220 OLYMPIC BLVD 2021 VA OUTPATIENT CLINIC Plans 2022-12-15

THE RTU UNITS ARE AVAILABLE TO RUN 247. OPERATION SHALL BE SCHEDULED USING AN ELECTRONIC SCHEDULER. THIS SCHEDULER SHALL HAVE AN OVER RIDE FEATURE SUCH THAT THE FACILITY CAN BE USED DURING OFF HOURS. THE RTU SHALL START AT LEAST ONE HOUR PRIOR TO SCHEDULED OCCUPANCY FOR MORNING WARM UP SEQUENCE. THE PURPOSE OF THIS IS TO PURGE THE BUILDING AND TEMPER THE OCCUPIED BUSINESS.ADDITIONALLY, A I FOR A PERIOD OF LEAST Pr - BUSINESS CONCLUSION OF THE EACH RTU HAS OUTSIDE AIR AND RELIEF AIR PATHS THAT PROVIDE FOR VENTILATION. MINIMUM VENTILATION AT THE RTU UNITS SHALL BE SET FOR THE SUM OF THE IMC VENTILATION CALCULATIONS (PUBLISHED IN THIS DRAWING SET) FOR EACH RTU. BEYOND VENTILATION, OUTSIDE AIR WILL ALWAYS BE USED IN AN ECONOMIZER FUNCTION TO PROVIDE FREE COOLING ON DAYS WHERE OUTSIDE AIR TEMPERATURE SUPPORTS SUCH AN APPROACH. IF THE UNIT IS IN COOLING AND THE OUTSIDE AIR TEMPERATURE IS LESS THAN 55®F, MECHANICAL COOLING SHALL BE LOCKED OUT. AS THE INDOOR AIR TEMPERATURE AND OUTDOOR AIR TEMPERATURE BOTH RISE, THE CONTROLS WILL EXECUTE AN ALGORITHM USING A PID LOOP TO SET UNIT DISCHARGE AIR TEMPERATURE. THE PREFERENCE IS FOR THE CALCULATED DISCHARGE AIR TEMPERATURE TO BE MAINTAINED WITHOUT USING MECHANICAL COOLING, HOWEVER, IN THE COOLING SEASON THERE WILL BE TIMES WHEN THE OUTDOOR AIR TEMPERATURE DOES NOT SUPPORT THIS, EITHER FULLY OR IN PART. IN THIS CONDITION, OUTSIDE IS USED FOR VENTILATION ONLY AS DESCRIBED ABOVE TO MEET THE PUBLISHED VENTILATION RATE AND MECHANICAL COOLING WILL BE USED TO SET THE DISCHARGE AIR TEMPERATURE. DURING THE EXTREMES OF HEATING AND COOLING SEASON, THERE MAY BE INFREQUENT OCCURRENCE WHERE THE iOTEMPERATURE THAN * O GREATERTHAN 88*F DURING TIMES WHEN THE BUILDING IS NOT OCCUPIED. IN SUCH AN EVENT,THEHVAC SHALLD — INDOOR AIR TEMPERATURE TO A MINIMUM OF 60*F OR COOLING TO BRING THE INDOOR AIR TEMPERATURE DOWN TO 85'F. THE UNOCCUPIED DEAD BAND IS BETWEEN 60-F AND 85-F, AND WHEN THE INDOOR TEMPERATURES ARE IN THIS RANGE, THE HVAC SYSTEM SHALL NOT RUN. THE ONLY EXCEPTION IS THE SPLIT SYSTEM EQUIPMENT THAT SUPPORTS PROCESS LOADS, HEATING AND COOLING SET POINTS ARE ADJUSTABLE BUT SHALL BE INITIALLY SET AT 707 FOR HEATING AND 777 FOR COOLING. THE WIDTH OF THE DEAD BAND SHALL ALWAYS REMAIN A MINIMUM OF 5®F AS REQUIRED BY THE WSEC. GREATEST.EXTERIOR ZONES HAVE THE ADVANTAGE OF FAN POWERED TERMINAL UNITS WITH AUXILIARY HEAT. THIS PROVIDES AN ADDITIONAL HEATING MECHANISM TO THE AREAS WHERE HEAT LOSS IS EXPECTED TO BE THE POWERED TERMINALO VENTILATION FUNCTION R THE SPACES THEY THE CONTROLS SHALL POLE THE SENSORS IN THE SPACES TO DETERMINE THE SPACE CONDITIONS THAT EXIST. THE DEFAULT OF THE SYSTEM SHALL BE HEATING. HOWEVER, IF TWO OR MOVE FPTU ZONES ON ANY RTU CALLS FOR COOLING, THE RTU SHALL GO INTO COOLING USING A CALCULATED PID ALGORITHM TO COOL THESE TWO ZONES WITHOUT DRASTICALLY OVERCOOLING THE REMAINDER OF THE SPACES. RELATED TO PROCESS COOLING LOADS, EACH SPLIT SYSTEM HAS A PROGRAMMABLE ROOM SENSOR LOCATED IN THE SPACE IT SERVES, THESE UNITS SHALL RUN 240 SINCE THEY SUPPORT PROCESS LOADS. � •� i � - i r *ii r,�: ALLOWIHE CONTROLS CONTRACTOR SHALL PROVIDE A USER INTERFACE. THIS USER INTERFACE SHALL O-. ENVIRONMENTALSYSTEM CHECKS TO CONFIRM i i AND THE STATE OF D iN _ THE USER INTERFACE SHALL PROVIDE AN ALARM FUNCTION RELATED TO MAJOR EQUIPMENT FAILURES (RTU, FPTU AND PROCESS :...- D SPLIT A._ WELL r _IGH AND/OR LOW TEMPERATURE fir -RE ALARMS. 38898 � � o��S joNaL SIGNED: 12/11 /2020 REVISIONS 1. PERMIT SET 2. 3. 4. e 5. m- JOB NUMBER 120010 12-11-2020 SHEET SIZE ARCH D: 24" x 36" SHEET TITLE SHEET 21 OF 22