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c. Units with more than one coil shall have intermediate drain pans and individual coil racking to <br /> permit removal of a single coil out the side of the unit through an access panel. Removal of coils <br /> through an access door is not allowed. <br /> C. Fan Section: <br /> 1. Testing Requirements: The following factory tests are required: <br /> a. General: Sound power level ratings shall comply with AMCA Standard 301 "Method for <br /> Calculating Sound Ratings from Laboratory Test Data" and shall be the result of tests made in <br /> accordance with AMCA Standard 300 "Test Code for Sound Ratings". Fans shall be licensed to <br /> bear the AMCA Certified Sound Rating Seal. <br /> b. Unit's fan performance rating for flow rate, pressure, power, air density, speed of rotation, and <br /> efficiency shall be factory tested and rating established in accordance with AMCA Standard <br /> 210/ASHRAE Standard 51-Laboratory Methods of Testing Fans for Rating. <br /> 2. Fan Section Construction: Fan section shall be equipped with a steel channel base for integral mounting <br /> of fan, and motor, and shall be mounted on seismically rated 2" isolators to reduce vibration to the <br /> structure. <br /> 3. Fans and Shafts: Statically and dynamically balanced and designed for continuous operation at the <br /> maximum rated fan speed and motor horsepower. Fans shall be exact type with adjustable pitch blades. <br /> Provide with backdraft dampers when more than one fan is installed in the fan housing. Fan wheels shall <br /> be steel painted with zinc chromate primer and an enamel finish coat. Fan shaft shall be solid steel <br /> turned,ground,and polished. Fan wheels shall be keyed to the shaft. <br /> 4. Shaft Bearings: Grease-lubricated ball bearings selected for 200,000 hours average life,with extended <br /> grease fittings. <br /> 5. Fan Drivers: Designed for a 1.4 service factor and factory mounted with final alignment and belt <br /> adjustment made for installation. <br /> a. Belt Drive: Motors and fan wheel pulleys shall be adjustable pitch for use with motors up to 10 <br /> HP,and fixed pitch for motors above 10 HP. <br /> b. Motors mounted on the inside of the fan cabinet shall have OSHA approved wire mesh steel belt <br /> guards with holes for tachometer reading. <br /> D. Motors: <br /> 1. Torque Characteristics: Sufficient to accelerate the driven loads satisfactorily. <br /> 2. Motor Sizes: Minimum 'size <br /> �s Indicated. If not indicated, large enough so that the drive load will not <br /> require the motor to operate in the service factor range. <br /> 3. Temperature Rating: 50 deg C maximum temperature rise at 40 deg C ambient for continuous duty at <br /> full load(Class A Insulation). <br /> 4. Service Factor: 1.15 for plyphase motors and 1.35 for single-phase motors. <br /> 5. Motor Construction: NEMA Standard MG 1,general purpose,continuous duty,Design B. <br /> a. Bases: Adjustable. <br /> 15854-4 No.99132-CP2 <br />