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4Aq <br /> AABC <br /> SI 11VICI S <br /> PF POWER FACTOR <br /> PHC PREHEAT COIL <br /> PHC PHASE(S) <br /> PMP CIRCULATING PUMP <br /> P.P PERFORATED PLATE <br /> PSI POUNDS PER SQUARE INCH <br /> P.T. PITOT TRAVERSE <br /> RA RETURN AIR <br /> RF RETURN AIR FAN <br /> R.G. RETURN GRILLE <br /> RHC REHEAT COIL <br /> RPM REVOLUTIONS PER MINUTE <br /> SA SUPPLY AIR <br /> SAT SUPPLY AIR TEMPERATURE <br /> S.D. SUPPLY DIFFUSER <br /> SEF SMOKE EXHAUST FAN <br /> SF(AIR) SUPPLY FAN <br /> S.F.(ELECT) SERVICE FACTORS <br /> SHC STEAM HEATING COIL <br /> S.P."W.C." STATIC PRESSURE RESISTANCE, MEASURED IN <br /> INCHES OF WATER COLUMN <br /> S.W.E. SIDEWALL EXHAUST <br /> S.W.R. SIDEWALL RETURN <br /> S.W.S. SIDEWALL SUPPLY <br /> TAB TESTING,ADJUSTING,AND BALANCING <br /> TSP TOTAL STATIC PRESSURE <br /> UH UNIT HEATER <br /> V VOLTS <br /> VAV VARIABLE AIR VOLUME <br /> VD VOLUME DAMPER <br /> VFD VARIABLE FREQUENCY DRIVE <br /> VP VELOCITY PRESSURE <br /> W WATTS <br /> WB WET BULB <br /> W.G. WATER GAUGE <br /> OF DEGREES FAHRENHEIT <br /> DP DIFFERENTIAL(DELTA)PRESSURE OR PRESSURE <br /> DROP <br /> DT DIFFERENTIAL(DELTA)TEMPERATURE, NET <br /> TEMPERATURE DECREASE OR INCREASE <br /> PSI POUNDS PER SQUARE INCH <br /> 02/07/2024 <br /> Page 8 of 14 <br />