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DocuSign Envelope ID: 9826C043- 4C32- 49CD- A4CC- DC28ABAB7CE7 <br />SECTION 238000 — TEST AND BALANCE <br />8. For coils with 3 -way control valves, adjust bypass ball valve so that flow in bypass mode is the <br />same as flow through the coil. <br />B. Electric- Heating Coils: Measure the following data for each coil: <br />1. Nameplate data. <br />2. Airflow. <br />3. Entering- and leaving -air temperature at full load. <br />4. Voltage and amperage input of each phase at full load and at each incremental stage. <br />5. Calculated kilowatt at full load. <br />6. Fuse or circuit - breaker rating for overload protection. <br />C. Refrigerant Coils: Measure the following data for each coil: <br />1. Dry -bulb temperature of entering and leaving air. <br />2. Wet -bulb temperature of entering and leaving air. <br />3. Airflow. <br />4. Air pressure drop. <br />5. Refrigerant suction pressure and temperature. <br />3.15 PROCEDURES FOR TEMPERATURE MEASUREMENTS <br />A. During TAB, report the need for adjustment in temperature regulation within the automatic <br />temperature - control system. <br />B. Measure indoor wet- and dry -bulb temperatures every other hour for a period of two successive <br />eight -hour days, in each separately controlled zone, to prove correctness of final temperature <br />settings. Measure when the building or zone is occupied. <br />C. Measure outside -air, wet- and dry-bulb temperatures. <br />3.16 PROCEDURES FOR SOUND LEVEL TESTING <br />A. Conduct AABC standard sound tests for all air handlers and fans, and include test results in the Test - <br />and- Balance report. If sound levels are above these listed, adjustments shall be made to bring the <br />sound level within the range set forth. <br />B. If this cannot be done with the equipment as installed, recommendation shall be made by the <br />Engineer to correct the sound level to within specified range. Additions of sound traps, insulation, <br />isolation mounts, or dampers shall be made by the Mechanical Contractor under the direction of the <br />Engineer at no extra cost. <br />C. Acceptable maximum sound levels are as follows: <br />1. Halls and corridor areas: NC30 (40 dba on Scale A) <br />2. Auditoriums, classrooms and offices NC -25, (35 dba on Scale A) <br />3. Shop, gymnasium, and multipurpose areas NC40 (50 dba on Scale A). <br />3.17 PROCEDURES FOR COMMERCIAL KITCHEN HOODS <br />A. Measure, adjust, and record the airflow of each kitchen hood. For kitchen hoods designed with <br />integral makeup air, measure and adjust the exhaust and makeup airflow. Measure airflow by duct <br />Pitot -tube traverse. If a duct Pitot -tube traverse is not possible, provide an explanation in the report <br />of the reason(s) why and also the reason why the method used was chosen. <br />1. Install welded test ports in the sides of the exhaust duct for the duct Pitot -tube traverse. <br />Install each test port with a threaded cap that is liquid tight. <br />B. After balancing is complete, do the following: <br />1. Measure and record the static pressure at the hood exhaust -duct connection. <br />2. Measure and record the hood face velocity. Make measurements at multiple points across <br />the face of the hood. Perform measurements at a maximum of 12 inches between points and <br />between any point and the perimeter. Calculate the average of the measurements recorded. <br />Verify that the hood average face velocity complies with the Contract Documents and <br />governing codes. <br />3. Check the hood for capture and containment of smoke using a smoke emitting device. <br />Observe the smoke pattern. Make adjustments to room airflow patterns to achieve optimum <br />results. <br />C. Visually inspect the hood exhaust duct throughout its entire length in compliance with authorities <br />having jurisdiction. Begin at the hood connection and end at the point it discharges outdoors. Report <br />findings. <br />1. Check duct slopes as required. <br />2. Verify that duct access is installed as required. <br />3. Verify that point of termination is as required. <br />4. Verify that duct air velocity is within the range required. <br />5. Verify that duct is within a fire -rated enclosure. <br />D. Report deficiencies. <br />3.18 TEMPERATURE - CONTROL VERIFICATION <br />A. Verify that controllers are calibrated and commissioned. <br />B. Check transmitter and controller locations and note conditions that would adversely affect control <br />functions. <br />C. Record controller settings and note variances between set points and actual measurements. <br />D. Check the operation of limiting controllers (i.e., high- and low- temperature controllers). <br />Reece, Noland & McElrath, Inc. 238000-7 Orange County Board of Elections <br />Orange Co., NC 05/04/18 <br />