21.5 HARB HVAC Specs.pdf

SPECIFICATIONS

for

Homestead Air Reserve Base Building-Level HVAC

Repairs, Modernization, and Retro-Commissioning for Multiple Projects

V 1.8 July 2019

These specifications have been specifically edited for conditions at Homestead Air Reserve Base (sub-tropical environment, high velocity wind zone, proximity to salt water) for heating, ventilation and air conditioning (HVAC) and to establish uniform energy management and control practices. This package is updated as needed by the 482 MSG/CEC. Except for firestopping, this specification package does not contain ancillary specifications such as repainting, concrete equipment pads, etc., which should be part of the contract package. It does not contain specifications for hot-water / boiler piping systems.

INDEX:

MASTER TEST, REPORTS, TRAINING AND DOCUMENTATION CHECKLIST

SECTION 07 84 00 FIRESTOPPING

SECTION 23 00 00 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS

(Includes HVAC System Cleaning)

SECTION 23 05 93 TESTING, ADJUSTING, AND BALANCING FOR HVAC

SECTION 23 07 00 THERMAL INSULATION FOR MECHANICAL SYSTEMS

(Includes underground refrigerant piping)

SECTION 23 08 00.00 10 COMMISSIONING OF HVAC SYSTEMS

SECTION 23 09 23.13 X BACnet DIRECT DIGITAL CONTROL SYSTEMS FOR HVAC AT HOMESTEAD ARB (Includes User Interface, M&C Software, and Default Points Schedule)

SECTION 23 23 00 REFRIGERANT PIPING

SECTION 23 64 10 WATER CHILLERS, VAPOR COMPRESSION TYPE (≤100 TONS)

SECTION 23 64 26 CHILLED WATER PIPING SYSTEMS

(Includes underground chilled water piping)

SECTION 23 82 02.00 10 UNITARY HEATING AND COOLING EQUIPMENT

SECTION 26 20 00 INTERIOR DISTRIBUTION SYSTEM

(Includes general utility trenching)

SECTION 26 29 23 VARIABLE FREQUENCY DRIVE SYSTEMS UNDER 600 VOLTS

Each as Applicable:

[ ] Section 23 23 00 Refrigeration Piping Tests

[ ] Section 23 64 26 Piping Welds NDE Report

[ ] Section 23 64 26 Pressure Test Reports

[ ] Section 23 64 10 System Performance Test (Chillers)

[ ] Section 23 82 02.00 10 Refrigerant Tests, Charging and Start-up

[ ] Section 23 82 02.00 10 System Performance Tests (CUs)

[ ] Section 26 20 00 Grounding System Test

[ ] Section 23 00 00 Damper Acceptance Test Report

[ ] Section 23 05 93 DALT Report

[ ] Section 23 05 93 TAB Equipment Qualifications

[ ] Section 23 05 93 TAB Schematic and Reprt Forms

[ ] Section 23 05 93 TAB Procedures Report

[ ] Section 23 05 93 Advance Notice of TAB

[ ] Section 23 05 93 TAB Execution

[ ] Section 23 05 93 TAB Report

[ ] Section 23 05 93 TAB Verification

[ ] Section 23 08 00.00 10 Functional Performance Tests

[ ] Section 23 09 23.13 X Control PVT Execution

Approved

Approved

[ ] Section 23 08 00.00 10

Commissioning Plan

[ ] Section 23 08 00.00 10

Commissioning Firm and Specialist

Approved

[ ] Section 23 05 93 TAB Firm and Qualifications

[ ] Section 23 05 93 Design Review Report

Notice to Proceed

[ ] Section 23 09 23.13 X Existing Conditions Report

[ ] Section 23 09 23.13 X Control System Shop Drawings

Approved

Approved

Approved

[ ] Section 23 08 00.00 10 Pre-Functional

Performance Test Checklists and Schedule

Approved

[ ] Section 23 08 00.00 10 Pre-Functional

Performance Test Execution

Approved

[ ] Section 23 09 23.13 X Controls PVT Plan

Approved

[ ] Section 23 09 23.13 X Controls Pre-PVT Checklist

Approved

Construction Phase

[ ] Multiple Sections: O&M Manuals (Hardware)

[ ] Multiple Sections: Field Training Schedule (Hardware)

Close-Out Submittals

[ ] Section 23 08 00.00 10 Commissioning Report

[ ] Section 23 09 23.13 X Controls PVT Report

[ ] Section 23 09 23.13 X Controls Training Submittal

[ ] Section 23 09 23.13 X Controls Training Execution

[ ] Multiple Sections: Field Training (Hardware)

Approved

Approved

Approved

Approved

[ ] 23 09 23.13 X O&M Manual (Controls)

Approved

Pre-Construction Phase

MASTER TEST, REPORTS, TRACKING AND DOCUMENTATION CHECKLIST FOR

SPECIFICATIONS FOR HOMESTEAD AIR RESERVE BASE BUILDING-LEVEL HVAC REPAIRS, MODERNIZATION, AND

RETRO-COMMISSIONING FOR MULTIPLE PROJECTS

SPECIFICATIONS for Homestead Air Reserve Base Building-Level HVAC Repairs, Modernization, and Retro-Commissioning for Multiple Projects V 1.8 July 2019

Section 07 84 00 Page 1

SECTION 07 84 00

FIRESTOPPING

05/10

PART 1 GENERAL

1.1 REFERENCES

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

ASTM INTERNATIONAL (ASTM)

ASTM E 814 (2008b) Standard Test Method for Fire Tests of Through-Penetration Fire Stops

ASTM E 84 (2013a) Standard Test Method for Surface Burning Characteristics of Building Materials

FM GLOBAL (FM)

FM APP Guide (Updated on-line) Approval Guide Fire Protection http://www.approvalguide.com/

UNDERWRITERS LABORATORIES (UL)

UL 1479 (2003; Reprint Oct 2012) Standard for Fire Tests of Through-Penetration Fire Stops

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

UL Fire Resistance (2012) Fire Resistance Directory

1.2 SYSTEM DESCRIPTION

Furnish and install tested and listed firestopping systems, combination of materials, or devices to form an effective barrier against the spread of flame, smoke and gases, and maintain the integrity of fire resistance rated walls, partitions, floors, and ceiling-floor assemblies. Through-penetrations include the annular space around pipes, tubes, conduit, wires, cables and vents.

1.3 SUBMITTALS

Submit the following in accordance with the Scope of Work:

SD-03 Product Data

Firestopping Materials

SD-07 Certificates

Section 07 84 00 Page 2

Firestopping Materials; Certificates attesting that firestopping material complies with the specified requirements. In lieu of certificates, drawings showing UL classified materials as part of a tested assembly may be provided. Drawings showing evidence of testing by an alternate nationally recognized independent laboratory may be substituted.

Installer Qualifications; Documentation of training and experience.

1.4 QUALITY ASSURANCE

Engage an experienced Installer who is FM Research approved in accordance with FM 4991, or certified, licensed, or otherwise qualified by the firestopping manufacturer as having the necessary staff, training, and a minimum of 3 years’ experience in the installation of manufacturer's products in accordance with specified requirements. The Installer shall have been trained by a direct representative of the manufacturer (not distributor or agent) in the proper selection and installation procedures.

1.5 DELIVERY, STORAGE, AND HANDLING

Deliver materials in the original unopened packages or containers showing name of the manufacturer and the brand name. Store materials off the ground, protected from damage and exposure to elements. Remove damaged or deteriorated materials from the site. Use materials within their indicated shelf life.

PART 2 PRODUCTS

2.1 FIRESTOPPING MATERIALS FOR THROUGH-PENETRATIONS

Provide firestopping materials consisting of commercially manufactured, asbestos-free and nontoxic products FM APP GUIDE approved, and complying with:

ASTM E 84 or UL 723 flame spread of 25 or less, ASTM E 84 or UL 723 smoke developed rating of 50 or less, Firestop systems shall provide "F" and "T" fire resistance ratings IAW ASTM E 814 or UL 1479, at least equal to fire-rating of fire wall or floor in which penetrated openings are to be protected, except that "F" rating may be 3 hours in through-penetrations of 4 hour fire rated wall or floor.

Nontoxic to humans at all stages of application or during fire conditions and shall not contain hazardous chemicals or require harmful chemicals to clean material or equipment. Firestop material must be free from Ethylene Glycol, PCB, MEK, or other types of hazardous chemicals.

PART 3 EXECUTION

3.1 PREPARATION

Areas to receive firestopping shall be free of dirt, grease, oil, or loose materials which may affect the fitting or fire resistance of the firestopping system.

3.2 INSTALLATION

Completely fill void spaces with tested and listed firestopping material regardless of geometric configuration, subject to tolerance established by the manufacturer. Firestopping systems for filling floor voids 4 inches or

Section 07 84 00 Page 3 more in any direction shall be capable of supporting the same load as the floor is designed to support or shall be protected by a permanent barrier to prevent loading or traffic in the firestopped area.

3.2.1 Insulated Pipes and Ducts

Wherever possible, apply firestopping materials, at penetrations of pipes and ducts, prior to insulating.

Thermal insulation shall be cut and removed where pipes or ducts pass through firestopping, unless insulation meets requirements specified for firestopping. Replace thermal insulation with a material having equal thermal insulating and firestopping characteristics.

3.2.2 Fire Dampers

Iinstall and firestop fire dampers in accordance with Section 23 00 00 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM.

3.2.3 Data and Communication Cabling

Cabling for data and communication applications shall be sealed with re-enterable firestopping products that do not cure over time. Firestopping shall be modular devices, containing built-in self-sealing intumescent inserts. Firestopping devices shall allow for cable moves, adds or changes without the need to remove or replace any firestop materials.

Section 23 00 00 Page 1

SECTION 23 00 00

AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS

08/10

(Includes HVAC Cleaning)

PART 1 GENERAL

1.1 REFERENCES

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

ACOUSTICAL SOCIETY OF AMERICA (ASA)

ASA S12.51 (2002) Acoustics Determination of Sound Power Levels of Noise Sources using Sound Pressure Precision Method for Reverberation Rooms

AIR MOVEMENT AND CONTROL ASSOCIATION INTERNATIONAL (AMCA)

AMCA 201 (2002) Fans and Systems

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

AMCA 220 (2005) Test Methods for Air Curtain Units

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

AMCA 301 (2006; INT 2007; Errata 2008) Methods for Calculating Fan Sound Ratings from Laboratory Test Data

AMCA 500-D (1998) Laboratory Methods of Testing Dampers for Rating

AIR-CONDITIONING, HEATING AND REFRIGERATION INSTITUTE (AHRI)

AHRI 260 (2001; Addendum 2002) Sound Rating of Ducted Air Moving and Conditioning Equipment

AHRI 350 (2009) Sound Rating of Non-Ducted Indoor Air-Conditioning Equipment

AHRI 410 (2001; Addendum 2002) Standard for Forced-Circulation Air-Cooling and Air-Heating Coils

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

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

AHRI 880 (2008) Standard for Air Terminals

AHRI 885 (2008) Procedure for Estimating Occupied Space Sound Levels in the Application of Air Terminals and Air Outlets

AHRI DCAACP (Online) Directory of Certified Applied Air-Conditioning Products

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

AMERICAN BEARING MANUFACTURERS ASSOCIATION (ABMA)

ABMA 11 (1990; R 1999) Load Ratings and Fatigue Life for Roller Bearings

ABMA 9 (1990; R 2000) Load Ratings and Fatigue Life for Ball Bearings

Section 23 00 00 Page 2

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE/SEI 7-05 (2005; R 2006) Minimum Design Loads for Buildings and Other Structures

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS (ASHRAE)

ASHRAE 52.2 (2007; Addenda B 2008; Errata 2009) Method of Testing General Ventilation Air- Cleaning Devices for Removal Efficiency by Particle Size

ASHRAE 62.1 (2007; INT 2007; INT 2-15 2008; Errata 2008; Addenda a, b, e, f and h 2008) Ventilation for Acceptable Indoor Air Quality

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

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

ASHRAE 90.1 – IP (2007; Supplement 2008; Errata 2009; Errata 2009) Energy Standard for Buildings Except Low-Rise Residential Buildings, I-P Edition

ASTM INTERNATIONAL (ASTM)

ASTM A 123/A 123M (2009) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A 167 (1999; R 2009) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip

ASTM A 53/A 53M (2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A 653 / A653M (2009) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc- Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM A 924/A 924M (2009a) Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

ASTM B 117 (2009) Standing Practice for Operating Salt Spray (Fog) Apparatus

ASTM B 209 (2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

ASTM B 221 (2008) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B 280 (2008) Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service

ASTM C 1071 (2005e1) Standard Specification for Fibrous Glass Duct Lining Insulation (Thermal and Sound Absorbing Material)

ASTM C 553 (2008) Standard Specification for Mineral Fiber Blanket Thermal Insulation for Commercial and Industrial Applications

ASTM D 1654 (2008) Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments

ASTM D 3359 (2009) Measuring Adhesion by Tape Test

ASTM D 520 (2000; R 2005) Zinc Dust Pigment

ASTM E 2016 (2006) Standard Specification for Industrial Woven Wire Cloth

ASTM F 1040 (1987; R 2007) Standard Specification for Filter Units, Air Conditioning, Viscous - Impingement and Dry Types, Replaceable

NATIONAL AIR DUCT CLEANERS ASSOCIATION (NADCA)

Assessment, Cleaning & Restoration of HVAC Systems (ACR 2005)

Section 23 00 00 Page 3

Understanding Microbial Contamination in HVAC Systems (1996)

Introduction to HVAC System Cleaning Services (2004)

Standard 05: Requirements for the Installation of Service Openings in HVAC Systems (2004)

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2008; TAI 08-1) National Electrical Code - 2008 Edition

NFPA 90A (2009; Errata 09-1) Standard for the Installation of Air Conditioning and Ventilating Systems

NFPA 5000 (2009) Building Construction and Safety Code

SHEET METAL AND AIR CONDITIONING CONTRACTORS' NATIONAL ASSOCIATION (SMACNA)

SMACNA 1143 (1985) HVAC Air Duct Leakage Test Manual

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

SMACNA 1966 (2005) HVAC Duct Construction Standards Metal and Flexible

U.S. DEPARTMENT OF DEFENSE (DOD)

MIL-STD-101(Rev B) Color Code for Pipelines & for Compressed Gas Cylinders

TELECOMMUNICATIONS INDUSTRY ASSOCIATION (TIA)

TIA-606 (2012b) Administration Standard for the Telecommunications Infrastructure

UNDERWRITERS LABORATORIES (UL)

UL 181 (2005; Rev thru Oct 2008) Standard for Factory-Made Air Ducts and Air Connectors

UL 1995 (2005; R 2009) Standard for Heating and Cooling Equipment

UL 214 (1997; Rev thru Aug 2001) Tests for Flame-Propagation of Fabrics and Films

UL 555 (2006; Rev thru Feb 2009) Standard for Fire Dampers

UL 555S (1999; Rev thru Mar 2009) Smoke Dampers

UL 705 (2004; Rev thru Mar 2009) Standard for Power Ventilators

UL 900 (2004; Rev thru Nov 2007) Standard for Air Filter Units

UL 94 (1996; Rev thru Jun 2006) Tests for Flammability of Plastic Materials for Parts in Devices and Appliances

UL Bld Mat Dir (2010) Building Materials Directory

UL Electrical Construction (2009) Electrical Construction Equipment Directory

UL Fire Resistance (2010) Fire Resistance Directory

1.2 SUBMITTALS

Submit the following in accordance with the Scope of Work:

SD-02 Shop Drawings

Section 23 00 00 Page 4

Detail Drawings (Design-Build or as Stated in the SOW): If not provided by the contract documents, investigate actual building design and provide detailed layout drawings of proposed ductwork and piping, air flow rates for all equipment and diffusers / registers / grilles, water flow rates, equipment capacities, etc.

SD-03 Product Data

Standard Products; manufacturer's catalog data included with the detail drawings for the following items. Highlight the data to show model, size, options, etc., that are intended for consideration.

Provide adequate data to demonstrate compliance with contract requirements for the following:

o Metallic Flexible Duct o Insulated Nonmetallic Flexible Duct Runouts o Duct Connectors o Duct Access Doors o Fire Dampers o Gravity Backdraft and Relief Dampers o Manual Balancing Dampers o Automatic Smoke-Fire Dampers o Automatic Smoke Dampers o Sound Attenuation Equipment o Acoustical Duct Liner o Diffusers o Registers and Grilles o Louvers o Air Vents, Penthouses, and Goosenecks o Fans (All Types) o Ventilators (All Types) o Air Handling Units o Fan-Coil Units o Variable Air Volume (VAV) or Terminal Units (All Types) o Energy Recovery Devices o HVAC System Cleaning Equipment, Products and MSDS

Operation and Maintenance Training; Proposed On-site Training schedule, submitted concurrently with the Operation and Maintenance Manuals.

SD-06 Test Reports

Damper Acceptance Test; Test report for the dampers within 2 weeks of completion of testing.

Provide as 8.5” x 11” 3-ring punched; also include as separate tab in Commissioning Report.

Post-cleaning Report

SD-07 Certificates

Miami-Dade Notice of Approval for louvers, penthouses, and all passive and active ventilators.

HVAC System Cleaning Contractor

Section 23 00 00 Page 5

SD-08 Manufacturer's Instructions

Manufacturer's Installation Instructions

Operation and Maintenance Training

SD-10 Operation and Maintenance Data

Operation and Maintenance Manuals; two manuals at least 2 weeks prior to field training, for each piece of mechanical equipment listed under SD-02 product data.

1.3 DELIVERY, STORAGE, AND HANDLING

Protect stored equipment at the jobsite from the weather, humidity and temperature variations, dirt and dust, or other contaminants. Additionally, cap or plug all pipes until installed.

1.4 QUALIFICATIONS OF HVAC SYSTEM CLEANING CONTRACTOR

1.4.1 Membership

The HVAC system cleaning contractor shall be a certified member of the National Air Duct Cleaners Association (NADCA), or shall maintain membership in a nationally recognized non-profit industry organization dedicated to the cleaning of HVAC systems.

1.4.2 Certification

The HVAC system cleaning contractor shall have a minimum of one (1) Air System Cleaning Specialist (ASCS) certified by NADCA on a full time basis, or shall have staff certified by a nationally recognized certification program and organization dedicated to the cleaning of HVAC systems.

1.4.3 Supervisor Qualifications

A person certified as an ASCS by NADCA, or maintaining an equivalent certification by a nationally recognized program and organization, shall be responsible for the total work herein specified.

1.4.4 Experience & Licensing

The HVAC system cleaning contractor shall provide proof of maintaining the proper state license(s) and be a firm regularly engaged in HVAC system maintenance with an emphasis on HVAC system cleaning and decontamination.

1.4.5 Equipment, Materials and Labor

The HVAC system cleaning contractor shall possess and furnish all necessary equipment, materials and labor to adequately perform the specified services.

The contractor shall assure that its employees have received safety equipment training, medical surveillance programs, individual health protection measures, and manufacturer’s product and material safety data

Section 23 00 00 Page 6 sheets (MSDS) as required for the work by the U.S. Occupational Safety and Health Administration, and as described by this specification. For work performed in countries outside of the U.S.A., contractors should comply with applicable national safety codes and standards.

The contractor shall maintain a copy of all current MSDS documentation and safety certifications at the site at all times, as well as comply with all other site documentation requirements of applicable OSHA programs and this specification

Contractor shall submit to the owner all Material Safety Data Sheets (MSDS) for all chemical products proposed to be used in the cleaning process.

PART 2 PRODUCTS

2.1 STANDARD PRODUCTS

Provide components and equipment that are "standard products" having been in satisfactory commercial or industrial use for 2 years before bid opening by a firm regularly engaged in the manufacture and distribution of products that are of a similar material, design and workmanship. Provide equipment items that are supported by a service organization. Where applicable, provide equipment that is an ENERGY STAR Qualified product or a Federal Energy Management Program (FEMP) designated product.

2.2 EQUIPMENT GUARDS AND ACCESS

Fully enclose or guard belts, pulleys, chains, gears, couplings, projecting setscrews, keys, and other rotating parts exposed to personnel contact according to OSHA requirements. Properly guard or cover with insulation of a type specified, high temperature equipment and piping exposed to contact by personnel or where it creates a potential fire hazard.

2.3 ELECTRICAL WORK

Provide motors, controllers, integral disconnects, contactors, and controls with their respective pieces of equipment, except controllers indicated as part of motor control centers. Provide electrical equipment, including motors and wiring, as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. Provide manual or automatic control and protective or signal devices required for the operation specified and control wiring required for controls and devices specified, but not shown. For packaged equipment, include manufacturer provided controllers with the required monitors and timed restart.

2.4 ANCHOR BOLTS

Provide anchor bolts for equipment placed on concrete equipment pads or on concrete slabs. Bolts to be of the size and number recommended by the equipment manufacturer and located by means of suitable templates. Installation of anchor bolts shall not degrade the surrounding concrete. Anchor bolts for outdoor locations shall be stainless steel. Anchor bolts for non-conditioned indoor locations shall be stainless steel of galvanized.

2.5 DUCT SYSTEMS

2.5.1 Metal Ductwork

Section 23 00 00 Page 7

Provide metal ductwork construction, including all fittings and components, that complies with SMACNA 1966 unless otherwise specified. Provide radius type elbows with a centerline radius of 1.5 times the width or diameter of the duct where space permits. Otherwise, elbows having a minimum radius equal to the width or diameter of the duct or square elbows with factory fabricated turning vanes are allowed. Provide ductwork that meets the following requirements of Seal Class unless otherwise indicated:

Duct Location SMACNA Seal Class

Outdoor supply ducts A

Outdoor return ducts A

Outdoor exhaust ducts C

Indoor supply ducts in unconditioned space (≤ 2” w.g.) B

Indoor supply ducts in unconditioned space (> 2” w.g.) A

Indoor exhaust ducts in unconditioned space C

Indoor return ducts in unconditioned space B

Indoor supply ducts upstream of VAVs A

Indoor supply ducts in conditioned space (≤ 2” w.g.) C

Indoor supply ducts in conditioned space (> 2” w.g.) B

Indoor exhaust ducts in conditioned space B

Indoor return ducts in conditioned space C

Provide sealants that conform to fire hazard classification specified in Section 23 07 00 THERMAL INSULATION FOR MECHANICAL SYSTEMS and are suitable for the range of air distribution and ambient temperatures to which it is exposed. Do not use pressure sensitive tape as a sealant. 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 duct fitting. Apply one brush coat of the sealant over the outside of the joint to at least 2 inch band width covering all screw heads and joint gap. Dents in the male portion of the slip fitting collar are not acceptable. Fabricate outdoor air intake ducts and plenums with watertight soldered or brazed joints and seams.

2.5.1.1 Metallic Flexible Duct

Provide only where indicated.

a. Provide duct that conforms to UL 181 and NFPA 90A with factory-applied insulation, vapor barrier, and end connections. Provide duct assembly that does not exceed 25 for flame spread and 50 for smoke developed. Proved ducts designed for working pressures of two inches water gauge positive and 1.5 inches water gauge negative. Provide flexible round duct length that does not exceed five feet unless expressly indicated in the statement of work or design drawings. Secure connections by applying adhesive for two inches over rigid duct, apply flexible duct two inches over rigid duct, apply metal clamp, and provide minimum of three No. 8 sheet metal screws through clamp and rigid duct.

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

Section 23 00 00 Page 8

c. Insulation: Provide a minimum of 1 inch-thick mineral fiber insulation between the inner duct core and manufacturer's standard exterior fire retardant vapor barrier jacket.

2.5.1.2 Insulated Nonmetallic Flexible Duct Runouts

Use flexible duct runouts only where indicated. Runout length is indicated on the drawings, and is not to exceed 5 feet unless expressly indicated in the statement of work or design drawings. Provide runouts that are preinsulated, factory fabricated, and that comply with NFPA 90A and UL 181. Provide either field or factory applied vapor barrier. Provide not less than 20 ounce glass fabric duct connectors coated on both sides with neoprene. Where coil induction or high velocity units are supplied with vertical air inlets, use a streamlined, vaned and mitered elbow transition piece for connection to the flexible duct or hose. Provide a die-stamped elbow and not a flexible connector as the last elbow to these units other than the vertical air inlet type. Insulated flexible connectors are allowed as runouts. Provide insulated material and vapor barrier that conform to the requirements of Section 23 07 00 THERMAL INSULATION FOR MECHANICAL SYSTEMS.

Do not expose the insulation material surface to the air stream.

2.5.1.3 General Service Duct Connectors

Provide a flexible duct connector approximately 6 inches in width where sheet metal connections are made to fans or where ducts 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 locked to metal collars using normal duct construction methods. Provide a composite connector system that complies with UL 214 and is classified as "flame-retarded fabrics" in UL Bld Mat Dir.

2.5.1.4 Duct Material

Unless otherwise indicated, duct metal shall follow the table below.

Supply ducts in mechanical rooms or attic spaces open to, or ventilated by, outdoor air

All other ducts

Stainless Steel ASTM A 167 X X

Galvanized ASTM A 653, min G90 X

Aluminum Sheet ASTM B 209 Alloy 3003-H14 sheet and 6061-T6 or equivalent for connectors and bar stock.

X X

2.5.2 Ductwork Accessories

2.5.2.1 Duct Access Doors

Provide hinged access doors conforming to SMACNA 1966 in ductwork, plenums, where indicated and at all air flow measuring primaries, automatic dampers, fire dampers, coils, thermostats, and other apparatus requiring service and inspection in the duct system. Access doors for smoke, fire and smoke/fire dampers shall comply with NFPA 5000 Chapter 8. Provide access doors upstream and downstream of air flow measuring primaries and heating and cooling coils. Provide doors with gaskets that match the surrounding seal class, and insulated to the same R-factor as the surrounding duct. Provide doors that are a minimum 15 x 18 inches, unless otherwise shown. Where duct size does not accommodate this size door, make the doors

Section 23 00 00 Page 9 as large as practicable, generally leaving 2-inches from each door edge to the duct corner. Doors shall have a minimum of two sash locks for hinged panels and four sash locks for removable panels. Exterior duct insulation shall not conceal duct access panels.

2.5.2.2 Fire Dampers

Provide where indicated and at duct penetrations in fire walls between occupied spaces and mechanical rooms. Use 1.5 hour rated fire dampers unless otherwise indicated. 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 installed pressure relief damper. Provide automatic operating fire dampers with a dynamic rating suitable for the maximum air velocity and pressure differential to which it is subjected.

Provide fire dampers approved for the 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 the operation of the damper. Equip sleeves or frames with perimeter mounting 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 curtain type with damper blades, out of the air stream, or single blade type (less than 1 SF cross section), or multi-blade type fire dampers. Install dampers that do not reduce the duct or the air transfer opening cross-sectional area. Install dampers so that the centerline of the damper depth or thickness is located in the centerline of the wall, partition or floor slab depth or thickness.

Unless otherwise indicated, comply with the installation details given in SMACNA 1819 and in manufacturer's instructions for fire dampers. Perform acceptance testing of fire dampers according to paragraph Fire Damper Acceptance Test and NFPA 90A.

2.5.2.3 Automatic Smoke Dampers

UL listed multiple blade type, supplied by smoke damper manufacturer, with factory-installed external damper operator as part of assembly. Qualified under UL 555S with a leakage rating no higher than Class III at an elevated temperature Category B (250°F for 30 minutes). Ensure that pressure drop in the damper open position does not exceed 0.1 in-w.g. with average duct velocities of 2500 fpm. Operators shall be a controlled spring-closure electric actuator type with either a (1) electric fuse link (EFL) that opens and closes the damper based on commands from the fire alarm system (default where the existing fire alarm system can support the capability or where upgrades to the fire alarm are stated or indicated) or (2) an electric resettable link (ERL) that may be reopened by pressing the manual reset button on the side of the damper sleeve. Damper shaft or actuator shall indicate damper position. Dampers shall shut within 15 seconds of loss of power / signal.

2.5.2.4 Automatic Smoke-Fire Dampers

UL listed multiple blade type, supplied by smoke or fire damper manufacturer, with factory-installed external damper operator and a 180°F fusible link as part of assembly. Qualified under UL 555S with a leakage rating no higher than Class III at an elevated temperature Category B (250°F for 30 minutes) and under UL555 as a 1.5-hour rated fire damper. Ensure that pressure drop in the damper open position does not exceed 0.1 in-w.g. with average duct velocities of 2500 fpm. Operators shall be a controlled spring-closure electric actuator type with either a (1) electric fuse link (EFL) that opens and closes the damper based on commands from the fire alarm system (default where the existing fire alarm system can support the capability or where upgrades to the fire alarm are stated or indicated) or (2) an electric resettable link (ERL) that may be reopened by

Section 23 00 00 Page 10 pressing the manual reset button on the side of the damper sleeve. Damper shaft or actuator shall indicate damper position. Dampers shall shut within 15 seconds of loss of power / signal.

2.5.2.5 Air Deflectors and Branch Connections

Provide air deflectors at all duct mounted supply outlets, 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 connections or 45 degree entry connections are allowed in lieu of deflectors for branch connections. Furnish all air deflectors, except those 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 installed on ducts to be thermally insulated, provide external adjustments with stand-off mounting brackets, integral with the adjustment device, to provide 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 with minimum turbulence or pressure loss. Provide factory or field assembled air deflectors. Make adjustment from the face of the diffuser or by position adjustment and lock external to the duct. Provide stand-off brackets on insulated ducts as described herein. Provide fixed air deflectors, also called turning vanes, in 90 degree elbows.

2.5.2.6 Gravity Backdraft and Relief Dampers

Frame shall be constructed of not less than 1-1/2- by 4-inch reinforced 16-gage galvanized carbon steel.

Frames and mullions shall be solidly secured in place and sealed with elastomer calking against air bypass.

Maximum blade width shall be 9 inches, and maximum blade length shall be 36 inches. Blade material shall be 16-gage galvanized steel, 14-gage 6063 or 5052 aluminum alloy, or 18-gage AISI 18-8 corrosion-resistant steel. Blades shall be provided with mechanically retained seals and 90-degree limit stops. Dampers used for relief service shall have blades linked together to open not less than 30 degrees on 0.05 inch wg differential pressure unless directed otherwise. Shaft bearings shall be graphite-impregnated nylon or oil-impregnated bronze. Counterbalanced dampers shall be equipped with fixed or adjustable counterbalancing weights.

Gravity backdraft dampers in sizes 18 inches or smaller, when furnished integral with air moving equipment, may be equipment manufacturer's standard construction.

2.5.2.7 Manual Balancing Dampers

Provide where indicated. Furnish manual balancing dampers with accessible operating mechanisms. Use chromium plated operators (with all exposed edges rounded) in finished portions of the building. Provide manual volume control dampers that are operated by locking-type quadrant operators. Install dampers that are 2 gauges heavier than the duct in which installed. Unless otherwise indicated, for all ducts with a width (parallel to axis of pivot) greater than 12 inches or a height greater than 6 inches, provide opposed blade type multileaf dampers with maximum blade width of 12 inches. Provide access doors or panels for all concealed damper operators and locking setscrews. Provide stand-off mounting brackets, bases, or adapters not less than the thickness of the insulation when the locking-type quadrant operators for dampers are installed on ducts to be thermally insulated, to provide clearance between the duct surface and the operator. Stand-off mounting items shall be integral with the operator or standard accessory of the damper manufacturer.

The leakage rate of manual balancing dampers when fully-closed shall be as follows:

Section 23 00 00 Page 11

Damper Use Max Leakage Rate at 1.0-in w.g. Static Pressure

Outside Air (all sizes) 20 cfm / sq-ft

All Others (≥ 2 sq-ft) 24 cfm / sq-ft

All Others (< 2 sq-ft) 40 cfm / sq-ft

2.5.2.8 Automatic Balance Dampers

Provide where indicated. Furnish IAW paragraph, “Manual Balance Dampers” except that the operator shall be IAW Section 23 09 23.13 X BACnet DIRECT DIGITAL CONTROL SYSTEMS FOR HVAC AT HOMESTEAD ARB paragraph, “Electric Actuators”.

2.5.2.9 Control Dampers

IAW Section 23 09 23.13 X BACnet DIRECT DIGITAL CONTROL SYSTEMS FOR HVAC AT HOMESTEAD ARB.

2.5.3 Diffusers, Registers, and Grilles

Provide factory-fabricated units of factory-painted steel, corrosion-resistant steel or aluminum except that painted steel diffusers shall not be used in mechanical rooms or other exfiltration spaces. Provide units that distribute the specified quantity of air evenly over space intended without causing noticeable drafts, air movement faster than 50 fpm in occupied zone, or dead spots anywhere in the conditioned area; Provide outlets for diffusion, spread, throw, and noise level as required for specified performance and sound ratings according to ASHRAE 70. Provide opposed-blade volume dampers where required with accessible operator, unless otherwise indicated. Provide linear slot diffusers with round or elliptical balancing dampers. Where the inlet and outlet openings are located less than 7 feet above the floor, protect them by a grille or screen according to NFPA 90A.

2.5.3.1 Rectangular Ceiling Diffusers (Supply)

a. Fixed-blade Deflector Diffusers: Unless otherwise indicated or stated, provide rectangular factory-fabricated air deflectors with fixed, curved or louvered blades designed to provide uniform air distribution and change of direction with minimum turbulence or pressure loss; diffusers shall not direct supply air onto a wall less than 3 feet away from its edge. Provide sponge rubber gaskets between ceiling and surface mounted diffusers for air leakage control. Provide manufacturer-recommended damper in diffuser for new or retrofit installations where branch balance dampers are not present. Make adjustment from the face of the diffuser or by position adjustment and lock external to the duct. Provide stand-off brackets on insulated ducts as described herein.

b. Perforated Plate Diffusers: Where directed or indicated, provide rectangular perforated plate diffusers with one-way, two-way, three-way, or four-way air pattern controls as indicated. If not indicated, provide diffusers that do not direct supply air onto a wall less than 3 feet away from its edge. Install ceiling mounted units with rims tight against ceiling. Provide sponge rubber gaskets between ceiling and surface mounted diffusers for air leakage control. Provide suitable trim for flush mounted diffusers. Provide butterfly damper in diffuser only if indicated or in retrofit installations where branch balance dampers are not present. Provide plenum box for diffusers with butterfly dampers and for diffusers over 600 CFM. For connecting the duct to diffuser or diffuser plenum box, provide duct collar that is airtight and does not interfere with volume controller.

2.5.3.2 Rectangular Ceiling Grilles (Return)

Section 23 00 00 Page 12

Provide perforated plate return grilles that appear similar to the perforated plate diffusers, in a color matching the ceiling finish, with a free area for the indicated air volume but no less than 50%.

2.5.3.3 Linear Diffusers (Supply)

Make joints between diffuser sections that appear as hairline cracks. Provide alignment slots for insertion of key strips or other concealed means to align exposed butt edges of diffusers. Equip with plaster frames when mounted in plaster ceiling. Do not use screws and bolts in exposed face of frames or flanges. Metal-fill and ground smooth frames and flanges exposed below ceiling. Furnish separate pivoted or hinged adjustable air-volume-damper and separate air-deflection blades.

2.5.3.4 Egg Crate Registers (Return or Exhaust)

Provide egg crate return or exhaust (intake) registers when stated or indicated area is less than 6” x 6” unless otherwise indicated. Provide suitable trim for flush mounted diffusers. Provide white finish unless specified otherwise. Provide opposed-blade damper in exhaust applications.

2.5.3.5 Registers (Supply, Return or Exhaust)

Provide louver type registers for all wall applications unless otherwise indicated, and in ceilings only if indicated. Louvers shall be fixed unless specified adjustable for 2- or 4-way directional control. For resisters used for supply, provide louver orientation as appropriate to prevent throwing air on surfaces less than 3 feet away. Provide OBD volume control in registers used for exhaust air. Provide OBD volume control in registers used for supply air only if indicated or in retrofit installations where branch balance dampers are not present.

Provide OBD volume control in registers used for return air only if indicated. Position all resisters at least 6-inches away from intersecting walls, floors or ceilings.

2.5.4 Sound Attenuation Equipment

Acoustical duct liners are not permitted.

Use sound attenuators only where indicated. Provide factory-fabricated sound attenuators that are constructed of galvanized metal matching the class of the surrounding duct, but in no case be less than 22 gauge. Size attenuator to provide air flow capacity indicated or required with a pressure drop less than 15% of the total external static pressure of the air handling system. Construct sound attenuators to be airtight when operating at the internal static pressure indicated or specified for the duct system, but in no case less than 2 inch water gauge.

Internal construction shall consist of perforated zinc-coated steel or aluminum sheets, or non-natural films encasing fibrous glass acoustical fill or other ASTM C 1071 Type I or II sound absorbing material that meets the fire hazard rating requirements for insulation specified in Section 23 07 00 THERMAL INSULATION FOR

MECHANICAL SYSTEMS.

Provide net sound reduction indicated. If not indicted, provide units meeting the insertion loss values below.

Obtain values on a test unit not less than 24 x 24 inches outside dimensions made by a certified nationally recognized independent acoustical laboratory. Acoustically test attenuators with metal duct inlet and outlet

Section 23 00 00 Page 13 sections while under the rated air flow conditions. Include with the noise reduction data the effects of flanking paths and vibration transmission.

OCTAVE BANDS

3RD 4TH 5TH 6TH 7TH

Frequency (hertz) 250 500 1,000 2,000 4,000

Min Power Level Loss(db) 25 45 45 45 35

2.5.5 Exterior Louvers, Air Vents, Penthouses, and Goosenecks

2.5.5.1 Materials and Finish

Provide exterior louvers, air vents, penthouses or gooseneck assemblies made from one of the following:

Galvanized metal. Steel sheets shall be commercial quality, zinc-coated steel (hot-dip galvanized) of quality established by ASTM A 653/A 653M, minimum G120 coating thickness.

Aluminum. Extrusions in alloy 6063, temper T5 in compliance with ASTM B 221, and/or aluminum sheet in alloy 5005, temper H15 or alloy 3003, temper H14 IAW ASTM B 209.

Stainless steel, 304 or 316.

Unless otherwise specified, galvanized and aluminum wall assemblies shall be factory-finished in Medium Bronze, and roof structures shall be unfinished.

2.5.5.2 4-Inches Diameter / Side or Less

Fabricate louvers, air vents, penthouses, and goosenecks that conform to SMACNA 1966. Accurately fit and secure louver blades to frames. Fold or bead edges of louver blades for rigidity and baffle these edges to exclude driving rain. Small stationary roof ventilators shall have a seamless spun conical-shaped weathercap, and shall have straight-through drainage for eliminating the possibility of air-borne debris collecting in the ventilator openings. Provide bird screens.

2.5.5.3 Larger than 4-Inches in Diameter / Side

Louvers and Roof Ventilators or Penthouses shall be pre-fabricated assemblies on the Miami-Dade Building Code Compliance Office (BCCO) approved building products list (http://www.buildingcodeonline.com) having a Miami-Dade Notice of Approval (NOA) for High Velocity Hurricane Zones and Large and Small Missile Impacts.

Wall louvers shall be rated for wind loads provided but in no case shall be less than of ±62 psf. All louvers shall have an AMCA Water Penetration Test rating of Class A (Effectiveness ≥ 0.99) for wind-driven rain ventilation core/free area of 689 fpm (7.8 mph) at a rainfall rate of 8 inches per hour with a 50 mph simulated wind velocity, and shall have a minimum free area velocity at the beginning point of water penetration of 1,200 fpm (14.2 mph). Louvers shall be provided with bird screens.

Roof Ventilators or Penthouses shall be rated for winds resulting from a 150 mph wind in accordance with ASCE/SEI 7-05, exposure category C, but in no case shall be less than ±62 psf. Roof Ventilators or Penthouses shall be sized to provide the stated or indicated free area uniform and continuous air flow at an air velocity below the rated beginning point of water penetration, with the lowest silhouette possible, shall be curb-http://www.buildingcodeonline.com/

Section 23 00 00 Page 14 mounted, have a dome-type roof unit equipped with waterproof top and louvers around the sides that meet the same wind-driven rain criteria as wall louvers above. The penthouse top, sides, supporting framework, louvers and screens shall be made of the same material. Dissimilar fastener connections shall be protected with neoprene or nylon gaskets. Provide a removable or hinged roof construction. Internally brace the unit to prevent parallelogram deformation. Penthouses shall include provisions for lightning protection air terminal attachments and bonding. Provide curb tie-downs and bird screens. Provide insect or filter screens only if indicated.

2.5.6 Bird Screens and Frames

Provide bird screens that conform to ASTM E 2016, No. 2 mesh, aluminum or stainless steel. Provide "medium-light" rated aluminum screens. Provide "light" rated stainless steel screens. Provide removable type frames fabricated from either stainless steel or extruded aluminum.

2.6 AIR SYSTEMS EQUIPMENT (NOT INCL FACTORY-FABRICATED AHUs EXCEPT WHERE REFERENCED)

2.6.1 Fans

Test and rate fans according to AMCA 210. Calculate system effect on air moving devices in accordance with AMCA 201 where installed ductwork differs from that indicated on drawings. Install air moving devices to minimize fan system effect. Where system effect is unavoidable, determine the most effective way to accommodate the inefficiencies caused by system effect on the installed air moving device. The sound power level of the fans shall not exceed 85 dBA when tested according to AMCA 300 and rated in accordance with AMCA 301. Provide all fans with an AMCA seal. Connect fans to the motors either directly or indirectly with V-belt drive. Use V-belt drives designed for not less than 140 percent of the connected driving capacity.

Provide variable pitch motor sheaves for 15 hp and below, and fixed pitch as defined by AHRI Guideline D.

Select variable pitch sheaves to drive the fan at a speed which can produce the specified capacity when set at the approximate midpoint of the sheave adjustment. When fixed pitch sheaves are furnished, provide a replaceable sheave when needed to achieve system air balance. Provide motors for V-belt drives with adjustable rails or bases. Provide removable metal guards for all exposed V-belt drives, and provide speed-test openings at the center of all rotating shafts. Provide fans with personnel screens or guards on both suction and supply ends, except that the screens need not be provided, unless otherwise indicated, where ducts are connected to the fan. Provide fan and motor assemblies with vibration-isolation supports or mountings as indicated. Use vibration-isolation units that are standard products with published loading ratings. Select each fan to produce the capacity required at the fan static pressure indicated. Provide sound power level as indicated. Obtain the sound power level values according to AMCA 300. Provide standard AMCA arrangement, rotation, and discharge as indicated. Provide power ventilators that conform to UL 705 and have a UL label.

Fan efficiency requirements for fans with a total fan system power of 1 h.p. to 5 h.p. must be at least 30% better the level required by ASHRAE 90.1-2007.

Fan efficiency requirements for fans with a total fan system power exceeding 5 h.p. shall have a nameplate motor power: equal to or less than 1.2 h.p. / 1,000 cfm (for constant volume fans moving less than 20,000 cfm), equal to or less than 1.7 h.p. / 1,000 cfm (for variable volume fans moving less than 20,000 cfm), equal to or less than 1.1 h.p. / 1,000 cfm (for constant volume fans moving 20,000 cfm or more), equal to or less than 1.5 h.p. / 1,000 cfm (for variable volume fans moving 20,000 cfm or more).

Section 23 00 00 Page 15

2.6.1.1 In-Line Centrifugal Fans

Provide in-line fans with centrifugal backward inclined blades, stationary discharge conversion vanes, internal and external belt guards, and adjustable motor mounts. Mount fans in a welded tubular casing. Provide a fan that axially flows the air in and out. Streamline inlets with conversion vanes to eliminate turbulence and provide smooth discharge air flow. Enclose and isolate fan bearings and drive shafts from the air stream.

Provide precision, self aligning ball or roller type fan bearings that are sealed against dust and dirt and are permanently lubricated. Provide either sealed fan bearings rated at not less than 100,000 hours, or lubricated L50 fan bearings rated at not less than 200,000 hours as defined by ABMA 9 and ABMA 11.

Provide motors drip-proof enclosures unless specified totally enclosed or otherwise.