Vol 2 - Garney Construction

C. Unit Base:b. Sized and located to provide easy access to unit internalcomponents.c. Non-Hinged, latched, and gasketed to provide a weatherproof seal.d. Provide doors on both side(s) of each unit.e. Latches:1) “Ventlok” style noncorrosive alloy latches operable frominside and outside of unit.2) For access doors configured to open against unit operatingpressure, provide safety latches that allow access doors topartially open after first handle movement and fully openafter second handle movement.1. Full perimeter base frame.2. Minimum10-gauge (0.135 in.) structural steel construction, withC channel cross support members, on close centers.3. All joints fully welded.4. Fitted with lifting lugs at corner of unit.5. Attached to unit at factory, unless noted otherwise for field assembly.D. Supply Fan Section:1. General:a. Supply air section with fan assembly, consisting of housing(where applicable), wheel, fan shaft, bearings, motor, disconnectswitch, drive assembly, support structure, and accessories.b. Casing constructed in accordance with Article Unit Casing.c. Suitable to convey air at temperatures up to 250 degrees F.d. Fan Performance: AMCA 99-2408 class rating corresponding tothe static pressure at which the fan is designed to operate.e. Fan Assemblies: Statically and dynamically balanced, designed forcontinuous operation at maximum rated fan speed and motorhorsepower.2. Centrifugal Fan Housing:a. Material: G-90 galvanized steel.b. Construction:1) Formed and reinforced sheet metal panels, curved scrollconfiguration with shaped cutoff, continuous seam weldingand side angle reinforcement.2) Flanged and drilled outlet to permit duct connection.3) Spun-formed aerodynamic bell mouth inlet.4) Access doors or panels to allow entry to internal parts andcomponents.PW/WBG/382059AIR HANDLING UNITSAUGUST 15, 2012 23 77 00 - 9©COPYRIGHT 2012 CH2M HILL