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Walk-in cooler / freezer refrigeration controller · BACnet points list
Heatcraft intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller BACnet points list
Updated 12 November 2026
Short answer
The iIC is an add-on card for the intelliGen walk-in refrigeration controller that connects it to a BMS over RS-485 using BACnet MS/TP or Modbus RTU. System-wide (global) objects cover box temperature, operating mode, alarms, setpoints, defrost settings and schedules. Per-evaporator (local) objects come in blocks of 8, one per evaporator, for sensor values, EXV position, fan settings, alarms and refrigerant-detection (RDS) data.
This page lists 111 BACnet objects for the Heatcraft intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller — 71 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Heatcraft’s own free documentation, linked below.
- Manufacturer
- Heatcraft
- Model
- intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller
- Equipment
- Walk-in cooler / freezer refrigeration controller
- Equipment type
- Other equipment
- BACnet objects
- 111 (71 writable)
- Transport
- BACnet MS/TP
- Firmware
- Standard BACnet objects need iRC firmware 01.03.xxxx or later
- Also known as
- intelliGen iIC, intelliGen Integration Card, iIC, intelliGen Refrigeration Controller, iRC, 25011901
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Reference only, provided as-is: verify against Heatcraft’s current documentation and the live device before use. Not official Heatcraft information. Terms of use.
BMS integration notes: Heatcraft intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller
Integration in brief
Select BACnet on the controller (Connectivity menu or the web page) with the external Modbus address set to 0, give the card an MS/TP address 1-127 and baud rate, then read box temperature, operating mode and alarms, and write the box setpoint if the BMS should own it.
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 48 | Box Temperature Setpoint | Box temperature setpoint | Write |
| AV 40 | Force Defrost | Write 1 to start a defrost | Write |
| AI 5 | Box temperature | Box temperature | Read |
| AI 4 | Operating mode | Operating mode: off, cooling, defrost, drain... | Read |
| AI 3 | System Alarms | System alarm bits, 0 = clear | Read |
| AI 160 | Local Alarms | Evaporator 1 alarm bits | Read |
Network setup
- Protocol is chosen on the iRC (Connectivity menu) or the intelliGen web page; for BACnet the external Modbus address must be 0.
- MS/TP address 1-127; baud 9600, 19200 or 38400. Number MS/TP devices consecutively from 1 with no gaps.
- If a webserver (iWC) or multi-system (MSC) card is used, fit the iIC on the same evaporator board.
- Temperatures read in the unit chosen by AV 36 (°F or °C).
Watch out for
- Local objects exist for 8 evaporators even when fewer are installed; check AI 2 / AI 136 block for which are present.
- Defrost schedules (AV 10-21) can only be written up to the number of defrosts in AV 9, and two defrosts cannot share a time.
Heatcraft intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller 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 | |||||
|---|---|---|---|---|---|---|
| AI | 1 | DST Offset | Daylight saving offset | Read | ||
| AI | 2 | Number Of Unit Records | Number of evaporators in the system | Read | ||
| AImin | 3 | System Alarms | System alarm bits (AL01... see manual bit table) | Read | Bit-mapped, 0=Clear, 1=Set | |
| AImin | 4 | Operating mode | System operating mode | Read | OP_OFF-0, OP_COOLING-1, OP_PUMPDOWN-2, OP_DEFROST-3, OP_DRAIN-4, OP_DELAY-5, OP_BOXLOAD-6, OP_MANUAL_EXV-7 OP_REFREEZE-10, OP_SERVICE-11, OP_A2L_OVERRIDE-12 | |
| AImin | 5 | Box temperature | Box (room) temperature | °F | Read | |
| AI | 6 | Date/Time Type | Date/time format code | Read | ||
| AI | 16 | Box Temperature Sensor Calibration | Evaporator 1; evaporators 1-8 = AI 16-23 | °F | Read | |
| AI | 24 | EV Suction Temperature Sensor Calibration | Evaporator 1; evaporators 1-8 = AI 24-31 | °F | Read | |
| AI | 32 | EV Suction Pressure Sensor Calibration | Evaporator 1; evaporators 1-8 = AI 32-39 | psig | Read | |
| AI | 40 | EV Auxiliary Temperature Sensor Calibration | Evaporator 1; evaporators 1-8 = AI 40-47 | °F | Read | |
| AI | 48 | EV Coil Temperature Sensor Calibration | Evaporator 1; evaporators 1-8 = AI 48-55 | °F | Read | |
| AI | 56 | EXV Step Position | Evaporator 1; evaporators 1-8 = AI 56-63 | Read | ||
| AI | 64 | Evap suction tempearature | Evaporator 1; evaporators 1-8 = AI 64-71 | °F | Read | |
| AI | 72 | SST | Evaporator 1; evaporators 1-8 = AI 72-79 | °F | Read | |
| AI | 80 | Evap Suction pressure | Evaporator 1; evaporators 1-8 = AI 80-87 | psia | Read | |
| AI | 88 | Evap superheat | Evaporator 1; evaporators 1-8 = AI 88-95 | °F | Read | |
| AI | 96 | Primary Temperature Sensor Value | Evaporator 1; evaporators 1-8 = AI 96-103 | °F | Read | |
| AI | 104 | Auxiliary Temperature Sensor Value | Evaporator 1; evaporators 1-8 = AI 104-111 | °F | Read | |
| AI | 112 | Coil Temperature Sensor Value | Evaporator 1; evaporators 1-8 = AI 112-119 | °F | Read | |
| AI | 128 | Unit Address | Evaporator 1; evaporators 1-8 = AI 128-135 | Read | ||
| AI | 136 | Object Installed/Enable | Evaporator 1; evaporators 1-8 = AI 136-143 | Read | ||
| AI | 144 | EV Length of Last Defrost | Evaporator 1; evaporators 1-8 = AI 144-151 | Read | ||
| AI | 152 | EV RCB Control Voltage | Evaporator 1; evaporators 1-8 = AI 152-159 | Read | ||
| AImin | 160 | Local Alarms | Evaporator 1; evaporators 1-8 = AI 160-167 | Read | Bit-mapped, 0=Clear, 1=Set | |
| CSV | 14 | RDS SW Version | Evaporator 1; evaporators 1-8 = CSV 14-21 | Read | ||
| AI | 168 | EXV Type | Evaporator 1; evaporators 1-8 = AI 168-175 | Read | 0 - Carel(0 to 255), 1 - Sporlan(0 to 2500) 2 - TXV 3 - EXV-CCMT 3L 5L 8L 4 - EXV-Emerson CV4-7 5 - EXV-CCMT 2 4 8 6 - EXV-CCMT 16 7 - EXV-CCMT 24 8 - EXV-CCMT 30 9 - EXV-CCMT 42 | |
| AI | 176 | RDS Mitigation Controller Communication Status | Evaporator 1; evaporators 1-8 = AI 176-183 | Read | 1 - Initializing, 2 - Active, 3 - Communication Failure | |
| AI | 184 | RDS Mitigation Controller Sensor count | Evaporator 1; evaporators 1-8 = AI 184-191 | Read | ||
| AI | 192 | RDS Mitigation Controller state | Evaporator 1; evaporators 1-8 = AI 192-199 | Read | 0 - Null, 1- Initializing, 2 - Monitoring, 3 - Mitigating, 4 - Servicing, 5 - Fault, 6 - User Test, 7 - Factory Reset | |
| AI | 200 | RDS Sensor x status | Block 200-223 (8 units x 3 sensors); first object | Read | 0 - Normal, 1 - Service, 2 - Fault, 3 - Mitigation | |
| AI | 224 | RDS Sensor x %LFL | Block 224-247 (8 units x 3 sensors); first object | % | Read | |
| AI | 248 | RDS Sensor x Temperature | Block 248-271 (8 units x 3 sensors); first object | °C | Read | |
| AI | 272 | RDS Sensor x Relative Humidity | Block 272-295 (8 units x 3 sensors); first object | % | Read | |
| AI | 296 | RDS Sensor x Supported Refrigerant | Block 296-319 (8 units x 3 sensors); first object | Read | Bit-mapped, 0=Clear, 1=Set | |
| AI | 320 | RDS Sensor x Mitigation Threshold | Block 320-343 (8 units x 3 sensors); first object | % | Read | |
| AI | 344 | RDS Model Number | Evaporator 1; evaporators 1-8 = AI 344-351 | Read | ||
| AI | 352 | A2L Unit alarm | Evaporator 1; evaporators 1-8 = AI 352-359 | Read | Bit-mapped, 0=Clear, 1=Set | |
| AV | 1 | Defrost Style | Write | TIMED-0, SMART-1, DEMAND-2 | ||
| AV | 2 | Box Temperature Differential | °F | Write | ||
| AV | 3 | Product Load Mode Time Delay | min | Write | ||
| AV | 4 | Product Load Mode Timer | Product load mode maximum time | min | Write | |
| AV | 5 | Low Superheat Setpoint | °F | Write | ||
| AV | 6 | Minimum Runtime | min | Write | ||
| AV | 7 | Minimum Offtime | min | Write | ||
| AV | 8 | Drain Down Period | min | Write | ||
| AV | 9 | Number of Defrosts | Defrosts per day | Write | ||
| AV | 10 | Defrost 1 Schedule | min | Write | ||
| AV | 11 | Defrost 2 Schedule | min | Write | ||
| AV | 12 | Defrost 3 Schedule | min | Write | ||
| AV | 13 | Defrost 4 Schedule | min | Write | ||
| AV | 14 | Defrost 5 Schedule | min | Write | ||
| AV | 15 | Defrost 6 Schedule | min | Write | ||
| AV | 16 | Defrost 7 Schedule | min | Write | ||
| AV | 17 | Defrost 8 Schedule | min | Write | ||
| AV | 18 | Defrost 9 Schedule | min | Write | ||
| AV | 19 | Defrost 10 Schedule | min | Write | ||
| AV | 20 | Defrost 11 Schedule | min | Write | ||
| AV | 21 | Defrost 12 Schedule | min | Write | ||
| AV | 22 | Defrost Failsafe Time | min | Write | ||
| AV | 23 | Defrost End Setpoint | °F | Write | ||
| AV | 24 | Refreeze Time Safety | min | Write | ||
| AV | 25 | Refreeze Suction Setpoint | °F | Write | ||
| AV | 26 | Alarm High Box Temperature setpoint | °F | Write | ||
| AV | 27 | Alarm Low Box Temperature setpoint | °F | Write | ||
| AV | 28 | Alarm Delay Time | min | Write | ||
| AV | 29 | Alarm Door Open Time | min | Write | ||
| AV | 30 | Country | Write | 0-USA, 1-CANADA | ||
| AV | 31 | Time Zone | Write | MST-0, NST-1, AST-2, EST-3, CST-4, MST-5, PST-6, AKST-7, HAST-8, SST-9, CHST-10, WAKT-11 | ||
| AV | 32 | UTC Offset | Write | |||
| AV | 33 | Follow DST (DayLight Savings) | Write | Proprietary: Yes, No Standard: 0 -No, 1 - Yes | ||
| AV | 34 | Defrost Type | Write | AIR -0, MTEL -1, LTEL - 2 | ||
| AV | 35 | Refrigerant | Write | R404A - 0, R507A - 1, R407A - 2, R407C - 3, R407F - 4, R22 - 5, R448A - 6, R449A - 7 R-744(CO2) - 8, R454A(A2L) - 9, R454C(A2L) - 10, R455A(A2L) - 11 | ||
| AV | 36 | Temperature Units | Write | FAHRENHEIT - 0, CELSIUS - 1 | ||
| AV | 37 | Pressure Units | Write | PSIG – 0, KPA -1, BAR – 2 | ||
| AV | 38 | Dual Coil Termination | Write | Yes, No | ||
| AV | 39 | 12/24 Hour Clock | Write | 0 -12H, 1 -24H | ||
| AVmin | 40 | Force Defrost | Write 1 to start a defrost | Write | ||
| AV | 41 | Primary EV Address | Write | |||
| AV | 42 | BACnet Baud rate | Write | 0 - 9600, 2 - 38400 | ||
| AV | 43 | Enter Service mode | Service mode on/off | Write | 0-Exit Service Mode 1-Enter Service Mode | |
| AV | 44 | Light Bar Enable | Write | Proprietary: True - On, False - Off Standard: 0 - Off, 1 - On | ||
| AV | 45 | external MODbus address | Read | |||
| AV | 46 | externalBACnet address | Write | |||
| AV | 47 | Condensing unit wired | Write | 0 - NO , NON-ZERO - RCB address | ||
| AVmin | 48 | Box Temperature Setpoint | Box temperature setpoint | °F | Write | |
| AV | 49 | EXV Control Algorithm Reset | Write 1 to reset EXV control | Write | ||
| AV | 50 | Digital Scroll Comp Support Enable | Write | 0 - Disable, 1 - Enable | ||
| AV | 51 | DSC Rolling Average Period | s | Write | ||
| AV | 52 | DSC EXV Update Rate | s | Write | ||
| AV | 53 | CO2 System Type | Write | 0 - Low Temp 1 - Medium Temp | ||
| AV | 54 | CO2 Max Operating Pressure | Write | |||
| AV | 55 | Lead Lag Alarm Delay Period | min | Write | ||
| AV | 56 | Lead Lag Slope Set Point | °/min | Write | ||
| AV | 57 | Lead Lag Box Temp Set Point | °F | Write | ||
| AV | 58 | Lead Lag Differential | °F | Write | ||
| AV | 61 | EV Fan Control Style | Evaporator 1; evaporators 1-8 = AV 61-68 | Write | 0 - Standard, 1 - Two Speed, 2 - Variable, 3 - Off | |
| AV | 69 | EV Fan Stir Enable | Evaporator 1; evaporators 1-8 = AV 69-76 | Write | 0 - Off, 1 - On | |
| AV | 77 | EV Fan Stir Cycle Frequency | Evaporator 1; evaporators 1-8 = AV 77-84 | min | Write | |
| AV | 85 | EV Fan Stir Duty Cycle | Evaporator 1; evaporators 1-8 = AV 85-92 | % | Write | |
| AV | 93 | EV Fan Speed (Off Cycle) | Evaporator 1; evaporators 1-8 = AV 93-100 | % | Write | |
| AV | 101 | Door Switch Configuration | Evaporator 1; evaporators 1-8 = AV 101-108 | Write | 0 - None, 1 - Normally Closed, 2 - Normally Open | |
| AV | 109 | Pressure Transducer Type | Evaporator 1; evaporators 1-8 = AV 109-116 | Write | 0 - 139.7 psia 1 - 300 psia 2 - 500 psia 3 - 650 psia (Emerson 800-2650) 4 - 0 to 652 psig (Sporlan 952579) 5 - 870.2 psia (Danfoss 060G6342) 6 - 1000 psia (Emerson 800-2710) 7 - 2000 psig (Sporlan 9520010) | |
| AV | 117 | EV Superheat Setpoint | Evaporator 1; evaporators 1-8 = AV 117-124 | °F | Write | |
| CSV | 2 | Lead Lag Group Name | Read | |||
| CSV | 5 | Short Unit Name | Evaporator 1; block printed as CSV 5-13 | Read | ||
| DTV | 1 | Date/Time | Controller date and time | Write | ||
| AV | 59 | Enter Manual EXV Mode | Write | 0 - Exit Manual EXV Mode, 1 - Enter Manual EXV Mode | ||
| AV | 60 | RDS Mitigation Controller Early warning Threshold value (%LFL) | % | Write | ||
| AV | 125 | Adjust EXV Step Position | Evaporator 1; evaporators 1-8 = AV 125-132 | Write | ||
| AV | 133 | RDS Installed? | Evaporator 1; evaporators 1-8 = AV 133-140 | Write | 0 - No, 1 - Yes | |
| AV | 1001 | Language | Display language | Write | 1-English, 2-Spanish, 3-French |
No points match these filters.
Object ID lookup: Heatcraft intelliGen Integration Card for the intelliGen Refrigeration Controller point IDs by name
AI1DST OffsetAI2Number Of Unit RecordsAI3System AlarmsAI4Operating modeAI5Box temperatureAI6Date/Time TypeAI16Box Temperature Sensor CalibrationAI24EV Suction Temperature Sensor CalibrationAI32EV Suction Pressure Sensor CalibrationAI40EV Auxiliary Temperature Sensor CalibrationAI48EV Coil Temperature Sensor CalibrationAI56EXV Step PositionAI64Evap suction tempearatureAI72SSTAI80Evap Suction pressureAI88Evap superheatAI96Primary Temperature Sensor ValueAI104Auxiliary Temperature Sensor ValueAI112Coil Temperature Sensor ValueAI128Unit AddressAI136Object Installed/EnableAI144EV Length of Last DefrostAI152EV RCB Control VoltageAI160Local AlarmsCSV14RDS SW VersionAI168EXV TypeAI176RDS Mitigation Controller Communication StatusAI184RDS Mitigation Controller Sensor countAI192RDS Mitigation Controller stateAI200RDS Sensor x statusAI224RDS Sensor x %LFLAI248RDS Sensor x TemperatureAI272RDS Sensor x Relative HumidityAI296RDS Sensor x Supported RefrigerantAI320RDS Sensor x Mitigation ThresholdAI344RDS Model NumberAI352A2L Unit alarmAV1Defrost StyleAV2Box Temperature DifferentialAV3Product Load Mode Time DelayAV4Product Load Mode TimerAV5Low Superheat SetpointAV6Minimum RuntimeAV7Minimum OfftimeAV8Drain Down PeriodAV9Number of DefrostsAV10Defrost 1 ScheduleAV11Defrost 2 ScheduleAV12Defrost 3 ScheduleAV13Defrost 4 ScheduleAV14Defrost 5 ScheduleAV15Defrost 6 ScheduleAV16Defrost 7 ScheduleAV17Defrost 8 ScheduleAV18Defrost 9 ScheduleAV19Defrost 10 ScheduleAV20Defrost 11 ScheduleAV21Defrost 12 ScheduleAV22Defrost Failsafe TimeAV23Defrost End SetpointAV24Refreeze Time SafetyAV25Refreeze Suction SetpointAV26Alarm High Box Temperature setpointAV27Alarm Low Box Temperature setpointAV28Alarm Delay TimeAV29Alarm Door Open TimeAV30CountryAV31Time ZoneAV32UTC OffsetAV33Follow DST (DayLight Savings)AV34Defrost TypeAV35RefrigerantAV36Temperature UnitsAV37Pressure UnitsAV38Dual Coil TerminationAV3912/24 Hour ClockAV40Force DefrostAV41Primary EV AddressAV42BACnet Baud rateAV43Enter Service modeAV44Light Bar EnableAV45external MODbus addressAV46externalBACnet addressAV47Condensing unit wiredAV48Box Temperature SetpointAV49EXV Control Algorithm ResetAV50Digital Scroll Comp Support EnableAV51DSC Rolling Average PeriodAV52DSC EXV Update RateAV53CO2 System TypeAV54CO2 Max Operating PressureAV55Lead Lag Alarm Delay PeriodAV56Lead Lag Slope Set PointAV57Lead Lag Box Temp Set PointAV58Lead Lag DifferentialAV61EV Fan Control StyleAV69EV Fan Stir EnableAV77EV Fan Stir Cycle FrequencyAV85EV Fan Stir Duty CycleAV93EV Fan Speed (Off Cycle)AV101Door Switch ConfigurationAV109Pressure Transducer TypeAV117EV Superheat SetpointCSV2Lead Lag Group NameCSV5Short Unit NameDTV1Date/TimeAV59Enter Manual EXV ModeAV60RDS Mitigation Controller Early warning Threshold value (%LFL)AV125Adjust EXV Step PositionAV133RDS Installed?AV1001Language
Integration notes
- Per-evaporator objects are printed as 8-instance blocks (for example AI 16-23 = Box Temperature Sensor Calibration for evaporators 1-8). Only the first object of each block (evaporator 1) is listed here; evaporator n is the first instance + (n - 1).
- The RDS sensor blocks are 24 instances (8 units x 3 sensors); the manual does not say whether they run by unit or by sensor, so only the first object is listed.
- The Short Unit Name block is printed as CSV 5-13 (9 instances) although it is marked 8x.
- Writing a local object for an evaporator that is not installed does nothing; it reads back a default value.
- System Alarms (AI 3) and Local Alarms (AI 160 block) are 32-bit bit maps; the manual has bit tables. The proprietary object types and property IDs in the manual are left out.
- Several writes are conditional (for example force defrost not in service mode, low superheat setpoint not with a TXV); see the manual's read/write special cases.
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 intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller 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 Heatcraft intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller
How many BACnet points does the Heatcraft intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller have?
This list has 111 BACnet objects: 36 analog inputs, 71 analog values, 3 characterstring values, 1 datetime value. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Heatcraft intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller BACnet points are writable?
71 of the 111 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 Heatcraft intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller BACnet documentation?
The source is intelliGen Integration Card (iIC) Installation & Operation Manual (Part No. 25011901), revision September 2026, published free by Heatcraft at https://www.heatcraftrpd.com/dA/0784ac1446/intelliGen%20iIC%20I&O%20Manual%202023.pdf.
What are the minimum BACnet points to integrate the Heatcraft intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller?
Start with AV 48 Box Temperature Setpoint (Box temperature setpoint); AV 40 Force Defrost (Write 1 to start a defrost); AI 5 Box temperature (Box temperature); AI 4 Operating mode (Operating mode: off, cooling, defrost, drain); AI 3 System Alarms (System alarm bits, 0 = clear); AI 160 Local Alarms (Evaporator 1 alarm bits).
How do I check these points on the real intelliGen Integration Card (iIC) for the intelliGen Refrigeration Controller?
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 Heatcraft BACnet points lists
Source: intelliGen Integration Card (iIC) Installation & Operation Manual · Part No. 25011901 · rev. September 2026. Object names, instances and units are reproduced as published; descriptions are our own.