Specification_-_23_00_00_-_B90.pdf

CONSTRUCT FIRE STATION ADDITION, BUILDING 90 PROJECT NO. DKGV12-2035

FINAL SUBMITTAL 5 NOVEMBER 2018

SECTION 23 00 00

AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS

08/10

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this s pecification to the extent referenced. The publications are referred t o within the text by the basic designation only.

AIR MOVEMENT AND CONTROL ASSOCIATION INTERNATIONAL (AMCA)

AMCA 201 (2002; R 2011) Fans and Systems

AMCA 210 (2007) Laboratory Methods of Testing Fans for Aerodynamic Performance Rating

AMCA 300 (2008) Reverberant Room Method for Sound Testing of Fans

AMCA 301 (2014) Methods for Calculating Fan Sound Ratings from Laboratory Test Data

AMCA 500-D (2012) Laboratory Methods of Testing Dampers for Rating

AIR-CONDITIONING, HEATING AND REFRIGERATION INSTITU TE (AHRI)

AHRI 260 I-P (2012) Sound Rating of Ducted Air Moving and Conditioning Equipment

AHRI 350 (2008) Sound Rating of Non-Ducted Indoor Air-Conditioning Equipment

AHRI 410 (2001; Addendum 1 2002; Addendum 2 2005;

Addendum 3 2011) Forced-Circulation Air-Cooling and Air-Heating Coils

AHRI 430 (2009) Central-Station Air-Handling Units

AHRI 440 (2008) Room Fan-Coils and Unit Ventilators

AHRI Guideline D (1996) Application and Installation of Central Station Air-Handling Units

AMERICAN BEARING MANUFACTURERS ASSOCIATION (ABMA)

ABMA 11 (2014) Load Ratings and Fatigue Life for Roller Bearings

ABMA 9 (1990; ERTA 2012; S 2013) Load Ratings and Fatigue Life for Ball Bearings

SECTION 23 00 00 Page 1

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR- CONDITIONING

ENGINEERS (ASHRAE)

ASHRAE 52.2 (2012; Errata 2013; INT 1 2014) Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size

ASHRAE 62.1 (2010; Errata 2011; INT 3 2012; INT 4 2012; INT 5 2013) Ventilation for Acceptable Indoor Air Quality

ASHRAE 68 (1997) Laboratory Method of Testing to Determine the Sound Power In a Duct

ASHRAE 70 (2006; R 2011) Method of Testing for Rating the Performance of Air Outlets and Inlets

ASHRAE 84 (2013; Addenda A 2013) Method of Testing Air-to-Air Heat Exchangers

ASHRAE 90.1 - IP (2010; ERTA 2011-2013) Energy Standard for Buildings Except Low-Rise Residential Buildings

ASME INTERNATIONAL (ASME)

ASME A13.1 (2007; R 2013) Scheme for the Identification of Piping Systems

ASTM INTERNATIONAL (ASTM)

ASTM A123/A123M (2013) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A167 (2011) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip

ASTM A53/A53M (2012) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A924/A924M (2014) Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

ASTM B117 (2011) Standard Practice for Operating Salt Spray (Fog) Apparatus

ASTM B280 (2013) Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service

ASTM B766 (1986; R 2008) Standard Specification for Electrodeposited Coatings of Cadmium

SECTION 23 00 00 Page 2

ASTM C1071 (2012) Standard Specification for Fibrous Glass Duct Lining Insulation (Thermal and Sound Absorbing Material)

ASTM C553 (2013) Standard Specification for Mineral Fiber Blanket Thermal Insulation for Commercial and Industrial Applications

ASTM C916 (2014) Standard Specification for Adhesives for Duct Thermal Insulation

ASTM D1654 (2008) Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments

ASTM D3359 (2009; E 2010; R 2010) Measuring Adhesion by Tape Test

ASTM D520 (2000; R 2011) Zinc Dust Pigment

ASTM E2016 (2011) Standard Specification for Industrial Woven Wire Cloth

ASTM E84 (2014) Standard Test Method for Surface Burning Characteristics of Building Materials

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA MG 1 (2011; Errata 2012) Motors and Generators

NEMA MG 10 (2013) Energy Management Guide for Selection and Use of Fixed Frequency Medium AC Squirrel-Cage Polyphase Induction Motors

NEMA MG 11 (1977; R 2012) Energy Management Guide for Selection and Use of Single Phase Motors

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2014; AMD 1 2013; Errata 1 2013; AMD 2 2013; Errata 2 2013; AMD 3 2014; Errata 3-4 2014; AMD 4-6 2014) National Electrical Code

NFPA 701 (2010) Standard Methods of Fire Tests for Flame Propagation of Textiles and Films

NFPA 90A (2015) Standard for the Installation of Air Conditioning and Ventilating Systems

SCIENTIFIC CERTIFICATION SYSTEMS (SCS)

SCS Scientific Certification Systems (SCS)Indoor Advantage

SECTION 23 00 00 Page 3

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION

(SMACNA)

SMACNA 1819 (2002) Fire, Smoke and Radiation Damper Installation Guide for HVAC Systems, 5th Edition

SMACNA 1966 (2005) HVAC Duct Construction Standards Metal and Flexible, 3rd Edition

SMACNA 1981 (2008) Seismic Restraint Manual Guidelines for Mechanical Systems, 3rd Edition

U.S. DEPARTMENT OF DEFENSE (DOD)

MIL-STD-101 (2014; Rev C) Color Code for Pipelines and for Compressed Gas Cylinders

UFC 4-010-01 (2012) DoD Minimum Antiterrorism Standards for Buildings

U.S. DEPARTMENT OF ENERGY (DOE)

PL-109-58 (1992; R 2005) Energy Efficient Procurement Requirements

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION ( NARA)

40 CFR 82 Protection of Stratospheric Ozone

UL ENVIRONMENT (ULE)

ULE Greenguard UL Greenguard Certification Program

UNDERWRITERS LABORATORIES (UL)

UL 181 (2013) Factory-Made Air Ducts and Air Connectors

UL 1995 (2011) Heating and Cooling Equipment

UL 555 (2006; Reprint May 2014) Standard for Fire Dampers

UL 555S (2014) Smoke Dampers

UL 586 (2009; Reprint Sep 2014) Standard for High-Efficiency Particulate, Air Filter Units

UL 6 (2007; Reprint Nov 2014) Electrical Rigid Metal Conduit-Steel

UL 705 (2004; Reprint Dec 2013) Standard for Power Ventilators

UL 723 (2008; Reprint Aug 2013) Test for Surface Burning Characteristics of Building Materials

SECTION 23 00 00 Page 4

UL 900 (2004; Reprint Feb 2012) Standard for Air Filter Units

UL 94 (2013; Reprint Sep 2014) Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances

UL Bld Mat Dir (2012) Building Materials Directory

UL Electrical Constructn (2012) Electrical Construction Equipment Directory

UL Fire Resistance (2012) Fire Resistance Directory

1.2 SYSTEM DESCRIPTION

Furnish ductwork, piping offsets, fittings, and acc essories as required to provide a complete installation. Coordinate the wo rk of the different trades to avoid interference between piping, equipm ent, structural, and electrical work. Provide complete, in place, all n ecessary offsets in piping and ductwork, and all fittings, and other co mponents, required to install the work as indicated and specified.

1.2.1 Mechanical Equipment Identification

The number of charts and diagrams shall be equal to or greater than the number of mechanical equipment rooms. Where more t han one chart or diagram per space is required, mount these in edge pivoted, swinging leaf, extruded aluminum frame holders which open to 170 degrees.

1.2.1.1 Charts

Provide chart listing of equipment by designation n umbers and capacities such as flow rates, pressure and temperature differ ences, heating and cooling capacities, horsepower, pipe sizes, and vol tage and current characteristics.

1.2.1.2 Diagrams

Submit proposed diagrams, at least 2 weeks prior to start of related testing. provide neat mechanical drawings provided with extruded aluminum frame under 1/8-inch glass or laminated plastic, s ystem diagrams that show the layout of equipment, piping, and ductwork, and typed condensed operation manuals explaining preventative maintenan ce procedures, methods of checking the system for normal, safe operation, and procedures for safely starting and stopping the system. After app roval, post these items where directed.

1.2.2 Service Labeling

Label equipment, including fans, air handlers, term inal units, etc. with labels made of self-sticking, plastic film designed for permanent installation. Labels shall be in accordance with t he typical examples below:

SECTION 23 00 00 Page 5

SERVICE LABEL AND TAG DESIGNATION

Air handling unit Number AHU - [_____]

Control and instrument air CONTROL AND INSTR.

VRV Air Handler Number AH - [_____]

Dedicated Outdoor Air Unit Number DOAU - [_____]

Condensing Unit CU - [_____]

Identify similar services with different temperatur es or pressures. Where pressures could exceed 125 pounds per square inch, gage, include the maximum system pressure in the label. Label and ar row piping in accordance with the following:

a. Each point of entry and exit of pipe passing th rough walls.

b. Each change in direction, i.e., elbows, tees.

c. In congested or hidden areas and at all access panels at each point required to clarify service or indicated hazard.

d. In long straight runs, locate labels at distanc es within eyesight of each other not to exceed 75 feet. All labels shall be visible and legible from the primary service and operating area .

For Bare or Insulated Pipes for Outside Diameters of Lettering

1/2 thru 1-3/8 inch 1/2 inch

1-1/2 thru 2-3/8 inch 3/4 inch

2-1/2 inch and larger 1-1/4 inch

1.2.3 Color Coding

Color coding of all piping systems shall be in acco rdance with ASME A13.1 and MIL-STD-101 .

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Con tractor Quality Control approval. Submittals with an "S" are for inclusion in the Sustainability Notebook, in conformance to Section 01 33 29 SUSTAI NABILITY REPORTING.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

SECTION 23 00 00 Page 6

Detail Drawings; G

SD-03 Product Data

Metallic Flexible Duct Insulated Nonmetallic Flexible Duct Runouts Duct Connectors Duct Access Doors; G Fire Dampers: G Manual Balancing Dampers; G Automatic Smoke-Fire Dampers Automatic Smoke Dampers Sound Attenuation Equipment Acoustical Duct Liner Diffusers Registers and Grilles Louvers Air Vents, Penthouses, and Goosenecks Ceiling Exhaust Fans; G Air Handling Units; G Room Fan-Coil Units; G Energy Recovery Devices; G Test Procedures Diagrams; G

SD-06 Test Reports

Performance Tests; G Damper Acceptance Test; G

SD-07 Certificates

Bolts Certification

SD-08 Manufacturer's Instructions

Manufacturer's Installation Instructions Operation and Maintenance Training

SD-10 Operation and Maintenance Data

Operation and Maintenance Manuals; G

Fire Dampers; G Manual Balancing Dampers; G Automatic Smoke-Fire Dampers; G Automatic Smoke Dampers; G Ceiling Exhaust Fans; G Air Handling Units; G Room Fan-Coil Units; G Energy Recovery Devices; G

1.4 QUALITY ASSURANCE

Except as otherwise specified, approval of material s and equipment is based on manufacturer's published data.

a. Where materials and equipment are specified to conform to the standards

SECTION 23 00 00 Page 7 of the Underwriters Laboratories, the label of or l isting with reexamination in UL Bld Mat Dir , and UL 6 is acceptable as sufficient evidence that the items conform to Underwriters Lab oratories requirements. In lieu of such label or listing, su bmit a written certificate from any nationally recognized testing agency, adequately equipped and competent to perform such services, st ating that the items have been tested and that the units conform to the specified requirements. Outline methods of testing used by t he specified agencies.

b. Where materials or equipment are specified to b e constructed or tested, or both, in accordance with the standards of the AS TM International (ASTM), the ASME International (ASME), or other sta ndards, a manufacturer's certificate of compliance of each it em is acceptable as proof of compliance.

c. Conformance to such agency requirements does no t relieve the item from compliance with other requirements of these specifi cations.

d. Where products are specified to meet or exceed the specified energy efficiency requirement of FEMP-designated or ENERGY STAR coveed product categories, equipment selected shall have as a mini mum the efficiency rating identified under "Energy-Efficient Products" at http://www1.eere.energy.gov/femp/procurement .

These specifications conform to the efficiency requirements as defined in Public Law PL-109-58 , "Energy Policy Act of 2005" for federal procurement of energy-efficient products. Equipmen t having a lower efficiency than ENERGY STAR or FEMP requirements ma y be specified if the designer determines the equipment to be more li fe-cycle cost effective using the life-cycle cost analysis method ology and procedure in 10 CFR 436.

1.4.1 Prevention of Corrosion

Protect metallic materials against corrosion. Manu facturer shall provide rust-inhibiting treatment and standard finish for t he equipment enclosures. Do not use aluminum in contact with ea rth, and where connected to dissimilar metal. Protect aluminum by approved fittings, barrier material, or treatment. Ferrous parts such as anch ors, bolts, braces, boxes, bodies, clamps, fittings, guards, nuts, pins , rods, shims, thimbles, washers, and miscellaneous parts not of corrosion-r esistant steel or nonferrous materials shall be hot-dip galvanized in accordance with ASTM A123/A123M for exterior locations and cadmium-plated in confo rmance with ASTM B766 for interior locations.[ Provide written certific ation from the bolt manufacturer that the bolts furnished comp ly with the requirements of this specification. Include illustrations of pr oduct markings, and the number of each type of bolt to be furnished in the certification.]

1.4.2 Asbestos Prohibition

Do not use asbestos and asbestos-containing product s.

1.4.3 Ozone Depleting Substances Used as Refrigerants

Minimize releases of Ozone Depleting Substances (OD S) during repair, maintenance, servicing or disposal of appliances co ntaining ODS's by complying with all applicable sections of 40 CFR 82 Part 82 Subpart F. Any person conducting repair, maintenance, servicing or disposal of appliances

SECTION 23 00 00 Page 8 owned by NASA shall comply with the following:

a. Do not knowingly vent or otherwise release into the environment, Class I or Class II substances used as a refrigerant.

b. Do not open appliances without meeting the requ irements of 40 CFR 82 Part 82.156 Subpart F, regarding required practices for evacuation and collection of refrigerant, and 40 CFR 82 Part 82.158 Subpart F, regarding standards of recycling and recovery equip ment.

c. Only persons who comply with 40 CFR 82 Part 82.161 Subpart F, regarding technician certification, can conduct work on appli ances containing refrigerant.

In addition, provide copies of all applicable certi fications to the Contracting Officer at least 14 calendar days prior to initiating maintenance, repair, servicing, dismantling or disp osal of appliances, including:

a. Proof of Technician Certification

b. Proof of Equipment Certification for recovery o r recycling equipment.

c. Proof of availability of certified recovery or recycling equipment.

1.4.4 Use of Ozone Depleting Substances, Other than Refri gerants

The use of Class I or Class II ODS's listed as none ssential in 40 CFR 82 Part 82.66 Subpart C is prohibited. These prohibit ed materials and uses include:

a. Any plastic party spray streamer or noise horn which is propelled by a chlorofluorocarbon

b. Any cleaning fluid for electronic and photograp hic equipment which contains a chlorofluorocarbon; including liquid pac kaging, solvent wipes, solvent sprays, and gas sprays.

c. Any plastic flexible or packaging foam product which is manufactured with or contains a chlorofluorocarbon, including, o pen cell foam, open cell rigid polyurethane poured foam, closed cell ex truded polystyrene sheet foam, closed cell polyethylene foam and close d cell polypropylene foam except for flexible or packaging foam used in coaxial cabling.

d. Any aerosol product or other pressurized dispen ser which contains a chlorofluorocarbon, except for those listed in 40 CFR 82 Part 82.66 Subpart C.

Request a waiver if a facility requirement dictates that a prohibited material is necessary to achieve project goals. Su bmit the waiver request in writing to the Contracting Officer. The waiver will be evaluated and dispositioned.

1.4.5 Detail Drawings

Submit detail drawings showing equipment layout, in cluding assembly and installation details and electrical connection diag rams; ductwork layout showing the location of all supports and hangers, t ypical hanger details, gauge reinforcement, reinforcement spacing rigidity classification, and

SECTION 23 00 00 Page 9 static pressure and seal classifications. Include any information required to demonstrate that the system has been coordinated and functions properly as a unit on the drawings and show equipment relati onship to other parts of the work, including clearances required for operati on and maintenance.

Submit drawings showing bolt-setting information, a nd foundation bolts prior to concrete foundation construction for all e quipment indicated or required to have concrete foundations. Submit func tion designation of the equipment and any other requirements specified thro ughout this Section with the shop drawings.

1.4.6 Test Procedures

Submit proposed test procedures and test schedules for the ductwork leak test, and performance tests of systems, at least 2 weeks prior to the start of related testing.

1.4.7 Sustainable Design Certification

Product shall be third party certified in accordanc e with ULE Greenguard , SCS Scientific Certification Systems Indoor Advantageo r equal.

Certification shall be performed annually and shall be current.

1.5 DELIVERY, STORAGE, AND HANDLING

Protect stored equipment at the jobsite from the we ather, humidity and temperature variations, dirt and dust, or other con taminants.

Additionally, cap or plug all pipes until installed .

PART 2 PRODUCTS

2.1 STANDARD PRODUCTS

Provide components and equipment that are "standard products" of a manufacturer regularly engaged in the manufacturing of products that are of a similar material, design and workmanship. "Stand ard products" is defined as being in satisfactory commercial or industrial u se for 2 years before bid opening, including applications of components a nd equipment under similar circumstances and of similar size, satisfac torily completed by a product that is sold on the commercial market throu gh advertisements, manufacturers' catalogs, or brochures. Products ha ving less than a 2-year field service record are acceptable if a certified record of satisfactory field operation, for not less than 6000 hours exclu sive of the manufacturer's factory tests, can be shown. Provid e equipment items that are supported by a service organization. In produc t categories covered by ENERGY STAR or the Federal Energy Management Progra m, provide equipment that is listed on the ENERGY STAR Qualified Product s List or that meets or exceeds the FEMP-designated Efficiency Requirements .

2.2 STANDARD PRODUCTS

Except for the fabricated duct, plenums and casings specified in paragraphs "Metal Ductwork" and "Plenums and Casings for Field -Fabricated Units", provide components and equipment that are standard products of manufacturers regularly engaged in the manufacturin g of products that are of a similar material, design and workmanship. Thi s requirement applies to all equipment, including diffusers, registers, fire dampers, and balancing dampers.

a. Standard products are defined as components and equipment that have

SECTION 23 00 00 Page 10 been in satisfactory commercial or industrial use i n similar applications of similar size for at least two year s before bid opening.

b. Prior to this two year period, these standard p roducts shall have been sold on the commercial market using advertisements in manufacturers' catalogs or brochures. These manufacturers' catal ogs, or brochures shall have been copyrighted documents or have been identified with a manufacturer's document number.

c. Provide equipment items that are supported by a service organization.

In product categories covered by ENERGY STAR or the Federal Energy Management Program, provide equipment that is liste d on the ENERGY STAR Qualified Products List or that meets or exceeds th e FEMP-designated Efficiency Requirements.

2.3 IDENTIFICATION PLATES

In addition to standard manufacturer's identificati on plates, provide engraved laminated phenolic identification plates f or each piece of mechanical equipment. Identification plates are to designate the function of the equipment. Submit designation with the shop drawings.

Identification plates shall be three layers, black- white-black, engraved to show white letters on black background. Letters sh all be upper case.

Identification plates 1-1/2-inches high and smaller shall be 1/16-inch thick, with engraved lettering 1/8-inch high; ident ification plates larger than 1-1/2-inches high shall be 1/8-inch thick, wit h engraved lettering of suitable height. Identification plates 1-1/2-inche s high and larger shall have beveled edges. Install identification plates using a compatible adhesive.

2.4 EQUIPMENT GUARDS AND ACCESS

Fully enclose or guard belts, pulleys, chains, gear s, couplings, projecting setscrews, keys, and other rotating parts exposed t o personnel contact according to OSHA requirements. Properly guard or cover with insulation of a type specified, high temperature equipment and pi ping exposed to contact by personnel or where it creates a potential fire h azard.

2.5 ELECTRICAL WORK

a. Provide motors, controllers, integral disconnec ts, contactors, and controls with their respective pieces of equipment, except controllers indicated as part of motor control centers. Provid e electrical equipment, including motors and wiring, as specifie d in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. Provide manual or au tomatic control and protective or signal devices required for the opera tion specified and control wiring required for controls and devices sp ecified, but not shown. For packaged equipment, include manufacture r provided controllers with the required monitors and timed re start.

b. For single-phase motors, provide high-efficienc y type, fractional-horsepower alternating-current motors, i ncluding motors that are part of a system, in accordance with NEMA MG 11. Integral size motors shall be the premium efficiency type in acco rdance with NEMA MG 1.

c. For polyphase motors, provide squirrel-cage med ium induction motors, including motors that are part of a system , and th at meet the efficiency ratings for premium efficiency motors in accordance with NEMA MG 1. Select premium efficiency polyphase motors in ac cordance

SECTION 23 00 00 Page 11 with NEMA MG 10.

d. Provide motors in accordance with NEMA MG 1 and of sufficient size to drive the load at the specified capacity without ex ceeding the nameplate rating of the motor. Provide motors rate d for continuous duty with the enclosure specified. Provide motor d uty that allows for maximum frequency start-stop operation and minimum encountered interval between start and stop. Provide motor torque capab le of accelerating the connected load within 20 seconds with 80 percen t of the rated voltage maintained at motor terminals during one st arting period.

Provide motor starters complete with thermal overlo ad protection and other necessary appurtenances. Fit motor bearings with grease supply fittings and grease relief to outside of the enclos ure.

e. Where two-speed or variable-speed motors are in dicated, solid-state variable-speed controllers are allowed to accomplis h the same function. Use solid-state variable-speed controlle rs for motors rated 10 hp or less and adjustable frequency drives for l arger motors.

Provide variable frequency drives for motors as spe cified in Section 23 09 23.13 20BACnet DIRECT DIGITAL CONTROLS SYSTEM S FOR HVAC 26 29 23

VARIABLE FREQUENCY DRIVE SYSTEMS UNDER 600 VOLTS.]

2.6 ANCHOR BOLTS

Provide anchor bolts for equipment placed on concre te equipment pads or on concrete slabs. Bolts to be of the size and number recommended by the equipment manufacturer and located by means of suit able templates.

Installation of anchor bolts shall not degrade the surrounding concrete.

2.7 SEISMIC ANCHORAGE

Anchor equipment in accordance with applicable seis mic criteria for the area and as defined in SMACNA 1981

2.8 PAINTING

Paint equipment units in accordance with approved e quipment manufacturer's standards unless specified otherwise. Field retouc h only if approved.

Otherwise, return equipment to the factory for refi nishing.

2.9 INDOOR AIR QUALITY

Provide equipment and components that comply with the requirements of ASHRAE 62.1 unless more stringent requirements are specified h erein.

2.10 DUCT SYSTEMS

2.10.1 Metal Ductwork

Provide metal ductwork construction, including all fittings and components, that complies with SMACNA 1966, as supplemented and modified by this specification .

a. Ductwork shall be constructed meeting the requi rements for the duct system static pressure specified in APPENDIX D of S ection 23 05 93

TESTING, ADJUSTING AND BALANCING FOR HVAC.

b. Provide radius type elbows with a centerline ra dius of 1.5 times the width or diameter of the duct where space permits. Otherwise, elbows

SECTION 23 00 00 Page 12 having a minimum radius equal to the width or diame ter of the duct or square elbows with factory fabricated turning vanes are allowed.

c. Provide ductwork that meets the requirements of Seal Class A. Provide ductwork in VAV systems upstream of the VAV boxes t hat meets the requirements of Seal Class A.

d. Provide ductwork that meets the requirements of Seal Class A. Provide ductwork in VAV systems upstream of the VAV boxes t hat meets the requirements of Seal Class A.

e. Provide sealants that conform to fire hazard cl assification specified in Section 23 07 00 THERMAL INSULATION FOR MECHANIC AL SYSTEMS and are suitable for the range of air distribution and ambi ent temperatures to which it is exposed. Do not use pressure sensitive tape as a sealant.

f. Make spiral lock seam duct, and flat oval with duct sealant and lock with not less than 3 equally spaced drive screws or other approved methods indicated in SMACNA 1966. Apply the sealant to the exposed male part of the fitting collar so that the sealer is on the inside of the joint and fully protected by the metal of the d uct fitting. Apply one brush coat of the sealant over the outside of t he joint to at least 2 inch band width covering all screw heads and join t gap. Dents in the male portion of the slip fitting collar are not acc eptable. Fabricate outdoor air intake ducts and plenums with watertigh t soldered or brazed joints and seams.

2.10.1.1 Metallic Flexible Duct

a. Provide duct that conforms to UL 181 and NFPA 90A with factory-applied insulation, vapor barrier, and end connections. Pr ovide duct assembly that does not exceed 25 for flame spread and 50 for smoke developed.

Provide ducts designed for working pressures of 2 i nches water gauge positive and 1.5 inches water gauge negative. Prov ide flexible round duct length that does not exceed 5 feet. Secure co nnections by applying adhesive for 2 inches over rigid duct, app ly flexible duct 2 inches over rigid duct, apply metal clamp, and prov ide minimum of three No. 8 sheet metal screws through clamp and rigid du ct.

b. Inner duct core: Provide interlocking spiral o r helically corrugated flexible core constructed of zinc-coated steel, alu minum, or stainless steel; or constructed of inner liner of continuous galvanized spring steel wire helix fused to continuous, fire-retardan t, flexible vapor barrier film, inner duct core.

c. Insulation: Provide inner duct core that is in sulated with mineral fiber blanket type flexible insulation, minimum of 1 inch thick.

Provide insulation covered on exterior with manufac turer's standard fire retardant vapor barrier jacket for flexible ro und duct.

2.10.1.2 Insulated Nonmetallic Flexible Duct Runouts

Use flexible duct runouts only where indicated. Ru nout length is indicated on the drawings, and is not to exceed 5 feet. Prov ide runouts that are preinsulated, factory fabricated, and that comply w ith NFPA 90A and UL 181 .

Provide either field or factory applied vapor barri er. Provide not less than 20 ounce glass fabric duct connectors coated o n both sides with neoprene. Where coil induction or high velocity un its are supplied with vertical air inlets, use a streamlined, vaned and m itered elbow transition

SECTION 23 00 00 Page 13 piece for connection to the flexible duct or hose. Provide a die-stamped elbow and not a flexible connector as the last elbo w to these units other than the vertical air inlet type. Insulated flexib le connectors are allowed as runouts. Provide insulated material and vapor barrier that conform to the requirements of Section 23 07 00 THE RMAL INSULATION FOR MECHANICAL SYSTEMS. Do not expose the insulation m aterial surface to the air stream.

2.10.1.3 General Service Duct Connectors

Provide a flexible duct connector approximately 6 i nches in width where sheet metal connections are made to fans or where d ucts of dissimilar metals are connected. For round/oval ducts, secure the flexible material by stainless steel or zinc-coated, iron clinch-type draw bands. For rectangular ducts, install the flexible material lo cked to metal collars using normal duct construction methods. Provide a composite connector system that complies with NFPA 701 and is classified as "flame-retardent fabrics" in UL Bld Mat Dir .

2.10.1.4 Corrosion Resisting (Stainless) Steel Sheets

ASTM A167

2.10.2 Duct Access Doors

Provide hinged access doors conforming to SMACNA 1966 in ductwork and plenums where indicated and at all air flow measuri ng primaries, automatic dampers, fire dampers, coils, thermostats, and othe r apparatus requiring service and inspection in the duct system. Provide access doors upstream and downstream of air flow measuring primaries and heating and cooling coils. Provide doors that are a minimum 15 by 18 i nches, unless otherwise shown. Where duct size does not accommodate this s ize door, make the doors as large as practicable. Equip doors 24 by 24 inch es or larger with fasteners operable from inside and outside the duct . Use insulated type doors in insulated ducts.

2.10.3 Fire Dampers

Use 1.5 hour rated fire dampers unless otherwise in dicated. Provide fire dampers that conform to the requirements of NFPA 90A and UL 555 . Perform the fire damper test as outlined in NFPA 90A. Provide a pressure relief door upstream of the fire damper. If the ductwork connected to the fire damper is to be insulated then provide a factory in stalled pressure relief damper. Provide automatic operating fire dampers w ith a dynamic rating suitable for the maximum air velocity and pressure differential to which it is subjected. Provide fire dampers approved for th e specific application, and install according to their listing. Equip fire dampers with a steel sleeve or adequately sized frame installed in such a manner that disruption of the attached ductwork, if any, does not impair t he operation of the damper. Equip sleeves or frames with perimeter mou nting angles attached on both sides of the wall or floor opening. Construct ductwork in fire-rated floor-ceiling or roof-ceiling assembly systems with air ducts that pierce the ceiling of the assemblies in conformance with UL Fire Resistance .

Provide out of the air stream fire dampers. Instal l dampers that do not reduce the duct or the air transfer opening cross-s ectional area. Install dampers so that the centerline of the damper depth or thickness is located in the centerline of the wall, partition or floor s lab depth or thickness.

Unless otherwise indicated, comply with the install ation details given in SMACNA 1819 and in manufacturer's instructions for fire damper s. Perform

SECTION 23 00 00 Page 14 acceptance testing of fire dampers according to par agraph Fire Damper Acceptance Test and NFPA 90A.

2.10.4 Manual Balancing Dampers

Furnish manual balancing dampers with accessible op erating mechanisms. Use chromium plated operators (with all exposed edges r ounded) in finished portions of the building. Provide manual volume co ntrol dampers that are operated by locking-type quadrant operators. Insta ll dampers that are 2 gauges heavier than the duct in which installed. U nless otherwise indicated, provide opposed blade type multileaf dam pers with maximum blade width of 12 inches. Provide access doors or panels for all concealed damper operators and locking setscrews. Provide st and-off mounting brackets, bases, or adapters not less than the thic kness of the insulation when the locking-type quadrant operators for damper s are installed on ducts to be thermally insulated, to provide clearance bet ween the duct surface and the operator. Stand-off mounting items shall b e integral with the operator or standard accessory of the damper manufa cturer.

2.10.5 Manual Balancing Dampers

a. Furnish manual balancing dampers with accessibl e operating mechanisms.

Use chromium plated operators (with all exposed edg es rounded) in finished portions of the building. Provide manual volume control dampers that are operated by locking-type quadrant operators.

b. Unless otherwise indicated, provide opposed bla de type multileaf dampers with maximum blade width of 12 inches. Pro vide access doors or panels for all concealed damper operators and locki ng setscrews.

Provide access doors or panels in hard ceilings, pa rtitions and walls for access to all concealed damper operators and da mper locking setscrews. Coordinate location of doors or panels with other affected contractors.

c. Provide stand-off mounting brackets, bases, or adapters not less than the thickness of the insulation when the locking-ty pe quadrant operators for dampers are installed on ducts to be thermally insulated, to provide clearance between the duct surface and t he operator.

Stand-off mounting items shall be integral with the operator or standard accessory of the damper manufacturer.

2.10.5.1 Square or Rectangular Dampers

2.10.5.1.1 Duct Height 12 inches and Less

2.10.5.1.1.1 Frames

Width Height Galvanized Steel Thickness

Length

Maximum 19 inches Maximum 12 inches Minimum 20 gauge Minimum 3 inches

More than 19 inches

Maximum 12 inches Minimum 16 gauge Minimum 3 inches

SECTION 23 00 00 Page 15

2.10.5.1.1.2 Single Leaf Blades

Width Height Galvanized Steel Thickness

Length

Maximum 19 inches Maximum 12 inches Minimum 20 gauge Minimum 3 inches

More than 19 inches

Maximum 12 inches Minimum 16 gauge Minimum 3 inches

2.10.5.1.1.3 Blade Axles

To support the blades of round dampers, provide gal vanized steel shafts supporting the blade the entire duct diameter frame -to-frame. Axle shafts shall extend through standoff bracket and hand quad rant.

Width Height Material Square Shaft

Maximum 19 inches Maximum 12 inches Galvanized Steel Minimum 3/8 inch

More than 19 inches

Maximum 12 inches Galvanized Steel Minimum 1/2 inch

2.10.5.1.1.4 Axle Bearings

Support the shaft on each end at the frames with sh aft bearings. Shaft bearings configuration shall be a pressed fit to pr ovide a tight joint between blade shaft and damper frame.

Width Height Material

Maximum 19 inches Maximum 12 inches solid nylon, or equivalent solid plastic, or oil-impregnated bronze

More than 19 inches Maximum 12 inches oil-impregnated bronze

2.10.5.1.1.5 Control Shaft/Hand Quadrant

Provide dampers with accessible locking-type contro l shaft/hand quadrant operators.

Provide stand-off mounting brackets, bases, or adap ters for the locking-type quadrant operators on dampers installe d on ducts to be thermally insulated. Stand-off distance shall be a minimum of 2 inches off the metal duct surface. Stand-off mounting items s hall be integral with the operator or standard accessory of the damper ma nufacturer.

2.10.5.1.1.6 Finish

Mill Galvanized

SECTION 23 00 00 Page 16

2.10.5.1.2 Duct Height Greater than 12 inches

2.10.5.1.2.1 Dampers

Provide dampers with multi-leaf opposed-type blades .

2.10.5.1.2.2 Frames

Maximum 48 inches in height; maximum 48 inches in width; minimum of 16 gauge galvanized steel, minimum of 5 inches long.

2.10.5.1.2.3 Blades

Minimum of 16 gauge galvanized steel; 6 inch nomina l width.

2.10.5.1.2.4 Blade Axles

To support the blades of round dampers, provide gal vanized square steel shafts supporting the blade the entire duct diamete r frame-to-frame. Axle shafts shall extend through standoff bracket and ha nd quadrant.

2.10.5.1.2.5 Axle Bearings

Support the shaft on each end at the frames with sh aft bearings constructed of oil-impregnated bronze, or solid nylon, or a sol id plastic equivalent to nylon. Shaft bearings configuration shall be a pre ssed fit to provide a tight joint between blade shaft and damper frame.

2.10.5.1.2.6 Blade Actuator

Minimum 1/2 inch diameter galvanized steel.

2.10.5.1.2.7 Blade Actuator Linkage

Mill Galvanized steel bar and crank plate with stai nless steel pivots.

2.10.5.1.2.8 Control Shaft/Hand Quadrant

Provide dampers with accessible locking-type contro l shaft/hand quadrant operators.

Provide stand-off mounting brackets, bases, or adap ters for the locking-type quadrant operators on dampers installe d on ducts to be thermally insulated. Stand-off distance shall be a minimum of 2 inches off the metal duct surface. Stand-off mounting items s hall be integral with the operator or standard accessory of the damper ma nufacturer.

2.10.5.1.2.9 Finish

Mill Galvanized

SECTION 23 00 00 Page 17

2.10.5.2 Round Dampers

2.10.5.2.1 Frames

Size Galvanized Steel Thickness

Length

4 to 20 inches Minimum 20 gauge Minimum 6 inches

22 to 30 inches Minimum 20 gauge Minimum 10 inches

32 to 40 inches Minimum 16 gauge Minimum 10 inches

2.10.5.2.2 Blades

Size Galvanized Steel Thickness

4 to 20 inches Minimum 20 gauge

22 to 30 inches Minimum 16 gauge

32 to 40 inches Minimum 10 gauge

2.10.5.2.3 Blade Axles

To support the blades of round dampers, provide gal vanized steel shafts supporting the blade the entire duct diameter frame -to-frame. Axle shafts shall extend through standoff bracket and hand quad rant.

Size Shaft Size and Shape

4 to 20 inches Minimum 3/8 inch square

22 to 30 inches Minimum 1/2 inch square

32 to 40 inches Minimum 3/4 inch square

2.10.5.2.4 Axle Bearings

Support the shaft on each end at the frames with sh aft bearings constructed of oil-impregnated bronze, or solid nylon, or a sol id plastic equivalent to nylon. Shaft bearings configuration shall be a pre ssed fit to provide a tight joint between blade shaft and damper frame.

SECTION 23 00 00 Page 18

Size Material

4 to 20 inches solid nylon, or equivalent solid plastic, or oil-impregnated bronze

22 to 30 inches solid nylon, or equivalent solid plastic, or oil-impregnated bronze

32 to 40 inches oil-impregnated bronze, or stainless steel sleeve bearing

2.10.5.2.5 Control Shaft/Hand Quadrant

Provide dampers with accessible locking-type contro l shaft/hand quadrant operators.

Provide stand-off mounting brackets, bases, or adap ters for the locking-type quadrant operators on dampers installe d on ducts to be thermally insulated. Stand-off distance shall be a minimum of 2 inches off the metal duct surface. Stand-off mounting items s hall be integral with the operator or standard accessory of the damper ma nufacturer.

2.10.5.2.6 Finish

Mill Galvanized

2.10.6 Automatic Balancing Dampers

Provide dampers as specified in paragraph SUPPLEMEN TAL COMPONENTS/SERVICES, subparagraph CONTROLS.

2.10.7 Automatic Smoke-Fire Dampers

Multiple blade type, 180 degrees F fusible fire dam per link; smoke damper assembly to include electric damper operator. UL 555 as a 1.5 hour rated fire damper; further qualified under UL 555S as a leakage rated damper.

Provide a leakage rating under UL 555S that is no higher than Class II or III at an elevated temperature Category B ( 250 deg rees F for 30 minutes ). Ensure that pressure drop in the damper open po sition does not exceed

0.1 inch water gauge with average duct velocities o f 2500 fpm.

2.10.8 Automatic Smoke Dampers

UL listed multiple blade type, supplied by smoke da mper manufacturer, with electric damper operator as part of assembly. Qual ified under UL 555S with a leakage rating no higher than Class II or III at an elevated temperature Category B ( 250 degrees F for 30 minutes ). Ensur e that pressure drop in the damper open position does not exceed 0.1 inch w ater gauge with average duct velocities of 2500 fpm.

2.10.9 Air Supply And Exhaust Air Dampers

Where outdoor air supply and exhaust air dampers ar e required they shall have a maximum leakage rate when tested in accordan ce with AMCA 500-D as required by ASHRAE 90.1 - IP or UFC 4-010-01 , including maximum Damper Leakage for:

a. Climate Zones 1,2,6,7,8 the maximum damper leak age at 1.0 inch w.g. for motorized dampers is 4 cfm per square foot of dampe r area and

SECTION 23 00 00 Page 19 non-motorized dampers are not allowed.

b. All other Climate Zones the maximum damper leak age at 1.0 inch w.g. is 10 cfm per square foot and for non-motorized damper s is 20 cfm per square foot of damper area.

Dampers smaller than 24 inches in either direction may have leakage of 40 cfm per square foot.

2.10.10 Air Deflectors and Branch Connections

Provide air deflectors at all duct mounted supply o utlets, at takeoff or extension collars to supply outlets, at duct branch takeoff connections, and at 90 degree elbows, as well as at locations as indicated on the drawings or otherwise specified. Conical branch co nnections or 45 degree entry connections are allowed in lieu of deflectors for branch connections. Furnish all air deflectors, except th ose installed in 90 degree elbows, with an approved means of adjustment . Provide easily accessible means for adjustment inside the duct or from an adjustment with sturdy lock on the face of the duct. When installe d on ducts to be thermally insulated, provide external adjustments w ith stand-off mounting brackets, integral with the adjustment device, to p rovide clearance between the duct surface and the adjustment device not less than the thickness of the thermal insulation. Provide factory-fabricated air deflectors consisting of curved turning vanes or louver blades designed to provide uniform air distribution and change of direction wi th minimum turbulence or pressure loss. Provide factory or field assembled air deflectors. Make adjustment from the face of the diffuser or by posi tion adjustment and lock external to the duct. Provide stand-off brackets o n insulated ducts as described herein. Provide fixed air deflectors, al so called turning vanes, in 90 degree elbows.

2.10.11 Plenums and Casings for Field-Fabricated Units

2.10.11.1 Plenum and Casings

Fabricate and erect plenums and casings as shown in SMACNA 1966, as applicable. Construct system casing of not less th an 16 gauge galvanized sheet steel. Furnish cooling coil drain pans with 1 inch threaded outlet to collect condensation from the cooling coils. Fa bricate drain pans from not lighter than 16 gauge steel, galvanized after f abrication or of 18 gauge corrosion-resisting sheet steel conforming to ASTM A167, Type 304, welded and stiffened. Thermally insulate drain pans expos ed to the atmosphere to prevent condensation. Coat insulation with a flame resistant waterproofing material. Provide separate drain pans for each ver tical coil section, and a separate drain line for each pan. Size pans to e nsure capture of entrained moisture on the downstream-air side of th e coil. Seal openings in the casing, such as for piping connections, to p revent air leakage.

Size the water seal for the drain to maintain a pre ssure of at least 2 inch water gauge greater than the maximum negative press ure in the coil space.

2.10.11.2 Casing

Terminate casings at the curb line and bolt each to the curb using galvanized angle, as indicated in SMACNA 1966.

2.10.11.3 Access Doors

Provide access doors in each section of the casing. Weld doorframes in

SECTION 23 00 00 Page 20 place, gasket each door with neoprene, hinge with m inimum of two brass hinges, and fasten with a minimum of two brass tens ion fasteners operable from inside and outside of the casing. Where possi ble, make doors 36 by 18 inches and locate them 18 inches above the floor. Where the space available does not accommodate doors of this size, use doors as large as the space accommodates. Swing doors so that fan su ction or pressure holds doors in closed position, airtight. Provide a push -button station, located inside the casing, to stop the supply.

2.10.11.4 Factory-Fabricated Insulated Sheet Metal Panels

Factory-fabricated components are allowed for field -assembled units, provided all requirements specified for field-fabri cated plenums and casings are met. Provide panels of modular design, pretested for structural strength, thermal control, condensation control, and acoustical control. Seal and insulate panel joints. Provide and gasket access doors to prevent air leakage. Provide panel construction that is not less than 20 gauge galvanized sheet steel, assembled with fas teners treated against corrosion. Provide standard length panels that def lect not more than 1/2 inch under operation. Construct details, including joint sealing, not specifically covered, as indicated in SMACNA 1966. Construct the plenums and casings to withstand the specified internal pre ssure of the air systems.

2.10.11.5 Duct Liner

Unless otherwise specified, duct liner is not permi tted.

2.10.12 Sound Attenuation Equipment

2.10.12.1 Systems with total pressure above 4 Inches Water Ga uge

Provide sound attenuators on the discharge duct of each fan operating at a total pressure above 4 inch water gauge, and, when indicated, at the intake of each fan system. Provide sound attenuators else where as indicated.

Provide factory fabricated sound attenuators, teste d by an independent laboratory for sound and performance characteristic s. Provide a net sound reduction as indicated. Maximum permissible pressu re drop is not to exceed

0.63 inch water gauge. Construct traps to be airti ght when operating under an internal static pressure of 10 inch water gauge. Provide air-side surface capable of withstanding air velocity of 10, 000 fpm. Certify that the equipment can obtain the sound reduction values specified after the equipment is installed in the system and coordinate d with the sound information of the system fan to be provided. Prov ide sound absorbing material conforming to ASTM C1071, Type I or II. Provide sound absorbing material that meets the fire hazard rating requirem ents for insulation specified in Section 23 07 00 THERMAL INSULATION FO R MECHANICAL SYSTEMS.

For connection to ductwork, provide a duct transiti on section. Factory fabricated double-walled internally insulated spira l lock seam and round duct and fittings designed for high pressure air sy stem can be provided if complying with requirements specified for factory f abricated sound attenuators, in lieu of factory fabricated sound at tenuators. Construct the double-walled duct and fittings from an outer m etal pressure shell of zinc-coated steel sheet, 1 inch thick acoustical bl anket insulation, and an internal perforated zinc-coated metal liner. Provi de a sufficient length of run to obtain the noise reduction coefficient sp ecified. Certify that the sound reduction value specified can be obtained within the length of duct run provided. Provide welded or spiral lock s eams on the outer sheet metal of the double-walled duct to prevent water va por penetration.

Provide duct and fittings with an outer sheet that conforms to the metal

SECTION 23 00 00 Page 21 thickness of high-pressure spiral and round ducts a nd fittings shown in SMACNA 1966. Provide acoustical insulation with a thermal con ductivity "k" of not more than 0.27 Btu/inch/square foot/hour/deg ree F at 75 degrees F mean temperature. Provide an internal perforated z inc-coated metal liner that is not less than 24 gauge with perforations no t larger than 1/4 inch in diameter providing a net open area not less than 10 percent of the surface.

2.10.12.2 System with total pressure of 4 Inch Water Gauge an d Lower

Use sound attenuators only where indicated. Provid e factory fabricated sound attenuators that are constructed of galvanize d steel sheets. Provide attenuator with outer casing that is not less than 22 gauge. Provide fibrous glass acoustical fill. Provide net sound r eduction indicated.

Obtain values on a test unit not less than 24 by 24 inches outside dimensions made by a certified nationally recognize d independent acoustical laboratory. Provide air flow capacity as indicate d or required. Provide pressure drop through the attenuator that does not exceed the value indicated, or that is not in excess of 15 percent o f the total external static pressure of the air handling system, whichev er is less.

Acoustically test attenuators with metal duct inlet and outlet sections while under the rated air flow conditions. Include with the noise reduction data the effects of flanking paths and vi bration transmission.

Construct sound attenuators to be airtight when ope rating at the internal static pressure indicated or specified for the duct system, but in no case less than 2 inch water gauge.

2.10.12.3 Acoustical Duct Liner

Use flexible elastomeric duct liner for lining duct work and conforming to the requirements of ASTM C1071, Type I and II. Provide uniform density, graduated density, or dual density liner compositio n, as standard with the manufacturer. Provide not less than 1 inch thick c oated lining. Where acoustical duct liner is used, provide the thermal equivalent of the insulation specified in Section 23 07 00 THERMAL IN SULATION FOR MECHANICAL SYSTEMS for liner or combination of liner and insul ation applied to the exterior of the ductwork. Increase duct sizes show n to compensate for the thickness of the lining used. In lieu of sheet met al duct with field-applied acoustical lining, provide acoustical ly equivalent lengths of elastomeric duct liner or factory fabricated double -walled internally insulated duct with solid liner.

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