block FreezeProtection "Freeze protection sequence for multizone air handling unit" parameter Boolean have_frePro=true "True: enable freeze protection"; parameter Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes buiPreCon=Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefDamper "Type of building pressure control system"; parameter Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection minOADes=Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersAirflow "Design of minimum outdoor air and economizer function"; parameter Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat freSta=Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.No_freeze_stat "Type of freeze stat"; parameter Boolean have_hotWatCoi=true "True: the AHU has heating coil"; parameter Integer minHotWatReq=2 "Minimum heating hot-water plant request to active the heating plant"; parameter Buildings.Controls.OBC.CDL.Types.SimpleController heaCoiCon=Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Heating coil controller"; parameter Real k(unit="1")=1 "Gain of coil controller"; parameter Real Ti(unit="s")=0.5 "Time constant of integrator block"; parameter Real Td(unit="s")=0.1 "Time constant of derivative block"; parameter Real yMax=1 "Upper limit of output"; parameter Real yMin=0 "Lower limit of output"; parameter Real Thys(unit="K")=0.25 "Hysteresis for checking temperature difference"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uOutDamPosMin( final min=0, final max=1, final unit="1") if have_frePro "Minimum economizer damper position limit as returned by the damper position limits sequence"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uOutDam( final min=0, final max=1, final unit="1") "Economizer outdoor air damper commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uHeaCoi( final min=0, final max=1, final unit="1") if have_hotWatCoi "Heating coil commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uMinOutDam( final min=0, final max=1, final unit="1") if minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersAirflow "Minimum outdoor air damper commanded position"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1MinOutDam if minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersPressure "Minimum outdoor air damper command on position"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uRetDam( final min=0, final max=1, final unit="1") "Economizer return air damper commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealInput TAirSup( final unit="K", final displayUnit="degC", final quantity="ThermodynamicTemperature") if have_frePro "Measured supply air temperature"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1FreSta if freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_BAS and have_frePro "Freeze protection stat signal. The stat is normally close (the input is normally true), when enabling freeze protection, the input becomes false"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1SofSwiRes if (freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.No_freeze_stat or freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Freeze protection reset signal from software switch"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1SupFan "Supply fan commanded on"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uSupFan( final min=0, final max=1, final unit="1") "Supply fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1RetFan if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) "Return fan commanded on"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uRetFan( final min=0, final max=1, final unit="1") if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) "Return fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1RelFan if buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan "Relief fan commanded on"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uRelFan( final min=0, final max=1, final unit="1") if buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan "Relief fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uCooCoi( final min=0, final max=1, final unit="1") "Cooling coil commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealInput TAirMix( final unit="K", final displayUnit="degC", final quantity="ThermodynamicTemperature") if have_hotWatCoi and have_frePro "Measured mixed air temperature"; Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yFreProSta "Freeze protection stage index"; Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput y1EneCHWPum if have_frePro "Commanded on to energize chilled water pump"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRetDam( final min=0, final max=1, final unit="1") "Return air damper commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yOutDam( final min=0, final max=1, final unit="1") "Outdoor air damper commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yMinOutDam( final min=0, final max=1, final unit="1") if minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersAirflow "Minimum outdoor air damper commanded position"; Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput y1MinOutDam if minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersPressure "Minimum outdoor air damper command on position"; Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput y1SupFan "Supply fan commanded on"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput ySupFan( final min=0, final max=1, final unit="1") "Supply fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput y1RetFan if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) "Return fan commanded on"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRetFan( final min=0, final max=1, final unit="1") if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) "Return fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput y1RelFan if buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan "Relief fan commanded on"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRelFan( final min=0, final max=1, final unit="1") if buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan "Relief fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yCooCoi( final min=0, final max=1, final unit="1") "Cooling coil commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yHeaCoi( final min=0, final max=1, final unit="1") if have_hotWatCoi "Heating coil commanded position"; Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yHotWatPlaReq if have_hotWatCoi and (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) "Request to heating hot-water plant"; Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yAla if have_frePro "Alarm level"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr( final t=273.15 + 4.4, final h=Thys) if have_frePro "Check if supply air temperature is less than threshold"; Buildings.Controls.OBC.CDL.Logical.Timer tim( final t=300) if have_frePro "Check if the supply air temperature has been lower than threshold value for sufficient long time"; Buildings.Controls.OBC.CDL.Integers.Switch hotWatPlaReq if have_hotWatCoi and have_frePro "Hot water plant request in stage 1 mode"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt( final k=minHotWatReq) if have_hotWatCoi and have_frePro "Minimum hot-water plant requests"; Buildings.Controls.OBC.CDL.Reals.Switch minVen if have_frePro "Minimum ventilation when in stage 1 mode"; Buildings.Controls.OBC.CDL.Reals.PID heaCoiCon1( final controllerType=heaCoiCon, final k=k, final Ti=Ti, final Td=Td, final yMax=yMax, final yMin=yMin) if have_hotWatCoi and have_frePro "Heating coil control in stage 1 mode"; Buildings.Controls.OBC.CDL.Reals.Switch heaCoi1 if have_hotWatCoi and have_frePro "Heating coil position"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr( final t=273.15 + 7, final h=Thys) if have_frePro "Check if supply air temperature is greater than threshold"; Buildings.Controls.OBC.CDL.Logical.Latch lat if have_frePro "Stay in stage 1 freeze protection mode"; Buildings.Controls.OBC.CDL.Logical.Timer tim1( final t=300) if have_frePro "Check if the supply air temperature has been lower than threshold value for sufficient long time"; Buildings.Controls.OBC.CDL.Logical.Edge endStaOne if have_frePro "Clear the latch to end the stage 1 freeze protection"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr1( final t=273.15 + 3.3, final h=Thys) if have_frePro "Check if supply air temperature is less than threshold"; Buildings.Controls.OBC.CDL.Logical.Timer tim2( final t=300) if have_frePro "Check if the supply air temperature has been lower than threshold value for sufficient long time"; Buildings.Controls.OBC.CDL.Logical.TrueFalseHold holSta2( final trueHoldDuration=3600, final falseHoldDuration=0) if have_frePro "Stage in stage 2 freeze protection mode"; Buildings.Controls.OBC.CDL.Reals.Switch outDam2 if have_frePro "Outdoor air damper position"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant con( final k=0) if have_frePro "Fully closed damper position"; Buildings.Controls.OBC.CDL.Reals.Switch minOutDam2 if minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersAirflow and have_frePro "Minimum outdoor air damper position"; Buildings.Controls.OBC.CDL.Reals.Switch retDam2 if have_frePro "Return air damper position"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant con1( final k=1) if have_frePro "Fully open damper or valve position"; Buildings.Controls.OBC.CDL.Integers.Switch intSwi1 if have_frePro "Alarm when it is in stage 2 mode"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt1( final k=3) if have_frePro "Level 3 alarm"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt2( final k=0) if have_hotWatCoi and have_frePro "Zero request"; Buildings.Controls.OBC.CDL.Logical.Timer tim3( final t=900) if have_frePro "Check if the supply air temperature has been lower than threshold value for sufficient long time"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr2( final t=273.15 + 1, final h=Thys) if have_frePro "Check if supply air temperature is less than threshold"; Buildings.Controls.OBC.CDL.Logical.Timer tim4( final t=300) if have_frePro "Check if the supply air temperature has been lower than threshold value for sufficient long time"; Buildings.Controls.OBC.CDL.Logical.Or3 or3 if have_frePro "Check if it should be in stage 3 mode"; Buildings.Controls.OBC.CDL.Logical.Sources.Constant con2( final k=false) if not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_BAS and have_frePro "Constant false"; Buildings.Controls.OBC.CDL.Logical.Latch lat1 if have_frePro "Stay in stage 3 freeze protection mode"; Buildings.Controls.OBC.CDL.Reals.Switch supFan if (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Supply fan speed"; Buildings.Controls.OBC.CDL.Reals.Switch retFan if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) and (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Return fan speed"; Buildings.Controls.OBC.CDL.Reals.Switch relFan if buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan and (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Relief fan speed"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant con3( final k=0) if have_frePro "Zero constant"; Buildings.Controls.OBC.CDL.Reals.Switch outDam if not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment and have_frePro "Outdoor air damper"; Buildings.Controls.OBC.CDL.Reals.Switch cooCoi if not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment and have_frePro "Cooling coil position"; Buildings.Controls.OBC.CDL.Integers.Switch hotWatPlaReq3 if have_hotWatCoi and (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Hot water plant request in stage 3 mode"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt3( final k=minHotWatReq) if have_hotWatCoi and (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Minimum hot-water plant requests"; Buildings.Controls.OBC.CDL.Reals.Max max1 if have_hotWatCoi and have_frePro "Higher of supply air and mixed air temperature"; Buildings.Controls.OBC.CDL.Reals.PID heaCoiMod( final controllerType=heaCoiCon, final k=k, final Ti=Ti, final Td=Td, final yMax=yMax, final yMin=yMin) if have_hotWatCoi and have_frePro "Heating coil control when it is in stage 3 mode"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant con4( final k=273.15 + 27) if have_hotWatCoi and have_frePro "Setpoint temperature"; Buildings.Controls.OBC.CDL.Reals.Switch heaCoiPos if have_hotWatCoi and ( not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Heating coil position"; Buildings.Controls.OBC.CDL.Integers.Switch intSwi3 if have_frePro "Alarm level"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt4( final k=2) if have_frePro "Level 2 alarm"; Buildings.Controls.OBC.CDL.Utilities.Assert shuDowWar( final message="Warning: the unit is shut down by freeze protection!") if have_frePro "Unit shut down warning"; Buildings.Controls.OBC.CDL.Logical.Not not1 if have_frePro "Logical not"; Buildings.Controls.OBC.CDL.Utilities.Assert disMinVenWar( final message="Warning: minimum ventilation was interrupted by freeze protection!") if have_frePro "Warning of disabling minimum ventilation "; Buildings.Controls.OBC.CDL.Logical.Not not2 if have_frePro "Logical not"; Buildings.Controls.OBC.CDL.Logical.Timer tim5( final t=3600) if have_frePro "Check if it has been in stage 2 for sufficient long time"; Buildings.Controls.OBC.CDL.Reals.Switch minOutDam if minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersAirflow and (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Minimum outdoor air damper position"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt5( final k=0) if have_frePro "Level 0 alarm"; Buildings.Controls.OBC.CDL.Logical.Latch lat2 if have_frePro "Stay in stage 2 freeze protection mode"; Buildings.Controls.OBC.CDL.Logical.Edge endStaTwo if have_frePro "Clear the latch to end the stage 2 freeze protection"; Buildings.Controls.OBC.CDL.Logical.Or or2 if have_frePro "Start stage 1 freeze protection mode"; Buildings.Controls.OBC.CDL.Reals.Switch retDam if not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment and have_frePro "Return air damper position"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant supTemSet( final k=273.15+ 6) if have_hotWatCoi and have_frePro "Supply air temperature setpoint"; Buildings.Controls.OBC.CDL.Integers.Switch intSwi2 if have_frePro "Alarm level"; Buildings.Controls.OBC.CDL.Integers.Switch intSwi4 if have_frePro "Alarm level"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt6( final k=2) if have_frePro "Stage 2 freeze protection"; Buildings.Controls.OBC.CDL.Integers.Switch intSwi5 if have_frePro "Alarm level"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt7( final k=1) if have_frePro "Stage 1 freeze protection"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt8( final k=0) if have_frePro "Stage 0 freeze protection"; Buildings.Controls.OBC.CDL.Logical.Switch minOutDam3 if minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersPressure and have_frePro "Minimum outdoor air damper command on position"; Buildings.Controls.OBC.CDL.Logical.Sources.Constant con5( final k=false) if minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersPressure and have_frePro "False"; Buildings.Controls.OBC.CDL.Logical.Switch minOutDam1 if (minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersPressure and not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Minimum outdoor air damper command on position"; Buildings.Controls.OBC.CDL.Logical.Not norFal if freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_BAS and have_frePro "The output is normally false"; Buildings.Controls.OBC.CDL.Logical.FallingEdge falEdg if freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_BAS and have_frePro "Reset the freeze protection by the physical reset switch in freeze stat"; Buildings.Controls.OBC.CDL.Logical.And and1 if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) and (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Disable return fan when in stage 3"; Buildings.Controls.OBC.CDL.Logical.Not norSta3 if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) and have_frePro "Not in stage 3"; Buildings.Controls.OBC.CDL.Logical.Not norSta1 if have_frePro "Not in stage 3"; Buildings.Controls.OBC.CDL.Logical.And and2 if (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Disable supply fan when in stage 3"; Buildings.Controls.OBC.CDL.Logical.Not norSta2 if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan) and have_frePro "Not in stage 3"; Buildings.Controls.OBC.CDL.Logical.And and3 if buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan and (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Disable relief fan when in stage 3"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai( final k=1) if (have_hotWatCoi and freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai1( final k=1) if freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment and have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai2( final k=1) if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan and freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Logical.Or or1 if buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan and (freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment or not have_frePro) "Dummy block for enabling and disabling conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai3( final k=1) if ((buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) and freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Logical.Or or4 if (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) and (freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment or not have_frePro) "Dummy block for enabling and disabling conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai4( final k=1) if freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment and have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai5( final k=1) if freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment and have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai6( final k=1) if (minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersAirflow and freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) and have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Logical.Or or5 if minOADes == Buildings.Controls.OBC.ASHRAE.G36.Types.OutdoorAirSection.DedicatedDampersPressure and (freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment or not have_frePro) "Dummy block for enabling and disabling conditional connection"; Buildings.Controls.OBC.CDL.Logical.Or or6 if (freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment) or (not have_frePro) "Dummy block for enabling and disabling conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai7( final k=1) if freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment and have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai8(final k=1) if not have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt9(final k=0) if not have_frePro "Dummy constant"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai9(final k=1) if not have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai10(final k=1) if not have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai11(final k=1) if not have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai12(final k=1) if (not have_frePro) and (buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanMeasuredAir or buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReturnFanDp) "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai13(final k=1) if (not have_frePro) and buiPreCon == Buildings.Controls.OBC.ASHRAE.G36.Types.BuildingPressureControlTypes.ReliefFan "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai14(final k=1) if not have_frePro "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai15(final k=1) if (not have_frePro) and have_hotWatCoi "Dummy block for enabling and disabling the conditional connection"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt10(final k=0) if (not have_frePro) and (have_hotWatCoi and (not freSta == Buildings.Controls.OBC.ASHRAE.G36.Types.FreezeStat.Hardwired_to_equipment)) "Dummy constant"; equation connect(lesThr.y, tim.u); connect(TAirSup, lesThr.u); connect(conInt.y, hotWatPlaReq.u1); connect(uOutDamPosMin, minVen.u1); connect(supTemSet.y, heaCoiCon1.u_s); connect(TAirSup, heaCoiCon1.u_m); connect(heaCoiCon1.y, heaCoi1.u1); connect(TAirSup, greThr.u); connect(greThr.y, tim1.u); connect(tim1.passed, endStaOne.u); connect(endStaOne.y, lat.clr); connect(lat.y, hotWatPlaReq.u2); connect(lat.y, minVen.u2); connect(lat.y, heaCoi1.u2); connect(TAirSup, lesThr1.u); connect(lesThr1.y, tim2.u); connect(tim2.passed, holSta2.u); connect(con.y, outDam2.u1); connect(con.y, minOutDam2.u1); connect(con1.y, retDam2.u1); connect(uRetDam, retDam2.u3); connect(conInt1.y, intSwi1.u1); connect(lesThr1.y, tim3.u); connect(lesThr2.y, tim4.u); connect(TAirSup, lesThr2.u); connect(tim3.passed, or3.u1); connect(tim4.passed, or3.u2); connect(con2.y, or3.u3); connect(u1SofSwiRes, lat1.clr); connect(lat1.y, supFan.u2); connect(lat1.y, retFan.u2); connect(lat1.y, relFan.u2); connect(con3.y, supFan.u1); connect(con3.y, retFan.u1); connect(con3.y, relFan.u1); connect(uSupFan, supFan.u3); connect(uRetFan, retFan.u3); connect(uRelFan, relFan.u3); connect(supFan.y, ySupFan); connect(relFan.y, yRelFan); connect(retFan.y, yRetFan); connect(con3.y, outDam.u1); connect(lat1.y, outDam.u2); connect(uCooCoi, cooCoi.u3); connect(lat1.y, cooCoi.u2); connect(con1.y, cooCoi.u1); connect(conInt3.y, hotWatPlaReq3.u1); connect(lat1.y, hotWatPlaReq3.u2); connect(TAirMix, max1.u2); connect(TAirSup, max1.u1); connect(max1.y, heaCoiMod.u_m); connect(con4.y, heaCoiMod.u_s); connect(heaCoiMod.y, heaCoiPos.u1); connect(lat1.y, heaCoiPos.u2); connect(lat1.y, intSwi3.u2); connect(conInt4.y, intSwi3.u1); connect(lat1.y, not1.u); connect(not1.y, shuDowWar.u); connect(not2.y, disMinVenWar.u); connect(holSta2.y, tim5.u); connect(lat1.y, minOutDam.u2); connect(con3.y, minOutDam.u1); connect(uOutDam, minVen.u3); connect(minVen.y, outDam2.u3); connect(outDam2.y, outDam.u3); connect(conInt2.y, hotWatPlaReq.u3); connect(conInt5.y, intSwi1.u3); connect(intSwi1.y, intSwi3.u3); connect(intSwi3.y, yAla); connect(hotWatPlaReq.y, hotWatPlaReq3.u3); connect(hotWatPlaReq3.y, yHotWatPlaReq); connect(minOutDam2.y, minOutDam.u3); connect(minOutDam.y, yMinOutDam); connect(uMinOutDam, minOutDam2.u3); connect(uHeaCoi, heaCoi1.u3); connect(heaCoi1.y, heaCoiPos.u3); connect(heaCoiPos.y, yHeaCoi); connect(holSta2.y, lat2.u); connect(tim5.passed, endStaTwo.u); connect(endStaTwo.y, lat2.clr); connect(lat2.y, outDam2.u2); connect(lat2.y, minOutDam2.u2); connect(lat2.y, not2.u); connect(lat2.y, retDam2.u2); connect(lat2.y, intSwi1.u2); connect(tim.passed, or2.u1); connect(or2.y, lat.u); connect(lat1.y, retDam.u2); connect(con3.y, retDam.u1); connect(retDam2.y, retDam.u3); connect(retDam.y, yRetDam); connect(lat1.y, y1EneCHWPum); connect(outDam.y, yOutDam); connect(cooCoi.y, yCooCoi); connect(conInt1.y, intSwi2.u1); connect(lat1.y, intSwi2.u2); connect(lat2.y, intSwi4.u2); connect(conInt6.y, intSwi4.u1); connect(intSwi4.y, intSwi2.u3); connect(lat.y, intSwi5.u2); connect(intSwi5.y, intSwi4.u3); connect(conInt7.y, intSwi5.u1); connect(intSwi2.y, yFreProSta); connect(conInt8.y, intSwi5.u3); connect(endStaTwo.y, or2.u2); connect(u1MinOutDam, minOutDam3.u3); connect(lat2.y, minOutDam3.u2); connect(con5.y, minOutDam3.u1); connect(lat1.y, minOutDam1.u2); connect(minOutDam1.y, y1MinOutDam); connect(minOutDam3.y, minOutDam1.u3); connect(con5.y, minOutDam1.u1); connect(u1FreSta,norFal. u); connect(or3.y, lat1.u); connect(falEdg.y, lat1.clr); connect(u1RetFan, and1.u1); connect(and1.y, y1RetFan); connect(norSta3.y, and1.u2); connect(lat1.y, norSta3.u); connect(u1SupFan, and2.u1); connect(and2.y, y1SupFan); connect(norSta1.y, and2.u2); connect(lat1.y, norSta1.u); connect(u1RelFan, and3.u1); connect(and3.y, y1RelFan); connect(norSta2.y,and3. u2); connect(lat1.y, norSta2.u); connect(uHeaCoi, gai.u); connect(gai.y, yHeaCoi); connect(uCooCoi, gai1.u); connect(gai1.y, yCooCoi); connect(uRelFan, gai2.u); connect(gai2.y, yRelFan); connect(u1RelFan, or1.u1); connect(u1RelFan, or1.u2); connect(or1.y, y1RelFan); connect(uRetFan, gai3.u); connect(gai3.y, yRetFan); connect(u1RetFan, or4.u1); connect(u1RetFan, or4.u2); connect(or4.y, y1RetFan); connect(uRetDam, gai4.u); connect(gai4.y, yRetDam); connect(uOutDam, gai5.u); connect(gai5.y, yOutDam); connect(uMinOutDam, gai6.u); connect(gai6.y, yMinOutDam); connect(u1MinOutDam, or5.u1); connect(u1MinOutDam, or5.u2); connect(or5.y, y1MinOutDam); connect(u1SupFan, or6.u1); connect(u1SupFan, or6.u2); connect(or6.y, y1SupFan); connect(uSupFan, gai7.u); connect(gai7.y, ySupFan); connect(norFal.y, falEdg.u); connect(norFal.y, or3.u3); connect(conInt9.y, yFreProSta); connect(gai8.y, yRetDam); connect(gai9.y, yOutDam); connect(uRetDam, gai8.u); connect(uOutDam, gai9.u); connect(gai10.y, yMinOutDam); connect(uMinOutDam, gai10.u); connect(gai11.y, ySupFan); connect(uSupFan, gai11.u); connect(uRetFan, gai12.u); connect(gai12.y, yRetFan); connect(uRelFan, gai13.u); connect(gai13.y, yRelFan); connect(uCooCoi, gai14.u); connect(gai14.y, yCooCoi); connect(gai15.y, yHeaCoi); connect(uHeaCoi, gai15.u); connect(conInt10.y, yHotWatPlaReq); end FreezeProtection;

block PlantRequests "Output plant requests for multizone air handling unit" parameter Boolean have_hotWatCoi = true "True: the AHU has hot water coil"; parameter Real Thys = 0.1 "Hysteresis for checking temperature difference"; parameter Real posHys = 0.05 "Hysteresis for checking valve position difference"; Buildings.Controls.OBC.CDL.Interfaces.RealInput TAirSup( final unit="K", final displayUnit="degC", final quantity="ThermodynamicTemperature") "Measured supply air temperature"; Buildings.Controls.OBC.CDL.Interfaces.RealInput TAirSupSet( final unit="K", final displayUnit="degC", final quantity="ThermodynamicTemperature") "Setpoint for supply air temperature"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uCooCoi_actual( final unit="1", final min=0, final max=1) "Actual cooling coil valve position"; Buildings.Controls.OBC.CDL.Interfaces.RealInput uHeaCoi_actual( final unit="1", final min=0, final max=1) if have_hotWatCoi "Actual heating coil valve position"; Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yChiWatResReq "Chilled water reset request"; Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yChiPlaReq "Chiller plant request"; Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yHotWatResReq if have_hotWatCoi "Hot water reset request"; Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput yHotWatPlaReq if have_hotWatCoi "Hot water plant request"; protected Buildings.Controls.OBC.CDL.Reals.Subtract cooSupTemDif "Find the cooling supply temperature difference to the setpoint"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr( final t=3, final h=Thys) "Check if the supply temperature is greater than the setpoint by a threshold value"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr1( final t=2, final h=Thys) "Check if the supply temperature is greater than the setpoint by a threshold value"; Buildings.Controls.OBC.CDL.Logical.TrueDelay truDel( final delayTime=120) "Check if the input has been true for a certain time"; Buildings.Controls.OBC.CDL.Logical.TrueDelay truDel1( final delayTime=120) "Check if the input has been true for a certain time"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr2( final t=0.95, final h=posHys) "Check if the chilled water valve position is greater than a threshold value"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant thr( final k=3) "Constant 3"; Buildings.Controls.OBC.CDL.Integers.Switch chiWatRes3 "Send 3 chilled water reset request"; Buildings.Controls.OBC.CDL.Integers.Switch chiWatRes2 "Send 2 chilled water reset request"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant two( final k=2) "Constant 2"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr( final t=0.85, final h=posHys) "Check if the chilled water valve position is less than a threshold value"; Buildings.Controls.OBC.CDL.Logical.Latch lat "Keep true signal until other condition becomes true"; Buildings.Controls.OBC.CDL.Integers.Switch chiWatRes1 "Send 1 chilled water reset request"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant one( final k=1) "Constant 1"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant zer( final k=0) "Constant 0"; Buildings.Controls.OBC.CDL.Logical.Latch lat1 "Keep true signal until other condition becomes true"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr1( final t=0.1, final h=posHys) "Check if the chilled water valve position is less than a threshold value"; Buildings.Controls.OBC.CDL.Integers.Switch intSwi3 "Send 1 chiller plant request"; Buildings.Controls.OBC.CDL.Reals.Subtract heaSupTemDif if have_hotWatCoi "Find the heating supply temperature difference to the setpoint"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr3( final t=17, final h=Thys) if have_hotWatCoi "Check if the supply temperature is less than the setpoint by a threshold value"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr4( final t=8, final h=Thys) if have_hotWatCoi "Check if the supply temperature is less than the setpoint by a threshold value"; Buildings.Controls.OBC.CDL.Logical.TrueDelay truDel2( final delayTime=300) if have_hotWatCoi "Check if the input has been true for a certain time"; Buildings.Controls.OBC.CDL.Logical.TrueDelay truDel3( final delayTime=300) if have_hotWatCoi "Check if the input has been true for a certain time"; Buildings.Controls.OBC.CDL.Integers.Switch hotWatRes3 if have_hotWatCoi "Send 3 hot water reset request"; Buildings.Controls.OBC.CDL.Integers.Switch hotWatRes2 if have_hotWatCoi "Send 2 hot water reset request"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr2( final t=0.85, final h=posHys) if have_hotWatCoi "Check if the hot water valve position is less than a threshold value"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr5( final t=0.95, final h=posHys) if have_hotWatCoi "Check if the hot water valve position is greater than a threshold value"; Buildings.Controls.OBC.CDL.Logical.Latch lat2 if have_hotWatCoi "Keep true signal until other condition becomes true"; Buildings.Controls.OBC.CDL.Integers.Switch hotWatRes1 if have_hotWatCoi "Send 1 hot water reset request"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr3( final t=0.1, final h=posHys) if have_hotWatCoi "Check if the hot water valve position is less than a threshold value"; Buildings.Controls.OBC.CDL.Logical.Latch lat3 if have_hotWatCoi "Keep true signal until other condition becomes true"; Buildings.Controls.OBC.CDL.Integers.Switch intSwi1 if have_hotWatCoi "Send 1 hot water plant request"; equation connect(TAirSup, cooSupTemDif.u1); connect(TAirSupSet, cooSupTemDif.u2); connect(cooSupTemDif.y, greThr.u); connect(greThr.y, truDel.u); connect(greThr1.y, truDel1.u); connect(cooSupTemDif.y, greThr1.u); connect(uCooCoi_actual, greThr2.u); connect(truDel.y, chiWatRes3.u2); connect(thr.y, chiWatRes3.u1); connect(truDel1.y, chiWatRes2.u2); connect(two.y, chiWatRes2.u1); connect(greThr2.y, lat.u); connect(uCooCoi_actual, lesThr.u); connect(lesThr.y, lat.clr); connect(one.y, chiWatRes1.u1); connect(lat.y, chiWatRes1.u2); connect(chiWatRes1.y, chiWatRes2.u3); connect(chiWatRes2.y, chiWatRes3.u3); connect(zer.y, chiWatRes1.u3); connect(chiWatRes3.y, yChiWatResReq); connect(greThr2.y, lat1.u); connect(uCooCoi_actual, lesThr1.u); connect(lesThr1.y, lat1.clr); connect(lat1.y, intSwi3.u2); connect(one.y, intSwi3.u1); connect(zer.y, intSwi3.u3); connect(intSwi3.y, yChiPlaReq); connect(TAirSupSet, heaSupTemDif.u1); connect(TAirSup, heaSupTemDif.u2); connect(greThr3.y, truDel2.u); connect(greThr4.y, truDel3.u); connect(heaSupTemDif.y, greThr3.u); connect(heaSupTemDif.y, greThr4.u); connect(truDel2.y, hotWatRes3.u2); connect(thr.y, hotWatRes3.u1); connect(hotWatRes2.y, hotWatRes3.u3); connect(two.y, hotWatRes2.u1); connect(truDel3.y, hotWatRes2.u2); connect(hotWatRes3.y, yHotWatResReq); connect(uHeaCoi_actual, greThr5.u); connect(greThr5.y, lat2.u); connect(uHeaCoi_actual, lesThr2.u); connect(lesThr2.y, lat2.clr); connect(lat2.y, hotWatRes1.u2); connect(one.y, hotWatRes1.u1); connect(zer.y, hotWatRes1.u3); connect(hotWatRes1.y, hotWatRes2.u3); connect(uHeaCoi_actual, lesThr3.u); connect(lesThr3.y, lat3.clr); connect(greThr5.y, lat3.u); connect(lat3.y, intSwi1.u2); connect(one.y, intSwi1.u1); connect(zer.y, intSwi1.u3); connect(intSwi1.y, yHotWatPlaReq); end PlantRequests;

block ReliefDamper "Relief damper control for AHUs using actuated dampers without fan" parameter Real dpBuiSet( final unit="Pa", final quantity="PressureDifference", max=30) = 12 "Building static pressure difference relative to ambient (positive to pressurize the building)"; parameter Real k(min=0, unit="1") = 0.5 "Gain, applied to building pressure control error normalized with dpBuiSet"; Buildings.Controls.OBC.CDL.Interfaces.RealInput dpBui( final unit="Pa", displayUnit="Pa") "Building static pressure difference, relative to ambient (positive if pressurized)"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1SupFan "Supply fan status"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRelDam( final unit="1", final min=0, final max=1) "Relief damper commanded position"; protected Buildings.Controls.OBC.CDL.Reals.Switch swi "Check if relief damper should be enabled"; Buildings.Controls.OBC.CDL.Reals.Subtract conErr( u1(final unit="Pa", displayUnit="Pa"), u2(final unit="Pa", displayUnit="Pa"), y(final unit="Pa", displayUnit="Pa")) "Control error"; Buildings.Controls.OBC.CDL.Reals.PID conP( final controllerType=Buildings.Controls.OBC.CDL.Types.SimpleController.P, final k=k, final reverseActing=false) "Building static pressure controller"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant zerDam( final k=0) "Close damper when disabled"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant dpBuiSetPoi( final k=dpBuiSet) "Building pressure setpoint"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant zer( final k=0) "Zero constant"; equation connect(u1SupFan, swi.u2); connect(dpBuiSetPoi.y, conErr.u2); connect(conErr.y, conP.u_m); connect(zer.y, conP.u_s); connect(conP.y, swi.u1); connect(zerDam.y, swi.u3); connect(dpBui, conErr.u1); connect(swi.y, yRelDam); end ReliefDamper;

block ReliefFan "Sequence for control of relief fan in AHU" parameter Real relFanSpe_min( final min=0, final max=1)= 0.1 "Relief fan minimum speed"; parameter Real dpBuiSet( final unit="Pa", final quantity="PressureDifference", final max=30) = 12 "Building static pressure difference relative to ambient (positive to pressurize the building)"; parameter Real k( final unit="1") = 1 "Gain, normalized using dpBuiSet"; parameter Real hys = 0.005 "Hysteresis for checking the controller output value"; Buildings.Controls.OBC.CDL.Interfaces.RealInput dpBui( unit="Pa", displayUnit="Pa", final quantity="PressureDifference") "Building static pressure difference, relative to ambient (positive if pressurized)"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1SupFan "AHU supply fan proven on status"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yDpBui( unit="Pa", displayUnit="Pa", final quantity="PressureDifference") "Building static pressure difference, relative to ambient (positive if pressurized)"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yDam( final unit="1", final min=0, final max=1) "Damper commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRelFan( final unit="1", final max=1) "Relief fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput y1RelFan "Relief fan commanded on"; Buildings.Controls.OBC.CDL.Reals.MovingAverage movMea( final delta=300) "Average building static pressure measurement"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant dpBuiSetPoi( final k=dpBuiSet) "Building pressure setpoint"; Buildings.Controls.OBC.CDL.Reals.Divide div1 "Normalized the control error"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant conOne( final k=1) "Constant one"; Buildings.Controls.OBC.CDL.Reals.PID conP( final controllerType=Buildings.Controls.OBC.CDL.Types.SimpleController.P, final k=k, final reverseActing=false) "Building static pressure controller"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr( final t=0.05, final h=hys) "Check if the controller output is greater than threshold"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr( final t=0.005, final h=hys) "Check if the controller output is near zero"; Buildings.Controls.OBC.CDL.Logical.Timer tim( final t=300) "Check if the controller output has been near zero for threshold time"; Buildings.Controls.OBC.CDL.Logical.And and2 "Check if the controller output is greater than threshold and the relief system has been enabled"; Buildings.Controls.OBC.CDL.Logical.Latch lat "Enable damper"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr2( final t=relFanSpe_min + 0.15, final h=hys) "Check if the controller output is greater than minimum speed plus threshold"; Buildings.Controls.OBC.CDL.Logical.Timer upTim( final t=420) "Check if the controller output has been greater than threshold for sufficient long time"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr3( final t=relFanSpe_min, final h=hys) "Check if the controller output is less than minimum speed"; Buildings.Controls.OBC.CDL.Logical.Timer dowTim( final t=300) "Check if the controller output has been less than threshold for sufficient long time"; Buildings.Controls.OBC.CDL.Logical.Latch lat1 "Stage down lag fan"; Buildings.Controls.OBC.CDL.Logical.Or relDam "Open relief damper"; Buildings.Controls.OBC.CDL.Logical.And relFan "Turn on relief fan"; Buildings.Controls.OBC.CDL.Conversions.BooleanToReal booToRea2 "Convert boolean to real"; Buildings.Controls.OBC.CDL.Reals.Multiply pro1 "Relief fan speed"; Buildings.Controls.OBC.CDL.Conversions.BooleanToReal booToRea1 "Convert boolean to real"; equation connect(dpBui, movMea.u); connect(dpBuiSetPoi.y, div1.u2); connect(movMea.y, div1.u1); connect(div1.y, conP.u_m); connect(conOne.y, conP.u_s); connect(conP.y, greThr.u); connect(greThr.y, and2.u1); connect(conP.y, lesThr.u); connect(lesThr.y, tim.u); connect(tim.passed, lat.clr); connect(and2.y, lat.u); connect(u1SupFan, and2.u2); connect(conP.y, greThr2.u); connect(greThr2.y, upTim.u); connect(conP.y, lesThr3.u); connect(lesThr3.y, dowTim.u); connect(upTim.passed, lat1.u); connect(dowTim.passed, lat1.clr); connect(lat.y, relDam.u1); connect(u1SupFan, relFan.u1); connect(lat1.y, relFan.u2); connect(relFan.y, relDam.u2); connect(relFan.y, booToRea2.u); connect(booToRea2.y, pro1.u2); connect(conP.y, pro1.u1); connect(movMea.y, yDpBui); connect(relDam.y, booToRea1.u); connect(booToRea1.y, yDam); connect(pro1.y, yRelFan); connect(relFan.y, y1RelFan); end ReliefFan;

block ReliefFanGroup "Sequence for controlling relief fan group" parameter Integer nSupFan = 2 "Total number of AHU supply fans that are serving the same common space"; parameter Integer nRelFan = 4 "Total number of relief fans that are serving the same common space"; parameter Real relFanSpe_min( final min=0, final max=1)= 0.1 "Relief fan minimum speed"; parameter Integer staVec[nRelFan] = {2,3,1,4} "Vector of the order for staging up relief fan, i.e. the 1st element means the 1st relief fan and its value showing its sequence when staging up"; parameter Integer relFanMat[nRelFan, nSupFan] = {{1,0},{1,0},{0,1},{0,1}} "Relief fan matrix with relief fan as row index and AHU supply fan as column index. It flags which relief fan is associated with which supply fan"; parameter Real dpBuiSet( final unit="Pa", final quantity="PressureDifference", final max=30) = 12 "Building static pressure difference relative to ambient (positive to pressurize the building)"; parameter Real k( final unit="1") = 1 "Gain, normalized using dpBuiSet"; parameter Real hys = 0.005 "Hysteresis for checking the controller output value"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1SupFan[nSupFan] "AHU supply fan proven on status"; Buildings.Controls.OBC.CDL.Interfaces.RealInput dpBui( unit="Pa", displayUnit="Pa", final quantity="PressureDifference") "Building static pressure difference, relative to ambient (positive if pressurized)"; Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uRelFanAla[nRelFan] "Relief fan current alarm index"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1RelFan[nRelFan] "Relief fan proven on status"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yDpBui( unit="Pa", displayUnit="Pa", final quantity="PressureDifference") "Building static pressure difference, relative to ambient (positive if pressurized)"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRelFan[nRelFan]( final unit=fill("1", nRelFan), final max=fill(1, nRelFan)) "Relief fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yDam[nRelFan]( final unit=fill("1",nRelFan), final min=fill(0,nRelFan), final max=fill(1,nRelFan)) "Damper commanded position"; Buildings.Controls.OBC.CDL.Reals.MatrixGain enaRel( final K=relFanMat) "Vector of relief fans with the enabled one denoted by 1"; Buildings.Controls.OBC.CDL.Conversions.BooleanToReal booToRea[nSupFan] "Convert boolean to real"; Buildings.Controls.OBC.CDL.Reals.MultiplyByParameter gai[nRelFan]( final k=staVec) "Vector of enabling fan, along with its staging order"; Buildings.Controls.OBC.CDL.Reals.MovingAverage movMea( final delta=300) "Average building static pressure measurement"; Buildings.Controls.OBC.CDL.Reals.Divide div1 "Normalized the control error"; Buildings.Controls.OBC.CDL.Reals.PID conP( final controllerType=Buildings.Controls.OBC.CDL.Types.SimpleController.P, final k=k, final reverseActing=false) "Building static pressure controller"; Buildings.Controls.OBC.CDL.Logical.MultiOr enaRelGro( final nin=nSupFan) "Relief group enabling status"; Buildings.Controls.OBC.CDL.Conversions.BooleanToReal booToRea1 "Convert boolean to real"; Buildings.Controls.OBC.CDL.Reals.Multiply pro "Set controller output to zero when the relief system is disabled"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr( final t=0.05, final h=hys) "Check if the controller output is greater than threshold"; Buildings.Controls.OBC.CDL.Logical.And and2 "Check if the controller output is greater than threshold and the relief system has been enabled"; Buildings.Controls.OBC.CDL.Logical.Latch lat "Enable damper"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr( final t=0.005, final h=hys) "Check if the controller output is near zero"; Buildings.Controls.OBC.CDL.Logical.Timer tim( final t=300) "Check if the controller output has been near zero for threshold time"; Buildings.Controls.OBC.CDL.Routing.BooleanScalarReplicator booRep( final nout=nRelFan) "Boolean replicator"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr1[nRelFan]( final t=fill(0.5, nRelFan)) "Check if a relief fan should be enabled"; Buildings.Controls.OBC.CDL.Logical.And enaDam[nRelFan] "Enable damper"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr2( final t=relFanSpe_min + 0.15, final h=hys) "Check if the controller output is greater than minimum speed plus threshold"; Buildings.Controls.OBC.CDL.Logical.Timer upTim( final t=420) "Check if the controller output has been greater than threshold for sufficient long time"; Buildings.Controls.OBC.CDL.Logical.Pre pre( final pre_u_start=true) "Break algebraic loop"; Buildings.Controls.OBC.CDL.Conversions.BooleanToReal booToRea2[nRelFan] "Convert boolean to real"; Buildings.Controls.OBC.CDL.Reals.Subtract sub2[nRelFan] "Identify relief fans that have been enabled but not yet operating"; Buildings.Controls.OBC.CDL.Reals.Multiply pro1[nRelFan] "List of standby fans, along with their staging order"; Buildings.Controls.OBC.CDL.Reals.MultiMin mulMin(nin=nRelFan) "Identify current order of staging"; Buildings.Controls.OBC.CDL.Routing.RealScalarReplicator reaRep( final nout=nRelFan) "Replicate real number"; Buildings.Controls.OBC.CDL.Reals.Subtract sub1[nRelFan] "Identify next operating fan"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr1[nRelFan]( final t=fill(0.5, nRelFan)) "Check if the input is less than threshold"; Buildings.Controls.OBC.CDL.Reals.AddParameter addPar[nRelFan]( final p=fill(nRelFan + 1, nRelFan)) "Add value to the input"; Buildings.Controls.OBC.CDL.Reals.Switch swi[nRelFan] "Switch input values"; Buildings.Controls.OBC.CDL.Reals.Abs abs1[nRelFan] "Find absolute value"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr2[nRelFan]( final t=fill(0.5, nRelFan)) "Identify next operating fan"; Buildings.Controls.OBC.CDL.Logical.Or or2[nRelFan] "Targeted vector of operating relief fan after one new fan being turned on"; Buildings.Controls.OBC.CDL.Logical.Latch lat2 "Stage up next relief fan"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr3( final t=relFanSpe_min, final h=hys) "Check if the controller output is less than minimum speed"; Buildings.Controls.OBC.CDL.Logical.Timer dowTim( final t=300) "Check if the controller output has been less than threshold for sufficient long time"; Buildings.Controls.OBC.CDL.Logical.Pre pre1( final pre_u_start=true) "Break algebraic loop"; Buildings.Controls.OBC.CDL.Reals.Multiply pro2[nRelFan] "List of operating fans, along with their staging order"; Buildings.Controls.OBC.CDL.Reals.AddParameter addPar1[nRelFan]( final p=fill(nRelFan + 1, nRelFan)) "Add value to the input"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr4[nRelFan]( final t=fill(0.5, nRelFan)) "Check if the input is less than threshold"; Buildings.Controls.OBC.CDL.Reals.Switch swi1[nRelFan] "Switch input values"; Buildings.Controls.OBC.CDL.Reals.MultiMin mulMin1( final nin=nRelFan) "Minimum staging order of the running relief fans"; Buildings.Controls.OBC.CDL.Reals.Subtract sub3[nRelFan] "Identify next operating fan"; Buildings.Controls.OBC.CDL.Reals.Abs abs2[nRelFan] "Find absolute value"; Buildings.Controls.OBC.CDL.Reals.LessThreshold lesThr5[nRelFan]( final t=fill(0.5, nRelFan)) "Identify next fan to be off"; Buildings.Controls.OBC.CDL.Routing.RealScalarReplicator reaRep1( final nout=nRelFan) "Replicate real number"; Buildings.Controls.OBC.CDL.Logical.Xor xor[nRelFan] "Vector of relief fan after one fan being turned off"; Buildings.Controls.OBC.CDL.Conversions.BooleanToInteger booToInt[nRelFan] "Convert boolean to integer"; Buildings.Controls.OBC.CDL.Conversions.BooleanToInteger booToInt1[nRelFan] "Convert boolean to integer"; Buildings.Controls.OBC.CDL.Conversions.BooleanToInteger booToInt2[nRelFan] "Convert boolean to integer"; Buildings.Controls.OBC.CDL.Integers.Equal intEqu[nRelFan] "Check if newly started fan has become proven on"; Buildings.Controls.OBC.CDL.Logical.MultiAnd mulAnd( final nin=nRelFan) "Check if newly started fan has become proven on"; Buildings.Controls.OBC.CDL.Integers.Equal intEqu1[nRelFan] "Check if newly turned off fan has become off"; Buildings.Controls.OBC.CDL.Logical.MultiAnd mulAnd2( final nin=nRelFan) "Check if newly turned off fan has become off"; Buildings.Controls.OBC.CDL.Logical.Latch lat1 "Stage down lag fan"; Buildings.Controls.OBC.CDL.Logical.Switch logSwi[nRelFan] "Vector of relief fan status after staging up"; Buildings.Controls.OBC.CDL.Routing.BooleanScalarReplicator booRep1( final nout=nRelFan) "Replicate boolean input"; Buildings.Controls.OBC.CDL.Logical.Switch logSwi1[nRelFan] "Vector of relief fan status after staging down"; Buildings.Controls.OBC.CDL.Routing.BooleanScalarReplicator booRep2( final nout=nRelFan) "Replicate boolean input"; Buildings.Controls.OBC.CDL.Conversions.BooleanToReal booToRea3[nRelFan] "Convert boolean to real"; Buildings.Controls.OBC.CDL.Reals.Limiter lim( final uMax=1, final uMin=relFanSpe_min) "Limit the controller output"; Buildings.Controls.OBC.CDL.Routing.RealScalarReplicator reaRep2( final nout=nRelFan) "Replicate real input"; Buildings.Controls.OBC.CDL.Reals.Multiply pro3[nRelFan] "Relief fan speed"; Buildings.Controls.OBC.CDL.Logical.Switch logSwi2[nRelFan] "Vector of relief fan status after staging up"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant dpBuiSetPoi( final k=dpBuiSet) "Building pressure setpoint"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant conOne( final k=1) "Constant one"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant con( final k=0) "Zero fan speed when it is in stage 0"; Buildings.Controls.OBC.CDL.Reals.Switch swi2 "Switch input values"; Buildings.Controls.OBC.CDL.Logical.MultiOr mulOr(nin=nRelFan) "Check if there is any relief fan enabled, but may not be running"; Buildings.Controls.OBC.CDL.Conversions.BooleanToReal booToRea4[nRelFan] "Convert boolean to real"; Buildings.Controls.OBC.CDL.Logical.Not not1 "Logical not"; Buildings.Controls.OBC.CDL.Logical.And and1 "Start timer, and reset to zero if the threshold time has passed"; Buildings.Controls.OBC.CDL.Logical.And and3 "Start timer, and reset to zero if the threshold time has passed"; Buildings.Controls.OBC.CDL.Logical.Not not2 "Logical not"; Buildings.Controls.OBC.CDL.Integers.Equal intEqu2[nRelFan] "Check if the relief fan is in level 2 alarm"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt[nRelFan]( final k=fill(2, nRelFan)) "Constant"; Buildings.Controls.OBC.CDL.Logical.Not not3[nRelFan] "Logical not"; Buildings.Controls.OBC.CDL.Logical.And and4[nRelFan] "Check if the relief fan is in level 2 alarm and it is proven off"; Buildings.Controls.OBC.CDL.Conversions.BooleanToReal booToRea5[nRelFan]( final realTrue=fill(0, nRelFan), final realFalse=fill(1, nRelFan)) "Convert boolean to real"; Buildings.Controls.OBC.CDL.Reals.Multiply mul[nRelFan] "Product of inputs"; Buildings.Controls.OBC.CDL.Reals.GreaterThreshold greThr3[nRelFan]( final t=fill(0.5, nRelFan)) "Check if the relief fan is enabled"; Buildings.Controls.OBC.CDL.Logical.MultiAnd mulAnd1( final nin=nRelFan) "Check if all the fans are proven off"; Buildings.Controls.OBC.CDL.Reals.Switch swi3[nRelFan] "Switch input values"; Buildings.Controls.OBC.CDL.Routing.BooleanScalarReplicator booRep4( final nout=nRelFan) "Replicate boolean input"; Buildings.Controls.OBC.CDL.Logical.Switch logSwi3[nRelFan] "Vector of relief fan status after staging down"; Buildings.Controls.OBC.CDL.Logical.TrueDelay truDel[nRelFan]( final delayTime=fill(2, nRelFan)) "Delay true input"; Buildings.Controls.OBC.CDL.Logical.MultiOr mulOr1( final nin=nRelFan) "Check if there is any fan is proven on"; Buildings.Controls.OBC.CDL.Routing.BooleanScalarReplicator booRep5( final nout=nRelFan) "Replicate boolean input"; Buildings.Controls.OBC.CDL.Logical.Not not5[nRelFan] "Logical not"; Buildings.Controls.OBC.CDL.Logical.Not not6[nRelFan] "Logical not"; Buildings.Controls.OBC.CDL.Logical.TrueDelay truDel1[nRelFan]( final delayTime=fill(2, nRelFan)) "Delay true input"; equation connect(u1SupFan, booToRea.u); connect(enaRel.u, booToRea.y); connect(enaRel.y, gai.u); connect(dpBui, movMea.u); connect(conOne.y, conP.u_s); connect(movMea.y, div1.u1); connect(dpBuiSetPoi.y, div1.u2); connect(div1.y, conP.u_m); connect(u1SupFan, enaRelGro.u); connect(booToRea1.y, pro.u1); connect(enaRelGro.y, booToRea1.u); connect(conP.y, greThr.u); connect(enaRelGro.y, and2.u2); connect(greThr.y, and2.u1); connect(and2.y, lat.u); connect(conP.y, lesThr.u); connect(lesThr.y, tim.u); connect(tim.passed, lat.clr); connect(lat.y, booRep.u); connect(gai.y, greThr1.u); connect(greThr1.y, enaDam.u1); connect(booRep.y, enaDam.u2); connect(u1RelFan, booToRea2.u); connect(enaRel.y, sub2.u1); connect(booToRea2.y, sub2.u2); connect(gai.y, pro1.u1); connect(sub2.y, pro1.u2); connect(mulMin.y, reaRep.u); connect(lesThr1.y, swi.u2); connect(pro1.y, swi.u3); connect(pro1.y, addPar.u); connect(addPar.y, swi.u1); connect(gai.y, sub1.u1); connect(reaRep.y, sub1.u2); connect(sub1.y, abs1.u); connect(abs1.y, lesThr2.u); connect(lesThr2.y, or2.u1); connect(booToRea2.y, pro2.u2); connect(gai.y, pro2.u1); connect(pro2.y, addPar1.u); connect(pro2.y, lesThr4.u); connect(lesThr4.y, swi1.u2); connect(addPar1.y, swi1.u1); connect(pro2.y, swi1.u3); connect(swi1.y, mulMin1.u); connect(mulMin1.y, reaRep1.u); connect(reaRep1.y, sub3.u2); connect(gai.y, sub3.u1); connect(sub3.y, abs2.u); connect(abs2.y, lesThr5.u); connect(lesThr5.y, xor.u1); connect(booToInt.y, intEqu.u1); connect(booToInt1.y, intEqu.u2); connect(intEqu.y, mulAnd.u); connect(booToInt1.y, intEqu1.u1); connect(booToInt2.y, intEqu1.u2); connect(intEqu1.y, mulAnd2.u); connect(lat2.y, booRep1.u); connect(lat1.y, booRep2.u); connect(booRep2.y, logSwi1.u2); connect(mulAnd2.y, lat1.clr); connect(conP.y, lesThr3.u); connect(xor.y, logSwi1.u1); connect(conP.y, greThr2.u); connect(booRep1.y, logSwi.u2); connect(or2.y, logSwi.u1); connect(u1RelFan, xor.u2); connect(u1RelFan, logSwi1.u3); connect(u1RelFan, booToInt1.u); connect(u1RelFan, or2.u2); connect(logSwi.y, booToRea3.u); connect(conP.y, lim.u); connect(lim.y, pro.u2); connect(booToRea3.y, pro3.u2); connect(pro3.y, yRelFan); connect(reaRep2.y, pro3.u1); connect(con.y, swi2.u3); connect(mulOr.y, swi2.u2); connect(movMea.y, yDpBui); connect(logSwi2.y, booToRea4.u); connect(not1.y, pre.u); connect(and1.y, upTim.u); connect(greThr2.y, and1.u1); connect(not2.y, pre1.u); connect(lesThr3.y, and3.u1); connect(and3.y, dowTim.u); connect(uRelFanAla, intEqu2.u1); connect(conInt.y, intEqu2.u2); connect(u1RelFan, not3.u); connect(intEqu2.y, and4.u1); connect(not3.y, and4.u2); connect(and4.y, booToRea5.u); connect(booToRea4.y, mul.u1); connect(booToRea5.y, mul.u2); connect(mul.y, yDam); connect(enaDam.y, logSwi2.u3); connect(logSwi.y, logSwi2.u1); connect(upTim.passed, not1.u); connect(upTim.passed, lat2.u); connect(dowTim.passed, not2.u); connect(dowTim.passed, lat1.u); connect(enaRel.y, greThr3.u); connect(greThr3.y, mulOr.u); connect(pro.y, swi2.u1); connect(swi2.y, reaRep2.u); connect(pro1.y, lesThr1.u); connect(not3.y, mulAnd1.u); connect(mulAnd1.y, booRep4.u); connect(booRep4.y, swi3.u2); connect(pro1.y, swi3.u1); connect(swi.y, swi3.u3); connect(swi3.y, mulMin.u); connect(pre1.y, and3.u2); connect(u1RelFan, logSwi3.u1); connect(booRep4.y, logSwi3.u2); connect(logSwi1.y, logSwi3.u3); connect(logSwi3.y, logSwi.u3); connect(pre.y, and1.u2); connect(truDel.y, booToInt.u); connect(or2.y, truDel.u); connect(mulAnd.y, lat2.clr); connect(logSwi.y, mulOr1.u); connect(mulOr1.y, booRep5.u); connect(booRep5.y, logSwi2.u2); connect(not6.y, booToInt2.u); connect(truDel1.y, not6.u); connect(not5.y, truDel1.u); connect(xor.y, not5.u); end ReliefFanGroup;

block ReturnFanAirflowTracking "Return fan control for AHUs using return fan with airflow tracking" parameter Real difFloSet( final unit="m3/s", final quantity="VolumeFlowRate") "Airflow differential between supply air and return air fans required to maintain building pressure at desired pressure"; parameter Buildings.Controls.OBC.CDL.Types.SimpleController conTyp= Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller"; parameter Real k(final unit="1") = 1 "Gain, normalized using dpBuiSet"; parameter Real Ti( final unit="s", final quantity="Time")=0.5 "Time constant of integrator block"; parameter Real Td( final unit="s", final quantity="Time")=0.1 "Time constant of derivative block"; parameter Real maxSpe=1 "Upper limit of output"; parameter Real minSpe=0 "Lower limit of output"; Buildings.Controls.OBC.CDL.Interfaces.RealInput VAirSup_flow( final unit="m3/s", final min=0, final quantity="VolumeFlowRate") "Measured AHU supply airflow rate"; Buildings.Controls.OBC.CDL.Interfaces.RealInput VAirRet_flow( final unit="m3/s", final min=0, final quantity="VolumeFlowRate") "Measured AHU return airflow rate"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1SupFan "Supply fan status"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRetFan( final unit="1", final min=0, final max=1) "Return fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput y1RetFan "Return fan commanded on"; Buildings.Controls.OBC.CDL.Reals.PID conP( final controllerType=conTyp, final k=k, final Ti=Ti, final Td=Td, final yMax=maxSpe, final yMin=minSpe) "Building static pressure controller"; protected Buildings.Controls.OBC.CDL.Reals.Switch swi "Check if relief damper should be enabled"; Buildings.Controls.OBC.CDL.Reals.Subtract conErr( u1(final unit="m3/s", displayUnit="m3/s"), u2(final unit="m3/s", displayUnit="m3/s"), y(final unit="m3/s", displayUnit="m3/s")) "Control error"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant zerSpe( final k=0) "Disable return fan"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant difFlo( final k=difFloSet) "Return airflow less than supply airflow"; equation connect(u1SupFan, swi.u2); connect(zerSpe.y, swi.u3); connect(swi.y,yRetFan); connect(VAirSup_flow, conErr.u1); connect(difFlo.y, conErr.u2); connect(conErr.y, conP.u_s); connect(VAirRet_flow, conP.u_m); connect(conP.y, swi.u1); connect(u1SupFan, y1RetFan); end ReturnFanAirflowTracking;

block ReturnFanDirectPressure "Return fan control with direct building pressure control" parameter Real dpBuiSet( final unit="Pa", final quantity="PressureDifference", final max=30) = 12 "Building static pressure difference relative to ambient (positive to pressurize the building)"; parameter Real p_rel_RetFan_min( final unit="Pa", final quantity="PressureDifference", final min=0, final max=1000) = 2.4 "Return fan discharge static pressure difference minimum setpoint,no less than 2.4 Pa"; parameter Real p_rel_RetFan_max( final unit="Pa", final quantity="PressureDifference", final min=0, final max=1000) = 40 "Return fan discharge static pressure maximum setpoint"; parameter Real disSpe_min( final unit="1", final min=0, final max=1) "Return fan speed when providing the minimum return fan discharge static pressure difference"; parameter Real disSpe_max( final unit="1", final min=0, final max=1) "Return fan speed when providing the maximum return fan discharge static pressure difference"; parameter Buildings.Controls.OBC.CDL.Types.SimpleController conTyp= Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller"; parameter Real k(final unit="1") = 1 "Gain, normalized using dpBuiSet"; parameter Real Ti( final unit="s", final quantity="Time")=0.5 "Time constant of integrator block"; parameter Real Td( final unit="s", final quantity="Time")=0.1 "Time constant of derivative block"; Buildings.Controls.OBC.CDL.Interfaces.RealInput dpBui( final unit="Pa", displayUnit="Pa") "Building static pressure difference, relative to ambient (positive if pressurized)"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1MinOutAirDam "Minimum outdoor air damper status, true when it is open"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1SupFan "Supply fan status"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yDpBui( final unit="Pa", displayUnit="Pa") "Averaged building static pressure"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRelDam( final unit="1", final min=0, final max=1) "Relief damper commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput dpDisSet( final unit="Pa", displayUnit="Pa", final min=0) "Return fan discharge static pressure setpoint"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yRetFan( final unit="1", final min=0, final max=1) "Return fan commanded speed"; Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput y1RetFan "Return fan commanded on"; Buildings.Controls.OBC.CDL.Reals.MovingAverage movMea( final delta=300) "Average building static pressure measurement"; Buildings.Controls.OBC.CDL.Reals.PID conP( final controllerType=conTyp, final k=k, final Ti=Ti, final Td=Td) "Building static pressure controller"; Buildings.Controls.OBC.CDL.Reals.Line linExhAirDam "Exhaust air damper position"; Buildings.Controls.OBC.CDL.Reals.Line linRetFanStaPre "Return fan static pressure setpoint"; Buildings.Controls.OBC.CDL.Reals.Switch swi1 "Relief air damper position"; Buildings.Controls.OBC.CDL.Reals.Switch swi "Return fan discharge static pressure setpoint"; Buildings.Controls.OBC.CDL.Reals.Divide div "Normalized the control error"; Buildings.Controls.OBC.CDL.Reals.Line linRetFanSpe "Return fan speed"; Buildings.Controls.OBC.CDL.Reals.Switch swi2 "Return fan speed setpoint"; protected Buildings.Controls.OBC.CDL.Reals.Sources.Constant dpBuiSetPoi( final k=dpBuiSet) "Building pressure setpoint"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant retFanDisPreMin( final k=p_rel_RetFan_min) "Return fan discharge static pressure minimum setpoint"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant retFanDisPreMax( final k=p_rel_RetFan_max) "Return fan discharge static pressure maximum setpoint"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant zer(final k=0) "Zero fan control signal"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant zer1(final k=0) "Zero constant"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant con(final k=0.5) "Constant 0.5"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant one(final k=1) "Constant one"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant conOne(final k=1) "Constant one"; Buildings.Controls.OBC.CDL.Logical.And enaDam "Check if the relief damper should be enabled"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant retFanSpeMin( final k=disSpe_min) "Return fan speed when discharge static pressure minimum setpoint"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant retFanSpeMax( final k=disSpe_max) "Return fan speed when discharge static pressure maximum setpoint"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant zer2( final k=0) "Zero fan control signal"; equation connect(movMea.u, dpBui); connect(swi.u2, u1SupFan); connect(swi.u3, zer.y); connect(zer1.y, linExhAirDam.x1); connect(zer1.y, linExhAirDam.f1); connect(con.y, linExhAirDam.x2); connect(one.y, linExhAirDam.f2); connect(con.y, linRetFanStaPre.x1); connect(one.y, linRetFanStaPre.x2); connect(retFanDisPreMin.y, linRetFanStaPre.f1); connect(retFanDisPreMax.y, linRetFanStaPre.f2); connect(linRetFanStaPre.y, swi.u1); connect(linExhAirDam.y, swi1.u1); connect(swi1.y,yRelDam); connect(zer1.y, swi1.u3); connect(swi.y, dpDisSet); connect(conP.y, linExhAirDam.u); connect(conP.y, linRetFanStaPre.u); connect(dpBuiSetPoi.y, div.u2); connect(movMea.y, div.u1); connect(conOne.y, conP.u_s); connect(div.y, conP.u_m); connect(movMea.y, yDpBui); connect(u1MinOutAirDam, enaDam.u1); connect(u1SupFan, enaDam.u2); connect(enaDam.y, swi1.u2); connect(linRetFanStaPre.y, linRetFanSpe.u); connect(retFanDisPreMin.y, linRetFanSpe.x1); connect(retFanSpeMin.y, linRetFanSpe.f1); connect(retFanDisPreMax.y, linRetFanSpe.x2); connect(retFanSpeMax.y, linRetFanSpe.f2); connect(linRetFanSpe.y, swi2.u1); connect(zer2.y, swi2.u3); connect(u1SupFan, swi2.u2); connect(swi2.y, yRetFan); connect(u1SupFan, y1RetFan); end ReturnFanDirectPressure;

block SupplyFan "Block to control multi zone VAV AHU supply fan" parameter Boolean have_perZonRehBox = false "Check if there is any VAV-reheat boxes on perimeter zones"; parameter Real iniSet( final unit="Pa", final quantity="PressureDifference") = 120 "Initial setpoint"; parameter Real minSet( final unit="Pa", final quantity="PressureDifference") = 25 "Minimum setpoint"; parameter Real maxSet( final unit="Pa", final quantity="PressureDifference") "Duct design maximum static pressure. It is the Max_DSP shown in Section 3.2.1.1 of Guideline 36"; parameter Real delTim( final unit="s", final quantity="Time")= 600 "Delay time after which trim and respond is activated"; parameter Real samplePeriod( final unit="s", final quantity="Time") = 120 "Sample period"; parameter Integer numIgnReq = 2 "Number of ignored requests"; parameter Real triAmo( final unit="Pa", final quantity="PressureDifference") = -12.0 "Trim amount"; parameter Real resAmo( final unit="Pa", final quantity="PressureDifference") = 15 "Respond amount (must be opposite in to triAmo)"; parameter Real maxRes( final unit="Pa", final quantity="PressureDifference") = 32 "Maximum response per time interval (same sign as resAmo)"; parameter Buildings.Controls.OBC.CDL.Types.SimpleController controllerType=Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller"; parameter Real k(final unit="1")=0.1 "Gain of controller, normalized using maxSet"; parameter Real Ti( final unit="s", final quantity="Time", min=0)=60 "Time constant of integrator block"; parameter Real Td( final unit="s", final quantity="Time", final min=0) = 0.1 "Time constant of derivative block"; parameter Real maxSpe(min=0.1, max=1, unit="1") = 1 "Maximum allowed fan speed"; parameter Real minSpe(min=0.1, max=1, unit="1") = 0.1 "Lowest allowed fan speed if fan is on"; parameter Real iniSpe(min=minSpe, max=1, unit="1") = 0.1 "Initial speed when fan is enabled. It has to be greater than the lowest allowed speed"; Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uOpeMod "System operation mode"; Buildings.Controls.OBC.CDL.Interfaces.RealInput dpDuc( final unit="Pa", final quantity="PressureDifference") "Measured duct static pressure"; Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uZonPreResReq "Zone static pressure reset requests"; Buildings.Controls.OBC.CDL.Interfaces.BooleanOutput y1SupFan "Supply fan command on"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput ySupFan( min=0, max=1, final unit="1") "Supply fan commanded speed"; Buildings.Controls.OBC.ASHRAE.G36.Generic.TrimAndRespond staPreSetRes( final iniSet=iniSet, final minSet=minSet, final maxSet=maxSet, final delTim=delTim, final samplePeriod=samplePeriod, final numIgnReq=numIgnReq, final triAmo=triAmo, final resAmo=resAmo, final maxRes=maxRes) "Static pressure setpoint reset using trim and respond logic"; Buildings.Controls.OBC.CDL.Reals.PIDWithReset conSpe( final controllerType=controllerType, final k=k, final Ti=Ti, final Td=Td, final yMax=maxSpe, final yMin=minSpe, final y_reset=iniSpe) "Supply fan speed control"; protected Buildings.Controls.OBC.CDL.Reals.Sources.Constant zerSpe(k=0) "Zero fan speed when it becomes OFF"; Buildings.Controls.OBC.CDL.Reals.Switch swi "If fan is OFF, fan speed outputs to zero"; Buildings.Controls.OBC.CDL.Logical.Or or1 "Check whether supply fan should be ON"; Buildings.Controls.OBC.CDL.Logical.Or or2 if have_perZonRehBox "Setback or warmup mode"; Buildings.Controls.OBC.CDL.Logical.Or3 or3 "Cool-down or setup or occupied mode"; Buildings.Controls.OBC.CDL.Logical.Sources.Constant con( k=false) if not have_perZonRehBox "Constant true"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt( k=Buildings.Controls.OBC.ASHRAE.G36.Types.OperationModes.coolDown) "Cool down mode"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt4( k=Buildings.Controls.OBC.ASHRAE.G36.Types.OperationModes.warmUp) "Warm-up mode"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt1( k=Buildings.Controls.OBC.ASHRAE.G36.Types.OperationModes.setUp) "Set up mode"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt2( k=Buildings.Controls.OBC.ASHRAE.G36.Types.OperationModes.occupied) "Occupied mode"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant conInt3( k=Buildings.Controls.OBC.ASHRAE.G36.Types.OperationModes.setBack) "Set back mode"; Buildings.Controls.OBC.CDL.Integers.Equal intEqu "Check if current operation mode is cool-down mode"; Buildings.Controls.OBC.CDL.Integers.Equal intEqu1 "Check if current operation mode is setup mode"; Buildings.Controls.OBC.CDL.Integers.Equal intEqu2 "Check if current operation mode is occupied mode"; Buildings.Controls.OBC.CDL.Integers.Equal intEqu3 "Check if current operation mode is setback mode"; Buildings.Controls.OBC.CDL.Integers.Equal intEqu4 "Check if current operation mode is warmup mode"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant gaiNor( final k=maxSet) "Gain for normalization of controller input"; Buildings.Controls.OBC.CDL.Reals.Divide norPSet "Normalization for pressure set point"; Buildings.Controls.OBC.CDL.Reals.Divide norPMea "Normalization of pressure measurement"; Buildings.Controls.OBC.CDL.Discrete.FirstOrderHold firOrdHol( final samplePeriod=samplePeriod) "Extrapolation through the values of the last two sampled input signals"; equation connect(or2.y, or1.u2); connect(or1.y, y1SupFan); connect(or1.y, staPreSetRes.uDevSta); connect(or1.y, swi.u2); connect(conSpe.y, swi.u1); connect(zerSpe.y, swi.u3); connect(swi.y, ySupFan); connect(uZonPreResReq, staPreSetRes.numOfReq); connect(con.y, or1.u2); connect(intEqu.y, or3.u1); connect(intEqu2.y, or3.u3); connect(intEqu1.y, or3.u2); connect(conInt.y, intEqu.u2); connect(conInt1.y, intEqu1.u2); connect(conInt2.y, intEqu2.u2); connect(conInt3.y, intEqu3.u2); connect(conInt4.y, intEqu4.u2); connect(uOpeMod, intEqu.u1); connect(uOpeMod, intEqu1.u1); connect(uOpeMod, intEqu2.u1); connect(uOpeMod, intEqu3.u1); connect(uOpeMod, intEqu4.u1); connect(or3.y, or1.u1); connect(intEqu3.y, or2.u1); connect(intEqu4.y, or2.u2); connect(norPSet.y, conSpe.u_s); connect(norPMea.y, conSpe.u_m); connect(staPreSetRes.y, firOrdHol.u); connect(conSpe.trigger, or1.y); connect(gaiNor.y, norPSet.u2); connect(dpDuc, norPMea.u1); connect(gaiNor.y, norPMea.u2); connect(firOrdHol.y, norPSet.u1); end SupplyFan;

block SupplySignals "Multizone VAV AHU supply air temperature control loop and coil valves position" parameter Boolean have_heaCoi=true "True: the AHU has heating coil. It could be the hot water coil, or the electric heating coil"; parameter Buildings.Controls.OBC.CDL.Types.SimpleController controllerType= Buildings.Controls.OBC.CDL.Types.SimpleController.PI "Type of controller for supply air temperature signal"; parameter Real kTSup(final unit="1/K")=0.05 "Gain of controller for supply air temperature signal"; parameter Real TiTSup( final unit="s", final quantity="Time")=600 "Time constant of integrator block for supply temperature control signal"; parameter Real TdTSup( final unit="s", final quantity="Time")=0.1 "Time constant of derivative block for supply temperature control signal"; parameter Real uHea_max( final min=-0.9, final unit="1")=-0.25 "Upper limit of controller signal when heating coil is off. Require -1 < uHea_max < uCoo_min < 1."; parameter Real uCoo_min( final max=0.9, final unit="1")=0.25 "Lower limit of controller signal when cooling coil is off. Require -1 < uHea_max < uCoo_min < 1."; Buildings.Controls.OBC.CDL.Interfaces.RealInput TAirSup( final unit="K", final displayUnit="degC", final quantity="ThermodynamicTemperature") "Measured supply air temperature"; Buildings.Controls.OBC.CDL.Interfaces.RealInput TAirSupSet( final unit="K", final displayUnit="degC", final quantity="ThermodynamicTemperature") "Supply air temperature setpoint"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1SupFan "Supply fan status"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yHeaCoi( final min=0, final max=1, final unit="1") if have_heaCoi "Heating coil commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput yCooCoi( final min=0, final max=1, final unit="1") "Cooling coil commanded position"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput uTSup( final max=1, final unit="1", final min=-1) "Supply temperature control signal"; Buildings.Controls.OBC.CDL.Reals.PIDWithReset conTSup( final controllerType=controllerType, final k=kTSup, final Ti=TiTSup, final Td=TdTSup, final yMax=1, final yMin=-1, final reverseActing=false, final y_reset=0) "Controller for supply air temperature control signal (to be used by heating coil, cooling coil and economizer)"; protected Buildings.Controls.OBC.CDL.Reals.Switch swi "Switch to select supply temperature control signal based on status of supply fan"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant uHeaMaxCon( final k=uHea_max) if have_heaCoi "Constant signal to map control action"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant negOne(final k=-1) if have_heaCoi "Negative unity signal"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant uCooMinCon( final k=uCoo_min) "Constant signal to map control action"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant zer(final k=0) "Zero control signal"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant one(final k=1) "Unity signal"; Buildings.Controls.OBC.CDL.Reals.Line conSigCoo( final limitBelow=true, final limitAbove=false) "Cooling control signal"; Buildings.Controls.OBC.CDL.Reals.Line conSigHea( final limitBelow=false, final limitAbove=true) if have_heaCoi "Heating control signal"; equation connect(zer.y,swi. u3); connect(TAirSup, conTSup.u_m); connect(negOne.y,conSigHea. x1); connect(one.y,conSigHea. f1); connect(swi.y,conSigHea. u); connect(swi.y,conSigCoo. u); connect(uHeaMaxCon.y,conSigHea. x2); connect(zer.y,conSigHea. f2); connect(uCooMinCon.y,conSigCoo. x1); connect(zer.y,conSigCoo. f1); connect(one.y,conSigCoo. x2); connect(one.y,conSigCoo. f2); connect(conSigHea.y, yHeaCoi); connect(conSigCoo.y, yCooCoi); connect(swi.y,uTSup); connect(TAirSupSet, conTSup.u_s); connect(u1SupFan, swi.u2); connect(conTSup.y, swi.u1); connect(u1SupFan, conTSup.trigger); end SupplySignals;

block SupplyTemperature "Supply air temperature setpoint for multi zone system" parameter Real TSupCoo_min( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature")=285.15 "Lowest cooling supply air temperature setpoint when the outdoor air temperature is at the higher value of the reset range and above"; parameter Real TSupCoo_max( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature")=291.15 "Highest cooling supply air temperature setpoint. It is typically 18 degC (65 degF) in mild and dry climates, 16 degC (60 degF) or lower in humid climates"; parameter Real TOut_min( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature")=289.15 "Lower value of the outdoor air temperature reset range. Typically value is 16 degC (60 degF)"; parameter Real TOut_max( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature")=294.15 "Higher value of the outdoor air temperature reset range. Typically value is 21 degC (70 degF)"; parameter Real TSupWarUpSetBac( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature")=308.15 "Supply temperature in warm up and set back mode"; parameter Real delTim( final unit="s", final quantity="Time") = 600 "Delay timer"; parameter Real samplePeriod( final unit="s", final quantity="Time", final min=1E-3) = 120 "Sample period of component"; parameter Integer numIgnReq = 2 "Number of ignorable requests for TrimResponse logic"; parameter Real triAmo( final unit="K", displayUnit="K", final quantity="TemperatureDifference") = 0.1 "Trim amount"; parameter Real resAmo( final unit="K", displayUnit="K", final quantity="TemperatureDifference") = -0.2 "Response amount"; parameter Real maxRes( final unit="K", displayUnit="K", final quantity="TemperatureDifference") = -0.6 "Maximum response per time interval"; Buildings.Controls.OBC.CDL.Interfaces.RealInput TOut( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature") "Outdoor air temperature"; Buildings.Controls.OBC.CDL.Interfaces.BooleanInput u1SupFan "Supply fan status"; Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uOpeMod "System operation mode"; Buildings.Controls.OBC.CDL.Interfaces.IntegerInput uZonTemResReq "Zone cooling supply air temperature reset request"; Buildings.Controls.OBC.CDL.Interfaces.RealOutput TAirSupSet( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature") "Supply air temperature setpoint"; Buildings.Controls.OBC.ASHRAE.G36.Generic.TrimAndRespond maxSupTemRes( final delTim=delTim, final iniSet=iniSet, final minSet=minSet, final maxSet=maxSet, final samplePeriod=samplePeriod, final numIgnReq=numIgnReq, final triAmo=triAmo, final resAmo=resAmo, final maxRes=maxRes) "Maximum cooling supply temperature reset"; protected parameter Real TDeaBan( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature")=273.15+26 "Default supply temperature setpoint when the AHU is disabled"; parameter Real iniSet( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature")=TSupCoo_max "Initial setpoint"; parameter Real maxSet( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature")=TSupCoo_max "Maximum setpoint"; parameter Real minSet( final unit="K", displayUnit="degC", final quantity="ThermodynamicTemperature")=TSupCoo_min "Minimum setpoint"; Buildings.Controls.OBC.CDL.Reals.Line lin "Supply temperature distributes linearly between minimum and maximum supply air temperature, according to outdoor temperature"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant minOutTem( final k=TOut_min) "Lower value of the outdoor air temperature reset range"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant maxOutTem( final k=TOut_max) "Higher value of the outdoor air temperature reset range"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant minSupTem( final k=TSupCoo_min) "Lowest cooling supply air temperature setpoint"; Buildings.Controls.OBC.CDL.Logical.And and1 "Check if it is in Warmup or Setback mode"; Buildings.Controls.OBC.CDL.Reals.Sources.Constant supTemWarUpSetBac( final k=TSupWarUpSetBac) "Supply temperature setpoint under warm-up and setback mode"; Buildings.Controls.OBC.CDL.Reals.Switch swi1 "If operation mode is warm-up or setback modes, setpoint shall be 35 degC"; Buildings.Controls.OBC.CDL.Reals.Switch swi2 "If operation mode is setup or cool-down, setpoint shall be the lowest cooling supply setpoint"; Buildings.Controls.OBC.CDL.Reals.Switch swi3 "Check output regarding supply fan status"; Buildings.Controls.OBC.CDL.Integers.Sources.Constant cooDowMod( final k=3) "Cooldown mode index"; Buildings.Controls.OBC.CDL.Integers.LessThreshold intLesThr1( final t=6) "Check if operation mode index is less than 6 (freeze protection mode)"; Buildings.Controls.OBC.CDL.Integers.GreaterThreshold intGreThr1( final t=3) "Check if operation mode index is greater than 3 (setup mode)"; Buildings.Controls.OBC.CDL.Integers.LessThreshold intLesThr2( final t=3) "Check if operation mode index is less than 3 (setup mode)"; Buildings.Controls.OBC.CDL.Integers.GreaterThreshold intGreThr2( final t=0) "Check if operation mode index is greater than 0 (unoccupied mode)"; Buildings.Controls.OBC.CDL.Logical.And and2 "Check if it is in occupied or setup mode"; Buildings.Controls.OBC.CDL.Reals.Switch swi4 "If operation mode is occupied or setup ,mode, setpoint shall be reset"; Buildings.Controls.OBC.CDL.Integers.Equal intEqu "Check if it is in cooldown mode"; CDL.Reals.Sources.Constant TDea(final k=TDeaBan) "Deadband supply temperature setpoint"; equation connect(minOutTem.y, lin.x1); connect(TOut, lin.u); connect(maxOutTem.y, lin.x2); connect(minSupTem.y, lin.f2); connect(and1.y, swi1.u2); connect(supTemWarUpSetBac.y, swi1.u1); connect(minSupTem.y, swi2.u1); connect(swi2.y, swi1.u3); connect(u1SupFan, swi3.u2); connect(swi1.y, swi3.u1); connect(intLesThr1.y, and1.u1); connect(intGreThr1.y, and1.u2); connect(uOpeMod, intLesThr1.u); connect(uOpeMod, intGreThr1.u); connect(uZonTemResReq, maxSupTemRes.numOfReq); connect(u1SupFan, maxSupTemRes.uDevSta); connect(maxSupTemRes.y, lin.f1); connect(swi3.y, TAirSupSet); connect(cooDowMod.y, intEqu.u2); connect(uOpeMod, intEqu.u1); connect(intEqu.y, swi2.u2); connect(uOpeMod, intLesThr2.u); connect(uOpeMod, intGreThr2.u); connect(intLesThr2.y, and2.u1); connect(intGreThr2.y, and2.u2); connect(and2.y, swi4.u2); connect(lin.y, swi4.u1); connect(swi4.y, swi2.u3); connect(TDea.y, swi4.u3); connect(TDea.y, swi3.u3); end SupplyTemperature;