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2.03 MODULAR AIR HANDLING UNITS <br /> A. General: <br /> 1. General Description: Factory assembled, consisting of fans, motor and drive assembly, coils, damper, <br /> plenums,filters,drip pans,and mixing dampers. <br /> 2. Types:Central-station 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 double wall galvanized steel panels(the inner wall shall be perforated at the <br /> fan section and solid at all other sections), fabricated to allow removal for access to internal parts and <br /> components,with joints between sections sealed. <br /> a. Medium and high-pressure units shall be constructed with additional bracing and supports. Units rated <br /> at 5.5 inches w.g. and higher shall connected to accessories sections with double-thickness neoprene- <br /> coated flexible connection. <br /> 2. Insulation. Comply with NFPA Standard 90A "Standard for the Installation of A# Conditioning and <br /> Ventilating Systems,"for insulation. <br /> a. Type: Coated,glass-fiber insulation, 1 inch thick and having a minimum density of 1-1/2 pcf. <br /> b. Location and Application: Factory applied with adhesive and mechanical fasteners to the internal surface <br /> of section panels downstream from and including the cooling coil section. <br /> 3. Access Panels and Doors: Same materials and finishes as cabinet and complete with hinges,latches,handles, <br /> and gaskets. <br /> a. Fan section shall have inspection and access panels and doors sized and located to allow periodic <br /> maintenance and inspections. <br /> 4. Single-Wall Drain Pans: IAQ type double sloped drain pan formed of galvanized sheet steel. Fabricate pans <br /> in sizes and shapes to collect condensate from cooling coils (including coil piping connections and return <br /> bends) and humidifiers when units are operating at the maximum cataloged face velocity across the cooling <br /> coil. F <br /> a. Drain connections: The pan shall drain to the side of the unit nearest to the floor drain. Verify the <br /> location on the plans. Construct and install pan to provide adequate pitch to drain. <br /> b. Pan top surface coating: Elastomeric compound. <br /> c. Units with stacked coils shall have an intermediate drain pan or a drain trough to collect condensate from <br /> top coil. <br /> C. Fans Section: <br /> 1. Testing Requirements: The following factory tests are required: <br /> 158547 No.99132-CP2 <br />