Easy BACnet
  1. Home
  2. BACnet points lists
  3. Contemporary Controls
  4. AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX

Chiller / heat pump controller · BACnet points list

Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX BACnet points list

Updated 12 November 2026

Short answer

Gateway profile for AERMEC units with the AER485 interface: 99 objects (21 AI, 9 AO, 61 BI, 8 BO), all polled. Binary outputs switch standby/on, cooling/heating, local/remote and safety reset; analog outputs set cooling and heating setpoints and differentials. Inputs give defrost, alarm and load states per circuit, compressors, pumps and valves, and the water, liquid and outside temperatures.

This page lists 99 BACnet objects for the Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX — 17 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Contemporary Controls’s own free documentation, linked below.

Manufacturer
Contemporary Controls
Model
AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX
Equipment
Chiller / heat pump controller
Equipment type
Chillers
BACnet objects
99 (17 writable)
Transport
BACnet IP
Firmware
Not stated
Also known as
AER485, AERMEC Modbus, AERMEC chiller, AERMEC heat pump
Source document
BASgatewayLX Modbus device profile AERMEC_AER485_a · AERMEC_AER485_a_LX.csv
Download CSV 99 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

Reference only, provided as-is: verify against Contemporary Controls’s current documentation and the live device before use. Not official Contemporary Controls information. Terms of use.

BMS integration notes: Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX

Integration in brief

Put the unit in remote (BO 4), switch it on (BO 1), pick cooling or heating (BO 2) and write the matching setpoint. Read water temperatures, compressor and pump states and the circuit alarms.

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.

ObjectNameWhyAccess
BO 4Local/remote command (toggle) 0=LOCAL 1=REMOTELocal/remote (1 = remote)Command
BO 1Standby/On command (toggle) 0=OFF 1=ONStandby/on (1 = on)Command
BO 2Cooling/Heating mode command (toggle) 0=COLD 1=HOTCooling/heating (0 = cool, 1 = heat)Command
AO 70Cooling mode settingCooling setpointCommand
AO 71Heating mode settingHeating setpointCommand
BO 3Safety reset command 1=RESETSafety reset (1 = reset)Command
AI 77Water input temperatureWater inlet temperatureRead
AI 78Circuit 1 water outlet temperatureWater outlet temperature, circuit 1Read
BI 35Circuit 1 compressor loadCircuit 1 compressor onRead
BI 7Circuit 1 alarm summary conditionCircuit 1 alarm summaryRead

Enable & remote start

The unit takes BMS commands only in remote: set Local/remote (BO 4) to 1 first.

Network setup

Watch out for

Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX 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.

99 of 99 shown
Type
Access
Show
Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX BACnet Points List
DescriptionStates
BOmin1Standby/On command (toggle) 0=OFF 1=ONModbus 000001Command
BOmin2Cooling/Heating mode command (toggle) 0=COLD 1=HOTModbus 000002Command
BOmin3Safety reset command 1=RESETModbus 000003Command
BOmin4Local/remote command (toggle) 0=LOCAL 1=REMOTEModbus 000004Command
BI5Defrosting status circuit 1Modbus 000005Read
BI6Defrosting status circuit 2Modbus 000006Read
BImin7Circuit 1 alarm summary conditionModbus 000007Read
BI8Circuit 2 alarm summary conditionModbus 000008Read
BI9Flow switch alarmModbus 000009Read
BI10Condenser pump heating alarmModbus 000010Read
BI11Evaporator pump heating alarmModbus 000011Read
BI12Efficiency alarmModbus 000012Read
BI13Circuit 1 compressor heating alarmModbus 000013Read
BI14Low circuit 1 pressure alarmModbus 000014Read
BI15High circuit 1 pressure alarmModbus 000015Read
BI16Circuit 1 antifreeze alarmModbus 000016Read
BI17Circuit 1 fan heating alarmModbus 000017Read
BI18Circuit 1 oil pressure switch alarmModbus 000018Read
BI19Probe alarm circuit 1Modbus 000019Read
BI20Circuit 2 compressor heating alarmModbus 000020Read
BI21Low circuit 2 pressure alarmModbus 000021Read
BI22High circuit 2 pressure alarmModbus 000022Read
BI23Circuit 2 antifreeze alarmModbus 000023Read
BI24Circuit 2 fan heating alarmModbus 000024Read
BI25Circuit 2 oil pressure switch alarmModbus 000025Read
BI26Probe alarm circuit 2Modbus 000026Read
BI27Voltage monitor alarmModbus 000027Read
BI28Circuit 1 pumpdown alarmModbus 000028Read
BI29Circuit 2 pumpdown alarmModbus 000029Read
BI30Eprom alarmModbus 000030Read
BI31Clock calendar alarmModbus 000031Read
BI32Evaporator pump loadModbus 000032Read
BI33Pressure bypass valve loadModbus 000033Read
BI34Condenser pump loadModbus 000034Read
BImin35Circuit 1 compressor loadModbus 000035Read
BI36Circuit 1 capacity control valve loadModbus 000036Read
BI37Circuit 1 inversion loadModbus 000037Read
BI38Circuit 1 bypass valve loadModbus 000038Read
BI39Circuit 1 fan loadModbus 000039Read
BI40Circuit 1 exchanger heater loadModbus 000040Read
BI41Circuit 1 liquid valve loadModbus 000041Read
BI42Circuit 1 secondary compressor loadModbus 000042Read
BI43Circuit 2 compressor loadModbus 000043Read
BI44Circuit 2 capacity control valve loadModbus 000044Read
BI45Circuit 2 inversion loadModbus 000045Read
BI46Circuit 2 bypass valve loadModbus 000046Read
BI47Circuit 2 fan loadModbus 000047Read
BI48Circuit 2 exchanger heater loadModbus 000048Read
BI49Circuit 2 liquid valve loadModbus 000049Read
BI50Circuit 2 secondary compressor loadModbus 000050Read
BI51Circuit 1 VRT heat recovery unit valve loadModbus 000051Read
BI52Circuit 2 VRT heat recovery unit valve loadModbus 000052Read
BO53Circuit 1 VB heat recovery unit valve loadModbus 000053Command
BO54Circuit 1 VR heat recovery unit valve loadModbus 000054Command
BO55Circuit 2 VB heat recovery unit valve loadModbus 000055Command
BO56Circuit 2 VR heat recovery unit valve loadModbus 000056Command
BI57Integration 1 resistance loadModbus 000057Read
BI58Integration 2 resistance loadModbus 000058Read
BI59Integration 3 resistance loadModbus 000059Read
BI60Evaporator pump 2 loadModbus 000060Read
BI61Evaporator pump 3 loadModbus 000080Read
BI62Heat recovery unit flow switch alarmModbus 000081Read
BI63Circuit 1A compressor heating alarmModbus 000082Read
BI64Circuit 2A compressor heating alarmModbus 000083Read
BI65Evaporator pump 1 heating alarmModbus 000084Read
BI66Evaporator pump 2 heating alarmModbus 000085Read
BI67Evaporator pump 3 heating alarmModbus 000086Read
BI68Circuit 1 evaporator antifreeze alarmModbus 000087Read
BI69Circuit 2 evaporator antifreeze alarmModbus 000088Read
AOmin70Cooling mode settingModbus 400001Command
AOmin71Heating mode settingModbus 400002Command
AO72Differential step setting for thermostatModbus 400003Command
AO73Total differential setting per thermostatModbus 400004Command
AO74Heating mode setting for managing the heat recovery unitModbus 400016Command
AO75Total differential setting for thermostat managing the heat recovery unitModbus 400017Command
AO76Differential step setting for thermostat managing the heat recovery unitModbus 400018Command
AImin77Water input temperatureModbus 400019Read
AImin78Circuit 1 water outlet temperatureModbus 400020Read
AI79Circuit 2 water outlet temperatureModbus 400021Read
AI80Outside air temperatureModbus 400022Read
AI81Liquid temperature circuit 1Modbus 400023Read
AI82Liquid temperature circuit 2Modbus 400024Read
AI83Condenser water inlet temperatureModbus 400025Read
AI84Condenser water outlet temperature circuit 1Modbus 400026Read
AI85Condenser water outlet temperature circuit 2Modbus 400027Read
AI86Recovery exchanger water inlet temperatureModbus 400028Read
AI87Recovery exchanger water outlet temperature circuit 1Modbus 400029Read
AI88Recovery exchanger water outlet temperature circuit 2Modbus 400030Read
AI89High pressure circuit 1Modbus 400031Read
AI90High pressure circuit 2Modbus 400032Read
AI91Low pressure circuit 1Modbus 400033Read
AI92Low pressure circuit 2Modbus 400034Read
AO93Second cooling setModbus 400042Command
AO94second heating setModbus 400043Command
AI95Working hours compressor circuit 1Modbus 400014Read
AI96Working hours compressor circuit 2Modbus 400134Read
AI97Select daily/weekly timer modeModbus 400143Read
AI98Circuit 1A compressor working hoursModbus 400170Read
AI99Circuit 2A compressor working hoursModbus 400171Read
Object ID lookup: Contemporary Controls BASgatewayLX AERMEC AER485 point IDs by name

Integration notes

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 AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX 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 Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX

How many BACnet points does the Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX have?

This list has 99 BACnet objects: 21 analog inputs, 9 analog outputs, 61 binary inputs, 8 binary outputs. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX BACnet points are writable?

17 of the 99 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 Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX BACnet documentation?

The source is BASgatewayLX Modbus device profile AERMEC_AER485_a (AERMEC_AER485_a_LX.csv), published free by Contemporary Controls at https://www.ccontrols.com/support/dp/AERMEC_AER485_a_LX.zip.

What are the minimum BACnet points to integrate the Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX?

Start with BO 4 Local/remote command (toggle) 0=LOCAL 1=REMOTE (Local/remote (1 = remote)); BO 1 Standby/On command (toggle) 0=OFF 1=ON (Standby/on (1 = on)); BO 2 Cooling/Heating mode command (toggle) 0=COLD 1=HOT (Cooling/heating (0 = cool, 1 = heat)); AO 70 Cooling mode setting (Cooling setpoint); AO 71 Heating mode setting (Heating setpoint); BO 3 Safety reset command 1=RESET (Safety reset (1 = reset)); AI 77 Water input temperature (Water inlet temperature); AI 78 Circuit 1 water outlet temperature (Water outlet temperature, circuit 1); BI 35 Circuit 1 compressor load (Circuit 1 compressor on); BI 7 Circuit 1 alarm summary condition (Circuit 1 alarm summary).

How do I enable BMS control of the Contemporary Controls AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX?

The unit takes BMS commands only in remote: set Local/remote (BO 4) to 1 first.

How do I check these points on the real AERMEC chillers/heat pumps via AER485 interface via BASgatewayLX?

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 Contemporary Controls BACnet points lists

Source: BASgatewayLX Modbus device profile AERMEC_AER485_a · AERMEC_AER485_a_LX.csv. Object names, instances and units are reproduced as published; descriptions are our own.