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• � Boeing 40-31 Phase 1 July 12,2012 <br /> Drain Pan <br /> t All cooling coil sections shall be provided with an insulated, double-wall, galvanized or stainless steel drain pan. To <br /> address indoor air quality(IAQ), the drain pan shall be designed in accordance with ASHRAE 62.1 being of sufficient <br /> size to collect all condensation produced from the coil and sloped in two planes promoting positive drainage to�eliminate <br /> stagnant water conditions. The outlet shall be located at the lowest point of the pan and shall be sufficient diameter to <br /> preclude drain pan overflow under any normally expected operating condition. All drain pan threaded connections shall <br /> be visible external to the unit. Drain connections shall be of the same material as the primary drain pan and shall extend <br /> a minimum of 2-1/2"beyond the base to ensure adequate room for field piping of condensate drain traps. Coil support <br /> members inside the drain pan shall be of the same material as the drain pan and coil casing. <br /> Refer fo Product Data for specific information on which sections are supplied with a drain pan, the drain pan material <br /> and connection location. <br /> Access Door Construction <br /> Access doors shall be 2"double-wall construction. Interior and exterior door panels shall be of the same construction as <br /> the interior and exterior wall panels, respectively. All doors shall be provided with a thermal break construction of door <br /> panel and door frame. Gasketing shall be provided around the full perimeter of the doors to prevent air leakage. <br /> Surface-mounted handles shall be provided to allow quick access to the interior of the functional section and to prevent <br /> through-cabinet penetrations that could likely weaken the casing leakage and thermal perFormance. Handle hardware <br /> shall be designed to prevent unintended closure. Access doors shall be hinged and removable for quick,easy access. <br /> Hinges shall be interchangeable with the door handle hardware to allow for alternating door swing in the field to <br /> minimize access interference due to unforeseen job site obstructions. Door handle hardware shall be adjustable and <br /> visually indicate locking position of door latch external to the section. <br /> All doors shall be a minimum of 60" high when su�cient height is available, or the maximum height allowed by the unit <br /> height. <br /> Door handles shall be provided for each latching point of the door necessary to maintain the specified air leakage <br /> integrity of the unit. Optionally for indoor AHUs and as standard on outdoor AHUs,outward swing doors are provided <br /> with a single handle linked to multiple latching points. Unit doors may also be provided with an optional shatterproof <br /> window for viewing, capable of withstanding unit operating pressures. <br /> Refer to Product Data for specific information on which sections are supplied with an access door, the door location, a <br /> single handle, and a window. <br /> MIXING SECTION <br /> A mixing section shall be provided to support the damper assembly for outdoor, return, and/or exhaust air. <br /> Dampers <br /> Dampers shall modulate the volume of outdoor,return,or exhaust air.The dampers shall be of double-skin airfoil design <br /> with metal, compressible jamb seals and extruded-vinyl blade-edge seals on all blades.The blades shall rotate on <br /> stainless-steel sleeve bearings.The dampers shall be rated for a maximum leakage rate of 4 cfm/ft2 at 1 in.w.g. <br /> complying with ASHRAE 90.1 maximum damper leakage. All leakage testing and pressure ratings shall be based on <br /> AMCA Standard 500-D. Dampers may be arranged in a parallel or opposed-blade configuration. <br /> Dampers <br /> Dampers shall modulate the volume of outdoor, return,or exhaust air.The dampers shall be of double-skin airFoil design <br /> with metal, compressible jamb seals and extruded-vinyl blade-edge seals on all blades.The blades shall rotate on <br /> stainless-steel sleeve bearings. The dampers shall be rated for a maximum leakage rate of 4 cfm/ft2 at 1 in.w.g. <br /> complying with ASHRAE 90.1 maximum damper leakage. All leakage testing and pressure ratings shall be based on <br /> AMCA Standard 500-D. Dampers may be arranged in a parallel or opposed-blade configuration. <br /> Filters <br /> Mixing sections shall be provided with a filter rack as indicated in the Product Data and As-Built sections of the submittal. <br /> COIL SECTION <br /> The coil section shall be provided complete with coil and coil holding frame. Coil section side panels shall be easily <br /> removable to allow for removal and replacement of coils without impacting the structural integrity of the unit. The coils <br /> shall be installed such that headers and return bends are enclosed by unit casings. If two or more cooling coils are <br /> stacked in the unit, an intermediate drain pan shall be installed between each coil and be of the same material as the <br /> primary drain pan. Like the primary drain pan,the intermediate drain pan shall be designed being of sufficient size to <br /> collect all condensation produced from the coil and sloped to promote positive drainage to eliminate stagnant water <br /> conditions. The intermediate pan shall begin at the leading face of the water-producing device and be of sufficient <br /> length extending downstream to prevent condensate from passing through the air stream of the lower coil. Intermediate <br /> FLD=Fumrshed by Trane U.S.Inc.dba Trane/ Equipment Submittal Page 7 of 26 <br /> Installed by Others <br />