23 00 00 AIR SUPPLY DISTRIBUTION VENTILATION AND EXHAUST SYSTEMS Specs.pdf

IDG Updated: 16 April 2021

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DIVISION 23 – HEATING, VENTILATING, AND AIR CONDITIONING (HVAC)

SECTION – 23 00 00

AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS

PART 1 GENERAL

1.1 SYSTEM DESCRIPTION: Provide complete and useable systems. Furnish ductwork, piping offsets, fittings, and accessories as required to provide a complete installation.

Coordinate the work of the different trades to avoid interference between piping, equipment, structural, and electrical work. Provide complete, in place, all necessary offsets in piping and ductwork, and all fittings, and other components, required to install the work as indicated and specified. System shall conform to the requirements of UFC 1-

200-02, system shall achieve energy consumption levels that are at least 30 percent below the baseline established in the 2010 publication of ASHRAE 90.1.

1.2 SUBMITTALS: The contractor shall provide to the Directorate of Public Works

Operations and Maintenance Division HVAC Work Leader and tech serving the building the following:

a. SD-08 Manufacturer's Instructions:

i. Manufacturer's Installation Instructions

ii. Operation and Maintenance Training

b. SD-10 Operation and Maintenance Data:

i. Operation and Maintenance Manuals

ii. Ductwork Leak Test

iii. Performance Tests

1.3 MANUFACTURES WARRANTY: Provide the following warranty’s on equipment:

a. Chillers: Provide the manufacturers 10 year warranty for Parts, Labor, and

Refrigerant.

1.4 HVAC SUPERINTENDENT QUALIFICATIONS: Engage a licensed mechanical contractor with not less than 10 years consecutive successful experience in HVAC installations similar in size and type to the HVAC requirements of the project.

1.5 COORDINATION OF WORK: Coordinate the work with other trades to ensure that all system components are synchronized with other disciplines.

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1.6 DELIVERY, STORAGE, AND HANDLING: Deliver materials in the manufacturer's unopened bundles and containers bearing the manufacturer's brand name. Protect stored equipment at the jobsite from the weather, humidity and temperature variations, dirt and dust, or other contaminants. Cap or plug all pipes until installed. Store according to manufacturer's written instructions.

1.7 UMCS DDC INTEGRATION: The contractor shall provide a fully integrated controls system that is compatible with the installations existing infrastructure.

a. Integration

i. Integration of the listed equipment, and associated data points, to the existing Fort Bragg UMCS front end in accordance with the Fort Bragg

System Integration Methodology.

ii. Includes importing (from the Mechanic contractor or prime contractor provided); LNS database into the Fort Bragg UMCS system.

iii. Updating Fort Bragg’s master riser diagram with control and mechanical floor plan drawings.

iv. Importing LNS database and resource files such as XIF file.

v. Generate graphics as necessary to represent the equipment listed above from controls and mechanical drawings.

vi. Verification of communication back to UMCS and demonstrate integration of listed systems and graphics once, at the Contractors PVT

b. General

i. Controls: Provide compliant LON-Works controls.

1. Any existing integrated equipment shall remain intact and properly connected to the new LON communication network or be replaced by as a requirement of the PWS; including any utility meters currently installed within the facility.

2. All new controls equipment will be properly connected to the existing or new LON communication network Building Point of

Connection (BPOC) and connected via Ethernet cable to the NEC switch.

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3. All new controls equipment shall be connected properly to the existing or new verify in field LON and Ethernet communication network by the installing contractor

ii. Network: Install the LON cabling (with approved and listed LON cable) in bus topology to all controls (including any existing utility water, gas or electric meters or HVAC controls), with appropriate EOL resistors to a

UFGS 23 09 23 compliant and approved BPOC with an Ethernet cable from the BPOC to the correct NEC switch. JCBAS will assist the contractor in determining which NEC is the correct switch and will program the BPOC if one is not existing, but will not provide the BPOC or wiring without a separate contract. The NEC switch must be installed by

NEC or their assigned contractor and will not be included in any JCBAS proposals. Additional information for properly installing the LON network and cabling is shown below.

1. Only Bus Topology is acceptable as shown below with EOL terminators:

2. Install them in a daisy chain as shown above and twist the two (2) wires together at least three (3) times, then stick them under the terminal and tighten them snug. Pull on each wire to ensure the connection is tight enough, but not too much to strip the terminal screw. A device/node should be wired to the network as shown in the picture below:

3. If only one cable is connected on a device, that should be the end of line and a EOL terminator should be installed on it. There can only be two

(2) ends on a segment. We should not be making a T-tap / ‘stub’ connections where only one cable is installed under the terminals of a device as shown below:

4. Our preference is Belden 85102 Plenum rated, unshielded wire because it allows for the longest length due to the quality of the cable. At a minimum, you must use an Echelon approved cable or proven equal as listed in either table below:

iii. Database: Provide a fully commissioned, Government approved, LNS

Database with associated resource files to include XIF and hardware Plug-ins. The contractor needs to verify if an existing UMCS database exists and add their new controls to the existing database as determined by the

UMCS Manager.

1. Prior to the integration work the contractor shall provide a fully commissioned LNS Database with associated hardware drawings/point schedules, control drawings, resource files to

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include XIF and hardware Plug-ins. This will be reviewed and approved by the Fort Bragg UMCS Manager prior to integration activities.

iv. Control Drawings: Provide a set of control drawings with associated hardware bill of materials (BOM) and point schedules. We should be able to reference every set-point and hardware point on the control drawings to the database provided. This set or sets, need to include the work being performed by the contractor and any existing equipment that is to be integrated.

v. Mechanical Drawings: Provide a set of mechanical drawings; including floorplans with accurate room numbers that show the locations of the thermostats and ductwork as applicable so the ‘zone’ each thermostat serves can be identified. (For example, if you have a row of offices served by a VAV box with the thermostat in room 100, we need the ductwork drawings showing that that VAV box also serves rooms 101-105 so if an occupant in room 105 calls in a work-order to DPW, they will know it is served by the thermostat in room 100). This set or sets, need to include the work being performed by the contractor and any existing equipment that is to be integrated.

1. Provide control and mechanical drawings with zoning floorplans even when installed by others for any equipment to be integrated.

PART 2 PRODUCTS

2.1 GENERAL: 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. "Standard products" is defined as being in satisfactory commercial or industrial use for 2 years before bid opening, including applications of components and equipment under similar circumstances and of similar size, satisfactorily completed by a product that is sold on the commercial market through advertisements, manufacturers' catalogs, or brochures. Products having less than a 2-year field service record are acceptable if a certified record of satisfactory field operation, for not less than

6000 hours exclusive of the manufacturer's factory tests, can be shown. 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 listed on the ENERGY STAR Qualified Products List or that meets or exceeds the FEMP-designated Efficiency Requirements.

a. Chillers basis of design is as follows:

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i. Air Cooled chillers: Trane, Daikin, Carrier (Except RAP models) or Artic

Chill,

ii. Geo thermal/modular chillers: Multistack or Artic Chill

iii. Water cooled Chillers: York, Daikin, Trane or Carrier

b. Boilers basis of design is as follows:

i. Condensing boilers: Lochinvar, Raypak, LAARS, Weil-Mclain or RBI

ii. Non-Condensing boilers: Weil-Mclain, Smith, Superior, or Peerless

iii. Burners: Webster, Power Flame or Riello

c. Air Handling Units

i. Trane, Carrier, Daikin or York

d. Fan coil units basis of design is as follows:

i. Trane, Daikin, Carrier, Enviro-tec or International

2.2 IDENTIFICATION PLATES: In addition to standard manufacturer's identification plates, provide engraved laminated phenolic identification plates for each piece of mechanical equipment. Identification plates are to designate the function of the equipment. Submit designation with the shop drawings. Provide identification plates that are layers, black-white-black, engraved to show white letters on black background.

Letters must be upper case. Identification plates that are 1.5-inches high and smaller must be 0.0625-inch thick, with engraved lettering 0.125-inch high; identification plates larger than 1.5-inches high must be 0.125-inch thick, with engraved lettering of suitable height.

Identification plates 1.5-inches high and larger must have beveled edges. Install identification plates using a compatible adhesive.

2.3 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.

2.4 ELECTRICAL WORK:

a. Provide motors, controllers, integral disconnects, contactors, and controls with their respective pieces of equipment, except controllers indicated as part of motor control centers. Provide manual or automatic control and protective or signal devices required for the operation specified and control wiring required for

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controls and devices specified, but not shown. For packaged equipment, include manufacturer provided controllers with the required monitors and timed restart.

b. For single-phase motors, provide high-efficiency type, fractional-horsepower alternating-current motors, including motors that are part of a system, in accordance with NEMA MG 11. Provide premium efficiency type integral size motors in accordance with NEMA MG 1.

c. For polyphase motors, provide squirrel-cage medium induction motors, including motors that are part of a system, and that meet the efficiency ratings for premium efficiency motors in accordance with NEMA MG 1. Select premium efficiency polyphase motors in accordance 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 exceeding the nameplate rating of the motor. Provide motors rated for continuous duty with the enclosure specified.

Provide motor duty that allows for maximum frequency start-stop operation and minimum encountered interval between start and stop. Provide motor torque capable of accelerating the connected load within 20 seconds with 80 percent of the rated voltage maintained at motor terminals during one starting period.

Provide motor starters complete with thermal overload protection and other necessary appurtenances. Fit motor bearings with grease supply fittings and grease relief to outside of the enclosure.

e. Where two-speed or variable-speed motors are indicated, solid-state variable-speed controllers are allowed to accomplish the same function. Use solid-state variable-speed controllers for motors rated 7 10 hp or less and adjustable frequency drives for larger motors.

2.5 EQUIPMENT PADS: Equipment shall be mounted to a reinforced concrete pad 6-inches thick minimum but not less than 3-inches thicker than the equipment manufacturers specified anchor bolts. Concrete shall be reinforced with #4 60 KSI reinforcing bars at

16-inches on center each way minimum. Size pads IAW manufactures recommendation for the equipment.

2.6 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 must not degrade the surrounding concrete.

2.7 SEISMIC ANCHORAGE: Anchor equipment in accordance with applicable seismic criteria for the area and as defined in SMACNA 1981

2.8 PAINTING AND EQUIPMENT ENCLOSURE: Paint equipment units in accordance with approved equipment manufacturer's standards unless specified otherwise. Field retouch only if approved. Otherwise, return equipment to the factory for refinishing.

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Exterior mechanical equipment shall be coated FS-20059 (Mission Brown), shall be in a brick masonry enclosure, or shall be enclosed with a vinyl coated steel chain-link fence with matching plastic slats color FS-20059 (Mission Brown), enclosed equipment shall have appropriate clearances.

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

a. Metal Duct

i. 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.

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

iii. Provide sealants that conform to fire hazard classification specified 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.

Provide duct sealant products that meet either emissions requirements of

CDPH SECTION 01350 (limit requirements for either office or classroom spaces regardless of space type) or VOC content requirements of

SCAQMD Rule 1168 (HVAC duct sealants are classified as "Other" within the SCAQMD Rule 1168 sealants table). Provide validation of indoor air quality for duct sealants.

iv. 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.

v. Fabricate outdoor air intake ducts and plenums with watertight soldered or brazed joints and seams.

b. Metallic Flexible Duct

i. Provide duct that conforms to UL 181 and NFPA 90A with factory-applied insulation, vapor barrier, and end connections. Provide duct

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assembly that does not exceed 25 for flame spread and 50 for smoke developed. Provide ducts designed for working pressures of 497 Pa 2-inches water gauge positive and 373 Pa 1.5-inches water gauge negative.

Provide flexible round duct length that does not exceed 5-feet. Secure connections by applying adhesive for 2-inches over rigid duct, apply flexible duct 2-inches over rigid duct, apply metal clamp, and provide minimum of three No. 8 sheet metal screws through clamp and rigid duct.

ii. 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.

iii. Insulation: Provide inner duct core that is insulated with mineral fiber blanket type flexible insulation, minimum of 1-inch thick. Provide insulation covered on exterior with manufacturer's standard fire retardant vapor barrier jacket for flexible round duct.

c. Insulated Nonmetallic Flexible Duct Runouts

i. Use flexible duct runouts only where indicated. Runout length is indicated on the drawings, and is not to exceed 5 feet. 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 0.60 L 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. Do not expose the insulation material surface to the air stream.

d. Finish

i. Provide Mill Galvanized finish except provide painted duct work where exposed in the finished work to match the specified ceiling color.

2.10 DIFFUSERS, REGISTERS, AND GRILLES: Provide factory-fabricated units of aluminum that distribute the specified quantity of air evenly over the 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. Certify performance according to

ASHRAE 70. Provide sound rated and certified inlets and outlets according to ASHRAE

70. Provide sound power level as indicated. Provide diffusers and registers with volume damper with accessible operator, unless otherwise indicated; or if standard with the manufacturer, an automatically controlled device is acceptable. Provide opposed blade

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type volume dampers for all diffusers and registers, except linear slot diffusers. 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.

a. Diffusers

i. Provide diffuser types indicated. Furnish ceiling mounted units with anti-smudge devices, unless the diffuser unit minimizes ceiling smudging through design features. Provide diffusers with air deflectors of the type indicated. Provide air handling troffers or combination light and ceiling diffusers conforming to the requirements of UL Electrical Construction for the interchangeable use as cooled or heated air supply diffusers or return air units. 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. For connecting the duct to diffuser, provide duct collar that is airtight and does not interfere with volume controller. Provide return or exhaust units that are similar to supply diffusers.

b. Registers and Grilles

i. Provide units that are four-way directional-control type, except provide return and exhaust registers that are fixed horizontal or vertical louver type similar in appearance to the supply register face. Furnish registers with sponge-rubber gasket between flanges and wall or ceiling. Install wall supply registers at least 6-inches below the ceiling unless otherwise indicated. Locate return and exhaust registers 6-inches above the floor unless otherwise indicated. Achieve four-way directional control by a grille face which can be rotated in 4 positions or b adjustment of horizontal and vertical vanes. Provide grilles as specified for registers, without volume control damper.

PART 3 EXECUTION

3.1 EXAMINATION: After becoming familiar with all details of the work, verify all dimensions in the field, and advise the Contracting Officer of any discrepancy before performing the work.

3.2 INSTALLATION:

a. General

i. Install materials and equipment in accordance with the requirements of the contract drawings and approved manufacturer's installation instructions.

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Accomplish installation by workers skilled in this type of work. Perform installation so that there is no degradation of the designed fire ratings of walls, partitions, ceilings, and floors.

ii. No installation is permitted to block or otherwise impede access to any existing machine or system. Install all hinged doors to swing open a minimum of 120 degrees. Provide an area in front of all access doors that clears a minimum of 3-feet. In front of all access doors to electrical circuits, clear the area the minimum distance to energized circuits as specified in OSHA Standards, part 1910.333 (Electrical-Safety Related work practices) and an additional 3-feet.

iii. Except as otherwise indicated, install emergency switches and alarms in conspicuous locations. Mount all indicators, to include gauges, meters, and alarms in order to be easily visible by people in the area.

b. Condensate Drain Lines: Provide water seals in the condensate drain from all units. Provide a depth of each seal of 2 inches plus the number of inches measured in water gauge, of the total static pressure rating of the unit to which the drain is connected. Provide water seals that are constructed of 2 tees and an appropriate

U-bend with the open end of each tee plugged. Provide pipe cap or plug cleanouts where indicated. Connect drains indicated to connect to the sanitary waste system using an indirect waste fitting.

c. Equipment and Installation: Provide frames and supports for tanks, compressors, pumps, valves, air handling units, fans, coils, dampers, and other similar items requiring supports. Floor mount or ceiling hang air handling units as indicated.

Anchor and fasten as detailed. Set floor-mounted equipment on not less than 6-inch concrete pads or curbs doweled in place unless otherwise indicated. Make concrete foundations heavy enough to minimize the intensity of the vibrations transmitted to the piping, duct work and the surrounding structure, as recommended in writing by the equipment manufacturer. In lieu of a concrete pad foundation, build a concrete pedestal block with isolators placed between the pedestal block and the floor. Make the concrete foundation or concrete pedestal block a mass not less than three times the weight of the components to be supported. Provide the lines connected to the pump mounted on pedestal blocks with flexible connectors.

d. Access Panels: Install access panels for concealed valves, vents, controls, dampers, and items requiring inspection or maintenance of sufficient size, and locate them so that the concealed items are easily serviced and maintained or completely removed and replaced.

e. Flexible Duct: Install pre-insulated flexible duct in accordance with the latest printed instructions of the manufacturer to ensure a vapor tight joint. Provide

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hangers, when required to suspend the duct, of the type recommended by the duct manufacturer and set at the intervals recommended.

f. Metal Ductwork: Install according to SMACNA 1966 unless otherwise indicated.

Install duct supports for sheet metal ductwork according to SMACNA 1966, unless otherwise specified. Do not use friction beam clamps indicated in

SMACNA 1966. Anchor risers on high velocity ducts in the center of the vertical run to allow ends of riser to move due to thermal expansion. Erect supports on the risers that allow free vertical movement of the duct. Attach supports only to structural framing members and concrete slabs. Do not anchor supports to metal decking unless a means is provided and approved for preventing the anchor from puncturing the metal decking. Where supports are required between structural framing members, provide suitable intermediate metal framing. Where C-clamps are used, provide retainer clips.

g. Dust Control: To prevent the accumulation of dust, debris and foreign material during construction, perform temporary dust control protection. Protect the distribution system (supply and return) with temporary seal-offs at all inlets and outlets at the end of each day's work. Keep temporary protection in place until system is ready for startup.

3.3 EQUIPMENT PADS: Provide equipment pads to the dimensions shown or, if not shown, to conform to the shape of each piece of equipment served with a minimum 3-inch margin around the equipment and supports. Allow equipment bases and foundations, when constructed of concrete or grout, to cure a minimum of 28 calendar days before being loaded.

3.4 CUTTING AND PATCHING: Install work in such a manner and at such time that a minimum of cutting and patching of the building structure is required. Make holes in exposed locations, in or through existing floors, by drilling and smooth by sanding. Use of a jackhammer is permitted only where specifically approved. Make holes through masonry walls to accommodate sleeves with an iron pipe masonry core saw.

3.5 CLEANING: Thoroughly clean surfaces of piping and equipment that have become covered with dirt, plaster, or other material during handling and construction before such surfaces are prepared for final finish painting or are enclosed within the building structure. Before final acceptance, clean mechanical equipment, including piping, ducting, and fixtures, and free from dirt, grease, and finger marks. When the work area is in an occupied space protect all furniture and equipment from dirt and debris. Incorporate housekeeping for field construction work which leaves all furniture and equipment in the affected area free of construction generated dust and debris; and, all floor surfaces vacuum-swept clean.

3.6 PENETRATIONS: Provide sleeves and prepared openings for duct mains, branches, and other penetrating items, and install during the construction of the surface to be penetrated.

Cut sleeves flush with each surface. Place sleeves for round duct 15 inches and smaller.

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Build framed, prepared openings for round duct larger than 15 inches and square, rectangular or oval ducts. Sleeves and framed openings are also required where grilles, registers, and diffusers are installed at the openings. Provide 1-inch clearance between penetrating and penetrated surfaces except at grilles, registers, and diffusers. Pack spaces between sleeve or opening and duct or duct insulation with mineral fiber conforming with

ASTM C553, Type 1, Class B-2

a. Fabricate sleeves, except as otherwise specified or indicated, from 20 gauge thick mill galvanized sheet metal. Where sleeves are installed in bearing walls or partitions, provide black steel pipe conforming with ASTM A53/A53M, Schedule

20.

b. Framed Prepared Openings: Fabricate framed prepared openings from 20 gauge galvanized steel, unless otherwise indicated.

c. Insulation: Provide duct insulation continuous through sleeves and prepared openings except firewall penetrations. Terminate duct insulation at fire dampers and flexible connections. For duct handling air at or below 60 degrees F, provide insulation continuous over the damper collar and retaining angle of fire dampers, which are exposed to unconditioned air.

d. Closure Collars: Provide closure collars of a minimum 4-inches wide, unless otherwise indicated, for exposed ducts and items on each side of penetrated surface, except where equipment is installed. Install collar tight against the surface and fit snugly around the duct or insulation. Grind sharp edges smooth to prevent damage to penetrating surface. Fabricate collars for round ducts 15 inches in diameter or less from 20 gauge galvanized steel. Fabricate collars for square and rectangular ducts, or round ducts with minimum dimension over 15 inches from 18 gauge galvanized steel. Fabricate collars for square and rectangular ducts with a maximum side of 15 inches or less from 20 gauge galvanized steel. Install collars with fasteners a maximum of 6 inches on center. Attach to collars a minimum of 4 fasteners where the opening is 12 inches in diameter or less, and a minimum of 8 fasteners where the opening is 500 mm 20 inches in diameter or less.

e. Firestopping: Where ducts pass through fire-rated walls, fire partitions, and fire rated chase walls, seal the penetration with fire stopping materials.

3.7 COLOR CODING SCHEME FOR LOCATING HIDDEN UTILITY COMPONENTS:

Use scheme in buildings having suspended grid ceilings. Provide color coding scheme that identifies points of access for maintenance and operation of components and equipment that are not visible from the finished space and are accessible from the ceiling grid, consisting of 0.375-inch diameter and secure to removable ceiling panels with fasteners. Insert each fastener into the ceiling panel so as to be concealed from view

Provide fasteners that are manually removable without the use of tools and that do not separate from the ceiling panels when the panels are dropped from ceiling height. Make

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installation of colored metal disks follow completion of the finished surface on which the disks are to be fastened. Provide color code board that is approximately3 foot wide 30 inches high, 0.5-inches thick. Make the board of wood fiberboard and frame under glass or 0.0625-inch transparent plastic cover. Make the color code symbols approximately

0.75 inch in diameter and the related lettering in 0.5-inch high capital letters. Mount the color code board in the mechanical room.

3.8 IDENTIFICATION SYSTEMS: Provide identification tags made of brass, engraved laminated plastic, or engraved anodized aluminum, indicating service and item number on all valves and dampers. Provide tags that are 1.375-inch minimum diameter with stamped or engraved markings. Make indentations black for reading clarity. Attach tags to valves with No. 12 AWG 2 mm 0.0808-inch diameter corrosion-resistant steel wire, copper wire, chrome-plated beaded chain or plastic straps designed for that purpose.

3.9 DUCTWORK LEAK TEST: Perform ductwork leak test for the entire air distribution and exhaust system, including fans, coils, filters, etc. Provide test procedure, apparatus, and report that conform to SMACNA 1972 CD. The maximum allowable leakage rate shall be determined based on procedure outlined in SMACNA 1972 CD for Seal Class A.

Complete ductwork leak test with satisfactory results prior to applying insulation to ductwork exterior or concealing ductwork.

3.10 TESTING, ADJUSTING, AND BALANCING: Begin testing, adjusting, and balancing only when the air supply and distribution, including controls, has been completed, with the exception of performance tests.

3.11 PERFORMANCE TESTS: After testing, adjusting, and balancing is complete as specified, test each system as a whole to see that all items perform as integral parts of the system and temperatures and conditions are evenly controlled throughout the building.

Record the testing during the applicable season. Make corrections and adjustments as necessary to produce the conditions indicated or specified. Conduct capacity tests and general operating tests by an experienced engineer. Provide tests that cover a period of not less than 5 days for each system and demonstrate that the entire system is functioning according to the specifications. Make coincidental chart recordings at points indicated on the drawings for the duration of the time period and record the temperature at space thermostats or space sensors, the humidity at space humidistats or space sensors and the ambient temperature and humidity in a shaded and weather protected area. Submit test reports for the ductwork leak test, and performance tests in booklet form, upon completion of testing. Document phases of tests performed including initial test summary, repairs/adjustments made, and final test results in the reports.

3.12 CLEANING AND ADJUSTING: Provide a temporary bypass for water coils to prevent flushing water from passing through coils. Inside of room fan-coil units, coil-induction units, air terminal units, and unit ventilators, thoroughly clean ducts, plenums, and casing of debris and blow free of small particles of rubbish and dust and then vacuum clean before installing outlet faces. Wipe equipment clean, with no traces of oil, dust, dirt, or paint spots. Provide temporary filters prior to startup of all fans that are operated during

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construction, and provide new filters after all construction dirt has been removed from the building, and the ducts, plenums, casings, and other items specified have been vacuum cleaned. Perform and document that proper "Indoor Air Quality During Construction" procedures have been followed; provide documentation showing that after construction ends, and prior to occupancy, new filters were provided and installed. Maintain system in this clean condition until final acceptance. Properly lubricate bearings with oil or grease as recommended by the manufacturer. Tighten belts to proper tension. Adjust control valves and other miscellaneous equipment requiring adjustment to setting indicated or directed. Adjust fans to the speed indicated by the manufacturer to meet specified conditions. Maintain all equipment installed under the contract until close out documentation is received, the project is completed and the building has been documented as beneficially occupied.

3.13 OPERATION AND MAINTENANCE

a. Operation and Maintenance Manuals: Submit six manuals at least 2 weeks prior to field training.

b. Operation and Maintenance Training: Conduct a training course for the members of the operating staff as designated by the Contracting Officer. Make the training period consist of a total of 16 hours of normal working time and start it after all work specified herein is functionally completed and the Performance Tests have been approved. Conduct field instruction that covers all of the items contained in the Operation and Maintenance Manuals as well as demonstrations of routine maintenance operations. Submit the proposed On-site Training schedule concurrently with the Operation and Maintenance Manuals and at least 14 days prior to conducting the training.