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Modular chiller / water-to-water heat pump controller · BACnet points list

WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers BACnet points list

Updated 11 November 2026

Short answer

BACnet objects of the Aurora HydroLink2 controller used on TruClimate 100 dual scroll and TruClimate 500 modular water-to-water chillers. It covers system enable and emergency shutdown, aquastat, setpoint or network control of the compressors, variable speed capacity control, load and source water temperatures and limits, per-compressor refrigerant data, and header rack valve and loop control. Each row is ticked for the configurations it applies to.

This page lists 302 BACnet objects for the WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers — 170 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from WaterFurnace’s own free documentation, linked below.

Manufacturer
WaterFurnace
Model
Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers
Equipment
Modular chiller / water-to-water heat pump controller
Equipment type
Chillers
BACnet objects
302 (170 writable)
Transport
—
Firmware
HydroLink2 BACnet objects version 3.04
Also known as
HydroLink2, HydroLink 2, TruClimate 100, TruClimate 500, NXW, HydroLink2 BACnet Objects 3.04
Source document
HydroLink2 BACnet Objects · rev. Version 3.04
Download CSV 302 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

Reference only, provided as-is: verify against WaterFurnace’s current documentation and the live device before use. Not official WaterFurnace information. Terms of use.

BMS integration notes: WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers

Integration in brief

For units without a header rack, choose aquastat, setpoint, network or setpoint-with-enable control on MSV 2. In setpoint mode the controller holds AV 22/23 against the input picked on MSV 3; in network mode the BAS calls compressor A on BV 35 and B on BV 34, and variable speed systems can take capacity targets on AV 306/307 when BV 301/302 are enabled. Keep BV 37 Enabled and set BV 36 to Network while the BAS has control.

Minimum points to map

The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.

ObjectNameWhyAccess
BV 37SystemEnable_cSystem enable; compressors stay off when DisabledCommand
BV 36NetworkControl_cSet to Network while the BAS has controlCommand
BV 2EmShutdown_cNetwork emergency shutdownCommand
BV 1Mode_cCool or heat (non-header-rack units)Command
AV 22CoolingSetpoint_cCooling setpoint, setpoint control modeCommand
AV 23HeatingSetpoint_cHeating setpoint, setpoint control modeCommand
BV 33AlarmReset_cAlarm reset; return to Normal after the lockout clearsCommand
MV 1UnitMode_stCurrent operating modeRead
AV 1ControlTemp_stControl temperature (input chosen on MSV 3)Read
MV 0SystemStatus_stOverall status: normal, alarm, shutdown, load shed...Read

Enable & remote start

BV 37 SystemEnable_c (default Enabled) must be Enabled for the compressors to run. The BAS sets BV 36 NetworkControl_c to Network when it takes control. With MSV 2 = 3 (Network), BV 35 and BV 34 call compressors A and B and BV 1 picks cool or heat. BV 2 EmShutdown_c forces an emergency shutdown.

Sensors & values from the BMS

AV 62 NetworkTemperature_c is the BAS-supplied control temperature for setpoint control on a network temperature (MSV 3 option 4). Header rack builds take BAS cold and hot water temperatures on AV 506/507 (MSV 502/503 option 4) and network loop temperatures on AV 508 and AV 510-515.

Watch out for

WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers BACnet objects

Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.

302 of 302 shown
Type
AnalogBinaryMulti-state
Access
Show
WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers BACnet Points List
DescriptionStates
AV0ActiveTempSetpt_stActive setpoint value for control logic°FRead
AVmin1ControlTemp_stSelected temperature value for setpoint control°FRead
AV2AXBA_HotWaterTemp_stHWT temperature input on AXB-A°FRead
AV3CompACurrentT1_stCompressor A T1 currentARead
AV4CompACurrentT2_stCompressor A T2 currentARead
AV5CompADischPressure_stCompressor A discharge pressurepsigRead
AV6CompASuctPressure_stCompressor A suction pressurepsigRead
AV7SourceWaterFlow_stSource heat exchanger water flow rategal/minRead
AV8SrcLvgWaterTemp_stSource heat exchanger leaving water temperature°FRead
AV9SrcEntWaterTemp_stSource heat exchanger entering water temperature°FRead
AV10AXBA_LvgAirTempInput_stLvg Air temperature input on AXB-A°FRead
AV11CompASuctLineTemp_stCompressor A suction line temperature°FRead
AV12RemoteTempInput_stHWT temperature input on AXB-B°FRead
AV13CompBCurrentT1_stCompressor B T1 currentARead
AV14CompBCurrentT2_stCompressor B T2 currentARead
AV15CompBDischPressure_stCompressor B discharge pressurepsigRead
AV16CompBSuctPressure_stCompressor B suction pressurepsigRead
AV17LoadWaterFlow_stLoad heat exchanger water flow rategal/minRead
AV18LoadLvgWaterTemp_stLoad heat exchanger leaving water temperature°FRead
AV19LoadEntWaterTemp_stLoad heat exchanger entering water temperature°FRead
AV20AXBB_LvgAirTemp_stLvg Air temperature input on AXB-B°FRead
AV21CompBSuctLineTemp_stCompressor B suction line temperature°FRead
AVmin22CoolingSetpoint_cCooling set point used for set point control mode (default 50°F)°FCommand
AVmin23HeatingSetpoint_cHeating set point used for set point control mode (default 80°F)°FCommand
AV24PIDExecuteTime_cPID execution time used for set point control mode (default 15 sec)secCommand
AV25CoolingDifferential_cCooling differential used for set point control mode (default 2.5 Δ°F)Δ°FCommand
AV26HeatingDifferential_cHeating differential used for set point control mode (default Δ°F)Δ°FCommand
AV27DervConst_cPID Derivative used for set point control mode (default 0)Command
AV28PropConst_cPID Proportional constant used for set point control mode (default 8)Command
AV29IntConst_cPID Integral constant used for set point control mode (default 0.2)Command
AV30RemoteTempSensorOffset_cCalibration offset for the remote temperature sensor (default 0 Δ°F)Δ°FCommand
AV31LoadLvgWaterHighTempFaultLimit_cLoad leaving high water temperature fault limit (default 200°F)°FCommand
AV32LoadEntWaterCalib_cCalibration offset for the entering load water temperature sensor (default 0 Δ°F)Δ°FCommand
AV33LoadEntWaterLowTempFaultLimit_cLoad entering low water temperature fault limit (default 0°F)°FCommand
AV34LoadEntWaterHighTempFaultLimit_cLoad entering high water temperature fault limit (default 200°F)°FCommand
AV35LoadLeavingWaterCalib_cCalibration offset for the leaving load water temperature sensor (default 0 Δ°F)Δ°FCommand
AV36LoadLvgWaterLowTempFaultLimit_cLoad leaving low water temperature fault limit (default 0°F)°FCommand
AV37LoadLWTLowAlarmLimit_cLoad leaving low water temperature alarm limit (default 0°F)°FCommand
AV38LoadEWTHighAlarmLimit_cLoad entering high water temperature alarm limit (default 200°F)°FCommand
AV39LoadEWTLowAlarmLimit_cLoad entering low water temperature alarm limit (default 0°F)°FCommand
AV40LoadLWTHighAlarmLimit_cLoad leaving high water temperature alarm limit (default 200°F)°FCommand
AV41SrcLvgWaterHighTempFaultLimit_cSource leaving high water temperature fault limit (default 200°F)°FCommand
AV42SrcEntWaterCalib_cCalibration offset for the entering source water temperature sensor (default 0 Δ°F)Δ°FCommand
AV43SrcEntWaterLowTempFaultLimit_cSource entering low water temperature fault limit (default 0°F)°FCommand
AV44SrcEntWaterHighTempFaultLimit_cSource entering high water temperature fault limit (default 200°F)°FCommand
AV45SrcLeavingWaterCalib_cCalibration offset for the leaving source water temperature sensor (default 0 Δ°F)Δ°FCommand
AV46SrcLvgWaterLowTempFaultLimit_cSource leaving low water temperature fault limit (default 0°F)°FCommand
AV47SrcLWTLowAlarmLimit_cSource leaving low water temperature alarm limit (default 0°F)°FCommand
AV48SrcEWTHighAlarmLimit_cSource entering high water temperature alarm limit (default 200°F)°FCommand
AV49SrcEWTLowAlarmLimit_cSource entering low water temperature alarm limit (default 0°F)°FCommand
AV50SrcLWTHighAlarmLimit_cSource leaving high water temperature alarm limit (default 200°F)°FCommand
AV51SlowValveTimer_cDelay for water valves to open before compressor start (default 60 sec)secCommand
AV52CompPowerFactorAdjust_cAdjustment of the compressor power factor (default 0.88)Command
AV53MeasuredLineVoltageCal_cCalibrates the line voltage calculation (default 480 V)VCommand
AV54ABCBLockoutStatusAna_stMost recent fault code for compressor BRead
AV55ABCALockoutStatusAna_stMost recent fault code for compressor ARead
AV56ABCA_FP2_stCompressor A FP2 temperature value°FRead
AV57ABCA_FP1_stCompressor A FP1 temperature value°FRead
AV58ABCB_FP2_stCompressor B FP2 temperature value°FRead
AV59ABCB_FP1_stCompressor B FP1 temperature value°FRead
AV60FP2LimitOverride_cFP2 Setpoint Over-ride (default -0.1°F)°FCommand
AV61FP1LimitOverride_cFP1 Setpoint Over-ride (default -0.1°F)°FCommand
AV62NetworkTemperature_cNetwork supplied temperature value for setpoint control with network temperature°FCommand
AV63CompressorHoursA_stCompressor A operating hourshrRead
AV64SaturatedEvapTempA_stCompressor A saturated evaporator temperature°FRead
AV65SaturatedCondTempA_stCompressor A saturated condenser temperature°FRead
AV66SuperheatA_stCompressor A superheat value°FRead
AV67SubcoolingA_stCompressor A subcooling value°FRead
AV68EEVPositionA_stCompressor A EEV position%Read
AV69CompressorHoursB_stCompressor B operating hourshrRead
AV70SaturatedEvapTempB_stCompressor B saturated evaporator temperature°FRead
AV71SaturatedCondTempB_stCompressor B saturated condenser temperature°FRead
AV72SuperheatB_stCompressor B superheat value°FRead
AV73SubcoolingB_stCompressor B subcooling value°FRead
AV74EEVPositionB_stCompressor B EEV position%Read
AV75ABCBAlarmStatusAna_stNumeric Fault code of most recent fault detected by ABC BRead
AV76ABCAAlarmStatusAna_stNumeric Fault code of most recent fault detected by ABC ARead
AV77CondDiffPressure_stDifferential Pressure across condenser heat exchangerΔpsigRead
AV78EvapDiffPressure_stDifferential Pressure across evaporator heat exchangerΔpsigRead
AV79Do Not Map - FACTORY USE ONLY!!!Internal use; do not map to BASCommand
AV80AXBA_HtgLiqLineTempCompressor A Heating Liquid Line Temperature°FRead
AV81AXBB_HtgLiqLineTempCompressor B Heating Liquid Line Temperature°FRead
AV300TotalVarSpdDemand_stCurrent system operating demand for variable and fixed speed compressors%Read
AV301VarSpeedOutput_stCurrent variable speed compressor A target speed%Read
AV302CurrentCompPct_stCurrent variable speed compressor A operating percentage%Read
AV303CurrentCompRPM_stCurrent variable speed compressor A operating speedRPMRead
AV304MinCompPct_stMinimum variable speed compressor A operating percentage from drive%Read
AV305MaxCompPct_stMaximum variable speed compressor A operating percentage from drive%Read
AV306NetCapacity_cCurrent target system capacity for network capacity control of variable speed system (default 0)%Command
AV307NetVarSpdPct_cTarget capacity of VS compressor A, network control (default 0)%Command
AV308VarSpdOverride_cManual override value for variable speed compressor A capacity (default 0)%Command
AV309VSCompHours_stVariable speed compressor A operating hourshrRead
AV310VSCompCurrent_stVariable speed compressor A currentARead
AV311VSCompVoltage_stVariable speed compressor A AC voltageVRead
AV312VSCompPower_stVariable speed compressor A powerkWRead
AV313DCVoltage_stVariable speed compressor A drive voltageVRead
AV314HeatSinkTemp_stVariable speed drive A heat sink temperature°FRead
AV315CurrentCompPctB_stCurrent variable speed compressor A operating percentage%Read
AV316CurrentCompRPMB_stCurrent variable speed compressor A operating speedRPMRead
AV317MinCompPctB_stMinimum variable speed compressor A operating percentage from drive%Read
AV318MaxCompPctB_stMaximum variable speed compressor A operating percentage from drive%Read
AV319NetVarSpdPctB_cTarget capacity of VS compressor B, network control (default 0)%Command
AV321VSCompHoursB_stVariable speed compressor B operating hourshrRead
AV324VSCompPowerB_stVariable speed compressor B powerkWRead
AV325DCVoltageB_stVariable speed compressor B drive voltageVRead
AV327CompAMinPct_cMinimum compressor A operating capacity setting (default 0.25)%Command
AV328CompAMaxPct_cMaximum compressor A operating capacity setting (default 1)%Command
AV329CompBMinPct_cMinimum compressor B operating capacity setting (default 0.25)%Command
AV330CompBMaxPct_cMaximum compressor B operating capacity setting (default 1)%Command
AV331VarSpdOverrideB_cManual override value for variable speed compressor B capacity (default 0)%Command
AV332RampingStep_cRamping step size for variable capacity systems (default 0.05)%Command
AV333RampingRate_cRamping rate for variable capacity systems (default 1.0 sec)secCommand
AV334CompDownStage_cDown staging capacity limit for modular variable speed systems (default 0.75)%Command
AV335OptStageCap_cCapacity limit for sequential staging, dual VS compressors (default 0.9)%Command
AV336StagingDB_cDeadband around the staging capacity limit (default 0.05)%Command
AV337VarSpeedOutputB_stCurrent variable speed compressor B target speed%Read
AV338OptParallelStageCap_cCapacity limit for optimized parallel staging, dual VS compressors (default 0.3)%Command
AV340SourceValvePosA_stCurrent position of the isolation valve for the source heat exchanger%Read
AV341LoadValvePosA_stCurrent position of the isolation valve for the load heat exchanger%Read
AV342SourceValvePosB_stSource heat exchanger B isolation valve position%Read
AV343LoadValvePosB_stLoad heat exchanger B isolation valve position%Read
AV344SourceValveTargA_stCurrent target position of the isolation valve for the source heat exchanger%Read
AV345LoadValveTargA_stCurrent target position of the isolation valve for the load heat exchanger%Read
AV346SourceValveTargB_stSource heat exchanger B isolation valve target position%Read
AV347LoadValveTargsB_stLoad heat exchanger B isolation valve target position%Read
AV348MaxCondIsoVlvPos_cMaximum open position of the condenser isolation valve(s) (default 1)%Command
AV349MinCondIsoVlvPos_cMinimum open position of the condenser isolation valve(s) (default 0.5)%Command
AV350MaxEvapIsoVlvPos_cMaximum open position of the evaporator isolation valve(s) (default 1)%Command
AV351MinEvapIsoVlvPos_cMinimum open position of the evaporator isolation valve(s) (default 0.5)%Command
AV352CondTargDTClg_cTarget condenser Delta T for cooling mode operation (default 20 Δ°F)Δ°FCommand
AV353CondTargDTHtg_cTarget condenser Delta T for heating mode operation (default 20 Δ°F)Δ°FCommand
AV354EvapTargDTClg_cTarget evaporator Delta T for cooling mode operation (default 12 Δ°F)Δ°FCommand
AV355EvapTargDTHtg_cTarget evaporator Delta T for heating mode operation (default 12 Δ°F)Δ°FCommand
AV356CondTargDPClg_cTarget condenser Delta P for cooling mode operation (default 20 Δ°F)ΔpsigCommand
AV357CondTargDPHtg_cTarget condenser Delta P for heating mode operation (default 20 Δ°F)ΔpsigCommand
AV358EvapTargDPClg_cTarget evaporator Delta P for cooling mode operation (default 20 Δ°F)ΔpsigCommand
AV359EvapTargDPHtg_cTarget evaporator Delta P for heating mode operation (default 20 Δ°F)ΔpsigCommand
AV500ColdWaterSP_cCold water setpoint for header rack applications (default 50°F)°FCommand
AV501HotWaterSP_cHot water setpoint for header rack applications (default 80°F)°FCommand
AV502ColdDeltaOn_cOffset above cold water setpoint to start cooling (header rack) (default 3 Δ°F)Δ°FCommand
AV503ColdDeltaOff_cOffset below cold water setpoint to stop cooling (header rack) (default 3 Δ°F)Δ°FCommand
AV504HotDeltaOn_cOffset below hot water setpoint to start heating (header rack) (default 3 Δ°F)Δ°FCommand
AV505HotDeltaOff_cOffset above hot water setpoint to stop heating (header rack) (default 3 Δ°F)Δ°FCommand
AV506CW_NetworkTemp_cNetwork cold water temperature for header rack setpoint control°FCommand
AV507HW_NetworkTemp_cNetwork hot water temperature for header rack setpoint control°FCommand
AV508Geo_NetworkTemp_cNetwork supplied geothermal loop temperature for header rack applications°FCommand
AV509UnitOffsetTemp_cGlobal offset for heating and cooling demands for header rack applications (default 0°F)°FCommand
AV510NetColdInTemp_cNetwork supplied cold water in temperature value for header rack applications°FCommand
AV511NetColdOutTemp_cNetwork supplied cold water out temperature value for header rack applications°FCommand
AV512NetHotInTemp_cNetwork supplied hot water in temperature value for header rack applications°FCommand
AV513NetHotOutTemp_cNetwork supplied hot water out temperature value for header rack applications°FCommand
AV514NetGeoInTemp_cNetwork supplied geo water in temperature value for header rack applications°FCommand
AV515NetGeoOutTemp_cNetwork supplied geo water out temperature value for header rack applications°FCommand
AV516MaxHotBypass_cMaximum open position for hot loop bypass valve (default 1)%Command
AV517MaxColdBypass_cMaximum open position for cold loop bypass valve (default 1)%Command
AV518MaxGeoBypass_cMaximum open position for geo loop bypass valve (default 1)%Command
AV519BypassValveOffset_cControl valve percent closed before its bypass valve opens (default 0.3)%Command
AV520MinLoadValvePos_cMinimum position the load control valves will modulate to during operation (default 0.1)%Command
AV521MinSourceValvePos_cMinimum position the source control valves will modulate to during operation (default 0.1)%Command
AV522NetColdBypass_cCold bypass valve position under network control (BV 501 Active) (default 1)%Command
AV523NetHotBypass_cHot bypass valve position under network control (BV 501 Active) (default 1)%Command
AV524NetGeoBypass_cGeo bypass valve position under network control (BV 501 Active) (default 1)%Command
AV525Y1ActiveY2Time_cMinimum run time of 1st compressor before 2nd starts (header rack) (default 300 sec)secCommand
AV526Y2ActiveCapacity_cCalculated PID demand percentage when the 2nd compressor output may be activated (default 0.5)%Command
AV527Y2ActiveOffset_cPID demand below activation point that drops the 2nd compressor (default 0.05)%Command
AV528PropCool_cCooling PID proportional constant used for header rack applications (default 2)Command
AV529IntCool_cCooling PID integral constant used for header rack applications (default 0.3)Command
AV530DerivCool_cCooling PID derivative constant used for header rack applications (default 0.1)Command
AV531CoolExecuteTime_cCooling PID execution time used for header rack applications (default 5 sec)secCommand
AV532CoolRampTime_cCooling PID ramp time (default 15 min)minCommand
AV533PropHeat_cHeating PID proportional constant used for header rack applications (default 2)Command
AV534IntHeat_cHeating PID integral constant used for header rack applications (default 0.3)Command
AV535DerivHeat_cHeating PID derivative constant used for header rack applications (default 0.1)Command
AV536HeatExecuteTime_cHeating PID execution time used for header rack applications (default 5 sec)secCommand
AV537HeatRampTime_cHeating PID ramp time (default 15 min)minCommand
AV538LoadValveProp_cLoad valve PID proportional constant used for header rack applications (default 2)Command
AV539LoadValveInt_cLoad valve PID integral constant used for header rack applications (default 1)Command
AV540LoadValveExecute_cLoad valve PID execution time used for header rack applications (default 0.5 sec)secCommand
AV541SourceValveProp_cSource valve PID proportional constant used for header rack applications (default 2)Command
AV542SourceValveInt_cSource valve PID integral constant used for header rack applications (default 1)Command
AV543SourceValveExecute_cSource valve PID execution time used for header rack applications (default 0.5 sec)secCommand
AV544LoadInTemp_stLoad HX entering water temperature, header rack (same as AV 19)°FRead
AV545LoadOutTemp_stLoad HX leaving water temperature, header rack°FRead
AV546SourceInTemp_stSource HX entering water temperature, header rack°FRead
AV547SourceOutTemp_stSource HX leaving water temperature, header rack°FRead
AV548ColdHeaderInletTemp_stCold water loop inlet temperature measured by HydroLink controller°FRead
AV549ColdHeaderOutletTemp_stCold water loop outlet temperature measured by HydroLink controller°FRead
AV550HotHeaderInletTemp_stHot water loop inlet temperature measured by HydroLink controller°FRead
AV551HotHeaderOutletTemp_stHot water loop outlet temperature measured by HydroLink controller°FRead
AV552GeoHeaderInletTemp_stGeothermal loop water inlet temperature measured by HydroLink controller°FRead
AV553GeoHeaderOutletTemp_stGeothermal loop water outlet temperature measured by HydroLink controller°FRead
AV554ActiveColdWaterTemp_stActive cold water control temperature for header rack applications°FRead
AV555ActiveHotWaterTemp_stActive hot water control temperature for header rack applications°FRead
AV556ActiveGeoWaterTemp_stActive geothermal water temperature for header rack applications°FRead
AV557CurrentDemandPct_stCalculated PID operating demand percentage%Read
AV558Load3WayValve_stCurrent position of 3-way load control valve%Read
AV559Source3WayValve_stCurrent position of 3-way source control valve%Read
AV560ColdBypassValve_stCurrent position of cold water loop bypass valve%Read
AV561HotBypassValve_stCurrent position of hot water loop bypass valve%Read
AV562GeoBypassValve_stCurrent position of geothermal loop bypass valve%Read
AV563ManLoad3WayValvePct_cManually controlled position of 3-way load control valve (default 0)%Command
AV564ManSource3WayValvePct_cManually controlled position of 3-way source control valve (default 0)%Command
AV565ManColdBypassValvePct_cManually controlled position of cold water loop bypass valve (default 0)%Command
AV566ManHotBypassValvePct_cManually controlled position of hot water loop bypass valve (default 0)%Command
AV567ManGeoBypassValvePct_cManually controlled position of geothermal water loop bypass valve (default 0)%Command
AV568HeaderModeNum_cHeader rack operating mode selection (default 99)Command
AV569MaxLoadIsoVlvPct_cMaximum allowable opening percentage for the load side isolation valve (default 0)%Command
AV570MinLoadIsoVlvPct_cMinimum allowable opening percentage for the load side isolation valve (default 0)%Command
AV571MaxSrcIsoVlvPct_cMaximum allowable opening percentage for the source side isolation valve (default 0)%Command
AV572MinSrcIsoVlvPct_cMinimum allowable opening percentage for the source side isolation valve (default 0)%Command
MVmin0SystemStatus_stCurrent overall system statusRead1=Normal, 2=Alarm, 3=Shutdown, 4=Load Shed A, 5=Load Shed B, 6=Load Shed A & B, 7=AXB A Communication Loss, 8=AXB B Communication Loss, 9=AXB A & B Communication Loss, 10=ABC A Communication Loss, 11=ABC B Communication Loss, 12=ABC A & B Communication Loss, 13=ABC A & ABC B DIP Switch Mismatch, 14=Load Entering Water Temperature Alarm, 15=Load Leaving Water Temperature Alarm, 16=Source Entering Water Temperature Alarm, 17=Source Leaving Water Temperature Alarm
MVmin1UnitMode_stCurrent overall system operating modeRead1=Standby, 3=Single Compressor Cooling, 4=Both Compressors Cooling, 6=Single Compressor Heating, 7=Both Compressors Heating, 10=Emergency Shutdown, 11=Load Shed, 12=Lockout A, 13=Test Mode, 15=Lockout B, 18=Single Compressor w/Lockout, 19=Full Lockout, 31=Source Flow Switch Fault, 32=Load Flow Switch Fault, 33=Load & Source Flow Switch Fault
MV2TempControlMethod_cSelects temperature control method for non-header rack applications (default 1)Command1=AquaStat (uses Y1 & Y2 inputs on ABC A), 2=Setpoint (uses either AV:22 or AV:23 as setpoint), 3=Network (uses BV:34 & BV:35), 4=Setpoint w/Enable (uses either AV:22 or AV:23 as setpoint and ABC B Y2 input as enable)
MV3ControlTempInput_cSelects control temperature input for non-header rack applications (default 2)Command1=Leaving Water (AV:18 Leaving load water temp), 2=Entering Water (AV:19 Entering load water temp), 3=Remote Temp (AXB B - HWT), 4=Network Temp (AV:12)
MV4BrineFactorLoad_cAurora controls brine selection factor for load loop (default 1)Command1=Water, 2=Brine
MV5EnergyMonitorMode_cAurora controls energy monitoring modes selection (default 3)Command1=Off, 2=Compressor Monitoring, 3=Energy Monitoring
MV6BrineFactorSource_cAurora controls brine selection factor for source loop (default 1)Command1=Water, 2=Brine
MV7LoadFlowMeterSelect_cLoad loop flow meter selection (default 1)Command1=None, 2=3/4", 19mm, 3=1", 25.4mm, 4=2", 50.8mm, 5=2.5", 63.5mm, 6=1.25", 31.8mm
MV8SrcFlowMeterSelect_cSource loop flow meter selection (default 1)Command1=None, 2=3/4", 19mm, 3=1", 25.4mm, 4=2", 50.8mm, 5=2.5", 63.5mm, 6=1.25", 31.8mm
MV9ABCBLockoutStatus_stEnumerated description of most recent fault detected by ABC BRead
MV10ABCALockoutStatus_stEnumerated description of most recent fault detected by ABC ARead
MV11ABCBAlarmStatus_stEnumerated description of a currently active fault detected by ABC BRead
MV12ABCAAlarmStatus_stEnumerated description of a currently active fault detected by ABC ARead
MV300CompStaging_cDual variable speed compressor system staging option: (default 4)Command1=Standard Sequential, 2=Optimized Sequential, 3=Standard Parallel, 4=Optimized Parallel
MV500HeaderRackType_cHeader rack selection value (default 1)Command1=No header, 2=4 Pipe Standard, 3=4 Pipe Reversing, 4=6 Pipe Standard, 5=6 Pipe Dedicated Source
MV501HeaderMode_cHeader rack operating mode selection (default 8)Command1=Off with Isolation valves open, 2=Cooling only, 3=Heating only, 4=Auto full building, 5=Full building, 6=Primary cooling, 7=Primary heating, 8=System off
MV502ColdWaterSelect_cSelects cold water control temperature for header rack applications (default 1)Command1=Heat Exchanger Out, 2=Cold Water Out, 3=Cold Water In, 4=Network (AV:506)
MV503HotWaterSelect_cSelects hot water control temperature for header rack applications (default 1)Command1=Heat Exchanger Out, 2=Hot Water Out, 3=Hot Water In, 4=Network (AV:507)
BV0LeadLagEnable_cEnable compressor lead/lag (superseded by BV 42)CommandInactive=Disabled, Active=Enabled
BVmin1Mode_cSelects current operating mode for non header rack applicationsCommandInactive=Cool, Active=Heat
BVmin2EmShutdown_cEnable/disable Emergency ShutdownCommandInactive=Normal, Active=Shutdown
BV3LoadShedB_cEnable/disable Load Shed on Compressor BCommandInactive=Inactive, Active=Active
BV4LoadShedA_cEnable/disable Load Shed on Compressor ACommandInactive=Inactive, Active=Active
BV5EnableManualOverride_cEnable/disable Manual Override of Y1, Y2, O/B logic outputsCommandInactive=Disabled, Active=Enabled
BV6ABCA_Y1Override_cManual Override for Comp ACommandInactive=Off, Active=On
BV7ABCB_Y1Override_cManual Override for Comp BCommandInactive=Off, Active=On
BV8ABC_OBOverride_cManual Override for Reversing ValveCommandInactive=Cool, Active=Heat
BV9TestModeCommand_cEnable/disable the test mode of the Aurora control systemCommandInactive=Normal, Active=Test Mode
BV10PowerPhaseSelect_cSingle or three phase power for power calculationsCommandInactive=Single Phase, Active=Three Phase
BV11ABCA_HDW_ALM_stStatus of ABC A alarm outputReadInactive=Off, Active=On
BV12ABCA_HDW_Y1_stStatus of ABC A physical Y1 inputReadInactive=Off, Active=On
BV13ABCA_HDW_Y2_stStatus of ABC A physical Y2 inputReadInactive=Off, Active=On
BV14ABCA_HDW_OB_stStatus of ABC A physical O/B inputReadInactive=Off, Active=On
BV15ABCA_HDW_ES_stStatus of ABC A physical emergency shutdown inputReadInactive=Normal, Active=Shutdown
BV16ABCA_HDW_LPS_stStatus of ABC A physical low pressure switch inputReadInactive=Open, Active=Closed
BV17ABCA_HDW_HPS_stStatus of ABC A physical high pressure switch inputReadInactive=Open, Active=Closed
BV18ABCA_HDW_LS_stStatus of ABC A physical load shed inputReadInactive=Inactive, Active=Active
BV19ABCA_HDW_CC_stStatus of ABC A compressor outputReadInactive=Off, Active=On
BV20ABCA_HDW_RV_stStatus of ABC A reversing valve outputReadInactive=Off, Active=On
BV21ABCA_HDW_ACC_stStatus of ABC A accessory relay outputReadInactive=Off, Active=On
BV22ABCB_HDW_ALM_stStatus of ABC B alarm outputReadInactive=Off, Active=On
BV23ABCB_HDW_Y1_stStatus of ABC B physical Y1 inputReadInactive=Off, Active=On
BV24ABCB_HDW_Y2_stStatus of ABC B physical Y2 inputReadInactive=Off, Active=On
BV25ABCB_HDW_OB_stStatus of ABC B physical O/B inputReadInactive=Off, Active=On
BV26ABCB_HDW_ES_stStatus of ABC B physical emergency shutdown inputReadInactive=Normal, Active=Shutdown
BV27ABCB_HDW_LPS_stStatus of ABC B physical low pressure switch inputReadInactive=Open, Active=Closed
BV28ABCB_HDW_HPS_stStatus of ABC B physical high pressure switch inputReadInactive=Open, Active=Closed
BV29ABCB_HDW_LS_stStatus of ABC B physical load shed inputReadInactive=Inactive, Active=Active
BV30ABCB_HDW_CC_stStatus of ABC B compressor outputReadInactive=Off, Active=On
BV31ABCB_HDW_RV_stStatus of ABC B reversing valve outputReadInactive=Off, Active=On
BV32ABCB_HDW_ACC_stStatus of ABC B accessory relay outputReadInactive=Off, Active=On
BVmin33AlarmReset_cAlarm reset command to clear lockout conditionCommandInactive=Normal, Active=Reset
BV34NetworkY2Command_cNetwork command for compressor BCommandInactive=Off, Active=On
BV35NetworkY1Command_cNetwork command for compressor ACommandInactive=Off, Active=On
BVmin36NetworkControl_cIndication that system is under network controlCommandInactive=Normal, Active=Network
BVmin37SystemEnable_cEnables (True) or Disables (False) system operationCommandInactive=Disabled, Active=Enabled
BV38CompASourceFlowSw_stSource loop flow switch, compressor A (On = flow)ReadInactive=Off, Active=On
BV39CompALoadFlowSw_stLoad loop flow switch, compressor A (On = flow)ReadInactive=Off, Active=On
BV40CompBSourceFlowSw_stSource loop flow switch, compressor B (On = flow)ReadInactive=Off, Active=On
BV41CompBLoadFlowSw_stLoad loop flow switch, compressor B (On = flow)ReadInactive=Off, Active=On
BV42LeadLagEnable_c2Enable compressor lead/lagCommandInactive=Disabled, Active=Enabled
BV43CompAEnable_cEnables (True) or Disables (False) compressor A operationCommandInactive=Disabled, Active=Enabled
BV44CompBEnable_cEnables (True) or Disables (False) compressor B operationCommandInactive=Disabled, Active=Enabled
BV45Do Not Map - FACTORY USE ONLY!!!Internal use; do not map to BASCommandInactive=False, Active=True
BV46SystemSave_cSave AllCommandInactive=Normal, Active=Save
BV300FixedCompOutput_stStatus of fixed compressor output for variable speed combination systemReadInactive=Inactive, Active=Active
BV301NetCapacityCtrl_cLocal or network total target capacity (network uses AV 306)CommandInactive=Disabled, Active=Enabled
BV302NetVarSpdCtrl_cLocal or network VS compressor capacity (network uses AV 307)CommandInactive=Disabled, Active=Enabled
BV303NetFixedSpeed_cCurrent fixed compressor control value for network control of variable speed systemCommandInactive=Inactive, Active=Active
BV304CondHPCEnable_cEnable condenser head pressure control (envelope protection)CommandInactive=Inactive, Active=Active
BV305EvapMOPEnable_cEnable evaporator maximum pressure control (envelope protection)CommandInactive=Inactive, Active=Active
BV306CondClgDeltaEnable_cEnable delta control, condenser isolation valve, coolingCommandInactive=Inactive, Active=Active
BV307CondHtgDeltaEnable_cEnable delta control, condenser isolation valve, heatingCommandInactive=Inactive, Active=Active
BV308EvapClgDeltaEnable_cEnable delta control, evaporator isolation valve, coolingCommandInactive=Inactive, Active=Active
BV309EvapHtgDeltaEnable_cEnable delta control, evaporator isolation valve, heatingCommandInactive=Inactive, Active=Active
BV310CondClgVarSelect_cDelta control variable, condenser isolation valve, coolingCommandInactive=Temp, Active=Pressure
BV311CondHtgVarSelect_cDelta control variable, condenser isolation valve, heatingCommandInactive=Temp, Active=Pressure
BV312EvapClgVarSelect_cDelta control variable, evaporator isolation valve, coolingCommandInactive=Temp, Active=Pressure
BV313EvapHtgVarSelect_cDelta control variable, evaporator isolation valve, heatingCommandInactive=Temp, Active=Pressure
BV500SystemControl_cSetpoint or aquastat control (some header rack builds)CommandInactive=Setpoint, Active=Aquastat
BV501NetBypassCtrl_cLocal or network control of bypass valvesCommandInactive=Inactive, Active=Active
BV502HeaderRackManCtrl_cNormal or manual control of all header rack valvesCommandInactive=Inactive, Active=Active
BV503GeoWaterSelect_cSelection between Local (False) and Network (True) geothermal loop temperature valuesCommandInactive=Local, Active=Network
BV504HeaderY1output_stStatus of header rack Y1 compressor demand logical outputReadInactive=False, Active=True
BV505HeaderY2output_stStatus of header rack Y2 compressor demand logical outputReadInactive=False, Active=True
BV506HeaderHeatOutput_stStatus of header rack heat/cool B demand logical outputReadInactive=False, Active=True
BV507CWSensorFault_stIndication that the currently selected cold water control temperature is invalidReadInactive=False, Active=True
BV508HWSensorFault_stIndication that the currently selected hot water control temperature is invalidReadInactive=False, Active=True
BV509TempSensorFault_stSelected cold or hot water control temperature is invalidReadInactive=False, Active=True
BV510ManIsoValves_cManual control value for isolation valvesCommandInactive=Inactive, Active=Active
BV511HeaderModeSelect_cHeader rack mode from AV 568 (Numeric) or MSV 501 (Enumerated)CommandInactive=Enumerated, Active=Numeric
BV512NetIsoValve_Ctrl_cNetwork command to force the isolation valve fully openCommandInactive=False, Active=True
Object ID lookup: WaterFurnace Aurora HydroLink2 TruClimate point IDs by name

Integration notes

Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.

Questions about the WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers

How many BACnet points does the WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers have?

This list has 302 BACnet objects: 210 analog values, 74 binary values, 18 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers BACnet points are writable?

170 of the 302 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done.

Where is the official WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers BACnet documentation?

The source is HydroLink2 BACnet Objects, revision Version 3.04, published free by WaterFurnace at https://www.waterfurnace.com/literature/aurora/HydroLink2-BACnet-Objects-Version-3.04.xlsx.

What are the minimum BACnet points to integrate the WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers?

Start with BV 37 SystemEnable_c (System enable; compressors stay off when Disabled); BV 36 NetworkControl_c (Set to Network while the BAS has control); BV 2 EmShutdown_c (Network emergency shutdown); BV 1 Mode_c (Cool or heat (non-header-rack units)); AV 22 CoolingSetpoint_c (Cooling setpoint, setpoint control mode); AV 23 HeatingSetpoint_c (Heating setpoint, setpoint control mode); BV 33 AlarmReset_c (Alarm reset; return to Normal after the lockout clears); MV 1 UnitMode_st (Current operating mode); AV 1 ControlTemp_st (Control temperature (input chosen on MSV 3)); MV 0 SystemStatus_st (Overall status: normal, alarm, shutdown, load shed).

How do I enable BMS control of the WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers?

BV 37 SystemEnable_c (default Enabled) must be Enabled for the compressors to run. The BAS sets BV 36 NetworkControl_c to Network when it takes control. With MSV 2 = 3 (Network), BV 35 and BV 34 call compressors A and B and BV 1 picks cool or heat. BV 2 EmShutdown_c forces an emergency shutdown.

Can the BMS supply sensor values to the WaterFurnace Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers?

AV 62 NetworkTemperature_c is the BAS-supplied control temperature for setpoint control on a network temperature (MSV 3 option 4). Header rack builds take BAS cold and hot water temperatures on AV 506/507 (MSV 502/503 option 4) and network loop temperatures on AV 508 and AV 510-515.

How do I check these points on the real Aurora HydroLink2 for TruClimate 100 / TruClimate 500 Modular Chillers?

Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.

More WaterFurnace BACnet points lists

Source: HydroLink2 BACnet Objects · rev. Version 3.04. Object names, instances and units are reproduced as published; descriptions are our own.