8030_mi5.pdf

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SCALE

DATE

PROJECT NO:

DRAWING NO:

AS SHOWN

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SHEET MI5 OF 5

SF-SS

ENABLE

RTU

SAFETY

EMR-BUTFAP

RTU REMOTE

CIRCUIT

CIRCUIT

RTU-SMK

(SYS-ENA) AND COMMANDED TO RUN (SF-SS),AND ALL CONTROL LOOPS SHALL BE ENABLED.

ZONE OCCUPANCY INPUT(s) INDICATE A SPACE IS OCCUPIED THE SUPPLY FAN SHALL BE ENABLED

TEMPERATURE UNOCCUPIED SETPOINT(s) (BLDG-T-SP) (WITH A 5 DEGREESF DEADBAND) OR THE

THE SUPPLY FAN SHALL NOT RUN. WHEN BLDG-T DROPS BELOW OR RISES ABOVE THE BUILDING

INPUT(s) INDICATE THE SPACE IS UNOCCUPIED ALL CONTROL LOOPS SHALL BE DISABLED AND

THE BUILDING TEMPERATURE UNOCCUPIED SETPOINT(s) (BLDG-T-SP) AND THE ZONE OCCUPANCY

(2) UNOCCUPIED MODE: WHILE THE BUILDING TEMPERATURE (BLDG-T) IS ABOVE OR BELOW

LOOPS SHALL ALSO BE ENABLED.

RUN (SF-SS). ALL CONTROL LOOPS SHALL BE ENABLED. THE ZONE TEMPERATURE CONTROL

(1) OCCUPIED MODE: THE SUPPLY FAN SHALL BE ENABLED (SYS-ENA) AND COMMANDED TO

D. SYSTEM ENABLE AND LOOP ENABLE

DRAWING.

PUSH-BUTTON WITH INPUT TO THE DDC HARDWARE, AS SHOWN ON THE POINTS SCHEDULE

(4) DDC HARDWARE RESET OF ALL PROOFS AND SAFETIES SHALL BE VIA A LOCAL BINARY

(D) EMERGENCY VENTILATION STOP (EMR-BUT)

(C) DUCT SMOKE DETECTOR (RTU-SMK)

(B) SUPPLY AIR DUCT PRESSURE HIGH LIMIT (SA-P-HL)

(FREEZESTAT) (DA-T-LL)

(A) DISCHARGE AIR TEMPERATURE LOW LIMIT

(3) SAFETIES:

(A) SUPPLY FAN STATUS (SF-S)

(2) PROOFS:

DISABLED AND THE AHU FAN BEING COMMANDED OFF UNTIL RESET.

PROOF OR ACTIVATION OF ANY SAFETY SHALL RESULT IN ALL CONTROL LOOPS BEING

AS SHOWN. DDC HARDWARE SHALL MONITOR ALL PROOFS AND SAFETIES AND FAILURE OF ANY

PROOFS AND SAFETIES. SAFETIES SHALL BE DIRECT-HARDWIRE INTERLOCKED TO THE RTU

(1) THE SUPPLY FAN,AND ALL DDC HARDWARE CONTROL LOOPS SHALL BE SUBJECT TO

C. PROOFS AND SAFETIES:

(3)THE SYSTEM SHALL OPERATE IN ONE OF THE FOLLOWING MODES: OCCUPIED, UNOCCUPIED

FROM THE SYSTEM SCHEDULER(SYS-OCC) IS UNOCCUPIED.

SPACE OCCUPANCY INPUT(s)ZN-OCC) INDICATE THE SPACE IS UNOCCUPIED AND THE INPUT

(2)UNOCCUPIED MODE:THE SYSTEM SHAL BE IN THE UNOCCUPIED MODE WHEN THE LOCAL

FROM THE SYSTEM SCHEDULER(SYS-OCC) IS OCCUPIED.

SPACE OCCUPANCY INPUT(s)ZN-OCC) INDICATE THE SPACE IS OCCUPIED OR THE INPUT

(1)OCCUPIED MODE:THE SYSTEM SHAL BE IN THE OCCUPIED MODE WHEN THE LOCAL

B. OCCUPANCY MODES:

BE UNDER CONTROL OF THE RTU HARDWARE.

(2)THE RELIEF FAN SHALL RUN SUBJECT TO THE SUPPLY FAN RUNNING. FAN SPEED SHALL

SHUTOFF SWITCH AS SHOWN FAN SPEED SHALL BE UNDER CONTROL OF THE RTU HARDWARE

FAN TO STOP. THE SUPPLY FAN SHALL ACCEPT AN OCCUPANT ACCESSIBLE EMERGENCY

PRECEDENCE OVER ALL OTHER VFD INPUTS AND SWITCHES AND SHALL CAUSE THE SUPPLY

(1)SUPPLY FAN SHALL ACCEPT A FIRE ALARM PANEL (FAP) SIGNAL THAT TAKES

A. SUPPLY AND RELIEF FANS::

SHALL BE PROPORTIONAL-INTEGRAL (PI) CONTROL.

THE POINTS SCHEDULE. UNLESS OTHERWISE SPECIFIED, ALL MODULATING CONTROL

AND TO PROVIDE SNVT INPUTS, OUTPUTS AND ALARMS AS SPECIFIED AND SHOWN ON

CONTRACTOR SHALL INSTALL DDC HARDWARE TO PERFORM THIS SEQUENCE OF OPERATION

VARIABLE AIR VOLUME SYSTEM WITH EXHAUST FAN

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22 OCT 15

DPW 02643-5J

C8030.22

C.0004125

MODULATE BETWEEN AN ADJUSTABLE MINIMUM AND MAXIMUM THE DAMPER OPENS TO PROVIDE RELIEF.

OUTDOOR AIR DAMPER TRACKING: THE EXHAUST FAN WILL ACTIVATE BASED ON THE OUTSIDE AIR DAMPER POSITION AND WILL III.

SPEED CONTROL: THE EXHAUST FAN CAN BE SET TO PROVIDE A FIXED CAPACITY. THIS SET POINT CAN BE WRITTEN THROUGH A NETWORK.II.

ATMOSPHERIC PRESSURE. THE EXHAUST FAN SHALL MODULATE TO MAINTAIN THE BUILDING PRESSURE SET POINT.

BUILDING PRESSURE CONTROL: A DIFFERENTIAL PRESSURE TRANSDUCER SHALL COMPARE THE INDOOR BUILDING PRESSURE TO AMBIENT I.

EXHAUST FAN CONTROL: THE EXHAUST FAN WILL BE PROVIDED WITH A DIRECT DRIVE ELECTRICALLY COMMUTATED MOTOR (ECM)I.

AIR TEMPERATURE SET POINT.

RETURN AIR ENTHALPY TO UTILIZE OUTSIDE AIR FOR COOLING. OUTSIDE AIR AND RETURN AIR DAMPERS SHALL MODULATE TO MAINTAIN SUPPLY

ECONOMIZER: A COMPARATIVE DRY BULB ECONOMIZER SHALL BE ENGAGED WHENEVER THE OUTDOOR ENTHALPY OR DRY BULB IS LESS THAT THE H.

ALL ADJUSTABLE AT THE UNIT CONTROLLER.

AIR TEMPERATURE SET POINT. THE MINIMUM LEAVING COIL TEMPERATURE, REHEAT DAT SET POINT, AND HUMIDITY ACTIVATION SET POINT ARE

MAINTAIN A LEAVING COIL TEMPERATURE WHILE MODULATING THE CAPACITY OF THE HOT GAS REHEAT COIL TO MAINTAIN THE REHEAT DISCHARGE

OUTDOOR AIR HOOD RISES ABOVE THE DEHUMIDIFICATION SET POINT. UPON ACTIVATION, THE COMPRESSOR WILL ENERGIZE TO A CAPACITY TO

DEHUMIDIFICATION: DEHUMIDIFICATION WILL BE ACTIVATED WHEN THE RELATIVE HUMIDITY OR DEW POINT IN THE RETURN DUCT, SPACE, OR G.

CHANGES THE DAT WILL ADJUST ACCORDING TO THE RELATIONSHIP.RESET VARIABLE

LINEAR RELATIONSHIP BETWEEN THE DAT AND THE RESET VARIABLE WILL BE CREATED FOR THE MINIMUM AND MAXIMUM DAT SETPOINTS. AS THE

COOLING DAT RESET: THE COOLING DAT SETPOINT MAY BE RESET BY SPACE, RETURN, OAT OR EXTERNAL VOLTAGE/MA SIGNALS. A II.

MODULATED BY THE VARIABLE SPEED COMPRESSOR OPERATION. WILL BE

THE UNIT COOLING DISCHARGE AIR SET POINT. THE COOLING DAT SET POINT WILL BE ADJUSTABLE AT THE UNIT CONTROLLER. UNIT CAPACITY

DISCHARGE AIR CONTROL: IN THE COOLING MODE, THE UNIT CAPACITY WILL MODULATE THE VARAIBLE SPEED COMPRESSOR TO MAINTAIN I.

COOLING:F.

CHANGES THE DAT WILL ADJUST ACCORDING TO THE RELATIONSHIP. RESET VARIABLE

VARIABLE WILL BE CREATED FOR THE MINIMUM AND MAXIMUM DAT SETPOINTS. AS THE LINEAR RELATIONSHIP BETWEEN THE DAT AND THE RESET

HEATING DAT RESET: THE HEATING DAT SETPOINT MAY BE RESET BY SPACE, RETURN, OAT OR EXTERNAL VOLTAGE/MA SIGNALS. A VI.

GREATER OR LESS THAN THE EFFECTIVE DAT SETPOINT.

STAGED GAS HEAT: THE STAGED GAS HEAT WILL INCREASE OR DECREASE STAGES BASED ON THE STAGE TIMER AND WHETHER THE DAT IS 2.

POINT.

MODULATING GAS HEAT: THE MODULATING GAS HEAT WILL BE MODULATED BY THE UNIT CONTROLLER TO MAINTAIN THE HEATING DAT SET 1.

GAS HEAT: II.

SUPPLEMENTAL HEAT.

SEND HOT GAS TO THE OUTDOOR COIL FOR DEFROST. THE HEATING DISCHARGE AIR TEMPERATURE SET POINT WILL BE MAINTAINED BY THE

CYCLE THE UNIT WILL CLOSE THE OUTDOOR AIR DAMPERS AND ENTER RECIRCULATION, THE UNIT WILL THEN REVERSE OPERATION INTO COOLING TO

DEFROST WILL ONLY BE ACTIVATED WHEN A FACTORY MOUNTED TEMPERATURE SENSOR DETERMINES FROST BUILD UP. DURING THE DEFROST 2.

MODULATE AS REQUIRED TO MAINTAIN THE HEATING DISCHARGE AIR SET POINT.HOT WATER HEAT WILL

TEMPERATURE HEATING SET POINT. IF THE HEAT PUMP CAPACITY IS CANNOT SATISFY THE SET POINT THE SUPPLEMENTAL GAS, ELECTRIC, OR

THE HEAT PUMP WILL ACTIVATE TO SERVE AS PRIMARY HEAT AND WILL MODULATE THE COMPRESSOR TO MEET THE DISCHARGE AIR 1.

HEAT PUMP: I.

CONTROLLER.

HEATING MODE: VAV UNIT HEATING WILL OPERATE TO SUPPLY A HEATING DISCHARGE AIR TEMPERATURE SET POINT ADJUSTABLE AT THE UNIT E.

SUPPLIED SPACE. THE CO2 LEVEL SET POINT SHALL BE ADJUSTABLE AT THE UNIT CONTROLLER.

THE OUTSIDE AIR DAMPER WILL MODULATE AS REQUIRED TO MAINTAIN THE SPACE CO2 LEVEL SET POINT WHEN DCV IS DESIRED FOR THE IV.

A THIRD PARTY SIGNAL.

EXTERNAL RESET: AN EXTERNAL 0-10VDC SIGNAL CAN BE WIRED TO THE UNIT CONTROLLER TO CONTROL THE OA DAMPER POSITION BY III.

REQUIRED BY THE OCCUPANCY.

CO2 READING RISES ABOVE THE PPM SET POINT, THE UNIT CONTROLLER WILL OPEN THE OA DAMPER TO PROVIDE MORE VENTIALTION AIR AS

UNIT CONTROLLER. WHEN THE SPACE OR DUCT DCV: A SPACE OR DUCT MOUNTED CO2 SENSOR WILL SUPPLY A PPM READING TO THE II.

AIR CFM AS MEASURED BY THE FACTORY PROVIDED FLOW STATION.

OUTDOOR AIR MONITOR: THE UNIT CONTROLLER WILL MODULATE THE OUTSIDE AIR DAMPER AS REQUIRED TO MAINTAIN THE MIN OUTSIDE I.

OUTSIDE AIR DAMPER CONTROL:D.

MAINTIAN THE SPACE TEMEPRATURE SET POINT.

SINGLE ZONE VAV: THE SUPPLY FAN WILL OPERATE CONTINUOUSLY. THE UNIT WILL MODULATE THE ECM MOTOR AS REQUIRED TO I.

SUPPLY FAN: THE SUPPLY FAN WILL BE FACTORY SUPPLIED WITH A DIRECT DRIVE ELECTRICALLY COMMUTATED MOTOR (ECM)C.

COOLING SETPOINTS.

CHANGE OF UNIT STATES. THE UNIT STATE WILL CHANGE FROM COOLING, FAN ONLY OR HEATING BASED ON THE CHANGE OVER HEATING OR

CHANGE OVER SETPOINTS: THE UNIT CHANGE OVER SOURCE TEMPERATURE IS THE VARIABLE, SPACE TEMPERATURE (ST), THAT DRIVES THE B.

DURING FRINGE OPERATING CONDITIONS, LIKE HIGH HEAD PRESSURE OR LOW SUCTION CONDITIONS ON DESIGN DAY OPERATION.

ELECTRONIC EXPANSION VALVE TO MAINTAIN A SAFE COMPRESSOR OPERATING CONDITIONS TO ADD RELIABILITY, AND LIMIT UNIT SHUT DOWN

TEMPERATURE CONDITIONS DURING COMPRESSOR OPERATION.THE UNIT WILL MODULATE THE COMPRESSOR, CONDENSER HEAD PRESSURE, AND

COMPRESSOR ENVELOPE CONTROL: THE UNIT CONTROLLER WILL CONTINUALLY MONITOR THE SUCTION AND DISCHARGE PRESSURE AND III.

MOTORS SHOULD BE PROVIDED AS WELL AS FACTORY SENSOR TO PROVIDE THIS PROTECTION.

MAINTAIN HEAD PRESSURE AND THE COMPRESSOR OPERATING ENVELOPE AT ALL TIMES TO AVOID HIGH PRESSURE TRIPS ON HIGH LOAD DAYS. ECM

HEAD PRESSURE CONTROL CONDENSER CONTROL: THE CONDENSER HEAD PRESSURE WILL BE MONITORED BY THE UNIT CONTROLLER TO II.

BUILDING AUTOMATION SYSTEM (BAS) INTERFACE: THE FACTORY UNIT CONTROLLER WILL INTERFACE WITH LON BAS SYSTEMS.I.

UNIT CONTROLS:A.

OCCUPIED:1.

VARIABLE SPEED COMPRESSOR. THE UNIT SHALL BE CONTROLLED USING THE FACTORY UNIT CONTROLLER AS FOLLOWS:

EXPANSION COOLING. THE SUPPLY AND EXHAUST FANS ARE PROVIDED WITH AN ELECTRICALLY COMMUTATED MOTOR (ECM) AND AN INVERTER DRIVEN

VARIABLE AIR VOLUME ROOF TOP UNIT: VARIABLE VOLUME UNIT SHALL CONSIST OF A SUPPLY FAN, EXHAUST FAN, GAS EXCHANGER, AND DIRECT

RTU SEQUENCE AND CONTROL: