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Heat pump water heater plant controller · BACnet points list
Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54) BACnet points list
Updated 6 November 2026
Lochinvar's ProtoNode FPC-N54 maps the Veritus / Emerge_X heat pump water heater controller to 54 BACnet objects. Binary inputs give thermostat, BMS enable, louver, recirculation pump, runtime, alarm and backup heat relay states; analog inputs give system and tank temperatures, packed per-unit status words, error codes and flow; eight analog values take BMS commands such as demand enable and tank setpoint.
This page lists 54 BACnet objects for the Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54) — 9 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Lochinvar’s own free documentation, linked below.
- Manufacturer
- Lochinvar
- Model
- Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54)
- Equipment
- Heat pump water heater plant controller
- Equipment type
- Heat pumps
- BACnet objects
- 54 (9 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Not stated
- Also known as
- Veritus, Emerge_X, Emerge X, Lochinvar Veritus, ProtoNode FPC-N54
Reference only, provided as-is: verify against Lochinvar’s current documentation and the live device before use. Not official Lochinvar information. Terms of use.
BMS integration notes: Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54)
Map the Demand Enable and Tank Setpoint AVs for control, then read system setpoint and temperatures, tank temperatures, the runtime and alarm relays, the packed units-in-run/lockout words and the SCB error and warning codes. The guide gives no command sequence, so check the Veritus/Emerge_X manual before writing Configuration or the backup heat objects.
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.
| Object | Name | Why | Access |
|---|---|---|---|
| AV 47 | Demand Enable | Demand enable command from the BMS | Write |
| AV 48 | Tank Setpoint | Tank (DHW) setpoint command | Write |
| AI 14 | System Setpoint | Active system setpoint | Read |
| AI 15 | System Supply Temperature | System supply water temperature | Read |
| AI 19 | Tank 1 Temperature | Tank 1 temperature | Read |
| BI 6 | Runtime Relay | Runtime relay state (plant running) | Read |
| AI 29 | Units In Run (1-16) | Packed run status, units 1-16 | Read |
| BI 7 | Alarm Relay | Alarm relay state | Read |
| AI 41 | SCB Error Code | Active system control board error code | Read |
Enable & remote start
AV 47 Demand Enable and AV 48 Tank Setpoint are the writable objects for control; BI 2 BMS Enable reads back the BMS enable input. The guide does not describe the values or the order to write them.
Sensors & values from the BMS
AV 49 0-10V BMS Input lets the BMS supply the analog input value; the guide does not say how it is scaled.
Network setup
- ProtoNode FPC-N54 to the unit: Modbus RTU, 19200 baud, no parity, 8 data bits, 1 stop bit.
- Give each unit a unique Node-ID (1-255). BACnet device instance = Node_Offset (default 50,000) + Node-ID.
- The BACnet IP or BACnet MS/TP field protocol is chosen in the ProtoNode web configurator; default IP 192.168.1.24.
Watch out for
- Access is inferred: the table has no read/write column; AVs (N2 AO) are treated as writable.
- Units Present/In Run/In Blocking/In Lockout come as four packed words each, covering units 1-64.
- Objects 11-13 are named after raw Modbus registers (30001-30003); their meaning is not given.
Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54) 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.
Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.
| Description | States | |||||
|---|---|---|---|---|---|---|
| BI | 1 | TSTAT | Thermostat input state | Read | ||
| BI | 2 | BMS Enable | BMS enable input state | Read | ||
| BI | 3 | Louver Proving | Read | |||
| BI | 4 | Louver Relay | Read | |||
| BI | 5 | Recirc Pump | Read | |||
| BImin | 6 | Runtime Relay | Read | |||
| BImin | 7 | Alarm Relay | Read | |||
| BI | 8 | Backup Heat 1 | Read | |||
| BI | 9 | Backup Heat 2 | Read | |||
| AI | 10 | Discrete Inputs 0-8 | Packed discrete inputs 0-8 | Read | ||
| AI | 11 | 30001 | Raw Modbus input register 30001 | Read | ||
| AI | 12 | 30002 | Raw Modbus input register 30002 | Read | ||
| AI | 13 | 30003 | Raw Modbus input register 30003 | Read | ||
| AImin | 14 | System Setpoint | Read | |||
| AImin | 15 | System Supply Temperature | Read | |||
| AI | 16 | System Return Temperature | Read | |||
| AI | 17 | System Recirc Temperature | Read | |||
| AI | 18 | System Outdoor Temperature | Read | |||
| AImin | 19 | Tank 1 Temperature | Read | |||
| AI | 20 | Tank 2 Temperature | Read | |||
| AI | 21 | Tank 3 Temperature | Read | |||
| AI | 22 | Tank 4 Temperature | Read | |||
| AI | 23 | Tank 5 Temperature | Read | |||
| AI | 24 | Tank 6 Temperature | Read | |||
| AI | 25 | Units Present (1-16) | Units present, units 1-16 (packed) | Read | ||
| AI | 26 | Units Present (17-32) | Read | |||
| AI | 27 | Units Present (33-48) | Read | |||
| AI | 28 | Units Present (49-64) | Read | |||
| AImin | 29 | Units In Run (1-16) | Units running, units 1-16 (packed) | Read | ||
| AI | 30 | Units In Run (17-32) | Read | |||
| AI | 31 | Units In Run (33-48) | Read | |||
| AI | 32 | Units In Run (49-64) | Read | |||
| AI | 33 | Units In Blocking (1-16) | Units in blocking, units 1-16 (packed) | Read | ||
| AI | 34 | Units In Blocking (17-32) | Read | |||
| AI | 35 | Units In Blocking (33-48) | Read | |||
| AI | 36 | Units In Blocking (49-64) | Read | |||
| AI | 37 | Units In Lockout (1-16) | Units in lockout, units 1-16 (packed) | Read | ||
| AI | 38 | Units In Lockout (17-32) | Read | |||
| AI | 39 | Units In Lockout (33-48) | Read | |||
| AI | 40 | Units In Lockout (49-64) | Read | |||
| AImin | 41 | SCB Error Code | System control board error code | Read | ||
| AI | 42 | SCB Warning Code | System control board warning code | Read | ||
| AI | 43 | Backup Heat 1 Rate | Read | |||
| AI | 44 | Backup Heat 2 Rate | Read | |||
| AI | 45 | Total Heat Pump Flow | Read | |||
| AV | 46 | Configuration | Configuration register | Write | ||
| AVmin | 47 | Demand Enable | Demand enable command | Write | ||
| AVmin | 48 | Tank Setpoint | Tank setpoint command | Write | ||
| AV | 49 | 0-10V BMS Input | BMS 0-10 V input value | Write | ||
| AV | 50 | Active Tank Sensor | Selects the active tank sensor | Write | ||
| AV | 51 | Backup Heat 1 | Write | |||
| AV | 52 | Backup Heat 2 | Write | |||
| AV | 53 | Backup Heat 1 Rate | Write | |||
| AV | 54 | Backup Heat 2 Rate | Write |
No points match these filters.
Object ID lookup: Lochinvar Veritus / Emerge_X heat pump water heater point IDs by name
BI1TSTATBI2BMS EnableBI3Louver ProvingBI4Louver RelayBI5Recirc PumpBI6Runtime RelayBI7Alarm RelayBI8Backup Heat 1BI9Backup Heat 2AI10Discrete Inputs 0-8AI1130001AI1230002AI1330003AI14System SetpointAI15System Supply TemperatureAI16System Return TemperatureAI17System Recirc TemperatureAI18System Outdoor TemperatureAI19Tank 1 TemperatureAI20Tank 2 TemperatureAI21Tank 3 TemperatureAI22Tank 4 TemperatureAI23Tank 5 TemperatureAI24Tank 6 TemperatureAI25Units Present (1-16)AI26Units Present (17-32)AI27Units Present (33-48)AI28Units Present (49-64)AI29Units In Run (1-16)AI30Units In Run (17-32)AI31Units In Run (33-48)AI32Units In Run (49-64)AI33Units In Blocking (1-16)AI34Units In Blocking (17-32)AI35Units In Blocking (33-48)AI36Units In Blocking (49-64)AI37Units In Lockout (1-16)AI38Units In Lockout (17-32)AI39Units In Lockout (33-48)AI40Units In Lockout (49-64)AI41SCB Error CodeAI42SCB Warning CodeAI43Backup Heat 1 RateAI44Backup Heat 2 RateAI45Total Heat Pump FlowAV46ConfigurationAV47Demand EnableAV48Tank SetpointAV490-10V BMS InputAV50Active Tank SensorAV51Backup Heat 1AV52Backup Heat 2AV53Backup Heat 1 RateAV54Backup Heat 2 Rate
Integration notes
- Veritus and Emerge_X share this one table in the guide (section 9.1).
- The table has no read/write column; access is inferred from the object type and the N2 type (AO = writable).
- Backup Heat 1/2 and their rates appear both as AIs (43-44, read) and as AVs (51-54, write).
- The guide gives no units, ranges or state texts.
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 Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54) 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 Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54)
How many BACnet points does the Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54) have?
This list has 54 BACnet objects: 36 analog inputs, 9 analog values, 9 binary inputs. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54) BACnet points are writable?
9 of the 54 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. The source has no read/write column, so this is inferred from object type.
Where is the official Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54) BACnet documentation?
The source is Operating Manual - ProtoNode FPC-N54 for Interfacing Lochinvar Products, section 9.1 Veritus and Emerge_X (CN1998 Rev 7.C (Lochinvar 100377812_2000809463 Rev B)), published free by Lochinvar at https://assets.lochinvar.com/damroot/Original/10014/100377812_2000809463_Rev%20B%20(60567)%20ProtoNode%20Operating%20Manual.pdf.
What are the minimum BACnet points to integrate the Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54)?
Start with AV 47 Demand Enable (Demand enable command from the BMS); AV 48 Tank Setpoint (Tank (DHW) setpoint command); AI 14 System Setpoint (Active system setpoint); AI 15 System Supply Temperature (System supply water temperature); AI 19 Tank 1 Temperature (Tank 1 temperature); BI 6 Runtime Relay (Runtime relay state (plant running)); AI 29 Units In Run (1-16) (Packed run status, units 1-16); BI 7 Alarm Relay (Alarm relay state); AI 41 SCB Error Code (Active system control board error code).
How do I enable BMS control of the Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54)?
AV 47 Demand Enable and AV 48 Tank Setpoint are the writable objects for control; BI 2 BMS Enable reads back the BMS enable input. The guide does not describe the values or the order to write them.
Can the BMS supply sensor values to the Lochinvar Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54)?
AV 49 0-10V BMS Input lets the BMS supply the analog input value; the guide does not say how it is scaled.
How do I check these points on the real Veritus / Emerge_X heat pump water heater (ProtoNode FPC-N54)?
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 Lochinvar BACnet points lists
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Lochinvar Armor volume water heaters, models 1250-4000, Series 100 and 101, with the SMART SYSTEM control and the Modbus/BACnet communication board.
Also known as: Armor, Armor 1250, Armor 4000, AWH, Armor Series 100, Armor Series 101, SMART SYSTEM, MTR-01, 100305786 - Commercial boiler / water heater / pool heater controller
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Lochinvar Copper-fin II/IIE boilers and water heaters (models 402-2072) and pool heaters (502-2072) with the SMART SYSTEM control.
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Lochinvar Crest
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Lochinvar IPW (ProtoNode FPC-N54)
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Also known as: IPW, Lochinvar IPW, ProtoNode FPC-N54 - Condensing boiler / water heater controller
Lochinvar Knight / Armor (SMART TOUCH)
Knight, Knight XL, Armor, Wall Mount, Wall Hung, AQUAS, FTXL and Shield boilers and water heaters with the SMART TOUCH control.
Also known as: Knight XL, Outdoor Knight, Armor, Wall Mount, Wall Hung, AQUAS, FTXL, Shield, MODB-I-O - Commercial boiler controller gateway
Lochinvar Knight FTXL (ProtoNode FPC-N54)
Lochinvar Knight FTXL fire-tube boilers, read through the ProtoNode FPC-N54 gateway.
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Lochinvar Lectrus electric boiler (KEB)
Lochinvar Lectrus electric boilers, models KEB 0015-0150, with the Modbus/BACnet communication board.
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Lochinvar Power Fin 2.5-5.0 (ProtoNode FPC-N54)
Lochinvar Power Fin boilers in the 2.5-5.0 size range (the guide's "Powerfin_2.5_5.0" profile), read through the ProtoNode FPC-N54 gateway.
Also known as: Power Fin 2.5-5.0, Power-Fin 2500-5000, PBN/PFN 2.5-5.0, Lochinvar Power Fin, ProtoNode FPC-N54 - Commercial boiler / water heater controller
Lochinvar Power-Fin (SMART SYSTEM)
Lochinvar Power-fin models 502-1302 and 1501-2001, with the SMART SYSTEM control and the Modbus/BACnet communication board.
Also known as: Power-fin, Powerfin, PBX-PFX-MODB, SMART SYSTEM - Commercial water heater controller
Lochinvar Regent
Regent IWH 500-1000 commercial gas water heaters.
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Lochinvar SYNC
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Source: Operating Manual - ProtoNode FPC-N54 for Interfacing Lochinvar Products, section 9.1 Veritus and Emerge_X · CN1998 Rev 7.C (Lochinvar 100377812_2000809463 Rev B). Object names, instances and units are reproduced as published; descriptions are our own.