Laserfiche WebLink
2.02 CUSTOM AIR HANDLING UNITS <br /> A. General: <br /> 1. General Description: Factory assembled, consisting of fans, motor and drive assembly, coils, dampers, <br /> plenums,filters,drip pans,and mixing dampers. <br /> 2. Types: Custom air-handling units included in this project are of the following types: <br /> a. Draw through. <br /> 3. Motor and Electrical Components: Refer to Division 15 Section 15030, Electrical Requirements for <br /> Mechanical Equipment. <br /> B. Cabinet: <br /> 1. Materials: Formed and reinforced galvanized 16 gauge steel panels,with a* ininmiim number of shipping <br /> splits as required by the jobsite conditions. Joints between sections installed and sealed by the <br /> Contractor. Indoor units shall be provided with standard factory finish Units shall be rated 12 inches <br /> w.g. with double wall perforated panels at the fan section and double wall solid panels at all other <br /> sections, and high pressure flex connections to unit chasing. Floor shall be constructed of 14 gauge <br /> checkerplate epoxy coated steel,and shall have a minimum deflection of 1/16"when subjected to a 200# <br /> load. Casing shall be factory certified in writing by an Officer of the Company to withstand 12" of <br /> pressure with a 1%leakage rate. Tests may be conducted on random on one or two units at the expense <br /> of the Manufacturer to verify the stated leakage rate. Heavy duty structural c-channels(4 to 6 inch)shall <br /> be provided for structural integrity during shipping and rigging,as well as to provide a means to elevator <br /> the unit for proper removal of condensate. Tubular heavy gauge formed sheet metal is not acceptable. <br /> Factory mounted lifting lugs,spreader bars and cables shall be provided to avoid damage to units during <br /> rigging- <br /> 2. Insulation: Comply with NFPA Standard 90A "Standard for the Installation of Air Conditioning and <br /> Ventilating Systems" <br /> a. Type: Doublewall glass-fiber insulation,2 inch thick and having a minimum density of 3#. <br /> b. Location and Application: Factory applied with no mechanical fasteners to the internal surface of <br /> panels. <br /> 3. Access Doors: Same materials, thickness (2 or 4 inch), and finishes as cabinet and complete with <br /> stainless steel hinges, 10" diameter double pane viewing ports, Ventlok 310 handles, and bulb type <br /> gasketing. Door must be the same thickness as the unit casing. <br /> a. Fans shall have full-size (24"x 72"access doors sized and located to allow periodic maintenance <br /> and inspections. All other doors shall be the size as shown on the Plans. <br /> 4. Double Wall,Insulated Bi-Sloped Drain Pans: Formed sections of stainless steel. Fabricate individual <br /> drain pans for each coil in sizes and shapes to collect condensate from cooling coils (including coil <br /> piping connections and return bends)and humidifiers when units are operating at the maximum cataloged <br /> face velocity across the cooling coil. <br /> a. Drain Connections: One side of the pan. Construct and install pan to provide adequate pitch to <br /> drain. <br /> b. Pan Top Surface Coating: Stainless Steel. <br /> 15854-3 No.99132-CP2 <br />