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HomeMy WebLinkAboutH003 - HVAC SpecificationsSECTION 23 07 13 -DUCT INSULATION PART 1 - GENERAL 1.1 SUBMITTALS A. Product Data: For each type of product indicated. Include thermal conductivity, water-vapor permeance thickness, and jackets (both factory-and field-applied if any). Submit detail application of protective shields, saddles, and inserts at hangers for each type of insulation, hangers, elbows, fittings, dampers, specialties and flanges for each type of insulation. 1.2 QUALITY ASSURANCE A. Surface-Burning Characteristics: For insulation and related materials, as determined by testing identical products according to ASTM E 84, by a testing agency acceptable to authorities having jurisdiction. 1. Insulation Installed Indoors: Flame-spread index of 25 or less, and smoke-developed index of 50 or less. 2. Insulation Installed Outdoors: Flame-spread index of 75 or less, and smoke-developed index of 150 or less. PART 2 - PRODUCTS 2.1 INSULATION MATERIALS A. Mineral-Fiber Blanket Insulation: Mineral or glass fibers bonded with a thermosetting resin. Comply with ASTM C 553, Type III with factory-applied FSK jacket. Factory-applied jacket requirements are specified in "Factory-Applied Jackets" Article. 1. Products: Subject to compliance with requirements, provide one of the following: a. CertainTeed Corp.; SoftTouch Duct Wrap. b. Johns Manville; Microlite. c. Knauf Insulation; Friendly Feel Duct Wrap. e. Owens Corning; SOFTR All-Service Duct Wrap. B. Mineral-Fiber Board Insulation: Mineral or glass fibers bonded with a thermosetting resin. Comply with ASTM C 612, Type IA or Type IB. For duct and plenum applications, provide insulation with factory-applied FSK jacket. Factory-applied jacket requirements are specified in "Factory-Applied Jackets" Article. 1. Products: Subject to compliance with requirements, provide one of the following: a. CertainTeed Corp.; Commercial Board. b. Fibrex Insulations Inc.; FBX. c. Johns Manville; 800 Series Spin-Glas. d. Knauf Insulation; Insulation Board. e. Owens Corning; Fiberglas 700 Series. PART 3 - EXECUTION 3.1 PREPARATION A. Surface Preparation: Clean and dry surfaces to receive insulation. Remove materials that will adversely affect insulation application. Ensure all systems to be insulated have been tested and operating satisfactorily according to the requirements listed in the document prior to proceeding. 3.2 GENERAL INSTALLATION REQUIREMENTS A. Seal joints, seams, and penetrations in insulation at hangers, supports, anchors, and other projections with vapor-barrier mastic. 1. Install insulation continuously through hangers and around anchor attachments. 2. For insulation application where vapor barriers are indicated, extend insulation on anchor legs from point of attachment to supported item to point of attachment to structure. Taper and seal ends at attachment to structure with vapor-barrier mastic. 3. Install insert materials and install insulation to tightly join the insert. Seal insulation to insulation inserts with adhesive or sealing compound recommended by insulation material manufacturer. B. Repair damaged insulation facings by applying same facing material over damaged areas. Extend patches at least 4 inches (100 mm) beyond damaged areas. Adhere, staple, and seal patches similar to butt joints. C. Insulation Installation at Interior Wall and Partition Penetrations (That Are Not Fire Rated): Install insulation continuously through walls and partitions. D. Insulation Installation at Fire-Rated Wall and Partition Penetrations (with Fire or Fire/Smoke dampers): Terminate insulation at fire damper sleeves for fire-rated wall and partition penetrations. Externally insulate damper sleeves to match adjacent insulation and overlap duct insulation at least 2 iinches (50 mm). Walls that are not required to have dampers shall be treated the same as non-rated wall and have continuous duct insulation. 1. Comply with requirements in Division 07 Section "Penetration Firestopping" firestopping and fire-resistive joint sealers. E. Blanket Insulation Installation on Ducts and Plenums: Secure with adhesive and insulation pins. 1. Install either capacitor-discharge-weld pins and speed washers or cupped-head, capacitor-discharge-weld pins on sides and bottom of horizontal ducts and sides of vertical ducts as follows: a. On duct sides with dimensions 18 inches (450 mm) and smaller, place pins along longitudinal centerline of duct. Space 3 inches (75 mm) maximum from insulation end joints, and 16 inches (400 mm) o.c. b. On duct sides with dimensions larger than 18 inches (450 mm), place pins 16 inches (400 mm) o.c. each way, and 3 inches (75 mm) maximum from insulation joints. Install additional pins to hold insulation tightly against surface at cross bracing. c. Pins may be omitted from top surface of horizontal, rectangular ducts and plenums. d. Do not over-compress insulation during installation. e. Impale insulation over pins and attach speed washers. f. Cut excess portion of pins extending beyond speed washers or bend parallel with insulation surface. Cover exposed pins and washers with tape matching insulation facing. 2. For ducts and plenums with surface temperatures below ambient, install a continuous unbroken vapor barrier. Create a facing lap for longitudinal seams and end joints with insulation by removing 2 inches (50 mm) from one edge and one end of insulation segment. Secure laps to adjacent insulation section with 1/2-inch (13-mm) outward-clinching staples, 1 inch (25 mm) o.c. Install vapor barrier consisting of factory-or field-applied jacket, adhesive, vapor-barrier mastic, and sealant at joints, seams, and protrusions. a. Repair punctures, tears, and penetrations with tape or mastic to maintain vapor-barrier seal. b. Install vapor stops for ductwork and plenums operating below 50 deg. F (10 deg. C) at 18-foot (5.5-m) intervals. Vapor stops shall consist of vapor-barrier mastic applied in a Z-shaped pattern over insulation face, along butt end of insulation, and over the surface. Cover insulation face and surface to be insulated a width equal to two times the insulation thickness, but not less than 3 inches (75 mm). 3. Insulate duct stiffeners, hangers, and flanges that protrude beyond insulation surface with 6-inch-(150-mm-) wide strips of same material used to insulate duct. Secure on alternating sides of stiffener, hanger, and flange with pins spaced 6 inches (150 mm) o.c. 3.3 INDOOR DUCT AND PLENUM INSULATION SCHEDULE A. Concealed supply-air duct insulation shall be one of the following: 1. Mineral-Fiber Blanket: 2 inches thick and 1.0-lb/cu. ft. nominal density. Increase thickness or density as required to achieve R-6.0 installed. 2. Mineral-Fiber Board: 2 inches thick and 2-lb/cu. ft. nominal density. Increase thickness or density as required to achieve R-6.0 installed. B. Concealed return-air duct insulation shall be the following: 1. Mineral-Fiber Blanket: 1-1/2 inches thick and 0.75-lb/cu. ft. nominal density. Increase thickness or density as required to achieve R-4.5 installed. 2. Mineral-Fiber Board: 1-1/2 inches thick and 2-lb/cu. ft. nominal density. Increase thickness or density as required to achieve R-4.5 installed. END SECTION 23 07 13 SPECIFICATION 230900 - INSTRUMENTATION AND CONTROL FOR HVAC PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. This Section includes control equipment for HVAC systems and components, including control components for terminal heating and cooling units not supplied with factory-wired controls. 1.3 SYSTEM PERFORMANCE A. Comply with the following performance requirements: 1. Existing Building Management System: System to remain. New devices shall tie-into existing system. Communication speed shall be consistent with existing system capabilities. 2. Reporting Accuracy and Stability of Control: Report values and maintain measured variables within tolerances as follows: a. Water Temperature: Plus or minus 1 deg. F (0.5 deg.C). b. Water Flow: Plus or minus 5 percent of full scale. c. Water Pressure: Plus or minus 2 percent of full scale. d. Space Temperature: Plus or minus 1 deg. F (0.5 deg. C). e. Ducted Air Temperature: Plus or minus 1 deg. F (0.5 deg. C). f. Airflow (Measuring Stations): Plus or minus 5 percent of full scale. j. Airflow (Terminal): Plus or minus 10 percent of full scale. k. Air Pressure (Ducts): Plus or minus 0.1-inch wg (25 Pa). 1.4 SUBMITTALS A. Product Data: Include manufacturer's technical literature for each control device. Indicate dimensions, capacities, performance characteristics, electrical characteristics, finishes for materials, and installation and startup instructions for each type of product indicated. 1. DDC System Hardware: Bill of materials of equipment indicating quantity, manufacturer, and model number. Include technical data for operator workstation equipment, interface equipment, control units, transducers/transmitters, sensors, actuators, valves, relays/switches, control panels, and operator interface equipment. 2. Controlled Systems: Instrumentation list with element name, type of device, manufacturer, model number, and product data. Include written description of sequence of operation including schematic diagram. B. Shop Drawings: Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection. 1. Bill of materials of equipment indicating quantity, manufacturer, and model number. 2. Schematic flow diagrams showing fans, pumps, coils, dampers, valves, and control devices. 3. Wiring Diagrams: Power, signal, and control wiring. 4. Details of control panel faces, including controls, instruments, and labeling. 5. Written description of sequence of operation. 6. Schedule of dampers including size, leakage, and flow characteristics. 7. Schedule of valves including flow characteristics. 8. DDC System Hardware: a. Wiring diagrams for control units with termination numbers. b. Schematic diagrams and floor plans for field sensors and control hardware. c. Schematic diagrams for control, communication, and power wiring, showing trunk data conductors and wiring between operator workstation and control unit locations. SPECIFICATION 230900 -INSTRUMENTATION AND CONTROL FOR HVAC (cont.) 9. Controlled Systems: a. Schematic diagrams of each controlled system with control points labeled and control elements graphically shown, with wiring. b. Scaled drawings showing mounting, routing, and wiring of elements including bases and special construction. c. Written description of sequence of operation including schematic diagram. d. Points list. 1.5 CLOSEOUT SUBMITTALS A. Operation and Maintenance Data: For HVAC instrumentation and control system to include in emergency, operation, and maintenance manuals. In addition to items specified in Division 01 Section "Operation and Maintenance Data," include the following: 1. Interconnection wiring diagrams with identified and numbered system components and devices. 1.6 QUALITY ASSURANCE A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use. B. Comply with ASHRAE 135 BACnet for DDC system components. Provide LONworks where the existing facility utilizes that communication protocol. 1.7 DELIVERY, STORAGE, AND HANDLING A. Factory-Mounted Components: Where control devices specified in this Section are indicated to be factory mounted on equipment, arrange for shipping of control devices to equipment manufacturer. B. System Software: Update to latest version of software at Project completion. 1.8 COORDINATION A. Coordinate location of thermostats, humidistats, and other exposed control sensors with plans and room details before installation. B. Coordinate equipment with Division 26 Section "Panelboards" to achieve compatibility with starter coils and annunciation devices. C. Coordinate equipment with Division 26 Section "Motor-Control Centers" to achieve compatibility with motor starters, variable frequency drives, and annunciation devices. PART 2 - PRODUCTS 2.1 CONTROL SYSTEM A. Manufacturers: Confirm allowable manufacturer/installer with owner. Manufacturer is based on the facility where the work is to occur: B. Control system shall consist of sensors, indicators, actuators, final control elements, interface equipment, other apparatus, and accessories to control mechanical systems. C. Control system shall consist of sensors, indicators, actuators, final control elements, interface equipment, other apparatus, accessories, and software connected to distributed controllers operating in multiuser, multitasking environment on token-passing network and programmed to control mechanical systems. An operator workstation permits interface with the network via dynamic color graphics with each mechanical system, building floor plan, and control device depicted by point-and-click graphics. 2.2 DDC EQUIPMENT A. Control Units: Modular, comprising processor board with programmable, nonvolatile, random-access memory; local operator access and display panel; integral interface equipment; and backup power source. 1. Units monitor or control each I/O point; process information; execute commands from other control units, devices, and operator stations; and download from or upload to operator workstation or diagnostic terminal unit. 2. Stand-alone mode control functions operate regardless of network status. Functions include the following: a. Global communications. b. Discrete/digital, analog, and pulse I/O. c. Monitoring, controlling, or addressing data points. d. Software applications, scheduling, and alarm processing. e. Testing and developing control algorithms without disrupting field hardware and controlled environment. 3. Standard Application Programs: a. Electric Control Programs: Demand limiting, duty cycling, automatic time scheduling, start/stop time optimization, night setback/setup, on-off control with differential sequencing, staggered start, anti-short cycling, PID control, DDC with fine tuning, and trend logging. b. HVAC Control Programs: Optimal run time, supply-air reset, and enthalpy switchover. d. Programming Application Features: Include trend point; alarm processing and messaging; weekly, monthly, and annual scheduling; run-time totalization. e. Remote communications. f. Maintenance management. g. Units of Measure: Inch-pound and SI (metric). 4. Local operator interface provides for download from or upload to operator workstation or diagnostic terminal unit. 5. ASHRAE 135 BACnet Compliance: Control units shall use ASHRAE 135 protocol and communicate using ISO 8802-3 (Ethernet) datalink/physical layer protocol. Utilize LONworks where the existing facility utilizes that communication protocol. B. Local Control Units: Modular, comprising processor board with electronically programmable, nonvolatile, read-only memory; and backup power source. 1. Units monitor or control each I/O point, process information, and download from or upload to operator workstation or diagnostic terminal unit. 2. Stand-alone mode control functions operate regardless of network status. Functions include the following: a. Global communications. b. Discrete/digital, analog, and pulse I/O. c. Monitoring, controlling, or addressing data points. 3. Local operator interface provides for download from or upload to operator workstation or diagnostic terminal unit. 4. ASHRAE 135 BACnet Compliance: Control units shall use ASHRAE 135 protocol and communicate using ISO 8802-3 (Ethernet) datalink/physical layer protocol. Utilize LONworks where the existing facility utilizes that communication protocol. C. I/O Interface: Hardwired inputs and outputs may tie into system through controllers. Protect points so that shorting will cause no damage to controllers. 1. Binary Inputs: Allow monitoring of on-off signals without external power. 2. Pulse Accumulation Inputs: Accept up to 10 pulses per second. 3. Analog Inputs: Allow monitoring of low-voltage (0-to 10-V dc), current (4 to 20 mA), or resistance signals. 4. Binary Outputs: Provide on-off or pulsed low-voltage signal, selectable for normally open or normally closed operation. 5. Analog Outputs: Provide modulating signal, either low voltage (0-to 10-V dc) or current (4 to 20 mA). D. Power Supplies: Transformers with Class 2 current-limiting type or overcurrent protection; limit connected loads to 80 percent of rated capacity. DC power supply shall match output current and voltage requirements and be full-wave rectifier type with the following: 1. Output ripple of 5.0 mV maximum peak to peak. 2. Combined 1 percent line and load regulation with 100-mic.sec. response time for 50 percent load changes. 3. Built-in overvoltage and overcurrent protection and be able to withstand 150 percent overload for at least 3 seconds without failure. E. Power Line Filtering: Internal or external transient voltage and surge suppression for workstations or controllers with the following: 1. Minimum dielectric strength of 1000 V. 2. Maximum response time of 10 nanoseconds. 3. Minimum transverse-mode noise attenuation of 65 dB. 4. Minimum common-mode noise attenuation of 150 dB at 40 to 100 Hz. 2.3 ELECTRONIC SENSORS A. Description: Vibration and corrosion resistant; for wall, immersion, or duct mounting as required. B. Temperature Sensors: 1. Duct sensors shall utilize averaging elements, 1000 OHM nickel Resistance Temperature Detectors (RTD) having an accuracy of ±0.5 deg. F. C. Space Sensors: 1. Space sensors located in private offices, conference rooms, other areas deemed “non-public” or as noted on the drawings shall have exposed external set-point adjustment and digital LCD display capable of displaying setpoint and actual sensed temperature. 2. Set-point adjustment to be a maximum plus and minus 4 degrees from the null setpoint programmed through the DDC system. Comply with facility standard for existing facilities. 3. Space sensors may be (RTD) 1,000 Ohm nickel with an accuracy of ±0.5 deg. F. 4. Space sensor shall be of a neutral color (white, or other customer approved color) unless noted otherwise on the Drawings. Coordinate and match other devices in the vicinity. 5. Provide insulating bases for all sensors located on exterior walls and on exterior column wraps. Foam seal cavity and junction box prior to installing insulating base. 6. Space sensors with occupant set-point adjustment shall be adjustable from the operator’s work station as to the deadband of adjustability allowed to the occupants. 2.4 ACTUATORS A. Electric Motors: Size to operate with sufficient reserve power to provide smooth modulating action or two-position action. 1. Comply with requirements in Division 23 Section "Common Motor Requirements for HVAC Equipment." 2. Permanent Split-Capacitor or Shaded-Pole Type: Gear trains completely oil immersed and sealed. Equip spring-return motors with integral spiral-spring mechanism in housings designed for easy removal for service or adjustment of limit switches, auxiliary switches, or feedback potentiometer. 3. Non-spring-Return Motors for Dampers Larger Than 25 Sq. Ft. (2.3 sq. m): Size for running torque of 150 in. x lbf (16.9 N x m) and breakaway torque of 300 in. x lbf (33.9 N x m). 4. Spring-Return Motors for Dampers Larger Than 25 Sq. Ft. (2.3 sq. m): Size for running and breakaway torque of 150 in. x lbf (16.9 N x m). B. Electronic Actuators: Direct-coupled type designed for minimum 60,000 full-stroke cycles at rated torque. 1. Manufacturers: a. Belimo, Inc. b. Honeywell c. Johnson Controls, Inc. d. Siemens 2. Control valve actuators: a. Size for valve close off at 150 percent of total system (head) pressure for two-way valves and 100 percent of pressure differential across the valve or 100 percent of total system (pump) head differential pressure for three-way valves. Chilled water pressure is approximately 150 psig. Size valves and actuators accordingly. b. Coupling: Directly couple and mount to valve stem and shaft ISO style direct-coupled mounting pad. c. Shall meet all the requirements of 2.15.B Electronic Actuators. 3. Coupling: V-bolt dual nut clamp with a V-shaped, toothed cradle. 4. Mounting: Actuators shall be direct shaft mount type. Actuators shall be capable of being mechanically and electrically paralleled to increase torque if required. 5. Overload protected electronically throughout rotation. 6. Fail safe operation: Mechanical, spring return mechanism. 7. Power requirements (spring return): 24 VAC, maximum 15 VA at 24 VAC or 8 W at 24 VDC. 8. Proportional actuators shall be fully programmable through an EEPROM without the use of actuator mounted switches. 9. Temperature rating: -22 deg. F to +122 deg. F. 10. Housing: Minimum requirement NEMA Type 2/IP54 mounted in any orientation. NEMA 4/4X (IP67) required for outdoor applications. 11. Agency listings: ISO 9001 or UL. 12. The manufacturer shall warrant all components for a period of 5 years from the date of production with the first two years unconditional. 13. All actuators shall have external adjustable stops to limit the travel in either direction and a gear release to allow manual positioning. SPECIFICATION 230900 -INSTRUMENTATION AND CONTROL FOR HVAC (cont.) 2.5 CONTROL CABLE A. Electronic and fiber-optic cables for control wiring are specified in Division 27 Section "Communications Horizontal Cabling." B. All wiring shall be plenum rated cabling. PART 3 - EXECUTION END of SECION 2309000 SECTION 233113 - METAL DUCTS PART 1 - GENERAL 1.1 SUBMITTALS A. Product Data: For each type of the following products: 1. Sealants and gaskets. 2. Seismic-restraint devices. B. Shop Drawings: 1. Fabrication, assembly, and installation, including plans, elevations, sections, components, and attachments to other work. 2. Factory-and shop-fabricated ducts and fittings. 3. Duct layout indicating sizes, configuration, liner material, and static-pressure classes. 4. Elevation of top of ducts. 5. Dimensions of main duct runs from building grid lines. 6. Fittings. 7. Reinforcement and spacing. 8. Seam and joint construction. 9. Penetrations through fire-rated and other partitions. 10. Equipment installation based on equipment being used on Project. 11. Locations for duct accessories, including dampers, turning vanes, and access doors and panels. 12. Hangers and supports, including methods for duct and building attachment[, seismic restraints,] and vibration isolation. C. Coordination Drawings: Plans, drawn to scale, on which the following items are shown and coordinated with each other, using input from installers of the items involved: 1. Duct installation in congested spaces, indicating coordination with general construction, building components, and other building services. Indicate proposed changes to duct layout. 2. Suspended ceiling components. 3. Structural members to which duct will be attached. 4. Size and location of initial access modules for acoustical tile. 5. Penetrations of smoke barriers and fire-rated construction. 6. Items penetrating finished ceiling including the following: a. Lighting fixtures. b. Air outlets and inlets. c. Speakers. d. Sprinklers. e. Access panels. f. Perimeter moldings. 2.1 SINGLE-WALL RECTANGULAR DUCTS AND FITTINGS A. General Fabrication Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" based on indicated static-pressure class unless otherwise indicated. D. Elbows, Transitions, Offsets, Branch Connections, and Other Duct Construction: Select types and fabricate according to SMACNA's "HVAC Duct Construction Standards -Metal and Flexible," Chapter 4, "Fittings and Other Construction," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards -Metal and Flexible." 2.2 SINGLE-WALL ROUND AND FLAT-OVAL DUCTS AND FITTINGS A. General Fabrication Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 3, "Round, Oval, and Flexible Duct," based on indicated static-pressure class unless otherwise indicated. 2.3 SHEET METAL MATERIALS A. General Material Requirements: Comply with SMACNA's "HVAC Duct Construction Standards -Metal and Flexible" for acceptable materials, material thicknesses, and duct construction methods unless otherwise indicated. Sheet metal materials shall be free of pitting, seam marks, roller marks, stains, discolorations, and other imperfections. B. Galvanized Sheet Steel: Comply with ASTM A 653/A 653M. 1. Galvanized Coating Designation: G90 (Z275). 2. Minimum sheetmetal gauge used shall not be less than 26 gauge. 2.4 SEALANT AND GASKETS A. General Sealant and Gasket Requirements: Surface-burning characteristics for sealants and gaskets shall be a maximum flame-spread index of 25 and a maximum smoke-developed index of 50 when tested according to UL723; certified by an NRTL. B. Water-Based Joint and Seam Sealant: 1. Application Method: Brush on or spray on. 2. Solids Content: Minimum 65 percent. 3. Shore A Hardness: Minimum 20. 4. Water resistant. 5. Mold and mildew resistant. 6. VOC: Maximum 75 g/L (less water). 7. Maximum Static-Pressure Class: 10-inch wg (2500 Pa), positive and negative. 8. Service: Indoor or outdoor. 9. Substrate: Compatible with galvanized sheet steel (both PVC coated and bare), stainless steel, or aluminum sheets. C. Flanged Joint Sealant: Comply with ASTM C 920. 1. General: Single-component, acid-curing, silicone, elastomeric. 2. Type: S. 3. Grade: NS. 4. Class: 25. 5. Use: O. 6. For indoor applications, sealant shall have a VOC content of 250 g/L or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24). 7. Sealant shall comply with the testing and product requirements of the California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers." D. Flange Gaskets: Butyl rubber, neoprene, or EPDM polymer with polyisobutylene plasticizer. 2.5 HANGERS AND SUPPORTS A. Hanger Rods for Noncorrosive Environments: Cadmium-plated steel rods and nuts. B. Hanger Rods for Corrosive Environments: Electrogalvanized, all-thread rods or galvanized rods with threads painted with zinc-chromate primer after installation. C. Strap and Rod Sizes: Comply with SMACNA's "HVAC Duct Construction Standards -Metal and Flexible," Table 5-1 (Table 5-1M), "Rectangular Duct Hangers Minimum Size," and Table 5-2, "Minimum Hanger Sizes for Round Duct." D. Duct Attachments: Sheet metal screws, blind rivets, or self-tapping metal screws; compatible with duct materials. PART 3 - EXECUTION 3.1 DUCT INSTALLATION A. Drawing plans, schematics, and diagrams indicate general location and arrangement of duct system. Indicated duct locations, configurations, and arrangements were used to size ducts and calculate friction loss for air-handling equipment sizing and for other design considerations. Install duct systems as indicated unless deviations to layout are approved on Shop Drawings and Coordination Drawings. B. Install ducts according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" unless otherwise indicated. C. Install round and flat-oval ducts in maximum practical lengths. D. Install ducts with fewest possible joints. E. Install factory-or shop-fabricated fittings for changes in direction, size, and shape and for branch connections. F. Unless otherwise indicated, install ducts vertically and horizontally, and parallel and perpendicular to building lines. G. Install ducts close to walls, overhead construction, columns, and other structural and permanent enclosure elements of building. H. Install ducts with a clearance of 1 inch (25 mm), plus allowance for insulation thickness. I. Route ducts to avoid passing through transformer vaults and electrical equipment rooms and enclosures. J. Where ducts pass through non-fire-rated interior partitions and exterior walls and are exposed to view, cover the opening between the partition and duct or duct insulation with sheet metal flanges of same metal thickness as the duct. Overlap openings on four sides by at least 1-1/2 inches (38 mm). K. Where ducts pass through fire-rated interior partitions and exterior walls, install fire dampers. Comply with requirements in Division 23 Section "Air Duct Accessories" for fire and smoke dampers. L. Protect duct interiors from moisture, construction debris and dust, and other foreign materials. Comply with SMACNA's "IAQ Guidelines for Occupied Buildings Under Construction," Appendix G, "Duct Cleanliness for New Construction Guidelines." M. Maintain covers on all installed and stored ductwork when not being actively worked on. 3.2 DUCT SEALING A. Seal ducts for duct static-pressure, seal classes, and leakage classes specified in "Duct Schedule" Article according to SMACNA's "HVAC Duct Construction Standards -Metal and Flexible." B. Seal ducts to the following seal classes according to SMACNA's "HVAC Duct Construction Standards -Metal and Flexible": 1. Comply with SMACNA's "HVAC Duct Construction Standards -Metal and Flexible." 2. All ductwork -SMACNA Seal Class A. www.studio3design.net Phone: (317) 595.1000 8604 Allisonville Road, Suite 330 Indianapolis, IN 46250 A B C D E 1 2 3 4 5 6 7 A B C D E THESE DRAWINGS ARE THE PROPERTY OF STUDIO 3 DESIGN, INC. ALL RIGHTS RESERVED PROJECT NUMBER: DATE: CERTIFICATION: SHEET DESCRIPTION: SHEET NUMBER: REVISION SCHEDULE: 1 2 3 4 5 6 7 21019 IUH SPRINGMILLGI CLINIC RENOVATION: PHASE IApril 9, 2021 HVAC Specifications H00310300 N. ILLINOIS ST.INDIANAPOLIS, IN 46290# Revision Description Date Issued 06/08/21