{
 "manufacturer": "Lochinvar",
 "manufacturer_slug": "lochinvar",
 "model": "Armor 1250-4000 water heater (SMART SYSTEM)",
 "model_slug": "armor-1250-4000",
 "aliases": [
  "Armor",
  "Armor 1250",
  "Armor 4000",
  "AWH",
  "Armor Series 100",
  "Armor Series 101",
  "SMART SYSTEM",
  "MTR-01",
  "100305786"
 ],
 "equipment_type": "Commercial condensing water heater controller",
 "applies_to": "Lochinvar Armor volume water heaters, models 1250-4000, Series 100 and 101, with the SMART SYSTEM control and the Modbus/BACnet communication board.",
 "summary": "The large Armor water heaters (1250-4000 MBH) talk BACnet MS/TP through Lochinvar's add-on Modbus/BACnet communication board. The fixed object map has two writable binary values (enable and tank thermostat), safety-switch and output status inputs, temperatures, firing rate, status/blocking/lockout codes, cascade totals, and analog values the BAS writes for configuration, rate or setpoint, tank setpoint and tank temperature.",
 "bacnet_transport": [
  "BACnet MS/TP"
 ],
 "firmware": null,
 "default_device_instance": "640000 + MAC address",
 "access_inferred": false,
 "notes": [
  "BACnet needs the optional communication board; its address and baud rate are set on dip switches.",
  "The board is an MS/TP master only, so MAC addresses 0-127 are usable.",
  "AV 0 (Configuration) is a bitmask: setting a bit tells the heater to use the BAS-written value instead of its own input.",
  "AI 0-2 and AI 25 pack the binary inputs into 16-bit words.",
  "Temperatures are in °C on the bus.",
  "Revision C of this manual changed the analog-value table; earlier revisions list different analog values."
 ],
 "source": {
  "title": "Modbus and BACnet Communication Instructions, Armor Models 1250-4000, Series 100 & 101",
  "doc_number": "100305786_2000558371 Rev C",
  "revision_date": "2022-09",
  "url": "https://assets.lochinvar.com/damroot/Original/10014/100305786_2000558371_Rev%20C_AWH%20Modbus%20Bacnet%20Manual%20(52880).pdf"
 },
 "integration": {
  "summary": "Set parameter H5 ModBus to Active on the SMART SYSTEM control, then write AV 0 Configuration so the heater knows which values the BAS will supply. After that the BAS sends an enable (BV 0 / AV 1), a rate or setpoint command (AV 2), or both, and keeps rewriting them. Status, temperatures and the status, blocking and lockout codes can be read without taking control.",
  "minimum_points": [
   {
    "ref": "AV 0",
    "name": "Configuration",
    "why": "Bitmask of BAS-supplied inputs; resend before commands"
   },
   {
    "ref": "AV 1",
    "name": "Coils",
    "why": "Enable command: 1 = enable, 0 = disable"
   },
   {
    "ref": "AV 2",
    "name": "0-10 Volt Input / Rate Command / Setpoint Command",
    "why": "Rate command: firing % or setpoint, per BMS Type"
   },
   {
    "ref": "AI 13",
    "name": "Status Code",
    "why": "What the heater is doing; 40 = lockout"
   },
   {
    "ref": "AI 8",
    "name": "Outlet Temperature",
    "why": "Outlet water temperature, °C"
   },
   {
    "ref": "AI 11",
    "name": "Firing Rate",
    "why": "Burner firing rate, %"
   },
   {
    "ref": "AI 15",
    "name": "Lockout Code",
    "why": "Lockout cause; valid only when status code is 40"
   }
  ],
  "enable": "Set H5 ModBus = Active. Enable only (local setpoints): AV 0 = 0x0001 and AV 1 Coils = 1 (0 disables). Enable plus rate: AV 0 = 0x0005, AV 1 = 1 and AV 2 = modulation % or setpoint. Rate only: AV 0 = 0x0004 and AV 2. AV 2 is a firing % or a setpoint depending on the BMS Type setting; as a setpoint it is scaled like a 0-10 V signal between the BMS temperatures set for the low and high analog input.",
  "heartbeat": "BAS-written tank temperature and the 0-10 V/rate value must be refreshed every few seconds; parameter H6 ModBus Time sets the timeout (the manual gives 5-120 s with a 10 s default in one place and 1-255 s in another). Other commands such as the enable have a fixed 4-minute timeout. When either timer runs out the heater goes back to its local inputs.",
  "remote_sensors": "Set the AV 0 bits for the values the BAS will supply, then write AV 3 tank setpoint and/or AV 4 tank temperature (°C). The tank temperature must be rewritten every few seconds or the heater returns to its own sensor.",
  "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 = 640000 + MAC address (e.g. MAC 50 = 640050).",
   "RS-485 bus up to 4000 ft, 24 AWG shielded twisted pair, 120 ohm termination at each end, up to 32 nodes."
  ],
  "gotchas": [
   "The manual says to resend the AV 0 configuration bits before each command.",
   "In a cascade only the leader needs the board for control; it then reports cascade totals only, so fit a board to every unit to see each one.",
   "Without H5 set to Active the board is monitor-only.",
   "The lockout code changes during normal operation; read it only when the status code is 40."
  ]
 },
 "points": [
  {
   "type": "BV",
   "instance": 0,
   "name": "Enable",
   "description": "BAS enable command (also packed in AV 1)",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "BV",
   "instance": 4,
   "name": "Tank Thermostat",
   "description": "BAS tank thermostat call",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 0,
   "name": "Manual Reset High Limit",
   "description": "Manual reset high limit input",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 1,
   "name": "Flow Switch",
   "description": "Flow switch input",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 2,
   "name": "Gas Pressure Switch",
   "description": "Gas pressure switch input",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 3,
   "name": "Louver Proving Switch",
   "description": "Louver proving switch input",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 5,
   "name": "Blocked Drain Switch",
   "description": "Blocked drain switch input",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 6,
   "name": "Auto Reset High Limit",
   "description": "Auto reset high limit input",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 7,
   "name": "Flame",
   "description": "Flame detected",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 8,
   "name": "Enable",
   "description": "Enable input status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 9,
   "name": "Tank Thermostat",
   "description": "Tank thermostat input status",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 32,
   "name": "Run Time Contacts",
   "description": "Run-time contacts closed",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 33,
   "name": "Alarm Contacts",
   "description": "Alarm contacts closed",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 35,
   "name": "DHW Pump",
   "description": "DHW pump output",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 37,
   "name": "Gas Valve",
   "description": "Gas valve output",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 38,
   "name": "Recirculation Pump",
   "description": "Recirculation pump output",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "BI",
   "instance": 48,
   "name": "Power Fan",
   "description": "Blower (fan) power output",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 0,
   "name": "Binary Inputs 0-15",
   "description": "Packed copy of binary inputs 0-15",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 1,
   "name": "Binary Inputs 16-31",
   "description": "Packed copy of binary inputs 16-31",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 2,
   "name": "Binary Inputs 32-47",
   "description": "Packed copy of binary inputs 32-47",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 3,
   "name": "System / Cascade Setpoint",
   "description": "Active system or cascade setpoint",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 5,
   "name": "Cascade Total Power",
   "description": "Total cascade capacity, 100-800 %",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 6,
   "name": "Cascade Current Power",
   "description": "Cascade firing rate now, 0-800 %",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 8,
   "name": "Outlet Temperature",
   "description": "Outlet water temperature",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 9,
   "name": "Inlet Temperature",
   "description": "Inlet water temperature",
   "units": "°C",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 10,
   "name": "Flue Temperature",
   "description": "Flue gas temperature",
   "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": "Status Code",
   "description": "Appliance status code; 40 = lockout",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 14,
   "name": "Blocking Code",
   "description": "Blocking reason code; 0 = none",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 15,
   "name": "Lockout Code",
   "description": "Lockout cause; valid when status code is 40",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 25,
   "name": "Binary Inputs 48-63",
   "description": "Packed copy of binary inputs 48-63",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 26,
   "name": "Lock-Out Error Leader",
   "description": "Cascade leader lockout flag (0-1)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 27,
   "name": "Lock-Out Error Member 1",
   "description": "Cascade member 1 lockout flag (0-1)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 28,
   "name": "Lock-Out Error Member 2",
   "description": "Cascade member 2 lockout flag (0-1)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 29,
   "name": "Lock-Out Error Member 3",
   "description": "Cascade member 3 lockout flag (0-1)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 30,
   "name": "Lock-Out Error Member 4",
   "description": "Cascade member 4 lockout flag (0-1)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 31,
   "name": "Lock-Out Error Member 5",
   "description": "Cascade member 5 lockout flag (0-1)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 32,
   "name": "Lock-Out Error Member 6",
   "description": "Cascade member 6 lockout flag (0-1)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 33,
   "name": "Lock-Out Error Member 7",
   "description": "Cascade member 7 lockout flag (0-1)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 0,
   "name": "Configuration",
   "description": "Bitmask of values the BAS will supply",
   "units": "",
   "access": "W",
   "states": "Bit 0 Enable, bit 1 Tank Thermostat, bit 2 Rate/0-10 V/Setpoint Command, bit 3 Tank Setpoint, bit 6 Tank Temperature"
  },
  {
   "type": "AV",
   "instance": 1,
   "name": "Coils",
   "description": "Packed BAS commands (enable, tank thermostat)",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 2,
   "name": "0-10 Volt Input / Rate Command / Setpoint Command",
   "description": "Rate (modulation %) or setpoint command, per BMS Type",
   "units": "%",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3,
   "name": "Tank Setpoint",
   "description": "Tank setpoint from the BAS, 0-87.5 °C",
   "units": "°C",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 4,
   "name": "Tank Temperature",
   "description": "Tank temperature from the BAS",
   "units": "°C",
   "access": "W",
   "states": ""
  }
 ],
 "page": "https://easybacnet.com/bacnet-points-lists/lochinvar/armor-1250-4000",
 "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"
}