7/28/2019 301_pdfsam_2.3- Mechanical, HVAC & Plumbing Specification Novotel

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Gulf House EngineeringJanuary 2010

07-C106 NOVOTEL AL DANA RESORT TOWERS PAGE 299 SECTION 15890 SHEET METALS

Provide neoprene gaskets securely formed into door frames around the peripheryof all duct access doors.

Equip door frames for plenums and casings with hollow tubular gaskets. Provideall doors complete with 300 mm x 300 mm viewing ports.Provide access doors at all fire dampers. Gasket used shall be of high

temperature rating. Servicing volume dampers and servicing of motors on fansand air handling units. Access doors shall be provided with sponge rubbergaskets around the entire perimeter.

Hang access doors in ductwork in separate frames and attached to duct withaircraft type cable. Provide "Ventlok No. 100" cast zinc latches one (1) per side.Install hinged walk-in type casing access doors where required and indicated onthe Drawings. Construct casing access doors 1450mm x 600mm wide wherepossible and be complete with heavy duty hinges, hardware, and Ventlok #260latch handles. See figures 61 1 and 6-12, and Table 6-2 of the 1985 SMACNAManual.

2.4 Acoustic Duct Lining

A. Rectangular Duct Liner: Permacote Linacoustic meeting ASTM C 1071with air surface coated with acrylic coating treated with EPA registeredanti-microbial agent proven to resist microbial growth as determined byASTM G 21 and G 22.

1. Noise Reduction Coefficient: 0.70 or higher based on Type Amounting and tested in accordance to ASTM C 423.

2. Adhesive: Meeting ASTM C 916.

3. Fasteners: Duct liner galvanized steel pins, welded or mechanicallyfastened.

B. Round Duct Liner: Permacote Spiracoustic, rigid performed round liner, orSpiracoustic Plus with air surface coated with acrylic coating treated withEPA register anti-microbial agent proven to resist microbial growth asdetermined by ASTM G 21 and G 22.

1. Noise Reduction Coefficient of 0.70 as per ASTM C 423. (Type Amounting)

2.5 Field Assembled Plenum and Casing Construction

A. Provide metal partitions, plenums and casings of not less than 1.61 mmgalvanized sheet metal suitably reinforced with rolled angle sections.

B. Provide metal partitions, plenums and casings with adequate strength forall operating conditions. Fabricate each sheet of material as a panel. J oinpanels by 40 mm standing seams on outside of casings and secure withbolts at 300 mm centres.

C. Provide closure baffles around banks of coils, filters and other inlinecomponents.

D. Provide 25 mm minimum size rolled structural steel angles where casingmeets floor. Caulk joints to prevent air and water leakage.