{
 "manufacturer": "York",
 "manufacturer_slug": "york",
 "model": "Scroll Chiller / Heat Pump / Condensing Unit (native BACnet MS/TP)",
 "model_slug": "scroll-native",
 "short_model": "YORK Scroll native",
 "aliases": [
  "YORK scroll chiller",
  "YORK scroll heat pump",
  "YCWL",
  "YLAE",
  "031-02550",
  "C.MMC.13",
  "C.MMC.14",
  "C.MMC.16"
 ],
 "equipment_type": "Scroll chiller / heat pump / condensing unit",
 "applies_to": "YORK by Johnson Controls scroll-compressor chillers, heat pumps and condensing units (including YCWL and YLAE) with the 031-02550 board and its native BAS port.",
 "summary": "YORK scroll chillers, heat pumps and condensing units with the 031-02550 board have BACnet MS/TP, Modbus RTU and N2 built in. The BAS writes the remote setpoint, load limit stage, cooling range, heating setpoint, heat pump mode and start/stop (AV 1-7, BV 1). Everything else is read-only AI and BI objects: liquid and ambient temperatures, per-system suction and discharge values, EEV output, timers, cutouts and setpoints, compressor run status, operational and fault codes, and system alarms.",
 "bacnet_transport": [
  "BACnet MS/TP"
 ],
 "firmware": "C.MMC.13.11 / 14.11 / 16.12 to C.MMC.13.23 / 14.23 / 16.23 (031-02755)",
 "default_device_instance": null,
 "access_inferred": false,
 "notes": [
  "Access follows the sheet's sections: analog and binary write points (AV, BV) and read-only points (AI, BI).",
  "The sheet marks every point Standard, Optional or Not available for three firmware ranges. The points marked Not available on all of them (per-system start/stops BV 2-3 and the debug codes AI 29 and AI 31) are left out.",
  "Optional points depend on the unit: suction-pressure (SP) or discharge-air (DAT) condensing units, heat pumps (HP), YCWL, EEV and refrigerant type. Values that don't apply are sent as zero.",
  "Operational and fault codes are numeric AIs; the states list the code values from the sheet's code tables.",
  "Units shown are imperial; SI units are in the sheet."
 ],
 "source": {
  "title": "Scroll Chiller/Heatpump/Condensing Unit Modbus RTU, BACnet MS/TP, N2 Data Map (SCROLL Native Comms)",
  "doc_number": null,
  "revision_date": "2020-02-11",
  "url": "https://docs.johnsoncontrols.com/chillers/api/khub/documents/PqH6~F3kNniq~6xHrGxQAQ/content"
 },
 "integration": {
  "summary": "Put the unit in automatic/remote control (BI 20 reads Auto), then start/stop it with BV 1 and write the remote setpoint (AV 1) and, if needed, the load limit stage (AV 3). Read the leaving chilled liquid temperature, compressor run status, each system's operational code and the two system alarms.",
  "minimum_points": [
   {
    "ref": "BV 1",
    "name": "START_STOP",
    "why": "Remote start/stop (1 = run)"
   },
   {
    "ref": "AV 1",
    "name": "REM_SETP",
    "why": "Remote leaving chilled liquid setpoint"
   },
   {
    "ref": "AV 3",
    "name": "LOAD_LIMIT",
    "why": "Load limit stage (0, 1, 2)"
   },
   {
    "ref": "AI 25",
    "name": "S1_OP_CODE",
    "why": "Sys 1 operational code"
   },
   {
    "ref": "BI 5",
    "name": "S1_C1_RUN",
    "why": "Sys 1 compressor 1 running"
   },
   {
    "ref": "BI 20",
    "name": "CNTL_MODE",
    "why": "Local/remote control mode (1 = Auto)"
   },
   {
    "ref": "AI 1",
    "name": "LCHLT",
    "why": "Leaving chilled liquid temperature"
   },
   {
    "ref": "BI 1",
    "name": "S1_ALARM",
    "why": "System 1 alarm"
   },
   {
    "ref": "BI 2",
    "name": "S2_ALARM",
    "why": "System 2 alarm"
   },
   {
    "ref": "AI 26",
    "name": "S1_FLT_CODE",
    "why": "Sys 1 fault code (0 = none)"
   }
  ],
  "enable": "BI 20 shows the local/remote control mode (0 = Manual, 1 = Auto). The sheet gives no point to change it and no write-enable point. On heat pumps AV 7 selects panel, cool or heat.",
  "heartbeat": null,
  "remote_sensors": null,
  "setup": [
   "BACnet MS/TP, Modbus RTU and N2 are native on the board.",
   "The sheet gives no default MAC address, baud rate or device instance."
  ],
  "gotchas": [
   "Most data are AI/BI objects, not AV/BV; only AV 1-7 and BV 1 are writable.",
   "Several write points are optional and only act on matching units (SP/DAT condensing units, heat pumps, YCWL HP)."
  ]
 },
 "points": [
  {
   "type": "AV",
   "instance": 1,
   "name": "REM_SETP",
   "description": "Remote setpoint (99 = auto)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 2,
   "name": "SP_REM_SP_S1",
   "description": "Sys 1 Remote Setpoint (SP Unit)",
   "units": "PSI",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3,
   "name": "LOAD_LIMIT",
   "description": "Load limit stage (0, 1 or 2)",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 4,
   "name": "REM_CR",
   "description": "Remote Cooling Range (DAT Unit)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 5,
   "name": "SP_REM_SP_S2",
   "description": "Sys 2 Remote Setpoint (SP Unit)",
   "units": "PSI",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 6,
   "name": "REM_SP_HEAT",
   "description": "Remote Heating Setpoint (HP or YCWL HP)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 7,
   "name": "HP_MODE",
   "description": "Remote heat pump mode (HP or YCWL HP)",
   "units": "",
   "access": "W",
   "states": "0=Panel, 1=Cool, 2=Heat"
  },
  {
   "type": "BV",
   "instance": 1,
   "name": "START_STOP",
   "description": "Remote Start/Stop Command",
   "units": "",
   "access": "W",
   "states": "0=Stop, 1=Run"
  },
  {
   "type": "AI",
   "instance": 1,
   "name": "LCHLT",
   "description": "Leaving Chilled Liquid Temp",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 2,
   "name": "RCHLT",
   "description": "Entering Chilled Liquid Temp",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 3,
   "name": "DAT",
   "description": "Discharge Air Temp (DAT Unit)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 4,
   "name": "S1_SUCT_TEMP",
   "description": "Sys 1 suction temp (EEV, cond units, R-410a/R-454B)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 5,
   "name": "OAT",
   "description": "Ambient Air Temp",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 6,
   "name": "S1_SUCT_SH",
   "description": "Sys 1 Suction Superheat (EEV)",
   "units": "°F (diff)",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 7,
   "name": "S1_RUN_TIME",
   "description": "Sys 1 run time, seconds",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 8,
   "name": "S1_SUCT_PR",
   "description": "Sys 1 Suction Pressure",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 9,
   "name": "S1_DSCH_PR",
   "description": "Sys 1 Discharge Pressure",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 10,
   "name": "S1_CIR_TEMP",
   "description": "Sys 1 Cooler Inlet Refrigerant Temp (R-407c)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 11,
   "name": "S1_DEF_TEMP",
   "description": "Sys 1 Defrost Temperature (HP)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 12,
   "name": "S1_EEV_OUT",
   "description": "Sys 1 EEV Output % (EEV)",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 13,
   "name": "S1_AR_TIMER",
   "description": "Sys 1 Anti-Recycle Timer",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 14,
   "name": "AC_TIMER",
   "description": "Anti-coincident timer, seconds",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 15,
   "name": "S2_SUCT_TEMP",
   "description": "Sys 2 suction temp (EEV, cond units, R-410a/R-454B)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 16,
   "name": "S2_RUN_TIME",
   "description": "Sys 2 run time, seconds",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 17,
   "name": "S2_SUCT_PR",
   "description": "Sys 2 Suction Pressure",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 18,
   "name": "S2_DSCH_PR",
   "description": "Sys 2 Discharge Pressure",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 19,
   "name": "S2_CIR_TEMP",
   "description": "Sys 2 Cooler Inlet Refrigerant Temp (R-407c)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 20,
   "name": "S2_DEF_TEMP",
   "description": "Sys 2 Defrost Temperature (HP)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 21,
   "name": "S2_SUCT_SH",
   "description": "Sys 2 Suction Superheat (EEV)",
   "units": "°F (diff)",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 22,
   "name": "S2_AR_TIMER",
   "description": "Sys 2 Anti-Recycle Timer",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 23,
   "name": "S2_EEV_OUT",
   "description": "Sys 2 EEV Output % (EEV)",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 24,
   "name": "NUM_COMPS",
   "description": "Number of Compressors",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 25,
   "name": "S1_OP_CODE",
   "description": "Sys 1 Operational Code",
   "units": "",
   "access": "R",
   "states": "0=No Abnormal Condition, 1=Unit Switch OFF, 2=System Switch OFF, 3=Lockout, 4=Unit Fault, 5=System Fault, 6=Remote Shutdown, 7=Daily Schedule Shutdown, 8=No Run Permissive, 9=No Cool Load, 10=Anti-Coincidence Timer Active, 11=Anti-Recycle Timer Active, 12=Manual Override, 13=Suction Limiting, 14=Discharge Limiting, 16=Load Limiting, 17=Compressor(s) Running, 18=Heatpump Load Limiting, 19=Pumping Down"
  },
  {
   "type": "AI",
   "instance": 26,
   "name": "S1_FLT_CODE",
   "description": "Sys 1 Fault Code",
   "units": "",
   "access": "R",
   "states": "0=No Fault Code, 2=Low Ambient Temperature, 4=Low Leaving Chilled Liquid Temperature, 5=High Discharge Pressure, 7=Low Suction Pressure, 18=MP/HPCO Fault, 19=Low Evaporator Temperature, 22=Unit Motor Current, 23=Low Superheat, 24=Sensor Fault, 25=Discharge Inhibit, 26=MP/HPCO Inhibit, 27=Pump Trip, 28=Pump Fail Make Flow, 29=High Ambient Temperature, 30=Anti-Vacuum Low Pressure Cutout, 31=Flow Switch Open, 32=Leaving Chilled Liquid Temperature Sensor Fault"
  },
  {
   "type": "AI",
   "instance": 27,
   "name": "S2_OP_CODE",
   "description": "Sys 2 Operational Code",
   "units": "",
   "access": "R",
   "states": "0=No Abnormal Condition, 1=Unit Switch OFF, 2=System Switch OFF, 3=Lockout, 4=Unit Fault, 5=System Fault, 6=Remote Shutdown, 7=Daily Schedule Shutdown, 8=No Run Permissive, 9=No Cool Load, 10=Anti-Coincidence Timer Active, 11=Anti-Recycle Timer Active, 12=Manual Override, 13=Suction Limiting, 14=Discharge Limiting, 16=Load Limiting, 17=Compressor(s) Running, 18=Heatpump Load Limiting, 19=Pumping Down"
  },
  {
   "type": "AI",
   "instance": 28,
   "name": "S2_FLT_CODE",
   "description": "Sys 2 Fault Code",
   "units": "",
   "access": "R",
   "states": "0=No Fault Code, 2=Low Ambient Temperature, 4=Low Leaving Chilled Liquid Temperature, 5=High Discharge Pressure, 7=Low Suction Pressure, 18=MP/HPCO Fault, 19=Low Evaporator Temperature, 22=Unit Motor Current, 23=Low Superheat, 24=Sensor Fault, 25=Discharge Inhibit, 26=MP/HPCO Inhibit, 27=Pump Trip, 28=Pump Fail Make Flow, 29=High Ambient Temperature, 30=Anti-Vacuum Low Pressure Cutout, 31=Flow Switch Open, 32=Leaving Chilled Liquid Temperature Sensor Fault"
  },
  {
   "type": "AI",
   "instance": 30,
   "name": "S1_FAN_STAGE",
   "description": "Sys 1 Condenser Fan Stage",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 32,
   "name": "S2_FAN_STAGE",
   "description": "Sys 2 Condenser Fan Stage",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 33,
   "name": "CONTROL_MODE",
   "description": "Unit control mode",
   "units": "",
   "access": "R",
   "states": "1=LW, 2=RW, 3=DA, 4=SP, 5=HC, 6=HP"
  },
  {
   "type": "AI",
   "instance": 34,
   "name": "AR_TIME",
   "description": "Anti-Recycle Time Programmed",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 35,
   "name": "LCHLT_CUT",
   "description": "Leaving Chilled Liquid Temp Cutout",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 36,
   "name": "LOW_AMB_CUT",
   "description": "Low Ambient Temperature Cutout",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 37,
   "name": "SUCT_P_CO_HT",
   "description": "Low Suction Pressure Cutout Heating (HP)",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 38,
   "name": "L_SUCT_P_CO",
   "description": "Low Suction Pressure Cutout Cooling",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 39,
   "name": "H_DSCH_P_CO",
   "description": "High Discharge Pressure Cutout",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 40,
   "name": "COOL_SETP",
   "description": "Cooling Setpoint",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 41,
   "name": "SP_SETP_S1",
   "description": "Sys 1 Cooling Setpoint (SP Unit)",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 42,
   "name": "CONTROL_RG",
   "description": "Cooling Range",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 43,
   "name": "SP_CTL_RG_S1",
   "description": "Sys 1 Cooling Range (SP Unit)",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 44,
   "name": "SP_SETP_S2",
   "description": "Sys 2 Cooling Setpoint (SP Unit)",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 45,
   "name": "HEAT_SETP",
   "description": "Heating Setpoint (HP)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 46,
   "name": "SP_CTL_RG_S2",
   "description": "Sys 2 Cooling Range (SP Unit)",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 47,
   "name": "HEAT_RANGE",
   "description": "Heating Range (HP)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 48,
   "name": "S1_DSCH_TEMP",
   "description": "Sys 1 Discharge Temperature (EEV)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 49,
   "name": "S1_DSCH_SH",
   "description": "Sys 1 Discharge Superheat (EEV)",
   "units": "°F (diff)",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 50,
   "name": "S2_DSCH_TEMP",
   "description": "Sys 2 Discharge Temperature (EEV)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 51,
   "name": "S2_DSCH_SH",
   "description": "Sys 2 Discharge Superheat (EEV)",
   "units": "°F (diff)",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 52,
   "name": "LEAVING_HOT",
   "description": "Leaving Liquid Hot Temp (R-410a/R-454B)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 53,
   "name": "RETURN_HOT",
   "description": "Return Liquid Hot Temp (R-410a/R-454B)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 54,
   "name": "R_COOL_SETP",
   "description": "Remote Setpoint",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 55,
   "name": "R_SP_SETP_S1",
   "description": "Remote Setpoint 1 (SP Unit)",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 56,
   "name": "R_SP_SETP_S2",
   "description": "Remote Setpoint 2 (SP Unit)",
   "units": "PSI",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 57,
   "name": "R_HEAT_SETP",
   "description": "Remote Heating Setpoint (HP)",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 1,
   "name": "S1_ALARM",
   "description": "Sys 1 Alarm",
   "units": "",
   "access": "R",
   "states": "0=No Alarm, 1=Alarm"
  },
  {
   "type": "BI",
   "instance": 2,
   "name": "S2_ALARM",
   "description": "Sys 2 Alarm",
   "units": "",
   "access": "R",
   "states": "0=No Alarm, 1=Alarm"
  },
  {
   "type": "BI",
   "instance": 3,
   "name": "EVAP_HTR",
   "description": "Evaporator Heater Status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 4,
   "name": "EVAP_PUMP",
   "description": "Evaporator Pump",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 5,
   "name": "S1_C1_RUN",
   "description": "Sys 1 Comp 1 Run",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 6,
   "name": "S2_C1_RUN",
   "description": "Sys 2 Comp 1 Run",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 7,
   "name": "S1_LLSV",
   "description": "Sys 1 Liquid Line Solenoid Valve",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 8,
   "name": "S1_MODE_SV",
   "description": "Sys 1 Mode Solenoid Valve (HP)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 9,
   "name": "S1_HGBV",
   "description": "Sys 1 Hot Gas Bypass Valve",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 10,
   "name": "S1_BHS",
   "description": "Bivalent heat step (YLAE HP) or compressor heater (chillers)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 11,
   "name": "S1_C2_RUN",
   "description": "Sys 1 Comp 2 Run",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 12,
   "name": "S2_C2_RUN",
   "description": "Sys 2 Comp 2 Run",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 13,
   "name": "S2_LLSV",
   "description": "Sys 2 Liquid Line Solenoid Valve",
   "units": "",
   "access": "R",
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   "type": "BI",
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   "description": "Sys 2 Mode Solenoid Valve (HP)",
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   "type": "BI",
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   "type": "BI",
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   "name": "CH_LIQ_TYPE",
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   "description": "Local Remote Control Mode",
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   "type": "BI",
   "instance": 21,
   "name": "DATA_UNIT",
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   "states": "0=Imperial, 1=SI"
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  {
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   "name": "AUTO_LL",
   "description": "Lead Lag Control Mode",
   "units": "",
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  {
   "type": "BI",
   "instance": 23,
   "name": "S2_HGBV",
   "description": "Sys 2 Hot Gas Bypass Valve",
   "units": "",
   "access": "R",
   "states": ""
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 ],
 "page": "https://easybacnet.com/bacnet-points-lists/york/scroll-native",
 "note": "Provided as-is. Point availability varies by firmware and options; verify against the live device.",
 "disclaimer": "DISCLAIMER: reference only, provided AS IS with no warranty. May contain errors or be out of date. You must verify every point against the manufacturer's current documentation and the live device before use. easybacnet.com accepts no liability for its use and is not affiliated with the manufacturer. Terms: https://easybacnet.com/terms#content"
}