SQUARE INLINE CENTRIFUGAL FANS Fa n - tcf.com

1 INDUSTRIAL PROCESS AND. COMMERCIAL VENTILATION SYSTEMS. Twin City Fan SQUARE INLINE . CENTRIFUGAL . Twin City Fan fans . DSI | BSI. CATALOG 4205 | OCTOBER 2018 SQUARE INLINE . CENTRIFUGAL fans . Overview DSI | BSI. Twin City Fan & Blower's Model DSI direct drive and Model BSI belt driven SQUARE INLINE fans are specifically designed for duct applications handling relatively clean air, including supply, exhaust and return air systems. These fans offer high efficiency and quiet operation in a compact design that can be mounted in any position (horizontal, vertical or angular). Duct collars are provided for easy mounting without the need for SQUARE to round duct transitions.

2 The units can be easily serviced through the side access panels without removing duct connections. SQUARE INLINE CENTRIFUGAL units feature high efficient, GridSmart non-overloading, backward inclined CENTRIFUGAL impellers precisely matched to a spun venturi. All impellers TM. DSI are statically and dynamically balanced. Units are ECDirect MotorsDrive manufactured under strict quality assurance standards to insure cataloged performance and years of maintenance- free operation. SQUARE INLINE fans are not intended for Now Available with outdoor applications. GridSmart EC Motors TM. Typical Applications Include General HVAC (exhaust, filtration, return and supply, air of commercial buildings), Air Pollution Control, Airport see page 8 Exhaust, Automotive, Fertilizer, Food & Beverage, Laboratory Exhaust, Metal & Mineral Processing, Office Exhaust, Restroom Exhaust, Warehouse Exhaust and GridSmart TM Water Treatment Impeller Types Backward Inclined Twin City Fan Optional Construction GridSmart TM.

3 All DSI and BSI models are UL/cUL 705 listed, for electrical, File No. E158680. Spark Resistant Construction (Type B and C), Easy Access Construction Certifications Twin City Fan Twin City Fan & Blower certifies that the Models DSI and BSI. AMCA Sound/Air and FEG, UL 705 Listed for Electrical, shown herein are licensed to bear the AMCA Seal. The ratings OSHPD Seismic Preapproval per OSP-0271-10. shown are based on tests and procedures performed in accordance with AMCA Publication 211 and AMCA Publication 311 and comply with the requirements of the AMCA Certified Ratings Program. Fan Efficiency Grade (FEG) certification applies to Model DSI. Sizes 135A, 135AE, 150A, 150AE, 150AN, 150 ANE, 165A, 165AE, 165AN and 165 ANE and Model BSI, Sizes 080A, 090A, 100A, For complete product performance, drawings 120A, 120 AHP, 135A, 135 AHP, 150A, 150 AHP, 165A, 165 AHP, and available accessories, download our 180A, 180 AHP, 210A, 210 AHP, 225A, 225 AHP, 245A, 245 AHP, Fan Selector program at 270A, 270 AHP, 300A, 300 AHP, 330A, 330 AHP, 365A, 365 AHP, 402A, 402 AHP.

4 2 TWIN CITY FAN - CATALOG 4205. SQUARE INLINE . CENTRIFUGAL fans . Overview DSI | BSI. Model DSI. Available in 10 sizes from 080 through 165. Airflow to 5,800 CFM. Static pressure to 2" General HVAC. (90 Degree Turn). Model BSI. Available in 29 sizes from 080 through 402. Airflow to 27,400 CFM. Static pressure to " General HVAC. (Straight INLINE ). 3. CONSTRUCTION FEATURES. Housings - Housing assembly features heavy-gauge Impeller - Backward inclined non-overloading, all- galvanized steel construction aluminum impeller and hub statically and dynamically balanced to assure long life and quiet operation. Removable Side Panels - Removable side panels provide easy access for service and maintenance without Mounting Brackets - Galvanized steel mounting the need to remove duct connections.

5 Complete removal brackets for easy mounting in horizontal or vertical position. of the power assembly is also possible through side access panels. Side panels can provide a 90-degree side Pulleys - Heavy-duty cast iron adjustable pulleys to discharge. Requires optional side discharge accessory. permit speed variation (Model BSI). Duct Collars - Duct collars provide ready attachment Shaft - Precision ground and polished with a first critical to ductwork and eliminate the need for SQUARE to round speed of at least 125% of the fan's maximum operating duct transitions. speed (Model BSI). Belt Tube/ bearing Cover - Constructed of heavy Bearings - All models are furnished with prelubricated gauge galvanized steel, the belt tube and bearing cover cast iron pillow block bearings with zerk fittings, designed enclose the belts, fan sheave and bearings within the for an average life (L-50) of 500,000 hours or more at airstream (Model BSI).

6 Maximum cataloged operating speeds (Model BSI). Drive Frame - Motor and drive frame are constructed Disconnect Switch - Mounted and prewired NEMA 1. of heavy gauge galvanized steel. The pivoting motor base disconnect switch provided as standard for servicing the makes for simple belt tensioning (Model BSI). unit without the danger of an accidental start. 4 TWIN CITY FAN - CATALOG 4205. DISCONNECT SWITCHES. Disconnect switches provide positive electrical shutoff during fan cleaning or maintenance. NEMA 1 Disconnect Switch (Standard). A NEMA 1 disconnect switch is available shipped loose for field mounting and wiring or factory mounted and wired with ODP or TEFC motors.

7 NEMA 1 Disconnect Switch NEMA 3R Disconnect Switch A NEMA 3R, rain proof, disconnect is available shipped loose for field mounting and wiring or factory mounted and wired externally. NEMA 4 Disconnect Switch A NEMA 4, water and dust tight, disconnect is available shipped loose for field mounting and wiring or factory mounted and wired externally. NEMA 3R Disconnect Switch NEMA 7/9 Disconnect Switch A NEMA 7/9 disconnect switch is recommended on fans with explosion proof motors. The NEMA 7/9 switch is designed for use with fans operating in hazardous environments. Available shipped loose for field mounting and wiring. (Not shown.). NEMA 4 Disconnect Switch Twin City Fan DSI.

8 Direct Drive 5. OPTIONS/ACCESSORIES. 2 1. 4. 3. 6. 5. 1 Belt Guard is a formed galvanized steel guard 5 NEMA 3R rain proof safety disconnect switch is available to cover the drive assembly on Model BSI. available for positive electrical shutoff of the fan and Belt guard is offered in lieu of motor cover. the protection of service personnel. 2 Motor Cover is a formed galvanized steel cover 6 Backdraft Dampers, with automatic or motorized available on Model BSI to completely cover the motor operation, feature felt-edged damper blades for quiet and drives. Motor cover serves as OSHA belt guard. operation. Damper frames are constructed of galvanized steel and blades are constructed of 26-gauge aluminum.

9 3 Extended Lube Lines Exterior mounting zerk All dampers ship loose for field mounting in ductwork. fittings are available with lines to the fan shaft bearings (Model BSI) for relubrication from outside the unit. Motorized dampers are recommended for low CFM. applications to assure unrestricted airflow. Motorized 4 Vibration Isolators Spring or neoprene type vibration dampers are available with 115, 208, 230, 460, 575. isolators are available for ceiling suspended or floor or 24 volt service. End switches are available. See mounted installations. dimensional data for sizing. 6 TWIN CITY FAN - CATALOG 4205. OPTIONS/ACCESSORIES. 1. 2. 3. 1 Variable Speed Control Variable speed control is 3 Outlet Guard Inlet and outlet guards are available an optional accessory on all DSI models, to allow the for all models.

10 Guards mount inside the unit and do adjustment of airflow for system balancing . Variable not interfere with the attachment of ductwork. speed controllers are solid-state (Tri-ac) design and are designed to start the motor on high speed for better startup characteristics. Variable speed controls can be shipped separately, factory installed, or field installed on the unit at a later date. Motor must be ODP 115V, PSC or shaded pole type. Other Accessories Include: 2 Filter Box A filter box containing two inch aluminum Special Coatings wire mesh, removable and washable filters is available Insulated Housings for attachment to the fan inlet side. The filter box Aluminum Construction is constructed of galvanized steel, with duct collars Stainless Steel Hardware for easy mounting and removable side panels for NEMA 4 & 7/9 Disconnect Switches easy filter cleaning or replacement.