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NEUDORFER N I �� <br /> ENGINEERS <br /> W W W.NEUDORFERENGINEERS.COM <br /> AN Integra COMPANY <br /> Terms and Abbreviations <br /> Project: Boeing Bldg 40-26 <br /> 737 North Line Tower Relocations <br /> Everett, WA 98204 <br /> HVAC Heating Ventilation and Air Conditioning SAT Supply Air Temperature <br /> HWS Heating Water Supply S.F. Service Factor <br /> HWR Heating Water Return Schedule Design data obtained from the <br /> HX Heat Exchanger (sched) mechanical prints' schedule of <br /> HZ Hertz, cycle per second equipment. <br /> I.D. Inside Diameter SCR Silcon Controlled Rectifier <br /> in. inches Speed Controller <br /> in.w.g. inches of water gauge SF Supply Fan <br /> Kfactor Correction factor to the free area need to SFD Smoke/Fire Damper <br /> calculate CFM. SP Static Pressure <br /> KW Kilowatts Spec(s) Specifications <br /> LAT Leaving Air Temperature sq.ft. square feet <br /> LWG Low Wall Grille Submittals Submitted data on equipment <br /> LWR Low Wall Register (subs) capabilities. <br /> LWT Leaving Water Temperature Suct. Suction <br /> MAU Make-up Air Hangling Unit SWG Sidewall Grille <br /> MAX Maximum Flow Requirements for DDC SWR Sidewall Register <br /> MBH Mega BTUs per hour(1MBH=1,000BTUH) TAB Test; Adjust; and Balance <br /> MIN Minimum Flow Requirements for DDC Tach Tachometer <br /> N/A Not Available Tech Technician <br /> N/S Not Shown or Specified TSP Total Static Pressure: Difference <br /> OA Outside Air between the entering and leaving <br /> OBD Opposed Blade Damper static pressure of a fan. <br /> O.D. Outside Diameter TP Traverse or Test Point <br /> PD Pressure Drop. TU Terminal Unit <br /> PH Phase UH Unit Heater <br /> PHC Preheat Coil VAV Variable Air Volume; box that <br /> Prim. Primary contains a motorized damper that <br /> PSI Pounds per Square Inch modulates airflow. <br /> RA Return Air VD Volume Damper <br /> RAT Return Air Temperature VFD Variable Frequency Drive <br /> RF Return Fan Velgrid Instrument that reads used to read <br /> RH Relative Humidity velocity in feet per minute. <br /> RHC Reheat Coil VP Velocity Pressure <br /> RPM Revolutions per Minute VVT Variable Volume Terminal <br /> RTU Roof Top Unit W.C. Water Column <br /> RVA Rotating Vane Anemometer-reads W.G. Water Gauge <br /> air velocity in feet per minute WB Wet Bulb <br /> SA Supply Air <br />