SECTION FAN COIL UNITS
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1 PART 1 GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Specification Sections, apply to this Section. B. Related Sections: The following sections contain requirements that relate to this section: 1. Section Basic Mechanical Materials and Methods 2. Section Motors 3. Section Hangers and Supports 4. Section Vibration and Seismic Controls for HVAC Piping and Equipment 5. Section Hydronic Piping 1.2 SUMMARY A. This Section includes fan-coil units with water coils for heating and cooling. B. This Section includes fan-coil units with water cooling coils. C. This Section includes large capacity fan-coil units. 1.3 SUBMITTALS A. General: Submit each item in this Article according to the Conditions of the Contract and Specification Sections. B. Product Data for each type of product specified. C. Wiring diagrams detailing wiring for power and control systems and differentiating clearly between manufacturer-installed and field-installed wiring. D. Qualification data for firms and persons specified in the "Quality Control" Article to demonstrate their capabilities and experience. Include lists of completed projects with project names and addresses, names and addresses of architects and owners, and other information specified. E. Field test reports from a qualified independent inspecting and testing agency indicating and interpreting test results relative to compliance with performance requirements of fancoil units. 1.4 QUALITY CONTROL A. Manufacturer Qualifications: Engage a firm experienced in manufacturing fan-coil units similar to those indicated for this Project and that have a record of successful in-service performance. B. Comply with ARI 440 for testing and rating units. C. Comply with ASHRAE 33 for testing air coils. Page 1 of 5
2 D. Comply with NFPA 70 for components and installation. E. Listing and Labeling: Provide products specified in this Section that are listed and labeled. 1. The Terms "Listed" and "Labeled": As defined in the National Electrical Code, Article Listing and Labeling Agency Qualifications: A "Nationally Recognized Testing Laboratory" (NRTL) as defined in OSHA Regulation EXTRA MATERIALS A. Furnish extra materials described below that match products installed, are packaged with protective covering for storage, and are identified with labels clearly describing contents. 1. Fan-Coil Unit Filters: Furnish one spare filter for each filter installed. 2. Belts: Furnish one set of belts for belt drive units. PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. United Technologies Corp; Carrier Corp. Div. 2. Trane Company (The) 3. York International Corp.; Applied Systems Div. 4. International 5. Williams 2.2 A. Provide fan coil units where shown on the Drawings. Fan coil units shall be of size, type, and capacity as scheduled; all units shall be tested and rated in accordance with ARI Standard Units shall be horizontal or vertical type with recessed, semi recessed or wall mounted cabinet as shown. Each unit shall have dimensions and design suitable for the locations shown on the Drawings. 1. NOTE: All data provided on the schedules are for units operating at medium speed. B. Units shall have a maximum sound power level of 34 db based on watts for the fourth octave band when operating at medium speed. All units shall be sound rated in accordance with ARI Standard C. Each fan coil unit shall consist of a cabinet, a fan assembly, a chilled water coil, a heating coil, a condensate drain pan, an auxiliary condensate drain pan, a filter, and a fan speed switch unless indicated otherwise. 1. Cabinets shall be constructed with 16 gauge front panels for vertical units and with 18 gauge front panels for horizontal units and with 18 gauge back panels. All panels shall be phosphorized for rust resistance and finished with baked enamel finish of color selected by the Owner. Oversized cabinets shall be Page 2 of 5
3 provided if required for making the necessary piping connections. All portions of the cabinets exposed to cold air discharge shall be provided with heavy insulation to prevent sweating. a. Type 1 cabinets shall have a fully concealed vertical wall type chassis. Units shall have top ducted discharge and front return. b. Type 2 cabinets shall have vertical floor mounted type cabinets. Units shall have top discharge and front return. c. Type 4 cabinets shall have fully recessed vertical wall type cabinets. Units shall have top ducted discharge and front return. d. Type 5 cabinets shall have surface mounted horizontal ceiling type cabinets. Units shall have front (horizontal) discharge and rear return. e. Type 7 cabinets shall have recessed horizontal ceiling type cabinets. Units shall have ducted front discharge and bottom return. f. Type 8 cabinets shall have fully concealed horizontal ceiling type cabinets. Units shall have ducted front discharge and ducted rear return. Cabinet face shall be fully accessible from below the unit. No filters will be required with this type of unit when return filter grilles are employed. 2. Fans shall be constructed of non-corrosive material and be of the forward curved single or double centrifugal type. Cabinets shall be equipped with removable fronts (bottoms) for access to the interior. Fans shall be direct drive type arranged for blow-through configuration. Motors shall be high efficiency, resilient mounted, permanently lubricated 3 speed tap wound permanent split capacitor, open type motors and shall be suitable for 115 volt 1 phase 60 hertz service. All motors shall have integral thermal overload protection. 3. Chilled water cooling coils shall be constructed of copper tubes rated for 150 (300) psig working pressure, mechanically expanded into plate type aluminum fins. Coils shall have female sweat end connections. 4. Heating coils shall be constructed of copper tubes rated for 150 (300) psig working pressure, mechanically expanded into plate type aluminum fins. Tubes shall be of minimum of 1/2-inch O.D. and shall be joined to steel headers. Coils shall be suitable for use with hot water. 5. Drain pan shall be constructed of 18 gauge galvanized steel and insulated on the under side with closed cell insulation. Auxiliary drain pan shall be insulated and have a 3/4 inch male pipe thread drain connection. 6. Filters shall be throwaway 30 percent efficiency type. 7. Each vertical unit shall be provided with a four position (off-high medium low) switch mounted inside the cabinet, which shall be easily accessible for operation from outside the cabinet. This switch shall also act as a disconnect switch. In addition, a factory mounted disconnect switch shall be provided inside the unit. 8. Each horizontal unit shall be provided with a wall mounted four position (off high medium low) switch shipped loose for field installation. In addition, a factory mounted disconnect switch shall be provided inside the unit. 9. Chilled water coils must be designed with a 16 to 18 temperature differential. D. Each unit shall be furnished with factory formed piping to suit control valves. Vertical units shall be furnished with cabinet levelers; horizontal units shall be provided with spring vibration isolators. 2.3 LARGE CAPACITY Page 3 of 5
4 A. Provide fan coil units where shown on the Drawings. Units shall be of size and capacity as scheduled. B. Each fan coil unit shall consist of a water cooling coil, a drain pan assembly, and a centrifugal fan with drive mounted in a common cabinet for independent air delivery from a single unit. Units shall be complete except for controls. 1. Casings shall be constructed of 16 gauge steel, phosphorized to assure paint adherence and finished with baked enamel. Casings shall be insulated with minimum 3/4 inch fire proof, odorless fiber glass material to prevent condensation. 2. Water coils shall be of a multiple row design with as indicated with highly efficient fins. Aluminum fins shall be mechanically bonded to 5/8 inch O.D. seamless copper tubes. All coils shall be specifically designed and circuited for water use. All coils shall be suitable for 200 psig working pressure and shall be tested at 300 psi. Sweat type coil connections shall be provided. 3. Fans shall be forward curved, centrifugal blower type fans equipped with heavy duty adjustable V belt drive. The fan shaft shall be supported by permanently lubricated bearings which shall be designed for long life. All fans shall be dynamically balanced. All units shall have a single fan. 4. Drain pans shall be integrally attached to coil casings and shall be complete with threaded pipe drain connection. All pans shall be galvanized for corrosion resistance and cover the entire coil length. C. Filters shall be supplied separately. D. Motors less than 1/2 horsepower shall be two pole single phase motors suitable for 115 volt, 1 phase, 60 hertz electrical power. All motors shall have 10% voltage utilization range and shall be wired to a unit mounted junction box. Motors shall be designed for long life and shall include internal thermal overload protection. E. Motors 1/2 horsepower and larger shall be as specified in Motors Section. Motors shall also be provided with combination starters as specified in Motors Section. F. Units shall be provided with spring vibration isolators. G. Each fan coil unit which is not provided with a combination starter shall be provided with a manual motor starter of ample capacity to disconnect unit. This starter shall be shipped loose and shall also serve as a disconnect switch. PART 3 - EXECUTION 3.1 EXAMINATION A. Examine substrates and supports to receive fan-coil units for compliance with requirements for installation tolerances and other conditions affecting performance of fan-coil units. Do not proceed with installation until unsatisfactory conditions have been corrected. 3.2 INSTALLATION Page 4 of 5
5 A. Install fan-coil units as indicated, to comply with manufacturer's written instructions and NFPA 90A. B. Connect fan-coil units and components to wiring systems and to ground as indicated and instructed by manufacturer. Tighten connectors and terminals, including screws and bolts, according to equipment manufacturer's published torque-tightening values for equipment connectors. Where manufacturer's torquing requirements are not indicated, tighten connectors and terminals according to tightening requirements specified in UL 486A. C. Connect fan-coil units to hydronic piping according to Section "Hydronic Piping." Provide shutoff valve and union or flange at each connection. D. Fan coil units installed above the ceiling grid level shall have all returns ducted to ceiling grid level with filters installed at ceiling grid. 3.3 FIELD QUALITY CONTROL A. Testing: After installing fan-coil units and after electrical circuitry has been energized, demonstrate product capability and compliance with requirements. B. Remove and replace malfunctioning units with new units, and retest. 3.4 CLEANING A. Replace filters in each fan-coil unit. 3.5 START UP SERVICE A. Startup Services: Engage a factory-authorized service representative to provide startup service. B. Operate fan motor to verify proper rotation. C. Operate electric heating elements through each stage to verify proper operation and electrical connections. D. Test and adjust controls and safeties. Replace damaged or malfunctioning controls and equipment. END OF SECTION Page 5 of 5
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