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AIR & WATER SYSTEM BALANCING <br />AND ACCOUSTICAL TESTING <br />Section 15990 <br />15-1207 <br />(6) Approximate suction static pressure in w.g. <br />(7) Approximate discharge static pressure in w.g. <br />(8) Fan rpm <br />2. Rated and Actual Motor Data: <br />a. Horsepower / Break -horsepower <br />b. Phase <br />C. Voltage. <br />d. Amperage. <br />3. Duct Velocity Traverse Data: <br />a. Fan or unit number <br />b. Design and actual CFM <br />C. Duct division signs and area. <br />d. Design and actual average velocity <br />e. Duct static pressure average velocity <br />f. Traverse location <br />g. Traverse measurements in fpm (show grid pattern) <br />4. Individual Outlet and Inlet Data: <br />a. Identify each outlet for location, area, and fan or unit system <br />b. Outlet or inlet manufacturer and type <br />C. Outlet or inlet size, effective area or Ak factor <br />d. Design and actual velocity in feet per minute (FPM) <br />e. Design and actual CFM <br />5. Other information required to establish completely balanced systems. <br />3.02 BALANCE REQUIREMENTS: <br />A. Make allowance for air filter resistance at time of tests. Balance main air supplies at design <br />air quantities and at an air resistance across filter bank midway between design <br />specifications for clean and dirty filters. <br />B. Balance work within the following tolerances: <br />1. Supply, Return, Exhaust inlets/outlets: balance within -5% / +10% of design CFM. <br />2. Outside Air Inlets: balance within -0% / +10% of design CFM. <br />C. Rooms with positive or negative pressure requirements to maintain a minimum of 15% <br />differential pressure regardless of the above tolerances. <br />D. Provide a room or building pressure test for each system. Maximum building pressure shall <br />not exceed 0.03" inches of pressure. <br />E. HVAC systems shall be balanced at normal "minimum outside air" condition. Where such <br />systems are required to deliver 100 -percent return air or a variable amount of outside air, as <br />indicated in specifications for automatic temperature control sequences, total CFM test shall <br />be repeated for 100 -percent return air and maximum outside air shall agree with conditions <br />found under maximum outside air operation before system is considered to be in balance. <br />Adjustments of proper dampers shall be made to achieve balance and marked so that <br />4 <br />