remain in good condition;
replace if necessary.
SERVICE DISCONNECT
ON
OFF
Lockout
• The main power disconnect switch should be in the locked position during shutdown or
whenever maintenance is performed.
• In the event of unexpected fan shutdown, the fan can be reset using the main power switch
located on the fan or using a reset button when equipped.
2.5. Personal Protective Equipment
The following Personal Protective Equipment (PPE) should be worn when assembling, operating or maintaining
the equipment.
•Safety Glasses
Wear safety glasses at all times to
protect eyes from debris.
•Steel-Toe Boots
Wear steel-toe boots to protect feet from
falling debris.
•Coveralls
Wear coveralls to protect skin.
•Work Gloves
Wear work gloves to protect your hands
from sharp and rough edges.
•Dust Mask
Wear a dust mask to prevent breathing
potentially harmful dust.
•Hearing Protection
Wear ear protection to prevent hearing
damage.
2. SAFETY DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN

8210-30029 R0 9
2.6. Safety Equipment
The following safety equipment should be kept on site.
•Fire Extinguisher
Provide a fire extinguisher for use in case
of an accident. Store in a highly visible
and accessible place.
•First-Aid Kit
Have a properly-stocked first-aid kit
available for use should the need arise,
and know how to use it.
2.7. Safety Decals
• Keep safety decals clean and legible at all times.
• Replace safety decals that are missing or have become illegible. See decal location figures that follow.
• Replaced parts must display the same decal(s) as the original part.
• Replacement safety decals are available free of charge from your distributor, dealer, or factory as applicable.
2.7.1 Decal Installation/Replacement
1. Decal area must be clean and dry, with a temperature above 50°F (10°C).
2. Decide on the exact position before you remove the backing paper.
3. Align the decal over the specified area and carefully press the small portion with the exposed sticky backing
in place.
4. Slowly peel back the remaining paper and carefully smooth the remaining portion of the decal in place.
5. Small air pockets can be pierced with a pin and smoothed out using the decal backing paper.
2.7.2 Safety Decal Locations and Details
Replicas of the safety decals that are attached to the centrifugal fan and their messages are shown in the figure
(s) that follow. Safe operation and use of the centrifugal fan requires that you familiarize yourself with the
various safety decals and the areas or particular functions that the decals apply to, as well as the safety
precautions that must be taken to avoid serious injury, death, or damage.
DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN 2. SAFETY

10 8210-30029 R0
Figure 1. Safety Decal Locations
10009
140
10008930
10008890
Table 1. Safety Decal Details
To prevent serious injury or death:
• Only qualified personnel should service
electrical components.
• Disconnect and lockout power before
inspecting or servicing unit.
• Keep electrical components in good repair.
ELECTROCUTION HAZARD
WARNING
10008930
AIR-FLOW
AIR-FLOW
10008890
10009140
2. SAFETY DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN

8210-30029 R0 11
3. Pre-Installation
Before continuing, ensure you have completely read and understood this manual’s
Safety section, in addition to the safety information in the section(s) below.
3.1. Receiving and Inspection
Inspect the fan and accessories for any shipping damage on receipt. Turn the propeller by hand to see that it
rotates freely and does not bind.
FOB factory shipping terms require that the receiver be responsible for inspecting the equipment upon arrival.
Note damage or shortages on the Bill of Lading and file any claims for damage or loss in transit. AGI Airlanco will
assist the customer as much as possible; however, claims must be originated at the point of delivery.
3.2. Handling the Fan
Lift the fan by the base or lifting locations. Never lift a fan by the wheel, motor, motor bracket, housing inlet,
outlet, or any fan part not designed for lifting. A spreader should always be used to avoid damage.
FAX [phone] www.airlanco.com
4
Receiving and Inspection
The fan and accessories should be inspected on receipt for any shipping damage. Remove safety wire from
wheel before attempting to start. Turn the wheel by hand to see that it rotates freely and does not bind. If
dampers or shutters are provided, check these accessories for free operation of all moving parts.
FOB factory shipping terms require that the receiver be responsible for inspecting the equipment upon arrival.
Note damage or shortages on the Bill of Lading and file any claims for damage or loss in transit. AIRLANCO will
assist the customer as much as possible; however, claims must be originated at the point of delivery.
Fan Installation
AIRLANCO wheels are dynamically balanced when fabricated. Fully assembled fans are test run at operating
speeds to check the entire assembly for conformance to AIRLANCO vibration limits. Nevertheless, all units must
be adequately supported for smooth operation. Ductwork or stacks should be independently supported as
excess weight may distort the fan housing and cause contact between moving parts. Duct connections at
the fan inlet or outlet should be flexible to isolate the fan from a different duct diameter, from vibration and from
noise. Where vibration isolators are used, consult the AIRLANCO certified drawing for proper location and
adjustment. Electrical installation shall be in accordance with NFPA 70 “National Electrical Code” and all
applicable local codes.
Handling
Fans should only be lifted by the base, mounting supports, or lifting rings. Never lift a fan by the wheel, motor,
motor bracket, housing inlet, outlet, or any fan part not designed for lifting. A spreader should always be used to
avoid damage.
LIFTING RING
3.3. Storing the Fan Before Installing
Check the fan wheel and dampers for free operation and lubricate moving parts prior to storage if the fan is not
to be placed immediately into service. Inspect the stored unit periodically.
Rotate the wheel by and every two to four weeks to redistribute grease on internal bearing parts.
DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN 3. PRE-INSTALLATION

12 8210-30029 R0
4. Installation
Before continuing, ensure you have completely read and understood this manual’s
Safety section, in addition to the safety information in the section(s) below.
4.1. Installation Safety
• Do not take chances with safety. The components can be large, heavy, and hard to handle.
Always use the proper tools, rated lifting equipment, and lifting points for the job.
• Always have two or more people installing the centrifugal fan.
• Make sure you have sufficient lighting for the work area.
• The equipment shall be installed in accordance with applicable local codes and regulations.
• All installation and servicing operations are to be carried out by qualified technicians.
• Tighten all fasteners according to their specifications. Do not replace or substitute bolts,
nuts, or other hardware that is of lesser quality than the hardware supplied by the
manufacturer.
4. INSTALLATION DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN

8210-30029 R0 13
4.2. Elevated Fans
When an elevated or suspended structural steel platform is used, it must have sufficient bracing to support the
unit load and prevent side sway. The platform should be of welded construction to maintain permanent
alignment of all members.
When installing the fan on an elevated platform:
• Fully support the fan with a welded angle iron frame, anchored to the concrete bin wall.
Figure 2. Fan Anchored to Concrete Bin Wall (Centrifugal Fan)
FAX [phone] www.airlanco.com
5
Storage
Check dampers for free operation and lubricate moving parts prior to storage if fan is not to be placed immediately
into service. Inspect the stored unit periodically. Rotate the wheel by hand every two to four weeks to
redistribute grease on internal bearing parts.
Elevated Units
When an elevated or suspended structural steel platform is used, it must have sufficient bracing to support the
unit load and prevent side sway. The platform should be of welded construction to maintain permanent alignment
of all members.
AIRLANCO
AIRLANCO
AIRLANCO
DO NOT hang fan with
cables. Lifting rings are
for lifting only –not for
long term load bearing.
DO NOT hang fan on a
steel bin. Fans on steel
bins must be supported
independently.
DO NOT attempt to
support fan with ducting.
Ducting is not designed
to be load bearing.
PROPER INSTALLATION
Fan is fully supported by a
welded angle iron frame,
which is anchored to the
concrete bin wall.
AIRLANCO
FAX [phone] www.airlanco.com
5
Storage
Check dampers for free operation and lubricate moving parts prior to storage if fan is not to be placed immediately
into service. Inspect the stored unit periodically. Rotate the wheel by hand every two to four weeks to
redistribute grease on internal bearing parts.
Elevated Units
When an elevated or suspended structural steel platform is used, it must have sufficient bracing to support the
unit load and prevent side sway. The platform should be of welded construction to maintain permanent alignment
of all members.
AIRLANCO
AIRLANCO
AIRLANCO
DO NOT hang fan with
cables. Lifting rings are
for lifting only –not for
long term load bearing.
DO NOT attempt to
support fan with ducting.
Ducting is not designed
to be load bearing.
PROPER INSTALLATION
Fan is fully supported by a
welded angle iron frame,
which is anchored to the
concrete bin wall.
AIRLANCO
FAX [phone] www.airlanco.com
5
Storage
Check dampers for free operation and lubricate moving parts prior to storage if fan is not to be placed immediately
into service. Inspect the stored unit periodically. Rotate the wheel by hand every two to four weeks to
redistribute grease on internal bearing parts.
Elevated Units
When an elevated or suspended structural steel platform is used, it must have sufficient bracing to support the
unit load and prevent side sway. The platform should be of welded construction to maintain permanent alignment
of all members.
AIRLANCO
AIRLANCO
AIRLANCO
DO NOT hang fan with
cables. Lifting rings are
for lifting only –not for
long term load bearing.
DO NOT hang fan on a
steel bin. Fans on steel
bins must be supported
independently.
DO NOT attempt to
support fan with ducting.
Ducting is not designed
to be load bearing.
PROPER INSTALLATION
Fan is fully supported by a
welded angle iron frame,
which is anchored to the
concrete bin wall.
AIRLANCO
DO NOT hang fan with cables.
Lifting rings are for lifting only –
not for long term load bearing.
DO NOT hang fan on a steel bin.
Fans on steel bins must be
supported independently.
DO NOT attempt to support fan
with ducting. Ducting is not
designed to be load bearing.
DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN 4. INSTALLATION

14 8210-30029 R0
4.3. Slab Mounted Fans
A concrete foundation is preferable for installing floor-mounted fans. The mass of the base must maintain the
fan/driver alignment, absorb normal vibration, and resist lateral loads.
When installing the fan on a concrete pad the following general requirements apply:
• The concrete surface must be flat and level.
• The weight of the slab should be two to three times the weight of the rotating assembly, including the
motor.
• The foundation requires firmly anchored fasteners such as the anchor bolts shown below. Hammer-drilled
expansion fasteners can be used in less demanding applications.
• The overall dimensions of the concrete base should extend at least six inches beyond the base of the fan.
• Provide adequate drainage to protect the fan.
• Move the fan to the mounting location and lower it over the anchor bolts, leveling the fan with shims
around the bolts. Fasten the fan securely.
• When grout is used: Shim the fan at least 3/4-inch from the concrete base.
• When isolation is used: Check the AGI Airlanco certified drawing for installation instructions.
Figure 3. Slab Mounted Fan
Item Description
1Tunnel Transition (not load bearing)
2 Fan Base Support
3Anchor
4Tunnel Adaptor
4.4. Vibration Isolators
Where vibration isolators are used, consult the AGI Airlanco certified drawing for proper location and
adjustment.
4. INSTALLATION DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN

8210-30029 R0 15
4.5. Ducting Requirements
When connecting ducting, the following requirements apply:
• Ensure the fan fits properly with the transition ducting.
• Independently support ductwork or stacks, as excess weight may distort the fan housing and cause contact
between moving parts.
• Duct connections at the fan inlet or outlet should be flexible to isolate the fan from a different duct
diameter, from vibration and from noise.
• Do not support the fan with ducting.
Using ducting to support the fan can damage the fan and ducting.
DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN 4. INSTALLATION

16 8210-30029 R0
5. Operation
Before continuing, ensure you have completely read and understood this manual’s
Safety section, in addition to the safety information in the section(s) below.
5.1. Operation Safety
• Ensure appropriate safety accessories are installed. Selection and use of safety accessories
for the specific installation is the responsibility of the customer.
• Keep away from fan impeller/blade; high suction can pull a person toward the inlet. Contact
with an unguarded impeller/blade will cause severe injury.
• Keep inlet screen and safety guards securely in place at all times.
• Ensure the fan inlet, outlet, bin floor ductwork and roof vents are not plugged with any
foreign material.
• Do not operate the fan if there is excessive vibration or noise.
• Ensure that electrical cords are in good condition; replace if necessary.
• Ensure maintenance has been performed and is up to date.
5.2. Air Pressure and Suction
Fans present a hazard from the suction created at the fan inlet in addition to the normal dangers of rotating
machinery. This suction can draw materials into the fan where they become high velocity projectiles at the
outlet. Suction can also be extremely dangerous to persons in close proximity to the inlet, as the forces involved
can overcome the strength of most individuals. Inlets and outlets that are not ducted should be screened to
prevent entry and discharge of solid objects.
5.3. Start-Up and Break-In
1. Check for any loose items or debris that could be drawn into the fan or dislodged by the fan discharge.
Check the interior of the fan as well.
2. Turn the fan impeller/blade by hand to check for binding.
3. Check the tightness of all nuts and bolts. See Section 8.1 – Torque Recommendations on page 33.
4. Install any remaining safety devices and guards.
5. Ensure that the fan inlet is not obstructed or restricted in any way.
6. Verify that the supply voltage is correct.
7. “Bump” the starter to check for proper airflow into the bin.
8. Start the fan and check for unusual sounds or excessive vibration (if required, refer to Section 7. –
Troubleshooting on page 30).
9. Do not run the fan for more than a few seconds if the ductwork is not fully installed. Use extreme caution
when testing the fan with ducting disconnected.
5. OPERATION DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN

8210-30029 R0 17
Normal operating speed may not be obtained without overloading the motor when the
ductwork is not installed.
10. Once the ductwork is attached, check for correct fan speed and complete installation.
5.4. Fan Rotation and Orientation
Fan rotation and orientation are determined by viewing the fan from the motor side.
Figure 4. Airflow Direction
Abbreviations:
CW - Clockwise Rotation TH - Top Horizontal Discharge UB - Upblast Discharge
CCW - Counter Clockwise Rotation BH - Bottom Horizontal Discharge DB - Downblast Discharge
DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN 5. OPERATION

18 8210-30029 R0
5.5. Emergency Stop
Foreign Object Obstruction
1. Immediately shut down the centrifugal fan and lock out the power source.
2. Remove the obstruction.
3. Inspect the inlet screen and fan wheel assembly for damage. Repair or replace as required.
Excessive Fan Vibration or Noise
1. Immediately shut down and lock out the power source.
2. Inspect the inlet for an obstruction, remove if necessary.
3. Restart the centrifugal fan to see if it is still vibrating excessively. If it is, immediately shut off the fan and
lock out power source.
4. Contact your local dealer for inspection of the fan wheel assembly.
5.6. Shutdown
Æ
1. Single Phase Models: Move the toggle switch to the OFF position.
Æ
2. Three Phase Models: Press the red STOP button.
3. When shutting down the fan for extended periods of time, shut off the power at the disconnect/source to
prevent any inadvertent start-up of the fan.
DO NOT close roof vents until fan has been turned off, or roof damage may occur.
5.7. Storage
1. Ensure that all foreign material is removed from the fan.
2. Inspect electrical wires and repair if necessary.
3. Inspect all parts and components and repair or replace as required.
4. Cover the fan with a tarp to keep out foreign material and protect it from weather conditions.
5. Ensure the storage area is in a clean and dry location.
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8210-30029 R0 19
6. Maintenance
Before continuing, ensure you have completely read and understood this manual’s
Safety section, in addition to the safety information in the section(s) below.
6.1. Maintenance Safety
• Keep components in good condition. Follow the maintenance
procedures.
• Ensure the service area is clean, dry, and has sufficient
lighting.
• Do not modify any components without written authorization
from the manufacturer. Modification can be dangerous and
result in serious injuries.
• Shut down and lock out power before maintaining
equipment.
• The rotating assembly should be blocked securely before
attempting maintenance of any kind.
• All electrical maintenance must be performed by a qualified
electrician in accordance with all applicable local codes and
standards.
• After maintenance is complete, replace all guards, service
doors, and/or covers.
• Use only genuine AGI Airlanco replacement parts or
equivalent. Use of unauthorized parts will void warranty. If in
doubt, contact AGI Airlanco or your local dealer.
6.2. Maintenance Schedule
Proper maintenance habits mean a longer life, better efficiency, and safer operation of the unit. Please follow
the Maintenance Schedule below. Keep good records of the hours the centrifugal fan has been operated and
the maintenance performed.
Daily:
Section 6.3 – Visually Inspect the Centrifugal Fan on page 20
Annually or as needed:
Section 6.4 – Cleaning the Fan Blade and Housing on page 20 and Section 6.5.3 – Motor Bearings
Maintenance on page 22
As Required:
Section 6.5.2 – Fan Wheel/Propeller Balance on page 22
DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN 6. MAINTENANCE

20 8210-30029 R0
6.3. Visually Inspect the Centrifugal Fan
Check the following during a visual inspection:
1. Ensure all guards are in place and in good working order.
2. Examine the centrifugal fan for damage or unusual wear. Make sure the impeller is clean, undamaged, and
rotates freely.
3. Ensure motor is grounded through the ground lug attached to the control box.
4. Be sure all safety decals are in place and are legible.
5. Check that the air intake area is free of obstructions.
6. Inspect all moving or rotating parts to see if anything has become entangled in them. Remove any entangled
material.
7. Check all components. Replace damaged or worn parts before using the centrifugal fan.
8. Check tightness of bolts/nuts, fasteners, and hardware. Ensure the motor mounting and impeller hub bolts
are torqued to 30 ft/lb.
6.4. Cleaning the Fan Blade and Housing
1. Check the housing and fan blade regularly for debris buildup drawn in by the airstream.
2. It is not recommended that the inlet screen be removed for cleaning. If the screens or inlet cones are
removed, they must be installed in the exact same place.
3. Use a pressure washer or hose to remove debris from housing and blades.
6.5. Servicing and Part Replacement
If there is any service/part replacement work required on the fan, it is important to reinstall the fan wheel
assembly in exactly the same position.
Failure to reinstall the fan wheel in the same position will cause premature wear, vibration,
and part failure.
Ensure the edge of the inlet cone (fit into the wheel cover) covers approximately 1/2 of the lip on the face plate
of the wheel.
Failure to reinstall the inlet cone and screen before operating the fan may result in serious
injury or death.
6. MAINTENANCE DIRECT DRIVE CENTRIFUGAL FAN – AERATION FAN