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IM-995
SEPTEMBER 2023
REVIEW AMCA PUBLICATION 410 PRIOR TO INSTALLATION
This manual has been prepared to guide the users of industrial centrifugal fans in the proper installation, operation and maintenance
procedures to ensure maximum equipment life with trouble-free operation. For safe installation, startup and operational life of this
equipment, it is important that all involved with the equipment be well versed in proper fan safety practices and read this manual.
It is the user's responsibility to make sure that all requirements of good safety practices and any applicable safety codes are strictly
adhered to. Because of the wide variety of equipment covered in this manual, the instructions given here are general in nature.
Additional product and engineering information is available at www.tcf.com.
Refer to the safety section(s) in this manual prior to installing or servicing the fan. The most current version of this installation and maintenance
manual can be found on our website at www.tcf.com/resources/im-manuals.
Table of Contents
Overview of Centrifugal Fan Arrangements ................................2
Exploded Views ............................................................................3
Impeller Nomenclature ................................................................3
Impeller Types & Impeller Rotation .............................................4
Safety & Hazard Warnings ...........................................................5
Shipping & Receiving....................................................................5
Handling .......................................................................................6
Unit Storage .................................................................................7
Foundations and Supporting Structures ......................................8
Fan Installation, Factory Assembled Units ...................................9
Bearing Installation ....................................................................12
Safety & Bearing Lubrication Instructions .................................13
Drive Mounting ..........................................................................14
Flexible Couplings ......................................................................15
Maintenance ..............................................................................16
Centrifugal Fans
Installation, Operation & Maintenance Manual
SAFETY NOTICE
Motor Maintenance ...................................................................16
Drive Maintenance .....................................................................16
Fan Bearing Maintenance ..........................................................17
Impeller and Shaft Maintenance ...............................................17
Structural Maintenance .............................................................17
Duct Connections .......................................................................17
Optional Accessories ............................................................ 18-21
Grouting .....................................................................................22
Serial Number & Fan Type Nameplate ......................................22
Impeller Placement / Impeller Overlap ............................... 23-28
Troubleshooting Guidelines .......................................................29
Installation / Start-up Checklist ..................................................30
Fan Maintenance Log .................................................................31
Twin City Fan
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Table of Contents
Related Manuals for TCF IM-995
Summary of Contents for TCF IM-995
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Page 1: Table Of Contents
It is the user’s responsibility to make sure that all requirements of good safety practices and any applicable safety codes are strictly adhered to. Because of the wide variety of equipment covered in this manual, the instructions given here are general in nature. Additional product and engineering information is available at www.tcf.com. SAFETY NOTICE Refer to the safety section(s) in this manual prior to installing or servicing the fan. -
Page 2: Overview Of Centrifugal Fan Arrangements
IM-995 Centrifugal Fan Arrangements - Single Width, Single Inlet (SWSI) Arrangement 1 Arrangement 3 Arrangement 3F Arrangement 3SI Arrangement 4 Belt Driven or Direct Drive Belt Driven Belt Driven Belt Driven or Direct Drive Direct Drive Arrangement 4S Arrangement 4VI... -
Page 3: Exploded Views
IM-995 Exploded View - Centrifugal Fans Shaft Housing Access Hole For Bearings Impeller Sheave/Pulley Inlet Funnel Mounting Bolts Inlet Collar Belt Motor Motor Slide Base Pedestal Flanged Outlet Flange Inlet Impeller Nomenclature Impeller Front Plate Back Plate (End Ring, Shroud) -
Page 4: Impeller Types & Impeller Rotation
IM-995 SWSI Impeller Types Airfoil Backward Radial Curved BAE-SW BAF-SW BEPL BAFF BFPL BCSF BAIFE Backward Radial Forward Inclined Bladed Curved BC-SW BCVR RBOF TBNA BCIFE BCVSH TBNS LPSF BCPL NFC-SW TCBI DWDI Impeller Types Airfoil Backward Inclined Forward Curved... -
Page 5: Safety & Hazard Warnings
IM-995 Safety & Hazard Warnings For general safety practices for air moving equipment, see AMCA Bulletin 410. Twin City Fan & Blower offers many safety accessories. These safety devices include (but are not limited to) belt guards, shaft guards, inlet and discharge screens. The use and suitability of safety devices is the responsibility of the purchaser. -
Page 6: Handling
IM-995 Handling Handling of all air moving equipment should be conducted by trained personnel and be consistent with safe handling practices. Verify the lift capacity and operating condition of handling equipment. When using hoisting equipment, only qualified and trained personnel should operate the equipment. -
Page 7: Unit Storage
IM-995 Unit Storage Store the unit in an environmentally stable and protected area. During storage, the fan should not be subjected to vibration from external sources or bearing damage may occur. The unit should be reasonably protected from any accidental impacts. Cover the fan to protect coatings and to prevent any foreign material or moisture from entering the bearings, motor, inlet or discharge. -
Page 8: Foundations And Supporting Structures
IM-995 WARNING Refer to handling section prior to lifting equipment. Foundations & Supporting Structures (refer to lifting/safety section) The best means of floor mounting a fan is on a well-designed, flat, level and prepared concrete foundation. The foundation should have a mass of at least three times that of the supported assembly. Rigid foundation stiffness must be between 1x10 lbs./in. -
Page 9: Fan Installation, Factory Assembled Units
Likewise, if motors and/or drives are not supplied, the fan is tested with the factory driver. Final balancing, at the buyer’s expense, should be performed in the field after the motor and/or drives are installed. This service is available from TCF, otherwise this should be entrusted to a qualified technician. -
Page 10: Fan Installation, Disassembled Units With Split Housings
IM-995 Fan Installation – Disassembled Units With Split Housings (refer to lifting/safety section) A unit is considered “disassembled” if any component required for proper operation is shipped or supplied separately or in pieces. Reference earlier instructions concerning proper handling of fan components and general safety. Impeller rotation is important. - Page 11 IM-995 Fan Installation – Disassembled Units With Split Housings (Cont.) (refer to lifting/safety section) 6. If the impeller and shaft were shipped unassembled, you must now install the shaft in the impeller. a. First use solvent to clean the protective coating off the shaft. Check all surfaces for corrosion or nicks and clean if necessary with fine emery cloth or a stone.
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Page 12: Bearing Installation
IM-995 Bearing Installation (refer to safety section) The following section gives some general instructions on bearing installation. If bearings are to be field installed, the specific installation manual for the bearings will be provided and should be followed carefully. If provided, check the assembly drawings and bearing manufacturer's instructions for location of the fixed and expansion bearings. -
Page 13: Safety & Bearing Lubrication Instructions
IM-995 Safety & Bearing Lubrication Instructions WARNING 1. This equipment must not be operated without proper guarding of all moving parts. While performing maintenance be sure remote power switches are locked off. See AMCA Publication 410 for recommended safety practices. -
Page 14: Drive Mounting
IM-995 Drive Mounting (refer to safety section) WARNING Mount drives as follows: When working around belts and pulleys, keep hands away from 1. Slip (do not pound) proper sheave onto corresponding shaft. pinch points. Most drives utilize tapered bushings. Draw the bushing up evenly tightening in steps. -
Page 15: Flexible Couplings
IM-995 Flexible Couplings (refer to safety section) These instructions are general for the installation of several types of flexible couplings and should not be used as a substitute for more specific manufacturer’s instructions. The coupling manufacturer’s installation data is available and will give specific dimensions for alignment limits, lubricants, etc. -
Page 16: Maintenance
IM-995 Maintenance (refer to safety section) Develop a regular maintenance schedule according to your needs and the criticality of the fan. Periodic inspections, lubrication and observations of sound and vibration will help prolong the life of the fan. If changes are noted check bolt tightness, foundation integrity, cleanliness of the impeller and or motor, bearing lubrication and drive components. -
Page 17: Fan Bearing Maintenance
IM-995 Fan Bearing Maintenance (refer to safety section) Proper lubrication of the fan drive bearings helps assure maximum bearing life. All fans are equipped with decals indicating the recommended relubrication intervals for normal operating conditions. Refer to the Bearing Installation section for the lubrication schedules for ball bearings, solid pillow block spherical roller bearings and split pillow block spherical roller bearings. -
Page 18: Optional Accessories
Shaft seal application manuals are provided in Fan Engineering FE-700 available on www.tcf.com. Other seals such as stuffing boxes, mechanical seals and carbon ring seals need special attention. - Page 19 IM-995 Optional Accessories (cont.) 5. Outlet Dampers — Outlet dampers are usually provided completely assembled like the inlet dampers. The damper is bolted to the fan discharge for volume control. 6. Shaft Cooler — Also referred to as “heat slingers” or “cooling impellers,”...
- Page 20 IM-995 Optional Accessories (cont.) Oil Circulation Systems: a. Use non-detergent, turbine grade oil specified on the general accessory drawing. b. Utilize the drain ports specified on the general accessory drawing. c. There must be a slope of 15 degrees or ½" slope per foot to effectively drain the bearing and minimize leakage.
- Page 21 IM-995 Optional Accessories (cont.) Unitary Bases – Unitary bases are rigidly mounted to a foundation. Situations may arise where the base may require concrete to dampen vibration or increased stiffness. In situations where concrete must be added to the base the following guide must be utilized.
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Page 22: Grouting
IM-995 Grouting Grouting is the final installation step. If Twin City Fan & Blower service is purchased, grouting must be delayed until after the Twin City Fan & Blower inspection and vibration check. Check all shims before grouting to make sure that the fan is resting evenly on all points with anchor bolts secured to hold the shim. -
Page 23: Impeller Placement / Impeller Overlap
IM-995 Impeller Placement Model RBA Model RBR Model RBO RBA Impeller Overlap Size 0.25 0.38 0.47 0.53 0.59 0.69 0.69 RBO, RBR Impeller Gap Size 0.53 0.53 0.59 0.69 0.78 0.88 0.97 1.03 1.22 1.38 1.56 1.69 1.81 1.88 2.16 Note: On Sizes 905-911 RBO and RBR impeller is to be centered in housing. - Page 24 IM-995 Impeller Placement Models BC-SW, BAF-SW, BAE-SW, BCS, HIB, Models BC-DW, BAF-DW, BAE-DW BAV, RTF, HRT, HAF, BCV, DCV, TCBI BC-SW, BC-DW, BAF SWSI & DWDI, BCS, BCV (Class I & II), DCV Impeller Overlap Size 10.50 12.25 13.50 15.00 16.50 18.25 20.00 22.25 24.50 27.00 30.00 33.00 36.50 40.25 44.50 49.00 54.25 60.00 66.00 73.00 80.75 89.00 0.28...
- Page 25 IM-995 Impeller Placement Models FC-DW, NFC-DW Models FCV, NFC-SW FCV, FC-DW, NFC-SW, NFC-DW Impeller Gap Size Size 10.5 0.47 0.69 0.75 4.38 0.25 1.88 0.81 5.00 0.44 2.19 0.75 5.00 0.50 2.25 1.06 6.38 0.69 2.88 1.69 7.50 0.81 3.00 1.50...
- Page 26 IM-995 Impeller Placement Model TBNS Model TBNA Model TBNA "N" Series Impeller "W" Series Impeller TBNA, TBNS Impeller Gap 0.13" gap on all sizes Model TBA Model TBR TBA, TBR Impeller Gap 0.13" gap on all sizes Installation, Operation & Maintenance Manual...
- Page 27 IM-995 Impeller Placement PBW Impeller Gap Housing Size Impeller Size A (REF) 19 & 22 0.36 21 & 22 0.61 23 & 26 0.36 21 & 22 0.86 23 & 26 0.36 Note: Distance from inside surface of housing to impeller blade is constant on all sizes and arrangements.
- Page 28 IM-995 Impeller Placement Models MBO, MBW, MBR MBW, MBO, MBR Impeller Gap Size MBW 0.50 0.44 0.38 0.25 0.38 0.44 0.56 0.63 0.75 0.75 0.88 MBO 0.50 0.44 0.38 0.25 0.38 0.44 0.56 0.63 0.75 0.75 0.88 0.25 0.25 0.25 0.25 0.25 0.38 0.50 see note below Note: On Sizes 421-589 impeller is to be centered in housing.
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Page 29: Troubleshooting Guidelines
IM-995 Troubleshooting Guidelines Use current safety practices when investigating fan or system performance problems. General safe practices and performance troubleshooting guidelines can be found in AMCA Publications 410 and 202, respectively. Fan application and field measurement procedures can be found in AMCA Publications 201 and 203. -
Page 30: Installation/Start-Up Checklist
IM-995 Installation/Start-up Checklist Become familiar with the equipment by looking at the fan assembly drawing for special instructions and accessories. Initial Fan Check WARNING Inspect fan for damage Check foundation, prepare for shims Verify that proper safety precautions have been followed. -
Page 31: Fan Maintenance Log
IM-995 Fan Maintenance Log Model Number __________________________ Serial Number __________________________ Date Completed Maintenance Performed By Comments Installation, Operation & Maintenance Manual... - Page 32 Twin City Fan TWIN CITY FAN & BLOWER | WWW.TCF.COM 5959 Trenton Lane N | Minneapolis, MN 55442 | Phone: 763-551-7600 | Fax: 763-551-7601 ©2017 – 2023 Twin City Fan Companies, Ltd.