STANDARD	9 Nov 1998	15820

UPDATES -

SECTION 15820

DUCT ACCESSORIES

PART 1 GENERAL

Edit Article '1.1' as necessary to give an accurate, but brief description of the work of this Section and accurate listing of related work, especially if the scope of the work is not shown graphically on the Drawings.

1.1	SUMMARY

A.	Includes But Not Limited To

1.	Furnish and install duct accessories in specified ductwork as described in Contract Documents.

B.	Related Sections

1.	Section 15051 - General Mechanical Requirements	15051

2.	Section 15915 - Electric and Electronic Control

15915 15915opt

1.2	REFERENCES

Delete or add references based on editing of other parts of this Section.

A.	American Society for Testing and Materials	ASTM

1.	ASTM A 653-96, 'Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process'

2.	ASTM C 665-96, 'Standard Specification for Mineral-Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing'

3.	ASTM C 1071-91, 'Standard Specification for Thermal and Acoustical Insulation (Glass Fiber, Duct Lining Material)'

PART 2 PRODUCTS

2.1	COMPONENTS

A.	Acoustical Duct Liner

1.	One inch thick density fiberglass conforming to requirements of ASTM C 1071. Liner will not support microbial growth when tested in accordance with ASTM C 665.

2.	Approved Manufacturers -	Approved Products

a.	Certainteed - Ultralite or ToughGard

b.	Knauf - Duct Liner E-M

c.	Manson - Akousti-Liner

d.	Owens Corning Fiberglas - Aeroflex Plus

e.	Johns-Manville- Linacoustic

Edit the list of approved manufacturers to include only those with whom you are familiar and whose products are available in the Project area. Do not add or approve any other manufacturers or systems without written approval of the Mechanical Group of A & E Services.

2.	Adhesive -

a.	Approved Water Base Manufacturers And Types -	Approved Products

1)	Cain - Hydrotak

2)	Design Polymerics - DP2501 or DP2502 (CMCL-2501)

3)	Duro Dyne - WSA

3)	Hardcast - IA-901

4)	Kingco - 10-568

5)	Miracle - PF-101

6)	Mon-Eco - 22-67

7)	Polymer Adhesive - Glasstack #35

8)	Techno Adhesive - 133

9)	United McGill - Uni-tack

b.	Approved Solvent Base (non-flammable) Manufacturers And Types -

Approved Products

1)	Cain - Safetak

2)	Duro Dyne - FPG

3)	Hardcast - Glas-Grip 648-NFSE

4)	Kingco - 15-137

5)	Miracle - PF-91

6)	Mon-Eco - 22-24

7)	Polymer Adhesive - Q-Tack

8)	Techno Adhesive - 'Non-Flam' 106

c.	Approved Solvent Base (flammable) Manufacturers And Types -

Approved Products

1)	Cain - HV200

2)	Duro Dyne - MPG

3)	Hardcast - Glas-Grip 636-SE

4)	Kingco - 15-146

5)	Miracle - PF-96

6)	Mon-Eco - 22-22

7)	Polymer Adhesive - R-Tack

8)	Techno Adhesive - 'Flammable' 106

3.	Fasteners -

a.	Adhesively secured fasteners not allowed.

b.	Approved Manufacturers -	Approved Products

1)	AGM Industries Inc - 'DynaPoint' Series RP-9 pin

2)	Cain

3)	Duro Dyne

4)	Omark dished head 'Insul-Pins'

5)	Grip nails may be used if each nail is installed by 'Grip Nail Air Hammer' or by 'Automatic Fastener Equipment' in accordance with Manufacturer's recommendations.

B.	Flexible Equipment Connections

1.	30 oz closely woven UL approved glass fabric, double coated with neoprene.

2.	Fire retardant, waterproof, air-tight, resistant to acids and grease, and withstand constant temperatures of 250 deg F.

3.	Approved Manufacturers And Models -	Approved Products

a.	Cain - N-100

b.	Duro Dyne - MFN

c.	Elgen - ZLN

d.	Ventfabrics - Ventglas

e.	Ductmate - ProFlex

C.	Duct Access Doors

1.	Factory built insulated access door with hinges and sash locks. Construction shall be galvanized sheet metal, 24 ga minimum.

2.	Approved Manufacturers And Models -	Approved Products

a.	AirBalance - Fire/Seal FSA 100

b.	Cesco-Advanced Air - HAD-10

c.	Elgen - Model 85 A

d.	Flexmaster - Spin Door

e.	Kees Inc - ADH-D

f.	Pottorff - 60-HAD

g.	Ruskin - ADH-24

D.	Dampers And Damper Accessories

1.	Concealed Ceiling Damper Regulators -

a.	Approved Manufacturers -	Approved Products

1)	Cain

2)	Duro Dyne

3)	Metco Inc

4)	Vent-Lock - 666

5)	Young - 301

2.	Volume Dampers -

a.	Factory-manufactured 16 gauge galvanized steel, single blade and opposed blade type with 3/8 inch axles and end bearings. Blade width 8 inches maximum. Blades shall have 1/8 inch clearance all around.

1)	Damper shall operate within acoustical duct liner.

2)	Provide channel spacer equal to thickness of duct liner.

b.	Dampers above removable ceiling and in Mechanical Rooms shall have locking quadrant on bottom or side of duct. Otherwise, furnish with concealed ceiling damper regulator and cover plate.

Edit the list of approved manufacturers to include only those with whom you are familiar and whose products are available in the Project area. Do not add or approve any other manufacturers or systems without written approval of the Mechanical Group of Architectural & Engineering Services.

c.	Approved Manufacturers And Models -	Approved Products

1)	American Warming - VC-2-AA

2)	Arrow - OBDAF-207

3)	C & S - AC40

4)	Cesco - CDS

5)	Daniel - CD-OB

6)	Greenheck - VCD-20

7)	Pottorff - CD-42

8)	Ruskin - MD-35

9)	UTEMP - CD-OB

3.	Backdraft Dampers -

a.	Backdraft blades shall be nonmetallic neoprene coated fiberglass type.

b.	Stop shall be galvanized steel screen or expanded metal, ½ inch mesh.

c.	Frame shall be galvanized steel or extruded aluminum alloy.

Edit the list of approved manufacturers to include only those with whom you are familiar and whose products are available in the Project area. Do not add or approve any other manufacturers or systems without written approval of the Mechanical Group of A & E Services.

d.	Approved Manufacturers And Models -	Approved Products

1)	American Warming - BD-15

2)	C & S - BD30

3)	Cesco - FBD 101

4)	Daniel - FBD-H/V

5)	Pottorff - 50FBD

6)	Ruskin - NMS2

7)	UTEMP - BFEA

Paragraph 'E' is usually only required in systems with air handlers.

E.	Magnehelic Gauge

1.	Approved Manufacturer And Model -	Approved Products

a.	Dwyer - Series 2001-AF complete with standard accessories and vent valves.

F.	Air Turns

1.	Single thickness vanes. Double thickness vanes not acceptable.

2.	4-1/2 inch wide vane rail. Junior vane rail not acceptable.

Delete Paragraph 'H' if flexible ductwork not used.

G.	Branch Tap for Flexible Ductwork

1.	Factory-manufactured rectangular-to-round 45 degree leading tap fabricated of 24 ga zinc-coated lockforming quality steel sheets meeting requirements of ASTM A 653, with G-90 coating.

2.	One inch wide mounting flange with die formed corner clips, pre-punched mounting holes, and adhesive coated gasket.

3.	Manual Volume Damper -

a.	Single blade, 22 ga minimum

b.	3/8 inch minimum square rod with brass damper bearings at each end.

c.	Heavy duty locking quadrant on 1-1/2 inch high stand-off mounting bracket attached to side of round duct.

4.	Approved Models And Manufacturers -

a.	HETD-L by Daniel Manufacturing, Ogden, UT (801) 622-5924

b.	STO by Flexmaster USA Inc, Houston, TX (713) 462-7694

c.	HET by Sheet Metal Connectors Inc, Minneapolis, MN (612) 572-1100

2.2	FABRICATION

A.	Duct Liner

1.	Install mat finish surface on air stream side. Secure insulation to cleaned sheet metal duct with continuous 100 percent coat of adhesive and with 3/4 inch long mechanical fasteners 12 inches on center maximum unless detailed otherwise on Drawings. Pin all duct liner.

2.	Accurately cut liner and thoroughly coat ends with adhesive. Butt joints tightly. Top and bottom sections of insulation shall overlap sides. If liner is all one piece, folded corners shall be tight against metal. Ends shall butt tightly together.

3.	Coat longitudinal and transverse edges of liner with adhesive.

B.	Air Turns

1.	Permanently install vanes arranged to permit air to make abrupt turn without appreciable turbulence, in 90 degree elbows of above ground supply and return ductwork.

2.	Quiet and free from vibration when system is in operation.

PART 3 EXECUTION

3.1	INSTALLATION	Installation

A.	Duct Liner

1.	Furnish and install acoustic lining in following types of ducts -

a.	Supply air and return air ducts associated with units RTU-3, RTU-4, RTU-5, RTU-6, and RTU-7.

b.	Transfer air

c.	Elbows, fittings, and diffuser drops greater than 12 inches in length.

Edit Paragraph 'B' to conform to equipment installed in Project.

B.	Install flexible inlet and outlet duct connections to each roof top unit.

C.	Access Doors In Ducts

1.	Install at each manual outside air damper and at each motorized damper. Locate doors within 6 inches of installed dampers.

2.	Install within 6 inches of fire dampers and in Mechanical Room if possible.

D.	Dampers And Damper Accessories

1.	Install concealed ceiling damper regulators.

a.	Paint cover plates to match ceiling tile.

b.	Do not install damper regulators for dampers located directly above removable ceilings or in Mechanical Rooms.

2.	Provide each take-off with an adjustable volume damper to balance that branch.

a.	Anchor dampers securely to duct.

b.	Install dampers in main ducts within insulation.

c.	Dampers in branch ducts shall fit against sheet metal walls, bottom and top of duct, and be securely fastened. Cut duct liner to allow damper to fit against sheet metal.

d.	Where concealed ceiling damper regulators are installed, provide cover plate.

Paragraph 'E' is usually only required in systems with air handlers.

E.	Magnehelic Gauge

1.	Install on each air-handling unit housing adjacent to filters.

2.	Provide pressure sensing tips with connecting tubing on each side of filter.

END OF SECTION