23 30 00_Air Distribution.pdf

SECTION 23 30 00

AIR DISTRIBUTION

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PART 1 - GENERAL

1.01 DESCRIPTION

A. Provide Air Distribution Materials as specified herein and as shown on the Drawings.

B. Material characteristics and size shall be as indicated on the Drawings.

C. Related Work: The requirements of Section 23 05 00, Common HVAC Materials and

Methods, also apply to this section.

1.02 QUALITY ASSURANCE

A. Air Distribution Equipment Rating: In accordance with AMCA certified rating procedures and bearing the AMCA label.

B. See Commissioning specification for additional requirements.

1.03 SUBMITTALS

A. Submit catalog data, construction details and performance characteristics for all manufactured materials.

B. Submit operating and maintenance data.

C. For adhesives and sealants used on the interior of the building (inside the waterproofing system), include printed statement of volatile organic compound (VOC) content.

PART 2 - PRODUCTS

2.01 SHEET METAL

A. Quality Assurance: Galvanized steel sheet metal except where otherwise indicated.

Metal gauges, joints and reinforcement in accordance with Mechanical Code, ASHRAE and SMACNA standards. Ductwork shall be fabricated to the following pressure classifications:

1. Exhaust ducts: See section E below.

2. Supply ducts from abort gate discharge to diffuser: 2" positive. Otherwise construct per exhaust ducts.

B. Duct Sealing Tapes: Provide one of the following UL listed ductwork sealing tape systems.

1. Two-part sealing system with woven fiber, mineral gypsum impregnated tape and non-flammable adhesive. Hardcast “DT” tape and “FTA-20” adhesive, United “Uni-Cast” system, or accepted substitute.

2. For joints and seams exposed to the weather in lieu of soldering, United “Uni- Cast” system or approved.

3. Sealing systems with VOC content are not allowed.

4. Sealants and Primers – General: Provide only products having lower volatile organic compound (VOC) content than required by South Coast Air Quality Management District Rule No. 1168.

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C. Optional Duct Joints for Sheet Metal Ducts: “Ductmate System” by Ductmate Industries, Inc., Ward Duct Connectors, Inc., Mez Industries, or acceptable substitute. Spiramir self-sealing round duct connector system meeting Class 3 leakage standards with EPDM o-ring seal.

D. Exposed to View Spiral Seam Duct and Fittings: Round and flat oval spiral seam duct shall be manufactured of galvanized steel sheet metal with spiral lock seam. Matching fittings shall be manufactured of galvanized steel with continuous welded seams. Gauge shall be per SMACNA Duct Construction Standard third addition table for appropriate pressure, and reinforcement or at least 26 gauge.

E. Wood Dust Collection and Welding Ducts Option 1:

1. All duct-work shall be of a clamp together design using a die-formed, rolled edge which is then joined together by an all welded single lever clamp of 304SS material construction. The clamp shall be fitted with a heavy duty, continuously re-usable O-ring sealing gasket. There shall be no punched or perforated parts to the clamp and the clamp shall be backed by a factory life-time guarantee. All clamp together ducting shall be of continuous welded or lock form construction along the longitudinal seam of the rolled form duct. All connections shall have a Black Buna N seal in clamp for standard installs and a Gortex seal for oil mist and food grade applications. A Red Silicone seal is available for high temp applications.

2. An 11" adjustable sleeve section shall be used where pipe lengths shorter than 5’ are required. To use an adjustable sleeve section, measure the overall span and cut a 5’ piece of pipe 4" shorter than the desired span. Slip the raw end of pipe inside the 11" long adjustable sleeve section (which has a slightly larger ID) and use the supplied rubber O-ring in place of the missing rolled edge for clamping and securing the joint. Put the cut piece in the direction of airflow.

3. Duct Material sheet blanks are five feet long, which is then rolled and fused together with a plasma weld or lock-form process along the longitudinal seam.

4. The ends of the duct are then pressed in a die to form a rolled bead on each end of the duct. This rolled-end is used for clamping components together as well as reinforcement every 5 feet.

5. Straight duct and other connecting components to be constructed of galvanized sheets produced by the continuous galvanizing process in which conforms to ASTM-A-527, and commercial quality ASTM A-527. Galvanized sheeting is produced with a minimum spangle with coating weight of G-90.

6. Gauge: To Follow are standard material gauges as used for most industrial woodworking and Exhaust applications. Heavier gauges are available. The pipe is incredibly strong as the pipe clamp every 5' reinforces the duct. Ducting shall be able to withstand pressures up to -40" W.C.

a. 3" diameter 26

b. 4" to 6" diameter 24

c. 7" to 12" diameter 22

d. 13" up to 24" 20

7. Fittings and elbows shall be of the same material and construction as stated above, however one gauge heavier construction. Branch legs shall take off at 30 degrees or 45 degrees where shown on drawings.

a. All fittings and elbows shall have adjustability in the collar so that each collar may act as an adjustable sleeve. This is useful in situations where and adjustable sleeve would be too long.

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8. Ells:

a. up to 7" diameter no less than 1.5 center line radius

b. 8" up to 24" no less than 1.5 center line radius

9. Support, anchors, etc., per SMACNA “Industrial Duct Construction” manual.

10. Approved manufacturer K&B Duct by Kirk and Blum MFG or U.S. duct “clamp together” system.

F. Wood Dust Collection Ducts Option 2: Construction, support, anchors, etc., per

SMACNA “Industrial Duct Construction” manual.

1. Round, except where shown otherwise. All joints lapped, riveted and soldered or welded. No spot welding or pop-riveting permitted. Transverse joints formed with lap in direction of air flow. Elbows of seven piece construction with minimum inside radius of four diameters. Cleanouts every 25' in horizontal sections and at each machine. Branches to enter main duct at an angle not exceeding 30 degrees, with a slide gate damper immediately preceding connection to main, with locking means after adjustment. Ductwork constructed of 20 gauge galvanized steel with elbows and fittings of 18 gauge.

2. Floor Sweep: 18 gauge galvanized steel. As detailed with blast gate in duct adjacent to floor sweep.

G. High Pressure Flex Duct: For connection of tools to dust collection/exhaust systems.

0.060" extruded thermo plastic rubber with temperature rating of 225º F. Novaflex AP60 or equal.

2.02 GRILLES, REGISTERS AND DIFFUSERS

A. Description: Provide grilles, registers and diffusers as shown on the Drawings.

B. Finishes: Flat white enamel prime coat, factory applied.

C. Manufacturers: Carnes, Krueger, Titus, Price, and Tuttle & Bailey are accepted substitutes where only Titus model numbers are listed. Where other manufacturer's products are listed and/or "accepted substitute" is indicated, only the products or an accepted substitute for that item shall be provided.

D. Sidewall Supply Grille or Register: Double deflection grille with face bars parallel to long dimension on ceiling type and horizontal on wall type; bars to be individually adjustable, spaced on 0.66" to 0.75" centers; key operated opposed blade volume damper. Titus

300RL.

PART 3 - EXECUTION

3.01 EQUIPMENT INSTALLATION

A. Air Handling Equipment Installation and Arrangement: Install and arrange as shown on Drawings. Comply with the manufacturer's recommendations for installation, connection, and start-up.

B. Equipment Access Panels: Locate free of all obstructions such as ceiling bars, electrical conduit, lights, ductwork, etc.

C. Filters: Install specified filters or accepted substitute temporary construction filters in supply units and systems prior to start-up or use for drying and/or temporary heat.

Replace prior to acceptance of project.

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3.02 INSTALLATION OF GRILLES, REGISTERS AND DIFFUSERS

A. Size and air handling characteristics shall be as shown on the Drawings.

B. Locate, arrange, and install grilles, registers and diffusers as shown on the Drawings.

Locate registers in tee-bar ceilings with diffusers centered on the tile unless indicated otherwise.

3.03 DUCTWORK INSTALLATION

A. Duct systems shall be assembled, transported, stored and installed in accordance with current SMACNA Duct Cleanliness for New Construction Guidelines. Duct Cleanliness Level is Intermediate.

B. Support: Install ductwork with 1" wide strap cradle hangers not more than 8' on centers or as required by code. Support terminal units independent of adjacent ductwork. Attach to available building construction according to good practices for materials involved.

Manufactured hanger system acceptable in lieu of fabricated hangers at Contractors option. Ductmate “Clutcher” system or approved. Support flexduct where shown to be used for lengths beyond 4' per above requirements. Comply with SMACNA Duct Construction Standard Figure 3-9 and 3-10.

C. Elbows and Fittings: Construct elbows with throat radius equal to duct width in plane of turn or make them square and provide double wall, air foil turning vanes.

D. Fittings: Make transitions and take-offs as shown on Drawings. Provide volume dampers and splitter dampers as indicated on Drawings and as specified. Saddle tees are not allowed.

E. Duct Insulation: Specified in Section 23 07 00.

F. Sleeves: Provide galvanized sheet metal plaster ring around ductwork penetrating exposed finished walls. Sleeve and flash all duct penetrations through exterior walls in an air tight and weatherproof manner.

G. Plenums: Construct sheet metal plenums and partitions of not lighter than 18 gauge galvanized steel and reinforce with 1-1/2" by 1/2" by 1/8" angles as required to prevent drumming or breathing.

H. Sealing: Caulk, seal, grout and/or tape ductwork and plenums to make airtight at seams, joints, edges, corners and at penetrations. Solder all seams, joints, etc., on all ductwork exposed to the weather. Install specified tape in accordance with manufacturer's requirements using degreaser on surfaces to be taped and wiped to eliminate moisture.

3.04 NEW DUCTWORK CLEANING

A. Store all ductwork materials on pallets or above grade, protected from weather, dirt/mud and other construction dust.

B. Remove all accumulated dust, dirt, etc. from each duct section as it is being installed.

END OF SECTION