{
 "manufacturer": "Lochinvar",
 "manufacturer_slug": "lochinvar",
 "model": "Regent",
 "model_slug": "regent",
 "aliases": [
  "Regent IWH",
  "IWH500-1000"
 ],
 "equipment_type": "Commercial water heater controller",
 "applies_to": "Regent IWH 500-1000 commercial gas water heaters.",
 "summary": "The Regent water heater shares the Crest communication manual but has its own BACnet MS/TP object map. It covers DHW thermostat and setpoint commands, safety switch and relay states, temperatures, flow rate, combustion values and status codes.",
 "bacnet_transport": [
  "BACnet MS/TP"
 ],
 "firmware": null,
 "default_device_instance": "680000 + MAC address (base can be changed)",
 "notes": [
  "BACnet needs the optional Lochinvar Modbus/BACnet communication board; address and baud rate are set on its dip switches.",
  "The BACnet board is an MS/TP master only, so MAC addresses 0-127 are usable.",
  "AV 0 (Configuration) is a bitmask: set a bit to 1 to make the water heater use the BAS-written value instead of its own input.",
  "BAS-supplied temperatures must be rewritten every few seconds and other commands at least every 4 minutes, or the unit reverts to local control.",
  "Temperatures are in °C on the bus.",
  "AI 4-6 units are misprinted as \"5\" in the manual; they are percentages."
 ],
 "integration": {
  "summary": "The Regent water heater uses the same Modbus/BACnet board and configuration approach as the Crest: write AV 0 Configuration to say which values the BAS supplies, then command the DHW thermostat and setpoint. Most integrations simply read status, temperatures and the status, blocking and lockout codes.",
  "minimum_points": [
   {
    "ref": "AV 0",
    "name": "Configuration",
    "why": "Bitmask of BAS-supplied inputs; resend before commands"
   },
   {
    "ref": "BV 4",
    "name": "DHW Thermostat",
    "why": "DHW call from the BAS"
   },
   {
    "ref": "AV 3",
    "name": "DHW Setpoint",
    "why": "DHW setpoint from the BAS"
   },
   {
    "ref": "AI 13",
    "name": "Unit Status Code",
    "why": "What the heater is doing; 40 = lockout"
   },
   {
    "ref": "AI 8",
    "name": "Outlet Temperature",
    "why": "Heater outlet water temperature, °C"
   },
   {
    "ref": "AI 11",
    "name": "Firing Rate",
    "why": "Burner firing rate, %"
   },
   {
    "ref": "AI 15",
    "name": "Unit Lockout Code",
    "why": "Lockout cause; valid only when status code is 40"
   }
  ],
  "enable": "Set the Demand Configuration under Main Menu > Setup > BMS. ENABLE active / BMS inactive: local setpoints plus an enable (BV 4, packed in AV 1). ENABLE and BMS active: enable plus the AV 2 setpoint command. Set the matching AV 0 bits first.",
  "heartbeat": "The Regent communication timer is fixed at 300 s; if communication stops longer than that the unit reverts to its own controls. When the BAS sends a setpoint command it must refresh it at least every 4 seconds or the unit reverts to its own inputs.",
  "remote_sensors": "With the matching AV 0 bits set, the BAS can write AV 6 System Supply Temperature and AV 7 Building Recirculation Temperature (°C).",
  "setup": [
   "MAC address from dip switches 1-8 (master only, so 0-127); baud from switches 9-10: 9600, 19200, 38400 or 76800.",
   "Device instance = base 680000 + MAC address; the base can be changed."
  ],
  "gotchas": [
   "Resend the AV 0 configuration bits before each command.",
   "AI 4-6 units are misprinted as \"5\" in the manual; they are percentages."
  ]
 },
 "source": {
  "title": "Modbus and BACnet Communication Instructions (Crest FB/OF751-6001, FCB1000-6000 & Regent IWH500-1000)",
  "doc_number": "100161012_2000020084",
  "revision_date": "Rev X, 04/26",
  "url": "https://assets.lochinvar.com/damroot/Original/10017/MODB_100161012_2000020084_REV%20X_(71343).pdf"
 },
 "points": [
  {
   "type": "BV",
   "instance": 4,
   "name": "DHW Thermostat",
   "description": "Tank / DHW thermostat call",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 0,
   "name": "Hex Door Temperature Switch / MRHL",
   "description": "Safety / proving switch status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 1,
   "name": "Flow Switch",
   "description": "Safety / proving switch status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 2,
   "name": "Gas Pressure Switch 1",
   "description": "Safety / proving switch status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 4,
   "name": "Proof of Closure",
   "description": "Safety / proving switch status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 5,
   "name": "Blocked Drain Switch",
   "description": "Safety / proving switch status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 7,
   "name": "Flame 1",
   "description": "Flame status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 10,
   "name": "Blocked Vent Switch",
   "description": "Safety / proving switch status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 18,
   "name": "Gas Pressure Switch 2",
   "description": "Safety / proving switch status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 20,
   "name": "Flue Damper Switch",
   "description": "Safety / proving switch status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 22,
   "name": "Flame 2",
   "description": "Flame status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 29,
   "name": "DHW Thermostat",
   "description": "Tank / DHW thermostat call",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 32,
   "name": "Run Time Contacts",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 33,
   "name": "Alarm Contacts",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 34,
   "name": "Internal Circulation Pump",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 35,
   "name": "Cascade Isolation Valve",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 37,
   "name": "Gas Valve",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 40,
   "name": "Building Recirculation Pump",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 43,
   "name": "Flue Damper Output",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 48,
   "name": "Main Fan",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 50,
   "name": "External Spark / HSI",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 51,
   "name": "Air Valve Trigger",
   "description": "Output or relay status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 52,
   "name": "Air Proving Switch",
   "description": "Safety / proving switch status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 0,
   "name": "Binary Inputs 0-15",
   "description": "Packed word of binary inputs 0-15",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 1,
   "name": "Binary Inputs 16-31",
   "description": "Packed word of binary inputs 16-31",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 2,
   "name": "Binary Inputs 32-47",
   "description": "Packed word of binary inputs 32-47",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 3,
   "name": "System / Cascade Setpoint",
   "description": "Setpoint value",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 4,
   "name": "System Pump Speed",
   "description": "Pump speed output",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 5,
   "name": "Cascade Total Power",
   "description": "Total cascade firing capacity",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 6,
   "name": "Cascade Current Power",
   "description": "Current cascade firing rate",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 7,
   "name": "Outlet Setpoint",
   "description": "Setpoint value",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 8,
   "name": "Outlet Temperature",
   "description": "Temperature reading",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 9,
   "name": "Inlet Temperature",
   "description": "Temperature reading",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 10,
   "name": "Flue Temperature",
   "description": "Temperature reading",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 11,
   "name": "Firing Rate",
   "description": "Burner firing rate",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 13,
   "name": "Unit Status Code",
   "description": "Current operating status code",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 14,
   "name": "Unit Blocking Code",
   "description": "Active blocking (soft lockout) code",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 15,
   "name": "Unit Lockout Code",
   "description": "Active lockout code",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 18,
   "name": "Air Damper Target Angle",
   "description": "Combustion / flow value",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 19,
   "name": "Gas Damper Target Angle",
   "description": "Combustion / flow value",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 20,
   "name": "Fan Speed Target",
   "description": "Combustion / flow value",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 22,
   "name": "O2 Sensor Status",
   "description": "Combustion / flow value",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 23,
   "name": "Current Trim Factor",
   "description": "Combustion / flow value",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 24,
   "name": "Barometer",
   "description": "Combustion / flow value",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 25,
   "name": "Binary Inputs 48-63",
   "description": "Packed word of binary inputs 48-63",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 26,
   "name": "Lock-Out Error Leader",
   "description": "Lockout flag for this cascade unit",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 27,
   "name": "Lock-Out Error Member 1",
   "description": "Lockout flag for this cascade unit",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 28,
   "name": "Lock-Out Error Member 2",
   "description": "Lockout flag for this cascade unit",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 29,
   "name": "Lock-Out Error Member 3",
   "description": "Lockout flag for this cascade unit",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 30,
   "name": "Lock-Out Error Member 4",
   "description": "Lockout flag for this cascade unit",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 31,
   "name": "Lock-Out Error Member 5",
   "description": "Lockout flag for this cascade unit",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 32,
   "name": "Lock-Out Error Member 6",
   "description": "Lockout flag for this cascade unit",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 33,
   "name": "Lock-Out Error Member 7",
   "description": "Lockout flag for this cascade unit",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 35,
   "name": "Flame 1",
   "description": "Flame status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 36,
   "name": "Flame 2",
   "description": "Flame status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 37,
   "name": "Corrected O2 Reading",
   "description": "Combustion / flow value",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 38,
   "name": "Flow Rate",
   "description": "Combustion / flow value",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 0,
   "name": "Configuration",
   "description": "Bitmask selecting which values the BAS supplies",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1,
   "name": "Coils",
   "description": "Packed word of the binary value commands",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 2,
   "name": "0-10 Volt Input / Setpoint Command",
   "description": "BAS rate or setpoint command (0-100%)",
   "units": "%",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3,
   "name": "DHW Setpoint",
   "description": "Setpoint value",
   "units": "°C",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 6,
   "name": "System Supply Temperature",
   "description": "Temperature reading",
   "units": "°C",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 7,
   "name": "Building Recirculation Temperature",
   "description": "Temperature reading",
   "units": "°C",
   "access": "W",
   "states": ""
  }
 ],
 "page": "https://easybacnet.com/bacnet-points-lists/lochinvar/regent",
 "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"
}