{
 "manufacturer": "Carrier",
 "manufacturer_slug": "carrier",
 "model": "W2W Open",
 "model_slug": "w2w-open",
 "aliases": [
  "W2W Open",
  "Water-to-Water Open",
  "OPN-WSHPW2WM",
  "Carrier water-to-water heat pump controller",
  "11-808-538-01"
 ],
 "equipment_type": "Water-to-water heat pump controller",
 "applies_to": "Carrier water-to-water heat pumps fitted with the W2W Open (OPN-WSHPW2WM) multi-protocol controller.",
 "summary": "W2W Open is Carrier's i-Vu Open controller for water-to-water heat pumps. It heats or cools the load water to a chilled or hot water supply setpoint with up to 4 capacity stages, and DIP switches select BACnet MS/TP (the default), BACnet ARC156, Modbus or N2 (LonWorks by option card). The list has 76 objects: water setpoints and temperatures, compressor capacity and stages, pump status, enables, OA reset and demand-level settings, alarms and the 'system' points a BAS writes.",
 "bacnet_transport": [
  "BACnet MS/TP",
  "BACnet ARC156"
 ],
 "firmware": null,
 "default_device_instance": "16101xx (xx = rotary switch address)",
 "access_inferred": false,
 "notes": [
  "System points (system_oat, system_rh, system_t1_temp, system_elwt, system_llwt, system_ecwt) are network inputs; the guide says system points must be written at BACnet priority 16 and no more than once a minute, and -999 means no network value.",
  "The table prints System Mode (run_status, MSV:2002) twice. The first row has the water-to-water states (Safety Shutdown, Dehumidify, Pump Only) and is used here; the repeat on the last page has unit-ventilator style states (Fire Shutdown, Pre-Occ Purge) and was dropped.",
  "Shutdown (BV:9001) and RH Cooling Setpoint Reset (BV:1020) are printed with Normal/Alarm states; kept as printed.",
  "Units 'deg' on the system water temperature inputs are as printed.",
  "Each point also has a Modbus register in the same table (some later rows have none); only the BACnet side is captured here."
 ],
 "source": {
  "title": "W2W Open Integration Guide (Appendix A: Network Points List for W2W Open)",
  "doc_number": "11-808-538-01",
  "revision_date": "2021-06-15",
  "url": "https://www.shareddocs.com/hvac/docs/1000/Public/05/11-808-538-01.pdf"
 },
 "integration": {
  "summary": "Set the controller for BACnet MS/TP with its DIP switches and rotary address. The unit is occupied by default and holds the load water at the chilled or hot water supply setpoint; the BAS commands occupancy through keypad_ovrde and writes the water setpoints. Outdoor air, T1 or water temperatures from the BMS go into the system_* points at priority 16.",
  "minimum_points": [
   {
    "ref": "MV 1001",
    "name": "keypad_ovrde",
    "why": "BAS occupancy command: occupied/unoccupied"
   },
   {
    "ref": "BV 9001",
    "name": "shutdown",
    "why": "Network shutdown command"
   },
   {
    "ref": "AV 3024",
    "name": "chws_setpoint",
    "why": "Chilled water supply setpoint"
   },
   {
    "ref": "AV 3023",
    "name": "hws_setpoint",
    "why": "Hot water supply setpoint"
   },
   {
    "ref": "MV 2002",
    "name": "run_status",
    "why": "Current system mode"
   },
   {
    "ref": "AV 1020",
    "name": "lvg_load_wtr_temp",
    "why": "Leaving load water temperature"
   },
   {
    "ref": "AV 1019",
    "name": "ent_load_wtr_temp",
    "why": "Entering load water temperature"
   },
   {
    "ref": "AV 5002",
    "name": "total_comp_cap",
    "why": "Total compressor capacity, %"
   },
   {
    "ref": "BV 7013",
    "name": "comp_alarm",
    "why": "Compressor status alarm"
   },
   {
    "ref": "BV 7048",
    "name": "equip_alarm",
    "why": "General equipment alarm"
   }
  ],
  "enable": "The controller is occupied by default. A third-party BAS sets occupancy by writing BAS On/Off keypad_ovrde (MSV:1001): 1=Inactive, 2=Occupied, 3=Unoccupied; the sequence says this takes precedence over the other occupancy sources, while the system-point table says occupancy control must be set to 3 (BAS On/Off). No heating or cooling runs while unoccupied. Cool Enable (BV:1011) and Heat Enable (BV:1012) must be Enable; Shutdown (BV:9001) stops the unit.",
  "heartbeat": "No general heartbeat. The guide gives refresh windows for the generic system points (OAT 5 min / 60 min, space RH 5 min / 10 min); a network value is only used while it is refreshed in time.",
  "remote_sensors": "Write system_oat (AV:1901), system_rh (AV:1904), system_t1_temp (AV:1909) or the system water temperatures (AV:1910-1912) at BACnet priority 16, no more than once a minute. The controller clears a system point after processing it, so confirm a write by reading the control point (e.g. oa_temp, space_rh) at least 30 s later. System T1 is needed when Control Mode Selection uses T1 for heat/cool changeover.",
  "setup": [
   "MS/TP MAC address on rotary switches MSB (SW1) and LSB (SW2), 01-99; switch changes take effect after a power cycle.",
   "Device instance is generated as 16101xx (16 = Carrier vendor ID, xx = rotary address).",
   "SW3 DIP switches set protocol and baud (9600/19.2k/38.4k/76.8k, 76.8k default); 8N1 fixed. Network on port J19.",
   "Max Masters defaults to 127 and Max Info Frames to 10 (Equipment Touch). The controller counts as a full load on the MS/TP bus."
  ],
  "gotchas": [
   "System points must be written at priority 16; other priorities are ignored.",
   "Demand levels widen the water setpoints cumulatively (level 3 = level 1 + 2 + 3 adjustments); the demand level points themselves are read-only here.",
   "Only controllers set as MS/TP masters answer Who-Is.",
   "Multi-unit master/slave setups add linkage points (cw_link_status, mr_comm_fail) that only matter in those systems."
  ]
 },
 "points": [
  {
   "type": "AV",
   "instance": 2020,
   "name": "comp_stages",
   "description": "Active Compressor Stages",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3024,
   "name": "chws_setpoint",
   "description": "Chilled Water Supply Setpoint (default 44)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 5001,
   "name": "comp_cap",
   "description": "Compressor Capacity",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 9002,
   "name": "oat_cl_lockout",
   "description": "Cooling Lockout Temperature (default 45)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3005,
   "name": "eff_cl_stpt",
   "description": "Effective Cool Setpoint",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3006,
   "name": "eff_ht_stpt",
   "description": "Effective Heat Setpoint",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1019,
   "name": "ent_load_wtr_temp",
   "description": "Entering Load Water Temp",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 9003,
   "name": "oat_ht_lockout",
   "description": "Heating Lockout Temperature (default 65)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1020,
   "name": "lvg_load_wtr_temp",
   "description": "Leaving Load Water Temp",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 9037,
   "name": "max_cw_reset",
   "description": "Maximum OA CHW Reset (default 10)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1003,
   "name": "oa_temp",
   "description": "Outdoor Air Temperature",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 9007,
   "name": "start_delay",
   "description": "Power Fail Restart Delay (default 5)",
   "units": "seconds",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1011,
   "name": "space_rh",
   "description": "Space Relative Humidity",
   "units": "%rh",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1910,
   "name": "system_elwt",
   "description": "System Entering Load Water Temp (default -999)",
   "units": "deg",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1911,
   "name": "system_ecwt",
   "description": "System Entering Source Water Temp (default -999)",
   "units": "deg",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 80001,
   "name": "mstr_oa_temp",
   "description": "System OAT Master",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1901,
   "name": "system_oat",
   "description": "System Outdoor Air Temperature (default -999)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1909,
   "name": "system_t1_temp",
   "description": "System T1 Temperature (default -999)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 5002,
   "name": "total_comp_cap",
   "description": "Total System Cmpr Capacity",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 1011,
   "name": "cl_enable",
   "description": "Cool Enable (default Active (1))",
   "units": "",
   "access": "W",
   "states": "0=Disable, 1=Enable"
  },
  {
   "type": "BV",
   "instance": 1023,
   "name": "clg_stpt_oa_rst_ena",
   "description": "Cooling Setpoint OA Reset (default Inactive (0))",
   "units": "",
   "access": "W",
   "states": "0=Disable, 1=Enable"
  },
  {
   "type": "BV",
   "instance": 7041,
   "name": "ent_lwt_fail",
   "description": "Entering Load Water Temp Sensor alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7040,
   "name": "elwt_alarm",
   "description": "Entering Load Water Temperature alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 1012,
   "name": "ht_enable",
   "description": "Heat Enable (default Active (1))",
   "units": "",
   "access": "W",
   "states": "0=Disable, 1=Enable"
  },
  {
   "type": "BV",
   "instance": 1024,
   "name": "htg_stpt_oa_rst_ena",
   "description": "Heating Setpoint OA Reset (default Inactive (0))",
   "units": "",
   "access": "W",
   "states": "0=Disable, 1=Enable"
  },
  {
   "type": "BV",
   "instance": 7043,
   "name": "llwt_alarm",
   "description": "Leaving Load Water Temperature alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7042,
   "name": "lvg_cwt_fail",
   "description": "Leaving Source Water Temp Sensor alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 1019,
   "name": "load_pump",
   "description": "Load Water Pump",
   "units": "",
   "access": "R",
   "states": "0=Off, 1=On"
  },
  {
   "type": "BV",
   "instance": 2008,
   "name": "occ_status",
   "description": "Occupancy Status",
   "units": "",
   "access": "R",
   "states": "0=Unoccupied, 1=Occupied"
  },
  {
   "type": "BV",
   "instance": 7036,
   "name": "oat_alarm",
   "description": "Outdoor Air Temperature alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 1020,
   "name": "rh_clg_stpt_rst",
   "description": "RH Cooling Setpoint Reset (default Inactive (0))",
   "units": "",
   "access": "W",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 9001,
   "name": "shutdown",
   "description": "Shutdown (default Inactive (0))",
   "units": "",
   "access": "W",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 1021,
   "name": "pump_iso_vlv",
   "description": "Source Water Pump",
   "units": "",
   "access": "R",
   "states": "0=Off/Close, 1=On/Open"
  },
  {
   "type": "BV",
   "instance": 7027,
   "name": "cwt_alarm",
   "description": "Source Water Temperature alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7018,
   "name": "sprh_hi_alarm",
   "description": "Space Relative Humidity alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7022,
   "name": "sprh_sensor_fail",
   "description": "Space Relative Humidity Sensor alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7032,
   "name": "spt_sensor_fail",
   "description": "SPT Sensor alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7046,
   "name": "t1_fail",
   "description": "System T1 Sensor alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "MV",
   "instance": 1001,
   "name": "keypad_ovrde",
   "description": "BAS On / Off (default 2)",
   "units": "",
   "access": "W",
   "states": "1=Inactive, 2=Occupied, 3=Unoccupied"
  },
  {
   "type": "MV",
   "instance": 2002,
   "name": "run_status",
   "description": "System Mode",
   "units": "",
   "access": "R",
   "states": "1=Off, 2=Fan Only, 3=Economize, 4=Cooling, 5=Heating, 6=Cont Fan, 7=Test, 8=Start Delay, 9=Temer SAT, 10=Safety Shutdown, 11=Shutdown, 12=IAQ Override, 13=Dehumidify, 15=Pump Only"
  },
  {
   "type": "AV",
   "instance": 3023,
   "name": "hws_setpoint",
   "description": "Hot Water Supply Setpoint (default 120)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1912,
   "name": "system_llwt",
   "description": "System Leaving Load Water Temp (default -999)",
   "units": "deg",
   "access": "W",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 7044,
   "name": "lvg_lwt_fail",
   "description": "Leaving Load Water Temp Sensor alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "AV",
   "instance": 1017,
   "name": "cwl_temp",
   "description": "Leaving Source Water Temp",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 7029,
   "name": "oat_fail",
   "description": "Outdoor Air Temp Sensor alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "AV",
   "instance": 9038,
   "name": "max_hw_reset",
   "description": "Maximum OA HW Reset (default 20)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1904,
   "name": "system_rh",
   "description": "System Space RH (default -999)",
   "units": "%",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3016,
   "name": "eff_stpt",
   "description": "Water Temperature Setpoint",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3011,
   "name": "occ_dehum_stpt",
   "description": "Occ Relative Humidity Setpoint (default 60)",
   "units": "%rh",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 88001,
   "name": "total_comp_stg",
   "description": "Total Req Sys Comp Stgs",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 7055,
   "name": "zs_config_fail",
   "description": "ZS Sensor Configuration alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7013,
   "name": "comp_alarm",
   "description": "Compressor Status alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 2702,
   "name": "loop_pump",
   "description": "Loop Pump Status",
   "units": "",
   "access": "R",
   "states": "0=Off, 1=On"
  },
  {
   "type": "BV",
   "instance": 7049,
   "name": "sw_flow_alarm",
   "description": "Source Water Flow alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7057,
   "name": "load_flow_alarm",
   "description": "Load Water Flow alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7045,
   "name": "sys_ecwt_fail",
   "description": "System Entering Source Water Temp Fail",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "AV",
   "instance": 9006,
   "name": "cool_demand_level",
   "description": "System Cooling Demand Level",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 9036,
   "name": "heat_demand_level",
   "description": "System Heating Demand Level",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3020,
   "name": "h_dmd1_adj",
   "description": "Demand Level 1 Heat Adj (default 3)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 2701,
   "name": "cw_link_status",
   "description": "Source Water Linkage",
   "units": "",
   "access": "R",
   "states": "0=Inactive, 1=Active"
  },
  {
   "type": "AV",
   "instance": 3017,
   "name": "c_dmd1_adj",
   "description": "Demand Level 1 Cool Adj (default 3)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3018,
   "name": "c_dmd2_adj",
   "description": "Demand Level 2 Cool Adj (default 3)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3019,
   "name": "c_dmd3_adj",
   "description": "Demand Level 3 Cool Adj (default 4)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 7047,
   "name": "mr_comm_fail",
   "description": "Communications with Master alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "AV",
   "instance": 3021,
   "name": "h_dmd2_adj",
   "description": "Demand Level 2 Heat Adj (default 5)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 2701,
   "name": "link_cwt",
   "description": "Water Loop Temp",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 7031,
   "name": "cond_water_linkage_fail",
   "description": "Source Water Linkage alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "AV",
   "instance": 3022,
   "name": "h_dmd3_adj",
   "description": "Demand Level 3 Heat Adj (default 7)",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 7056,
   "name": "load_pmp_comm_fail",
   "description": "Load Water Flow Comm alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "AV",
   "instance": 2024,
   "name": "loop_request",
   "description": "Loop Pump Request",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 7058,
   "name": "src_pmp_comm_fail",
   "description": "Source Water Flow Comm alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7048,
   "name": "equip_alarm",
   "description": "Equipment Alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "BV",
   "instance": 7024,
   "name": "safety_alarm",
   "description": "Safety alarm",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "MV",
   "instance": 2004,
   "name": "fan_run",
   "description": "Fan / Speed",
   "units": "",
   "access": "R",
   "states": "1=Off, 2=Low, 3=Med, 4=High, 5=On"
  },
  {
   "type": "MV",
   "instance": 2009,
   "name": "start_type",
   "description": "Optimal Start Type (default (2) Temp Compensated)",
   "units": "",
   "access": "W",
   "states": "1=None, 2=Temp Compensated, 3=Learning Adaptive"
  },
  {
   "type": "MV",
   "instance": 2003,
   "name": "spt_status",
   "description": "Space Temp Source",
   "units": "",
   "access": "R",
   "states": "1=Sensor Failure, 2=SPT Sensor, 3=RAT / T55, 4=Network, 5=Airside Linkage, 6=Locked Value, 7=T-Stat Linkage, 8=ZS Sensor"
  }
 ],
 "page": "https://easybacnet.com/bacnet-points-lists/carrier/w2w-open",
 "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"
}