Easy BACnet- Home
- BACnet points lists
- AERCO
- C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD)
Boiler and water heater plant controller via ProtoNode gateway · BACnet points list
AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD) BACnet points list
Updated 28 October 2026
With the SSD (Slave/Slave Device) profile the AERCO ProtoNode RER sits on the BST or WHM Modbus network at fixed address 247 and serves the master's operating values and a 20-value block for each of up to 8 units on BACnet IP or BACnet MS/TP. The BMS changes the plant setpoint and setback values by writing them and then writing 1 to a send command. This file lists the master points and unit 1.
This page lists 46 BACnet objects for the AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD) — 5 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from AERCO’s own free documentation, linked below.
- Manufacturer
- AERCO
- Model
- C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD)
- Equipment
- Boiler and water heater plant controller via ProtoNode gateway
- Equipment type
- Boilers & water heaters
- BACnet objects
- 46 (5 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- Node_Offset + A-bank DIP switch value (MAC); the manual's example uses Node_Offset 50,000
- Also known as
- C-More, BST, Boiler Sequencing Technology, WHM, Water Heater Management, SSD, Slave/Slave Device, Innovation, KC, Benchmark, ProtoNode RER, 64084, GF-129, OMM-0080
BMS integration notes: AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD)
Select the SSD BACnet profile on the ProtoNode (S1 and A3 On, all other S and A1 Off); the gateway then talks to the BST/WHM master at address 247. To change the plant setpoint write AV 200 (and setback values AV 201-203 if used), then write 1 to AV 51 to send them. Read plant values from AV 100-119 and each unit's block from AV 300 onwards.
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 200 | Setpt | Plant setpoint to send, 40-200 °F | Write |
| AV 51 | Write Cntrl Val to BST/WHM | Write 1 to send AV 200-203 to the master | Write |
| AV 107 | Units Active | Units active, 0-8 | Read |
| AV 301 | Unit Status | Unit 1 status; 5 = Fault | Read |
| AV 101 | Setpoint | Plant setpoint in use, °F | Read |
| AV 110 | Header Temp | Header temperature, °F | Read |
| AV 106 | Avg Outlet Temp | Average outlet temperature, °F | Read |
| AV 108 | Units Faulted | Number of faulted units, 0-8 | Read |
| AV 302 | Fault Code | Unit 1 fault code (C-More codes) | Read |
Enable & remote start
No start/stop object. Write the new setpoint (AV 200) and, if used, setback setpoint and times (AV 201-203), then write 1 to AV 51 Write Cntrl Val to BST/WHM to pass them to the master.
Network setup
- SSD BACnet profile: S1 On and A3 On, S0/S2/S3 and A1 Off (SSD Modbus and SSD N2 profiles also exist).
- Device instance = Node_Offset (set in the Web Configurator) + A-bank DIP value; MS/TP MAC is 1-127 on A0-A7, baud on B0-B3.
- Default IP 192.168.1.24; change it in the ProtoNode web GUI.
- Modbus side: every AERCO unit at 9600 baud, 8 data bits, 1 stop bit, no parity.
- The gateway uses SSD address 247 on the BST/WHM Modbus network; units keep their own addresses.
Watch out for
- Writes to AV 200-203 do nothing until 1 is written to AV 51.
- AV 53 is read only despite sitting with the control values: 0 = WHM present, 1 = WHM absent.
- Unit Type codes 6-8 (water heaters) apply to WHM only; BST uses 1-5.
AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD) 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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AVmin | 51 | Write Cntrl Val to BST/WHM | BST/WHM master: write 1 to send the written values to BST/WHM | Write | ||
| AV | 53 | BST/WHM Timeout | BST/WHM master: master presence flag (read only) | Read | 0=WHM present, 1=WHM absent | |
| AV | 100 | Mode | BST/WHM master: master mode | Read | 0=Off, 1=Slave, 2=Master | |
| AVmin | 101 | Setpoint | BST/WHM master: setpoint in use (40-200) | °F | Read | |
| AV | 102 | Setback Setpt | BST/WHM master: setback setpoint (40-200) | °F | Read | |
| AV | 103 | Setback Start | BST/WHM master: setback start, minutes after midnight | min | Read | |
| AV | 104 | Setback End | BST/WHM master: setback end, minutes after midnight | min | Read | |
| AV | 105 | Auto Master | BST/WHM master: auto master status | Read | 0=No, 1=Yes | |
| AVmin | 106 | Avg Outlet Temp | BST/WHM master: average outlet temperature (30-245) | °F | Read | |
| AVmin | 107 | Units Active | BST/WHM master: units active (0-8) | Read | ||
| AVmin | 108 | Units Faulted | BST/WHM master: units faulted (0-8) | Read | ||
| AV | 109 | Master Addr | BST/WHM master: BST/WHM master address (0, 10-255) | Read | ||
| AVmin | 110 | Header Temp | BST/WHM master: header temperature | °F | Read | |
| AV | 111 | Outdoor Temp | BST/WHM master: outdoor temperature | °F | Read | |
| AV | 112 | Percent Output | BST/WHM master: plant percent output | % | Read | |
| AV | 113 | Number of Units Firing | BST/WHM master: number of units firing | Read | ||
| AV | 114 | Master Active Setpoint | BST/WHM master: master active setpoint | °F | Read | |
| AV | 115 | Next Turn-On Percent | BST/WHM master: next turn-on percent | % | Read | |
| AV | 116 | Header High Limit | BST/WHM master: header high limit | °F | Read | |
| AV | 117 | Header Low Limit | BST/WHM master: header low limit | °F | Read | |
| AV | 118 | Header Temp High Limit | BST/WHM master: header temperature high limit | °F | Read | |
| AV | 119 | Header Setpoint Mode | BST/WHM master: header setpoint mode | Read | ||
| AVmin | 200 | Setpt | BST/WHM master: setpoint to write (40-200) | °F | Write | |
| AV | 201 | Setback Setpt | BST/WHM master: setback setpoint to write (40-200) | °F | Write | |
| AV | 202 | Setback Start | BST/WHM master: setback start to write, minutes after midnight | min | Write | |
| AV | 203 | Setback End | BST/WHM master: setback end to write, minutes after midnight | min | Write | |
| AV | 300 | Comm Address | Unit 1: unit Modbus communication address (0-127) | Read | ||
| AVmin | 301 | Unit Status | Unit 1: unit operating status | Read | 0=Disabled, 1=Standby, 2=Manual Operation, 3=Remote Operation, 4=Auto Operation, 5=Fault | |
| AVmin | 302 | Fault Code | Unit 1: fault code (0-74, C-More fault codes) | Read | ||
| AV | 303 | Outlet Temp | Unit 1: outlet temperature (30-245) | °F | Read | |
| AV | 304 | FFWD Temp | Unit 1: feed-forward temperature (30-245) | °F | Read | |
| AV | 305 | Inlet Temp | Unit 1: inlet temperature (30-245) | °F | Read | |
| AV | 306 | Exhaust Temp | Unit 1: exhaust temperature (50-550) | °F | Read | |
| AV | 307 | Air Temp | Unit 1: inlet air temperature (-70 to 245) | °F | Read | |
| AV | 308 | Flame Strength | Unit 1: flame strength (0-100) | % | Read | |
| AV | 309 | Fire Rate In | Unit 1: fire rate input (0-100) | % | Read | |
| AV | 310 | Fire Rate Out | Unit 1: fire rate output (0-100) | % | Read | |
| AV | 311 | Unit Type | Unit 1: unit type code | Read | 1=KC Boiler LN, 2=BMK Boiler Std, 3=BMK Blr Std Dual, 4=BMK Boiler LN, 5=BMK Blr LN Dual, 6=KC Water Heater, 7=KC Wtr Heater LN, 8=Innovation WH | |
| AV | 312 | Unit Size | Unit 1: unit size code (0-21) | Read | 1=600 MBH, 2=800 MBH, 3=1060 MBH, 4=1350 MBH, 5=600 MBH, 6=800 MBH, 7=1060 MBH, 8=1350 MBH, 9=500 MBH, 10=750 MBH, 11=1000 MBH, 12=1.5 MBTU, 13=1500 MBH, 14=2.0 MBTU, 15=2000 MBH, 16=2500 MBH, 17=3.0 MBTU, 18=3000 MBH, 19=4000 MBH, 20=5000 MBH, 21=6000 MBH | |
| AV | 313 | Value State | Unit 1: valve state | Read | 0=Closed, 1=Open | |
| AV | 314 | Net Remote Setpt | Unit 1: network remote setpoint readback (40-200) | °F | Read | |
| AV | 315 | Run Cycles Upper | Unit 1: run cycles, upper 16 bits | Read | ||
| AV | 316 | Run Cycles Lower | Unit 1: run cycles, lower 16 bits | Read | ||
| AV | 317 | Run Hours Upper | Unit 1: run hours, upper 16 bits | Read | ||
| AV | 318 | Run Hours Lower | Unit 1: run hours, lower 16 bits | Read | ||
| AV | 319 | Oxygen Level | Unit 1: flue O2 level (0-25) | % | Read |
No points match these filters.
Integration notes
- Older document (OMM-0080_0H, November 2014) for the ProtoNode RER gateway.
- Unit blocks: unit n (1-8) uses AV 200 + 100 x n to AV 219 + 100 x n, so unit 1 = AV 300-319 and unit 8 = AV 1000-1019; only unit 1 is listed here.
- Run cycles = upper x 65536 + lower; run hours the same.
- Setback times are minutes after midnight (360 = 6 AM).
- The SSD keeps fixed Modbus address 247 so communication resumes after a BST/WHM master failover without BAS changes.
- The manual's point name for AV 313 is spelled Value State; the definition table calls it Valve State.
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. Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD) 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 AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD)
How many BACnet points does the AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD) have?
This list has 46 BACnet objects: 46 analog values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD) BACnet points are writable?
5 of the 46 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.
Where is the official AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD) BACnet documentation?
The source is AERCO ProtoNode Gateway User Manual (ProtoNode-RER / ProtoNode-LER), GF-129 (OMM-0080_0H), revision 2014-11-06, published free by AERCO at https://www.aerco.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/58249-source/637395359810000000/omm-0080-0h-gf-129-protonode-ler-rer-11-06-14.pdf.
What are the minimum BACnet points to integrate the AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD)?
Start with AV 200 Setpt (Plant setpoint to send, 40-200 °F); AV 51 Write Cntrl Val to BST/WHM (Write 1 to send AV 200-203 to the master); AV 107 Units Active (Units active, 0-8); AV 301 Unit Status (Unit 1 status; 5 = Fault); AV 101 Setpoint (Plant setpoint in use, °F); AV 110 Header Temp (Header temperature, °F); AV 106 Avg Outlet Temp (Average outlet temperature, °F); AV 108 Units Faulted (Number of faulted units, 0-8); AV 302 Fault Code (Unit 1 fault code (C-More codes)).
How do I enable BMS control of the AERCO C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD)?
No start/stop object. Write the new setpoint (AV 200) and, if used, setback setpoint and times (AV 201-203), then write 1 to AV 51 Write Cntrl Val to BST/WHM to pass them to the master.
How do I check these points on the real C-More boilers / water heaters with BST or WHM (ProtoNode RER SSD)?
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 AERCO BACnet points lists
- Boiler controller
AERCO Benchmark E / Edge X
AERCO Benchmark E (BMK E) condensing boilers with the Edge X controller, including BST cascade plants; the table also lists the legacy Benchmark (BMK) Edge equivalents.
Also known as: BMK E, BMKE, Benchmark, Edge X, Edge controller, OMM-0173 - Boiler controller and plant sequencer via ProtoNode gateway
AERCO C-More boilers with ACS / BMS II (ProtoNode RER)
AERCO boilers with the C-More controller plus an ACS or BMS II plant sequencer, read through the AERCO ProtoNode RER.
Also known as: C-More, C-More controller, ACS, BMS II, BMS, ProtoNode RER, ProtoNode-RER, 64084, FPC-N34, GF-129, OMM-0080 - Water heater controller via ProtoNode gateway
AERCO ECS and SmartPlate water heaters (ProtoNode RER)
AERCO SmartPlate and ECS (Electric Valve) water heaters, up to four, read through the AERCO ProtoNode RER.
Also known as: ECS, Electronic Control System, SmartPlate, SmartPlate water heater, E Valve, ProtoNode RER, 64084, GF-129, OMM-0080 - Commercial water heater controller
AERCO Edge [ii] water heater controller (standalone / WHM)
AERCO Innovation 1600-2000 water heaters with the Edge [ii] controller, run standalone or as a WHM (Water Heater Management) manager or client.
Also known as: Edge [ii], Edge ii, Edge 2, WHM, Water Heater Management, Centurion, OMM-0176, Innovation 1600-2000 - Boiler controller and plant sequencer via ProtoNode gateway
AERCO Modulex boilers with BCM and ACS / BMS II (ProtoNode RER)
AERCO Modulex boilers with a BCM, up to four, plus an ACS or BMS II sequencer, read through the AERCO ProtoNode RER.
Also known as: Modulex, MLX, Modulex E8, BCM, ACS, BMS II, ProtoNode RER, 64084, GF-129, OMM-0080
Source: AERCO ProtoNode Gateway User Manual (ProtoNode-RER / ProtoNode-LER), GF-129 · OMM-0080_0H · rev. 2014-11-06. Object names, instances and units are reproduced as published; descriptions are our own.