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CO2 CO2 SENSOR ❑ (WITH SET POINT ADJUSTMENT) *** REQUIRED FOR EACH ZONE DX VARIABLE AIR VOLUME UNIT DDC POINT SCHEDULE All AO DI DO RETURN AIR TEMPERATURE OA DAMPER SA SMOKE DETECTOR FAN ON -AUTO SUPPLY AIR TEMPERATURE RA DAMPER RA SMOKE DETECTOR DX CLG ON -OFF** SUPPLY DUCT STATIC PRESSURE VFD FAN RUN OUTSIDE AIRFLOW SENSOR DIRTY FILTER ZONE CO2 SENSOR **REQUIRED FOR EACH STAGE NOTE: SMOKE DETECTORS SHOWN FOR CLARITY / INTERFACE. SMOKE DETECTORS SUPPLIED BY ELECTRICAL CONTRACTOR AND INSTALLED BY MECHANICAL CONTRACTOR. DDC-1 R-1 R-2 DDC-1 RTU-1 D -1 RTU-3 RTU-2 DDC-1 DEDICATED CIRCUIT COMM RTU-4 120V AC MDSC CHANNELS SURGE KEYPAD A PROTECTOR B CPU WITH MONITOR & PORT 1 C VAV BOXES --------------------------------------------------------- KEYBOARD (l D PORT 2 MIC/EAR FIELD PTS. PHONE LINE MODEM FIELD PTS., EXH FANS PRINTER 000000aoo SURGE _ e........ PROTECTOR EARTH GROUND LOCATE IN SYSTEMS ROOM WHICH CONTAINS MAIN TELEPHONE EQUIPMENT THE PACKAGED DX VAV UNIT CONSISTS OF PACKAGED DX COOLING SYSTEM, VARIABLE SPEED FAN, MODULATING OA DAMPER, AND MODULATING RA DAMPER. SYSTEM CONTROL MODES, OCCUPIED AND UNOCCUPIED, HEATING AND COOLING SHALL BE THROUGH THE MDSC. THE DIGITAL SYSTEM CONTROLLER SHALL START THE SUPPLY FAN ALLOWING THE FAN TO RUN WHEN THE H-O-A SWITCH IS IN THE AUTO POSITION. IN THE COOLING MODE, WITH THE AHU FAN OPERATING, THE DIRECT DIGITAL CONTROLLER SHALL CYCLE ON THE DX SYSTEM COMPRESSORS TO MAINTAIN A SUPPLY AIR DISCHARGE TEMPERATURE OF 55' F (ADJUSTABLE). IF RETURN AIR TEMPERATURE DROPS BELOW 65' F (ADJUSTABLE) THE DX COOLING SHALL NOT BE ALLOWED TO OPERATE UNTIL THE RETURN AIR TEMPERATURE RISES ABOVE 72' F (ADJUSTABLE). IN THE HEATING MODE THE DX COOLING SHALL NOT BE ALLOWED TO OPERATE. THE DIRECT DIGITAL CONTROLLER SHALL MAINTAIN SYSTEM DUCT STATIC PRESSURE BY MODULATING THE VARIABLE FREQUENCY DRIVE ON THE FAN MOTOR TO MAINTAIN THE DPT-1 SUPPLY DUCT STATIC PRESSURE AS SENSED BY A DUCT STATIC PRESSURE SENSOR LOCATED APPROXIMATELY TWO-THIRDS THE LENGTH OF THE MAXIMUM LENGTH DUCT. PROVIDE A HIGH LIMIT STATIC PRESSURE SWITCH, SET AT 2.5" W.C. (ADJUSTABLE), HARD WIRED TO FAN TO SHUT DOWN FAN UPON ACTIVATION. THE VARIABLE FREQUENCY \ DRIVE SHALL BE SET TO MAINTAIN DX UNIT MINIMUM REQUIRED AIRFLOW AT ALL TIMES. I THE DIGITAL CONTROLLER SHALL MAINTAIN THE OUTSIDE AIR FLOW BY MODULATING THE OUTSIDE AIR DAMPER TO MEET SET POINT AS SENSED BY THE AIRFLOW MEASURING STATION. AT NO TIME SHALL THE OUTSIDE AIR FLOW DROP BELOW THE MINIMUM LEVEL AS SENSED BY THE AIRFLOW MEASURING STATION. IF THE OUTSIDE AIR DAMPER IS FULL OPEN, AND THE OUTDOOR AIR FLOW DROPS BELOW ITS SET POINT THEN THE DIRECT DIGITAL CONTROLLER SHALL MODULATE CLOSED THE RETURN AIR DAMPER SO AS TO MAINTAIN OUTSIDE AIR FLOW AT SETPOINT. IN THE OCCUPIED MODE THE OUTSIDE AIR DAMPER SHALL OPEN. WHEN UNOCCUPIED THE OUTDOOR AIR DAMPER SHALL CLOSE. PROVIDE OPTIMAL START/STOP MODES FOR WARM-UP AND COOL DOWN AT THE BEGINNING OF THE OCCUPIED CYCLE. THIS CYCLE TIME SHALL BE 1 HOUR (ADJ) AND DURING THIS CYCLE THE OUTDOOR AIR DAMPER SHALL BE CLOSED. THE DIGITAL SYSTEM CONTROLLER SHALL MONITOR CARBON DIOXIDE (CO2) LEVELS IN EACH SPACE VIA SPACE CO2 SENSORS. IF CO2 LEVELS VARY BY 10% OR MORE FROM SETPOINT (600 PPM ADJUSTABLE). THE DDC SHALL GENERATE AN ALARM TO THE BUILDING OPERATOR VIA THE THE BUILDING AUTOMATION SYSTEM. ALL POINTS ON THE FLOW DIAGRAM SHALL BE GRAPHICALLY MONITORED. THE SUPPLY AND RETURN DUCT SMOKE DETECTOR SHALL BE INTERLOCKED TO TO THE FIRE ALARM SYSTEM, WHICH SHALL, WHEN IN ALARM STOP THE AHU THRU HARDWIRE CONNECTION FROM THE FIRE ALARM SYSTEM SHUT -DOWN RELAY(S) AND THE AHU FAN STARTER CIRCUIT AND INDICATE SMOKE DETECTOR SHUTDOWN TO THE DDC PANEL VIA AUXILIARY CONTACTS. BILL OF MATERIAL ID DESCRIPTION CT-1 CURRENT TRANSDUCER SWITCH TE-1,TE-2 AIR TEMPERATURE SENSOR DDC-1 DIRECT DIGITAL CONTROLLER R-1-1,R-2-1 DIGITAL RELAY DPT-1 DIFFERENTIAL STATIC PRESSURE SENSOR DA-1, DA-2 MODULATING DAMPER ACTUATOR SD-1 SMOKE DETECTOR RRS REMOTE RESET SWITCH VFD VARIABLE FREQUENCY DRIVE AF AIRFLOW MONITORING SENSOR CO2 CO2 SENSOR DP DIFFERENTIAL PRESSURE SWITCH DDC ONE LINE DIAGRAM VELOCITY FLOW ! pa POWER SUPPLY (24 V.) DDC-2 MODULATING DAMPER & OPERATOR DA-1 CABLE TO DDC-1/MDSC. 8 R-1-1 R-2-1 TE-2 DDC DEFAULTS SHALL BE FIELD RESETTABLE AT ZONE SENSOR THRU HAND HELD DEVICE =-1 -1 ROOM SENSOR ❑ (NO SET POINT ADJUSTMENT) VAV COOLING WITH ELECTRIC HEATING FLOW DIAGRAM WITH DAMPER ACTUATOR FOR EACH VAV BOX PROVIDE ROOM THERMOSTAT & HUMIDISTAT MOUNTED ON INTERIOR WALL NEAR RETURN OUT OF DIRECT SUNLIGHT AT ADA HEIGHT. DDC POINT SCHEDULE AI AO DO SPACE TEMPERATURE DAMPER OPERATOR ELEC HEAT INTERLOCK RELAY VELOCITY FLOW ELEC HEAT STAGE #1 AUTO -OFF DUCT TEMPERATURE I ELEC HEAT STAGE #2 AUTO -OFF SPACE HUMIDITY BILL OF MATERIAL ID DESCRIPTION DDC-2 DIGITAL CONTROLLER DA-1 MOTOR ACTUATOR V-1 VELOCITY TRANSMITTER TE-1 SPACE SENSOR R-1-1 ELECTRIC HEAT INTERLOCK DIGITAL RELAY R-2-1, R-2-2 ELECTRIC HEAT DIGITAL RELAYS (EA. STAGE) TE-2 AIR TEMPERATURE SENSOR H-1 HUMIDITY SENSOR EMERGENCY SYSTEMS SHUTDOWN THE MDSC SHALL SHUT DOWN AIR HANDLING UNIT, EXHAUST FANS, AND ASSOCAITED EQUIPMENT UPON EMERGENCY SHUTDOWN COMMAND FROM THE BUILDING OPERATOR. EMERGENCY AIR HANDLING UNIT SHUTDOWN SHALL CLOSE OA AND RA DAMPERS. DIRECT DIGITAL CONTROL SYSTEM LEGEND MDSC MASTER DIGITAL SYSTEM CONTROLLER DDC UNITARY CONTROLLER - APPLICATION SPECIFIC 0-- DEDICATED 120V CONTROL CIRCUIT ONE PER ROOM 120V OR GROUP OF DDC, MDSC, ETC. ROOM TEMPERATURE SENSOR (WITH THERMOMETER AND a SETPOINT ADJUSTMENT INSIDE COVER IN PUBLIC AREAS & OUTSIDE COVER IN PRIVATE OFFICES). SENSORS SHALL BE TAMPER PROOF IN ALL UNSUPERVISED AREAS TE TEMPERATURE ELEMENT(SENSOR); �LJ,1 DUCT MOUNTED. PROVIDE TEMPERATURE INDICATOR (THERMOMETER) NEXT TO EACH SENSOR. AIR DIFFERENTIAL STATIC PRESSURE ELEMENT(SENSOR) SD vSMOKE DETECTOR Dom_ DAMPER ACTUATOR WITH CONTROL DAMPER (MODULATING OR TWO POSITION AS INDICATED) CURRENT COIL TO INDICATE OFF/RUN CONDITION OF MOTOR, COMPRESSOR OR ELECTRIC HEAT/HUMIDIFIER RELAY OR RELAY PACK; EACH OUTPUT OR RP- CONTACT TO BE SEPARATELY OPERABLE FROM DDC AND/OR MDSC VAV COOLING TERMINAL UNIT WITH ELECTRIC HEAT/REHEAT: THE VAV TERMINAL UNIT WILL CONSIST OF A VAV BOX WITH MODULATING DAMPER AND DAMPER OPERATOR, ELECTRIC HEAT COIL WITH ONE OR TWO STAGES, ZONE TEMPERATURE SENSOR, VELOCITY SENSOR, HUMIDSTAT, AND APPLICATION SPECIFIC DIRECT DIGITAL CONTROLLER (DDC). WHEN THE ZONE TEMPERATURE IS WITHIN THE COOLING PROPORTIONAL BAND, THE DIRECT DIGITAL CONTROLLER DDC) WILL MODULATE AIR FLOW (CFM) BY POSITIONING THE VAV BOX DAMPER VIA THEMODULATING DAMPER ACTUATOR TO PROVIDE THE CFM WITHIN THE MINIMUM AND MAXIMUM VELOCITY CFM AS SCHEDULED SO AS TO MAINTAIN THE DESIRED TEMPERATURE SET POINT. THE DIRECT DIGITAL CONTROLLER WILL NOT MOVE THE DAMPER TO A POSITION THAT EXCEEDS THE MAXIMUM OR MINIMUM VELOCITY (CFM) FOR THE VAV TERMINAL UNIT. IF THE ZONE TEMPERATURE DROPS BELOW THE HEATING SET POINT THE ZONE TEMPERATURE SENSOR WILL, THROUGH THE DIRECT DIGITAL CONTROLLER OPERATE THE ELECTRIC HEAT COIL IN STAGES TO MAINTAIN THE HEATING TEMPEkkTURE SETPOINT. UPON A FURTHER REQUIREMENT FOR HEATING TO MAINTAIN HEATING TEMPERATURE SETPOINT, THE DIRECT DIGITAL CONTROLLER WILL MODULATE THE VAV TERMINAL UNIT OPERATOR TO THE FULL FLOW VELOCITY POSITION. THE REVERSE OF THE ABOVE WILL TAKE PLACE UPON A TEMPERATURE RISE. THE ELECTRIC HEAT COIL SHALL NOT BE ALLOWED TO OPERATE UNLESS THE MAIN AHU FAN IS OPERATING. DURING AIR HANDLING SYSTEM SHUT DOWN, THE DIGITAL CONTROLLER WILL COMMAND THE VAV TERMINAL UNIT DAMPER MOTOR ACTUATOR TO FULLY CLOSE THE DAMPER. THE ELECTRIC HEAT COIL WILL BE OFF. HEATING SHALL NOT BE ALLOWED TO OPERATE WITH THE OUTDOOR AIR TEMPERATURE ABOVE 45 F (ADJUSTABLE) FROM THE MDSC. THE DIGITAL SYSTEM CONTROLLER SHALL MONITOR ALL POINTS SHOWN ON IN THE COOLING MODE, IF TEMPERATURE IS SATISFIED BUT HUMIDITY IS ABOVE SETPOINT FOR MORE THAN A 10 MINUTE PERIOD (ADJUSTABLE), THE BOX SHALL GO TO FULL (COOLING) AIRFLOW AND ELECTRIC HEAT SHALL BE ALLOWED TO "REHEAT" AIR BACK TO TEMPERATURE SETPOINT. WHEN HUMIDITY IS SATISFIED, THE VAV BOX SHALL RETURN TO NORMAL OPERATION. EACH VAV BOX IN THIS TENANT SPACE SHALL BE AN EXTENSION OF THE BUILDING'S ENERGY MANAGEMENT CONTROL SYSTEM. 0 ,g 0 0 00 = N — N --Lw L w J ww ----- MAXIMUM VELOCITY AIRFLOWL U z M 0 U - - - - - -------- ---- MINIMUM VELOCITY (AIRFLOW) HEATING D SET PROPORTIONAL SETBACK K D FORWARD PROPORTIONAL V BAND SUMMER BAND PROPORTIONAL SET POINT TEMP. CONTROL PROFILE {;ryyl'rD1 t1'ft'}k?. PVoF,i'FA�2R.taceTn:x, usic. SfQt!! s:srth; r�i3neo c+n strc..:t '±;ttl^.5 3. 03 .5 i57 These plan e" a pynol d and re eubpot to mpyripht probcbm "an-amlliteotural work' under eanon 102 of M copyright act. 12 u e o. es mended Decwn80r 19W end knewT w aftibictural woha copyright protection act d 1990. The proftim molud" but m not kmiled to the morel lam ore well a "'genwnt and c.v-bon d epic" and.1—te of the designunder inch pnftdm, uneuthonnd nee of these plane. work a horn nepr"onled, can Ispey result In the caeeabon Of aonebuc"n a baso ldeip being mod da _.bey caryeneation to URBANoRDERylempa in, Flcnda mptretim AA2M490. ISSUE DATE 09/21 /2020 REVISIONS 0 m > -0 U) m 0 -L -0 LL CL W W -F N r. >, \� 0 Q / r` MN THE MDSC SHALL SHUT ISOLATION DAMPERS FOR THE LOBBY, ENTRY, AND MAIL ROOM HVAC DUCTS UPON EMERGENCY SHUTDOWN COMMAND FROM THE BUILDING OPERATOR. DATE: 11/13/2020 DRWN: S.J.M. CHKD: S.J.M. SCALE: N.T.S. SHEET NUMBER